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<figure class="figcenter width500" id="cover" style="width: 2560px;">
<img src="images/cover.jpg" width="2560" height="4490" alt="This
1882 biography explores Maxwell's personal history, groundbreaking
scientific mind, private letters, and poetry.">
</figure>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p class="nindc space-below2 space-above2"><span class="large">LIFE OF JAMES CLERK MAXWELL</span></p>
</div>

<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<figure class="figcenter width500" id="i_008" style="width: 200px;">
<img src="images/i_008.jpg" width="200" height="101" alt="decorative">
</figure>
</div>

<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<figure class="figcenter width500" id="i_010" style="width: 500px;">
<img src="images/i_010.jpg" width="500" height="561" alt="A portrait
engraving of James Clerk Maxwell — shown in profile with his
characteristic full beard.">
<figcaption class="caption">
<p>James Clerk Maxwell. Engraved by G. D. Stodart from a
Photograph by Fergus of Greenock.</p></figcaption>
</figure>
</div>

<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h1>THE LIFE<br>
<span class="allsmcap">OF</span><br>
JAMES CLERK MAXWELL</h1>


<p class="nindc space-below2 space-above2">WITH A SELECTION FROM HIS CORRESPONDENCE
AND OCCASIONAL WRITINGS</p>

<p class="nindc"><span class="allsmcap">AND</span></p>

<p class="nindc space-below2 space-above2">A SKETCH OF HIS CONTRIBUTIONS TO SCIENCE</p>

<p class="nindc space-below2 space-above2"><span class="allsmcap">BY</span></p>

<p class="nindc">LEWIS CAMPBELL, M.A., LL.D.</p>

<p class="center"><span class="allsmcap">PROFESSOR OF GREEK IN THE UNIVERSITY OF ST. ANDREWS</span></p>

<p class="nindc"><span class="allsmcap">AND</span></p>

<p class="nindc">WILLIAM GARNETT, M.A.</p>

<p class="nindc"><span class="allsmcap">LATE FELLOW OF ST. JOHN’S COLLEGE, CAMBRIDGE
PROFESSOR OF NATURAL PHILOSOPHY IN UNIVERSITY COLLEGE, NOTTINGHAM</span></p>

<p class="center"><span class="allsmcap">WITH THREE STEEL PORTRAITS, COLOURED PLATES, ETC.</span></p>

<p class="nindc space-below2 space-above2"><span class="allsmcap">London</span><br>
<span class="allsmcap">MACMILLAN AND CO.</span></p>

<p class="nindc">1882</p>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0"><i>And so thou wast made perfect! Not a friend</i></div>
    <div class="verse indent2"><i>Might step between thee and the sore distress</i></div>
    <div class="verse indent2"><i>Which thou with strong and patient godliness</i></div>
    <div class="verse indent0"><i>Enduredst uncomplaining to the end.</i></div>
    <div class="verse indent0"><i>Heroic saint! Bright sufferer! Thou dost lend</i></div>
    <div class="verse indent2"><i>To science a new glory. Midst the press</i></div>
    <div class="verse indent2"><i>Of boasters, all thy meek-eyed fame confess,</i></div>
    <div class="verse indent0"><i>And worldlings thine unworldliness commend.</i></div>
  </div>
  <div class="stanza">
    <div class="verse indent0"><i>Shine on, pure spirit! Though we see thee not,</i></div>
    <div class="verse indent2"><i>Even in thy passage thou hast purged away</i></div>
    <div class="verse indent0"><i>The fogs of earth-born doubt and sense-bound thought</i></div>
    <div class="verse indent2"><i>From hearts that followed thine all-piercing ray.</i></div>
    <div class="verse indent0"><i>And while thou sourest far from human view,</i></div>
    <div class="verse indent0"><i>Even thy faint image shall our strength renew.</i></div>
  </div>
</div>
</div>
</div>

<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_vii">[Pg vii]</span></p>
<h2 class="nobreak" id="PREFACE">PREFACE.</h2>
</div>

<p class="nind">
IN a work which has more than one author, it is right to distinguish as
far as possible what has been contributed by each.</p>

<p>The first part of this book, then, has been mainly composed by the
present writer (who has acted as editor), and the second by Mr.
Garnett; but it is due to Mr. Garnett to add that, while he had the
chief share of the labour of collecting materials for the whole
biography, and the entire burden of the account here given of Maxwell’s
contributions to science, the substance of <a href="#CHAPTER_XI">Chapters XI.</a> <a href="#CHAPTER_XII">XII.</a> <a href="#CHAPTER_XIII">XIII.</a> is
also largely drawn from information obtained through him. The matter
of whole pages remains almost in his very words, although for the sake
of uniformity and simplicity the first person has still been used in
speaking of my own reminiscences.</p>

<p>The narrative of Maxwell’s early life has been facilitated—(1) by a
diary kept by Maxwell’s father from 1841 to 1847, and often referred to
in these pages as “the Diary;” (2) by two albums containing a series of
water-colour drawings by Maxwell’s first cousin, Mrs. Hugh Blackburn
(<i>née</i> Isabella Wedderburn), the value of which may be inferred
from the<span class="pagenum" id="Page_viii">[Pg viii]</span> outlined reproductions of a few of them prepared by Mrs.
Blackburn herself as illustrations for this book. They are literally
<i>bits out of the past</i>, each containing an exact representation,
by a most accurate observer and clever draughtswoman, of some incident
which had just happened when the sketch was made. The figures, even as
outlined, bring back the persons with singular vividness to the memory
of those who knew them.</p>

<p>For these and many other advantages the thanks of the authors are due
to Maxwell’s relatives, but above all to his widow, not only for the
free access she has given them to various documents, such as those
mentioned above, but for the generous confidence she has reposed in
them throughout, and for many important suggestions made by her during
the progress of the work.</p>

<p>Their thanks are also due in an especial manner to Professor G. G.
Stokes of Cambridge for his kindness in reading most of <a href="#PART_II">Part II.</a> in
MS., and for many valuable suggestions both with regard to the subject
matter and the mode of treating it, which were received from him; and
to Professor P. G. Tait of the University of Edinburgh for his zealous
and able assistance in many ways.</p>

<p>The book owes much, of course, to those who entrusted the letters here
published to the authors’ care. Their names are duly mentioned in
the course of the work. Our task has also been lightened by the help
of those friends whose contributions are inserted with their names.
In describing the life of<span class="pagenum" id="Page_ix">[Pg ix]</span> one who was so many-sided, it is no small
advantage to be thus enabled to register the impression which he made
on different men. Even should this occasion slight repetitions and
discrepancies, the reader may thus form a fuller and, on the whole, a
truer image than could be conveyed by a single narrator. Attention is
here particularly directed to the statements in <a href="#CHAPTER_III">Chapter XIII.</a> by Dr.
Paget, the Rev. Dr. Guillemard (of Little St. Mary’s, Cambridge), and
Professor Hort.</p>

<p>As a general rule, no attempt has been made to weave the correspondence
into the narrative. The facts relating to each period have been grouped
together, and the letters have been appended to these in chronological
order.</p>

<p>A word should be said respecting <a href="#PART_III">Part III</a>. Whatever may be the judgment
of critics as to the literary merits of Maxwell’s occasional writings
in verse, there can be no doubt of their value for the purpose of the
present work. Like everything which he did, they are characteristic of
him, and some of them have a curious biographical interest. Maxwell was
singularly reserved in common life, but would sometimes in solitude
express his deepest feelings in a copy of verses which he would
afterwards silently communicate to a friend. Again, he shrank from
controversy. But his active mind was constantly playing on contemporary
fallacies, or what appeared so to him, and his turn for parody and
burlesque enabled him to give humorous expression to his criticism of
mistaken methods. Of the later pieces here reproduced, several appeared
in <i>Nature</i> with the signature \(\dfrac{d p}{d t}\) (which<span class="pagenum" id="Page_x">[Pg x]</span>
happens to be the analytical equivalent of the thermodynamical formula
JCM); and one (the “Notes on the President’s Address”) was published in
<i>Blackwood’s Magazine</i> for December 1874. The greater number are
now printed for the first time.</p>

<p>The juvenile verses and translations have been included for the same
reason which has led to the prominence given to the early life in <a href="#PART_I">Part
I</a>. If we are right in our estimate of Maxwell, it must be interesting
to watch the unfolding of such a mind and character from the first,
and this not only for the psychological student, but for all those who
share Wordsworth’s fondness for “days” that are “linked each to each
with natural piety.”</p>

<p>While the last sheets were being revised for the press the sad news
arrived that Maxwell’s first cousin, Mr. Colin Mackenzie, had died on
board the <i>Bosnia</i>, on his way home from America. There was no one
whose kind encouragement had more stimulated the preparation of this
volume, or whose pleasure in it would have been a more welcome reward.
But he, too, is gone before his time, and this book will be sent into
the world with fewer good wishes. He deserves to be remembered with
affection wherever the name of James Clerk Maxwell is honoured or
beloved.</p>

<p class="right"><span class="allsmcap">LEWIS CAMPBELL.</span></p>

<p><i>August 1882.</i></p>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">

<h2 class="nobreak" id="CONTENTS">CONTENTS</h2>
<p><span class="pagenum" id="Page_xi">[Pg xi]</span></p>
</div>

<table class="autotable">
<tbody><tr>
<td class="tdc">PART I.—BIOGRAPHICAL OUTLINE.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdc">CHAPTER I.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"></td>
<td class="tdr"><span class="allsmcap">PAGE</span></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Birth and Parentage</span></td>
<td class="tdr"><a href="#Page_1">1</a></td>
</tr><tr>
<td class="tdlh"><i>Note</i>.—The Clerks of Penicuik and Maxwells of Middlebie</td>
<td class="tdr"><a href="#Page_16">16</a></td>
</tr><tr>
<td class="tdc">CHAPTER II.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Glenlair—Childhood—1831-1841</span></td>
<td class="tdr"><a href="#Page_24">24</a></td>
</tr><tr>
<td class="tdc">CHAPTER III.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Boyhood—1841-1844</span></td>
<td class="tdr"><a href="#Page_45">45</a></td>
</tr><tr>
<td class="tdc">CHAPTER IV.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Adolescence—1844-1847</span></td>
<td class="tdr"><a href="#Page_66">66</a></td>
</tr><tr>
<td class="tdlh"><i>Note</i>.—Oval and Meloid</td>
<td class="tdr"><a href="#Page_91">91</a></td>
</tr><tr>
<td class="tdc">CHAPTER V.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Opening Manhood—1847-1850</span></td>
<td class="tdr"><a href="#Page_105">105</a></td>
</tr><tr>
<td class="tdc">CHAPTER VI.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Undergraduate Life at Cambridge—1850-1854</span><span class="pagenum" id="Page_xii">[Pg xii]</span></td>
<td class="tdr"><a href="#Page_146">146</a></td>
</tr><tr>
<td class="tdc">CHAPTER VII.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Bachelor-Scholar and Fellow of Trinity—1854-1856</span></td>
<td class="tdr"><a href="#Page_197">197</a></td>
</tr><tr>
<td class="tdc">CHAPTER VIII.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Essays at Cambridge—1853-1856</span></td>
<td class="tdr"><a href="#Page_223">223</a></td>
</tr><tr>
<td class="tdc">CHAPTER IX.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Death of his Father—Professorship at Aberdeen—</span><br>
<span class="tdlh">1856-1857</span></td>
<td class="tdr"><a href="#Page_247">247</a></td>
</tr><tr>
<td class="tdc">CHAPTER X.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Aberdeen—Marriage—1857-1860</span></td>
<td class="tdr"><a href="#Page_274">274</a></td>
</tr><tr>
<td class="tdc">CHAPTER XI.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">King’s College, London—Glenlair—1860-1870</span></td>
<td class="tdr"><a href="#Page_314">314</a></td>
</tr><tr>
<td class="tdc">CHAPTER XII.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Cambridge—1871-1879</span></td>
<td class="tdr"><a href="#Page_348">348</a></td>
</tr><tr>
<td class="tdc">CHAPTER XIII.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Illness and Death—1879</span></td>
<td class="tdr"><a href="#Page_406">406</a></td>
</tr><tr>
<td class="tdc">CHAPTER XIV.</td>
<td class="tdl"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Last Essays at Cambridge</span></td>
<td class="tdr"><a href="#Page_434">434</a><span class="pagenum" id="Page_xiii">[Pg xiii]</span></td>
</tr><tr>
<td class="tdc">PART II—CONTRIBUTIONS TO SCIENCE.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">1. Experiments on Colour Vision, and other Contributions</span><br>
<span class="tdlh"><span class="allsmcap">to Optics</span></span></td>
<td class="tdr"><a href="#Page_465">465</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">2. Investigations respecting Elastic Solids</span></td>
<td class="tdr"><a href="#Page_491">491</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">3. Pure Geometry</span></td>
<td class="tdr"><a href="#Page_496">496</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">4. Mechanics</span></td>
<td class="tdr"><a href="#Page_498">498</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">5. Saturn’s Kings</span></td>
<td class="tdr"><a href="#Page_501">501</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">6. Faraday’s Lines op Force, and Maxwell’s Theory of</span><br>
<span class="tdlh"><span class="allsmcap">the Electromagnetic Field, including the</span></span><br>
<span class="tdlh"><span class="allsmcap">Electromagnetic Theory op Light, and other</span></span><br>
<span class="tdlh"><span class="allsmcap">Investigations in Electricity</span></span></td>
<td class="tdr_bot"><a href="#Page_513">513</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">7. Molecular Physics</span></td>
<td class="tdr"><a href="#Page_559">559</a></td>
</tr><tr>
<td class="tdc">PART III.—POEMS.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">1. Juvenile Verses and Translations</span></td>
<td class="tdr"><a href="#Page_577">577</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">2. Occasional Pieces</span></td>
<td class="tdr"><a href="#Page_593">593</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">3. Serio-Comic Verse</span></td>
<td class="tdr"><a href="#Page_609">609</a></td>
</tr><tr>
<td class="tdl">INDEX 653</td>
<td class="tdr"><a href="#Page_653">653</a></td>
</tr>
 </tbody>
</table>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_xv">[Pg xv]</span></p>

<h2 class="nobreak" id="LIST_OF_ILLUSTRATIONS">LIST OF ILLUSTRATIONS.</h2>
</div>

<table class="autotable">
<tbody><tr>
<td class="tdc">STEEL PLATES.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">JAMES CLERK MAXWELL</span>. Engraved by Stodart, after a<br>
<span class="tdlh">Photograph by Fergus of Greenock</span></td>
<td class="tdr_bot"><i>Frontispiece</i>.</td>
</tr><tr>
<td class="tdl"><span class="allsmcap">John Clerk Maxwell</span>, <i>Æt</i>. 66. Engraved by Stodart,<br>
<span class="tdlh">after Sir John Watson Gordon, R.A.</span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_11">11</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Mrs. Clerk Maxwell and “Boy.”</span> Engraved by Stodart,<br>
<span class="tdlh">after William Dyce, R.A.</span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_29">29</a></td>
</tr><tr>
<td class="tdc">LITHOGRAPHS.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Facsimile Letter</span></td>
<td class="tdr"><i>To face page</i> <a href="#Page_58">58</a></td>
</tr><tr> 
<td class="tdl"><span class="allsmcap">The Vampyre, Compylt into Meeter, by Jas. Clerka</span><br>
<span class="tdlh"><span class="allsmcap">Maxwell</span></span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_70">70</a></td>
</tr><tr>
<td class="tdc">COLOURED PLATES.</td>
<td class="tdr"></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Diagram showing the Relations of Light</span></td>
<td class="tdr"><i>To face page</i> <a href="#Page_473">473</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Diagram illustrating the Chromatic Relations of</span><br>
<span class="tdlh"><span class="allsmcap">Coloured Papers</span></span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_474">474</a><span class="pagenum" id="Page_xvi">[Pg xvi]</span></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Chromatic Effects of a Pentagon of Unannealed Glass</span><br>
<span class="tdlh"><span class="allsmcap">in Polarised Light</span></span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_487">487</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Isochromatic Lines In A Triangle Of Unannealed</span><br>
<span class="tdlh"><span class="allsmcap">Glass</span></span></td>
<td class="tdr_bot"><i>To face page</i> <a href="#Page_487">487</a></td>
</tr><tr>
<td class="tdl"><span class="allsmcap">Diagram Showing The Colours Exhibited By A Plate Of</span><br>
<span class="tdlh"><span class="allsmcap">Gelatine When Exposed To A Torsional Shear</span></span></td>
<td class="tdr_bot"> <i>To face page</i> <a href="#Page_491">491</a></td>
</tr>
 </tbody>
</table>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_1">[Pg 1]</span></p>

<h2 class="nobreak" id="PART_I">PART I.<br>
<br>
CHAPTER I.<br>
<span class="allsmcap">INTRODUCTORY—BIRTH AND PARENTAGE.</span></h2>
</div>


<p class="nind">
ONE who has enriched the inheritance left by Newton and
has consolidated the work of Faraday,—one who impelled the mind of
Cambridge to a fresh course of real investigation,—has clearly earned
his place in human memory.</p>

<p>But there was more in James Clerk Maxwell than is implied in any praise
that can be awarded to the discoverer, or in the honour justly due to
the educational reformer,—much, indeed, which his friends feel they
can but partly estimate, and still less adequately describe.</p>

<p>We have, notwithstanding, undertaken this imperfect Memoir of him, in
which the purpose of this First Part will be to trace the growth from
childhood to maturity, and to record the untimely death, of a man of
profound original genius, who was also one of the best men who have
lived, and, to those who knew him, one of the most delightful and
interesting of human beings.</p>

<p>If I can bring before the readers mind, even in shadowy outline,
the wise and gentle but curiously<span class="pagenum" id="Page_2">[Pg 2]</span> blended influences which formed
the cradle of his young imagination, the channels through which
ideas reached him from the past, the objects which most challenged
his observation and provoked his invention, his first acquaintance
with what permanently interested him in contemporary speculation and
discovery, and the chief moments of his own intellectual progress in
earlier years,—such record should have a right to live. And it may be
that a congenial spirit here and there may look with me into the depths
of this unique personality, and feel the value of the impulses, often
seemingly wayward, and strange even to himself, with which the young
eagle “imped his wings” for flight, or taught his eyes to bear the
unclouded light. And many to whom modern Science is a sealed book may
find an interest in observing the combination of extraordinary gifts
with a no less remarkable simplicity and strength of character.</p>

<p>James Clerk Maxwell was born at No. 14 India Street, Edinburgh, on the
13th of June 1831. His parents were John Clerk Maxwell, one of the
Clerks of Penicuik, in Midlothian, and Frances, daughter of R. H. Cay,
Esq. of N. Charlton, Northumberland. Excepting a daughter, Elizabeth,
who had died in infancy, James was their only child.</p>

<p>Edinburgh was at this time the natural meeting-place for the best
spirits of the North. How much of intellect and individuality; of
genuine though often eccentric worth, of high thinking and plain
living, then forgathered in Auld Reekie, and found ample<span class="pagenum" id="Page_3">[Pg 3]</span> scope and
leisure there, is known to the lovers of Sir W. Scott and to the
readers of Lord Cockburn—both prominent figures in the Edinburgh of
1824-1831.</p>

<p>And the <i>agora</i> of “Modern Athens” was the Parliament House. There
the heir-presumptive could while away his time of waiting for “dead
men’s shoon”; there the laird’s brother might qualify for some berth
hereafter to be provided for him; and the son of those whose ancestral
estates had been impaired by rashness or misfortune, and who had
perchance sought the asylum of the Abbey, might hope through honourable
industry to restore the fallen house, or even to win new lustre for an
ancient name.</p>

<p>When John Clerk Maxwell, after leaving the University, first sought
those purlieus of the law, he was already a laird, although a younger
brother. For he had inherited the estate of Middlebie, which, by
the conditions of the entail under which it had descended from the
Maxwells,<a id="FNanchor_1" href="#Footnote_1" class="fnanchor">[1]</a> could not be held together with Penicuik, and was
therefore necessarily relinquished by Sir George Clerk in favour of his
brother John.</p>

<p>This arrangement had been completed when the two brothers were boys
together at the High School, and were living in George Square with
their mother and their sister Isabella. Their father, James Clerk,<a id="FNanchor_2" href="#Footnote_2" class="fnanchor">[2]</a>
who died before his elder brother, Sir John, was a naval captain in
the H.E.I.C.S., but retired<span class="pagenum" id="Page_4">[Pg 4]</span> early, and married Miss Janet Irving, who
thus became the mother of Sir George Clerk and of John Clerk Maxwell.
When Sir George had come of age, and taken up his abode at Penicuik,
John Clerk Maxwell continued living with his mother, Mrs. Clerk, in
Edinburgh. About 1820, in order to be near Isabella, Mrs. Wedderburn,
they “flitted” to a house in the New Town, No. 14 India Street, which
was built by special contract for them. Mrs. Clerk died there in the
spring of 1824.</p>

<p>The old estate of Middlebie had been considerably reduced, and there
was nothing in what remained of it to tempt its possessor, while a
single man, to leave Edinburgh, or to break off from his profession at
the Bar. There was not even a dwelling-house for the laird. Mr. Clerk
Maxwell therefore lived in Edinburgh until the age of thirty-six,
pacing the floor of the Parliament House, doing such moderate business
as fell in his way, and dabbling between-whiles in scientific
experiment. In vacation time he made various excursions in the
Highlands of Scotland and in the north of England, and kept a minute
record of his observations.</p>

<p>But when, after his mother’s death, he had married a lady of tastes
congenial to his own and of a sanguine active temperament, his strong
natural bent towards a country life became irresistible. The pair soon
conceived<span class="pagenum" id="Page_5">[Pg 5]</span> a wish to reside upon their estate, and began to form plans
for doing so; and they may be said to have lived thenceforth as if it
and they were made for one another. They set themselves resolutely
to the work of making that inheritance of stony and mossy ground to
become one of the habitable places of the earth. John Clerk Maxwell
had hitherto appeared somewhat indolent; and there was a good deal
of <i>inertia</i> in his composition. But the latent forces of his
character were now to be developed.</p>

<figure class="figcenter width500" id="i_029" style="width: 400px;">
<img src="images/i_029.jpg" width="400" height="177" alt="It depicts a
harvest scene — figures gathering crops in a field, a horse-drawn cart,
dogs, and onlooking men in top hats.">
</figure>

<p><span class="pagenum" id="Page_6">[Pg 6]</span></p>

<p>He was one of a race<a id="FNanchor_3" href="#Footnote_3" class="fnanchor">[3]</a> in whom strong individuality had occasionally
verged on eccentricity. For two centuries the Clerks had been
associated with all that was most distinguished in the Northern
kingdom, from Drummond of Hawthornden to Sir Walter Scott. Each
generation had been remarkable for the talents and accomplishments
of some of its members; and it was natural that a family with such
antecedents should have acquired something of clannishness. But any
<span class="pagenum" id="Page_7">[Pg 7]</span>
narrowing effect of such a tendency was counteracted by a strong
intellectual curiosity, which kept them <i>en rapport</i> with the
world, while they remained independent of the world. And as each scion
of the stock entered into new relations, the keen mutual interest,
instead of merely narrowing, became an element of width. I speak now
of the generation preceding our own. No house was ever more affluent
in that <i>Coterie-Sprache</i>, for which the Scottish dialect of that
day afforded such full materials. It would be pleasant, if possible,
to recall that humorous gentle speech, as it rolled the cherished
vocables like a sweet morsel on the tongue, or minced them with a lip
from which nothing could seem coarse or broad,—caressing them as
some Lady Bountiful may caress a peasant's child,—or as it coined
<i>sesquipedalia verba</i>, which passed current through the stamp
of kindred fancy. This quaint freemasonry was unconsciously a token
not only of family community, but also of that feudal fellowship with
dependents which was still possible, and which made the language and
the manners of the most refined to be often racy of the soil. But Time
will not stand still, and neither the delicate “couthy” tones, nor that
which they signified, can be fully realised to-day. But we can still
in part appreciate the playful irony which prompted these humorous
vagaries of old leisure, wherein true feeling found k modest veil, and
a naive philosophy lightened many troubles of life by making light of
them.</p>

<p>Mr. John Clerk Maxwell’s own idiosyncrasy, as has been said, was
well suited for a country life. But to give a true idea of him it
is necessary to be more precise. His main characteristic, beyond a
warm, affectionate heart, the soundest of sound sense, and absolute
sincerity, was a persistent practical interest in <i>all useful
processes</i>.<a id="FNanchor_4" href="#Footnote_4" class="fnanchor">[4]</a> When spending his holidays at Penicuik as a boy
from the Edinburgh High School (as well as long afterwards), he took
delight in watching the machinery of Mr. Cowan’s paper-mill, then
recently established in that neighbourhood. And Mr. R. D. Cay remembers
him, when still a young man living in India Street with his mother
(about 1821-24), to have been engaged, together with John Cay, who
was afterwards<span class="pagenum" id="Page_8">[Pg 8]</span> his brother-in-law, in a series of attempts to make
a bellows that should have a continuous even blast. We can readily
imagine, therefore, how closely he must have followed every step in the
gradual application of steam to industry, and the various mechanical
improvements which took place in his youth and early manhood.<a id="FNanchor_5" href="#Footnote_5" class="fnanchor">[5]</a></p>

<p>His practical thoroughness was combined with a striking absence of
conventionality and contempt for ornament. In matters however seemingly
trivial—nothing that had to be done was trivial to him—he considered
not what was usual, but what was best for his purpose. In the humorous
language which he loved to use, he declared in favour of doing things
with <i>judiciosity</i>. One who knew him well describes him as always
balancing one thing with another—exercising his reason about every
matter, great or small. He was fond of remarking, for example, on the
folly of coachmen in urging a horse to speed as soon as they saw the
top of a hill, when, by waiting half a minute until the summit was
really attained, they might save the animal. “A sad waste of work,” he
would say. Long before the days of “anatomical” bootmaking, he insisted
on having ample room for his feet. His square-toed shoes were made by
a country shoemaker under his direction on a last of his own and out
of a piece of leather chosen by himself. This<span class="pagenum" id="Page_9">[Pg 9]</span> is only one example of
the manner in which he did everything. It was thought out from the
beginning to the end, and so contrived as to be most economical and
serviceable in the long run. In his Diary (1841) we find him cutting
out his own and his son’s shirts, while planning the outbuildings which
still exist at Glenlair. And he not only planned these, but made the
working plans for the masons (1842) with his own hand.<a id="FNanchor_6" href="#Footnote_6" class="fnanchor">[6]</a> This habitual
careful adaptation of means to ends was the characteristic which
(together with profound simplicity) he most obviously transmitted to
his son. Its effect, heightened by perfect science, is still apparent
in the construction and arrangement of the Cavendish Laboratory at
Cambridge.</p>

<p>While thus unostentatious and plain in all his ways, he was essentially
liberal and generous. No one could look in his broad face beaming
with kindliness and believe otherwise. But his benevolence was
best known nearest home. And in caring for others, as in providing
for his own house, his actions were ruled, not by impulse, but
persistent thoughtfulness. By his ever-wakeful consideration, he
breathed an atmosphere of warm comfort and quiet contentment on all
(including the dumb animals) within his sphere. Whoever had any claim
upon his affectionate heart, whether as an old dependant, or as a
relation or<span class="pagenum" id="Page_10">[Pg 10]</span> friend, might command from him any amount of patient
thought, and of pains given without stint and without complaint. His
“<i>judiciosity</i>” was used as freely for them as for himself.<a id="FNanchor_7" href="#Footnote_7" class="fnanchor">[7]</a> And
where need was he could be an effectual peacemaker.</p>

<p>He was assiduous also in county business (road meetings, prison boards,
and the like), and in his own quiet way took his share in political
movements, on the Conservative side.</p>

<p>There was a deep unobtrusive tenderness in him, which in later years
gave a touching, almost feminine, grace to his ample countenance, and
his portly, even somewhat unwieldy, frame.<a id="FNanchor_8" href="#Footnote_8" class="fnanchor">[8]</a> He was a keen sportsman
(unlike his son in this), and an excellent shot; but it was observed
that he was above all careful never to run the risk of wounding without
killing his game.</p>

<p>His temper was all but perfect; yet, as “the best laid schemes o' mice
and men gang aft agley,” the minute care with which he formed his plans
sometimes exposed him to occasions which showed that his usual calm
self-possession was not invulnerable. At such times he would appear
not angry, only somewhat discomposed or “vexed,” and, after donning
his considering-cap for a little while, would soon resume his benign
equanimity.</p>

<p><span class="pagenum" id="Page_11">[Pg 11]</span></p>

<figure class="figcenter width500" id="i_036" style="width: 500px;">
<img src="images/i_036.jpg" width="500" height="522" alt="An
engraved portrait of a balding, middle-aged or older man with wavy
shoulder-length hair, depicted in formal attire with a high collar and
large bow tie.">
<figcaption class="caption">
<p>John Clerk Maxwell, “Æt. 66”. Engraved by G.J. Stodart
after Sir John Watson Gordon, R.A.</p></figcaption>
</figure>

<p>An interesting trait is revealed to us by the Diary. Minute as the
entries are for day after day, things which, if mentioned, might
reflect unfavourably upon others, are invariably omitted. They have
come down through other channels, but in this scrupulous record they
have left no trace.</p>

<p>His otherwise happy life was crossed with one deep, silent sorrow,—but
was crowned with one long comfort in the life of his son. They were
bound together by no ordinary ties, and were extremely like in
disposition, in simplicity, unworldliness, benevolence, and kindness to
every living thing. Those who knew Maxwell best will be least apt to
think irrelevant this somewhat lengthy description of his father.</p>

<p>The portrait of Mr. John Clerk Maxwell by Watson Gordon is a faithful
representation of a face which returns more vividly than most others to
the eye of memory, but no portrait can restore “the busy wrinkles round
his eyes,” or give back to them their mild radiance—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent9">“Gray eyes lit up</div>
    <div class="verse indent0">With summer lightnings of a soul</div>
    <div class="verse indent2">So full of summer warmth, so glad,</div>
    <div class="verse indent0">So healthy, sound and clear and whole,</div>
    <div class="verse indent2">His memory scarce can make me sad.”</div>
  </div>
</div>
</div>

<p>He lived amidst solid realities, but his vision was neither shallow
nor contracted. And his sense of things beyond, if inarticulate, was,
in later life at least, not the less serious and profound. Yet those
who shall compare this likeness with the study of James Clerk Maxwells
head by Mrs. Blackburn, may at<span class="pagenum" id="Page_12">[Pg 12]</span> once detect something of the difference
between the father and the son. In the one there is a grave and placid
acquiescence in the nearer environment, the very opposite of enthusiasm
or mysticism; in the other, the artist has succeeded in catching the
unearthly look which often returned to the deep-set eyes under the
vaulted brow, when they had just before been sparkling with fun,—the
look as of one who has heard the concert of the morning stars and the
shouting of the Sons of God.</p>

<p>James himself has said to me that to have had a wise and good parent
is a great stay in life, and that no man knows how much in him is
due to his progenitors. And yet the speculative ideal element which
was so strong in him—the struggle towards the infinite through the
finite—was not prominent in either of his parents. Mrs. Clerk Maxwell
was, no doubt, a good and pious (not bigoted) Episcopalian; but, from
all that appears, her chief bent, like that of her husband, must have
been practical and matter-of-fact. Her practicality, however, was
different from his. She was of a strong and resolute nature,—as prompt
as he was cautious and considerate,—more peremptory, but less easily
perturbed. Of gentle birth and breeding, she had no fine-ladyisms, but
with blunt determination entered heart and soul into that rustic life.
It is told of her that when some men had been badly hurt in blasting at
a quarry on the estate, she personally attended to their wounds before
a surgeon could be brought, and generally that wherever help was needed
she was full of courage and resource. She<span class="pagenum" id="Page_13">[Pg 13]</span> was very intelligent and
ingenious, played well on the organ, and composed some music, but in
other respects was less “accomplished” than most of her family, except
in domestic works, and above all in knitting, which in those days was
an elegant and most elaborate pursuit.</p>

<p>Her father, E. Hodshon Cay, Esq., of N. Charlton, is thus spoken of
in Lockhart’s <i>Life of Scott</i> (p. 86 of the abridged edition,
1871):—“I find him” (Scott) “further nominated in March 1796, together
with Mr. Robert Cay,—an accomplished gentleman, afterwards Judge of
the Admiralty Court in Scotland,—to put the Faculty’s cabinet of
medals in proper arrangement.” Mr. Cay at one time held the post of
Judge-Admiral and Commissary-General, and while thus dignified in his
profession used to reside for part of the year on his hereditary estate
of Charlton, which had been freed from certain burdens<a id="FNanchor_9" href="#Footnote_9" class="fnanchor">[9]</a> upon his
coming of age.</p>

<p>He married Elizabeth Liddell, daughter of John Liddell, Esq., of
Tynemouth, about the year 1789. The eldest son, John, has been already
mentioned as an early companion of John Clerk Maxwell’s, and both his
name and those of Jane and E. D. Cay will reappear in the sequel.
Between Frances (Mrs. Clerk Maxwell) and her sister Jane, who was never
married, there existed a very close affection. There is a picture of
them both as young girls (a three-quarter length in water-colours) done
by their mother, who was an accomplished artist. Her gift in<span class="pagenum" id="Page_14">[Pg 14]</span> this
way, which was very remarkable, and highly cultivated for an amateur,
was continued in Jane and Robert, and has been transmitted to the
succeeding generation. Miss Jane Cay was one of the warmest hearted
creatures in the world; somewhat wayward in her likes and dislikes,
perhaps somewhat warm-tempered also, but boundless in affectionate
kindness to those whom she loved. Mr. E. D. Cay, W.S., married a
sister of Dyce the artist, and, after acting for some time as one of
the Judges' clerks, proceeded in 1844 to Hong-Kong, where he had an
appointment. His wife joined him there in 1845, and died in 1852. In
two of their sons, besides the artistic tastes which they inherited
through both parents, there was developed remarkable mathematical
ability. It should be also noticed that Mr. John Cay, the Sheriff of
Linlithgow, though not specially educated in mathematics, was extremely
skilful in arithmetic and fond of calculation as a voluntary pursuit.
He was a great favourite in society, and full of general information.
We have already seen him assisting at experiments which might have led
to the invention of “blowing fans,” but seem to have produced no such
profitable result. And we shall find that his interest in practical
Science was continued late in after life.<a id="FNanchor_10" href="#Footnote_10" class="fnanchor">[10]</a></p>

<p>In speaking of the Cay family it has been necessary to anticipate a
little, in order to advert to some particulars which, although later in
time, seemed proper<span class="pagenum" id="Page_15">[Pg 15]</span> to an introduction. Having departed so far from
the order of events, I may before concluding this chapter make explicit
mention of the loss which coloured the greater part of James Clerk
Maxwell's existence, by leaving him motherless in his ninth year. Mrs.
Clerk Maxwell died on the 6th of December 1839. There was extant until
after Professor Maxwell's death a memorandum or diary kept at the time
by her husband, describing the heroic fortitude which she had shown
under the pain of her disease, and of the operation by which they had
attempted to save her. Anæsthetics were then unknown. She had nearly
completed her forty-eighth year, having been born on the 25th of March
1792, and married at the age of 34 (October 4, 1826). Mr. Maxwell was
aged fifty-two at the time of his wife's death. He did not marry again.</p>

<p>We now return from this sad record to the birth of the son and heir,
which was the more welcome to the parents after the loss of their
first-born child. At this joyful epoch Mr. and Mrs. Clerk Maxwell,
though retaining the house in India Street, had been already settled
for some years in their new home at Glenlair.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_1" href="#FNanchor_1" class="label">[1]</a> 
See below, <a href="#Page_16">pp. 16</a>-<a href="#Page_23">23.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_2" href="#FNanchor_2" class="label">[2]</a> 
He is said to have played well on the bagpipes, and a
set of pipes was until recently preserved at Glenlair, of which the
following singular story was told:—Captain James Clerk was wrecked in
the Hooghly and swam ashore, using the bag of his pipes for a float;
and when he gained the shore he “played an unco’ fit,” whereby he not
only cheered the survivors, but frightened the tigers away.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_3" href="#FNanchor_3" class="label">[3]</a> 
The note appended to this chapter contains a sketch of the
family history of the Clerks and Maxwells, which those who believe in
heredity, as Maxwell did, will do well to read.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_4" href="#FNanchor_4" class="label">[4]</a> 
He never lost an opportunity of inspecting manufactures,
or of visiting great buildings, ecclesiastical or otherwise, and he
impressed the same habit upon his son. The “works” they “viewed”
together were simply innumerable, but it will be sufficient to cite
one crowning instance. When James Clerk Maxwell was in the midst of
his last year’s preparation for the Cambridge Tripos, he proposed to
spend the few days of Easter vacation which the pressure of his work
allowed to him, in a visit to a friend at Birmingham. His father had
seen Birmingham in his youth, and gave him the following instructions,
which were mostly carried out:—“View, if you can, armourers,
gunmaking and gunproving—swordmaking and proving—<i>Papier-mâché</i>
and japanning—silver-plating by cementation and rolling—ditto,
electrotype—Elkington’s works—Brazier’s works, by founding and
by striking out in dies—turning—spinning teapot bodies in white
metal, etc.—making buttons of sorts, steel pens, needles, pins, and
any sorts of small articles which are curiously done by subdivision
of labour and by ingenious tools—glass of sorts is among the works
of the place, and all kinds of foundry works—engine-making—tools
and instruments—optical and [philosophical], both coarse and fine.
If you have had enough of the town lots of Birmingham, you could
vary the recreation by viewing Kenilworth, Warwick, Leamington,
Stratford-on-Avon, or such like.” James began with the glassworks.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_5" href="#FNanchor_5" class="label">[5]</a> 
In 1831 he contributed to the <i>Edinburgh Medical
and Philosophical Journal</i> (vol. <span class="allsmcap">X</span>.) a paper entitled,
“Outlines of a Plan for combining Machinery with the Manual Printing
Press.” His acme of festivity was to go with his friend John Cay (the
“partner in his revels”), to a meeting of the Edinburgh Royal Society.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_6" href="#FNanchor_6" class="label">[6]</a> 
The following entry from the Diary (1842) will be
appreciated by those who are interested in the country life of a past
generation:—“Wrote to Nanny about check of the yarn of the dead Hogs,
to make trowser stuff or a plaid.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_7" href="#FNanchor_7" class="label">[7]</a> 
Mr. Colin Mackenzie says:—“He was the confidential friend
of his widowed sister Mrs. Wedderburn’s children, who were in the habit
of referring to him in all their difficulties in perfect confidence
that he would help them, and regarded him more as an elder brother than
anything else.” This is abundantly confirmed by various entries in the
Diary.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_8" href="#FNanchor_8" class="label">[8]</a> 
Entry in Diary, Nov. 9, 1844.—Weighed 15 st. 7 lbs.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_9" href="#FNanchor_9" class="label">[9]</a> 
Incurred by his father in successfully resisting some
manorial claims. These debts had brought the family to Edinburgh.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_10" href="#FNanchor_10" class="label">[10]</a> 
It should be remembered that in the early years of the
century considerable interest in experimental science had been awakened
in Edinburgh through the teaching of Professors Playfair and Hope.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_16">[Pg 16]</span></p>

<h2 class="nobreak" id="NOTE">NOTE.<br>
<span class="allsmcap">THE CLERKS OF PENICUIK AND MAXWELLS OF MIDDLEBIE.</span></h2>
</div>

<p class="nind">
MISS ISABELLA CLERK, of 3 Hobart Place, London, has kindly
furnished me with the following statement, to which I have added
some annotations. These are chiefly derived from a book of autograph
letters, which was long kept at Glenlair, and is now in the possession
of Mrs. Maxwell.</p>

<div class="blockquot">

<p>“The Clerks of Penicuik are descended from John Clerk, of Kilhuntly,
in Badenoch, Aberdeenshire, who attached himself to the party of Queen
Mary, and had to leave that part of the country in 1568 during the
troubles. His son, William Clerk, was a merchant in Montrose; he lived
in the reigns of Mary and James the Sixth, and died in 1620.</p>

<p>“John Clerk, his son, was a man of great ability. He went to Paris in
1634, and having acquired a large fortune there in commerce, returned
to Scotland in 1646, and bought the barony of Penicuik, and also the
lands of Wright’s Houses. He married Mary, daughter of Sir William
Gray, of Pittendrum. This lady brought the necklace of Mary Queen of
Scots into the family, through her mother, Mary Gillies, to whom it was
given by Queen Mary before her execution. He died in 1674. His eldest
son John was created a Baronet of Nova Scotia in 1679.”</p>
</div>

<p>This Sir John Clerk (the first baronet) records a singular affray
with sixteen robbers who attacked the house of Penicuik in 1692. He
kept them at bay until the neighbouring tenants came to his relief.
His pluck, sagacity, presence of mind, good feeling, and piety, are
conspicuous in the narrative.</p>

<p><span class="pagenum" id="Page_17">[Pg 17]</span></p>

<div class="blockquot">

<p>“He served in the Parliament of Scotland, and acquired the lands and
barony of Lasswade. He married Elizabeth, daughter of Henry Henderson,
Esq., of Elvington, and grand-daughter of Sir William Drummond, of
Hawthornden, the poet. Sir William Drummond had only two daughters,
the younger of whom married W. Henderson. Their daughter Elizabeth
was wonderfully talented and accomplished, and had a special gift for
music. Sir John died in 1722. He was succeeded by his eldest son, Sir
John Clerk, a man of great learning, who was appointed in 1707 one of
the Barons of the Exchequer in Scotland, which judicial employment
he retained during the remainder of his life. He was also one of the
Commissioners of the Union.”</p>
</div>

<p>The Baron’s precepts to his son George when at school in Cumberland are
worthy of Polonius. He advises him to be kind to his companions, as he
could not tell what they might be able to do for him thereafter, and to
be sure to take the opportunity of “learning the English language,” in
which the Baron himself regrets his own deficiency. “You have nothing
else to depend on but your being a scholar and behaving well.” He is
described in the autumn of his days as “humming along and stuffing his
pipe in order to whiff it away for half an hour,” while “my lady is
engaged reading over some newspaper. Miss Clerk is labouring with great
industry at a very pretty open muffler. Mrs. Dean is winding three
fine white clews upon a fourth one,” etc. “My lady’s” letters to her
son George dwell much on family matters, and are full of old-fashioned
piety.</p>

<div class="blockquot">
<p>“He was highly accomplished in music, painting, and languages. At the
age of nineteen he went abroad for three years to finish his education.
He studied one year under the celebrated Dr. Boerhaave at Leyden, where
he was a pupil of William Mieris in drawing. He afterwards went to
Florence and Borne, where he had lessons in music from Antonio Corelli,
and in painting from Imperiale. He wrote an opera which was performed
in Borne. His brother, William Clerk, married Agnes Maxwell, heiress of
Middlebie, in Dumfriesshire.”</p>
</div>

<p><span class="pagenum" id="Page_18">[Pg 18]</span></p>

<p>William also was at Leyden before going into business as a lawyer,
and kept a journal of his tour in Holland, which, like other writings
of the Clerk family, is furnished with pen and ink sketches of what
he saw. His letters are interesting from the combination of earnest,
Covenanting piety, with a gay and chivalrous bearing in what was
evidently the one serious love-passage of his life. His letters to his
wife in the years after their marriage are as full of tenderness as
that in which he makes his first proposal is instinct with old-world
gallantry.</p>

<div class="blockquot">

<p>“They left an only daughter, Dorothea, who married her first cousin,
afterwards Sir George Clerk Maxwell.”</p>
</div>

<p>This George Clerk Maxwell probably suffered a little from the world
being made too easy for him in early life. Such a misfortune was all
but inevitable, and the Baron seems to have done his best to obviate
it by good counsel; but the current of circumstances was too strong.
George was in the habit of preserving letters, and from those received
by him before succeeding to Penicuik it is possible to form a tolerably
full impression of the man. In some respects he resembled John Clerk
Maxwell, but certainly not in the quality of phlegmatic caution.
His imagination seems to have been dangerously fired by the “little
knowledge” of contemporary science which he may have picked up when at
Leyden with his elder brother James (see p. 19, II. 18, 25). We find
him, while laird of Dumcrieff, near Moffat, practically interested in
the discovery of a new “Spaw,” and humoured in this by his friend Allan
Ramsay, the poet:—by and by he is deeply engaged in prospecting about
the Lead Hills, and receiving humorous letters on the subject from his
friend Dr. James Hutton, one of the founders of geological science,
and author of the <i>Theory of the Earth</i>.<a id="FNanchor_11" href="#Footnote_11" class="fnanchor">[11]</a> After a while he has
commenced active operations, and is found making fresh proposals to
the Duke of Queensberry. Then to the mines there is added some talk
of<span class="pagenum" id="Page_19">[Pg 19]</span> a paper manufactory, and the Duchess playfully “congratulates” his
“good self on every new sprouting up manufacture by means of so good a
planter and planner.” But by this time it has been found advisable to
add to his studies some more certain source of income, and he applies
for the Postmastership, and (through the Duke of Q.) obtains an office
in the Customs. In this, as in all relations of life, he seems to
have won golden opinions. And ere he succeeded to Penicuik, the loss
of Middlebie proper and Dumcrieff had doubtless taught the lesson
of prudence which his father the Baron had vainly tried to impress
upon his youth. The friendship of Allan Ramsay and the affectionate
confidence of the “good Duke and Duchess of Queensberry,” sufficiently
indicate the charm which there must have been about this man.</p>

<div class="blockquot">

<p>“Sir John Clerk (the Baron of Exchequer) married Janet Inglis of
Cramond, and was succeeded by his eldest son, Sir James Clerk, in 1755.
Sir James died without children in 1782, and was succeeded by his
next brother, Sir George Clerk, who had married his cousin, Dorothea
Maxwell, heiress of Middlebie.”</p>
</div>

<p>The betrothal of George Clerk and Dorothea Clerk Maxwell is said by
the Baron (in a special memorandum) to have been in accordance with
her mother’s dying wish. (Dorothea was seven years old when Agnes
Maxwell died!) They were married privately when he was twenty and she
was seventeen, but “as they were too young to live together,” he was
sent to join his brother James at Leyden. After a short interval the
marriage was declared, and they lived very happily at Dumcrieff.</p>

<div class="blockquot">

<p>“Sir George Clerk Maxwell was a Commissioner of Customs, and a trustee
for the improvement of the fisheries and manufactures of Scotland. His
brother, John Clerk of Eldin, was the author of the well-known work on
<i>Naval Tactics</i>. He was the father of John Clerk, a distinguished
lawyer in Edinburgh, afterwards Lord Eldin, a Lord of Session.”</p>
</div>

<p><span class="pagenum" id="Page_20">[Pg 20]</span></p>

<p>The following account of Mr. Clerk of Eldin is from the above-mentioned
biographical notice of Dr. James Hutton:—<a id="FNanchor_12" href="#Footnote_12" class="fnanchor">[12]</a></p>

<div class="blockquot">

<p>“Mr. Clerk of Eldin was another friend with whom, in the formation
of his theory, Dr. Hutton maintained a constant communication. Mr.
Clerk, perhaps from the extensive property which his family had in
the coal-mines near Edinburgh, was early interested in the pursuit of
mineralogy. His inquiries, however, were never confined to the objects
which mere situation might point out, and through his whole life has
been much more directed by the irresistible impulse of genius, than
by the action of external circumstances. Though not bred to the sea,
he is well known to have studied the principles of naval war with
unexampled success; and, though not exercising the profession of
arms, he has viewed every country through which he has passed with
the eye of a soldier as well as a geologist. The interest he took
in studying the surface no less than the interior of the earth; his
extensive information in most branches of natural history; a mind
of great resource and great readiness of invention; made him to Dr.
Hutton an invaluable friend and coadjutor. It cannot be doubted that,
in many parts, the system of the latter has had great obligations to
the ingenuity of the former, though the unreserved intercourse of
friendship, and the adjustments produced by mutual suggestion, might
render those parts undistinguishable, even by the authors themselves.
Mr. Clerk’s pencil was ever at the command of his friend, and has
certainly rendered him most essential service.”</p>
</div>

<p>In another place the same writer says:—</p>

<div class="blockquot">

<p>“Some excellent drawings were made by Mr. Clerk, whose pencil is not
less valuable in the sciences than in the arts.”<a id="FNanchor_13" href="#Footnote_13" class="fnanchor">[13]</a></p>
</div>

<p>John Clerk, Esq., of Eldin, fifth son of Sir John Clerk of Penicuik,
and brother of Sir George, the grand-father of John Clerk Maxwell,
was the author of certain suggestions on Naval Tactics, which had
the credit of contributing to the victory<span class="pagenum" id="Page_21">[Pg 21]</span> gained over the French by
Lord Rodney’s fleet off Dominique in 1782. It is fair to add that
Sir C. Douglas claimed to have independently hit on the new method
of “breaking the enemy’s line.” But John Clerk never relinquished
his pretensions to the merit of the discovery, and his book on Naval
Tactics in the edition of 1804<a id="FNanchor_14" href="#Footnote_14" class="fnanchor">[14]</a> is a thick octavo volume, with
many woodcut illustrations and diagrams. He used to sail his mimic
navies, trying various combinations with them, on the fish-ponds at
Penicuik.<a id="FNanchor_15" href="#Footnote_15" class="fnanchor">[15]</a> His eldest son, John Clerk, afterwards Lord Eldin of
the Court of Session, made a vivid and lasting impression on his
contemporaries, and many anecdotes of legal shrewdness and caustic
wit still live about his name.<a id="FNanchor_16" href="#Footnote_16" class="fnanchor">[16]</a> A graphic description of him as
the Coryphæus of the Scottish Bar occurs in <i>Peter's Letters to his
Kinsfolk</i>, Letter xxxii.<a id="FNanchor_17" href="#Footnote_17" class="fnanchor">[17]</a> Quite recently he has appeared again in
Carlyle’s <i>Reminiscences</i>,<a id="FNanchor_18" href="#Footnote_18" class="fnanchor">[18]</a> as the one figure in the Edinburgh
law-courts, which remained clearly imprinted on the historian’s
imagination.</p>

<p>Lord Eldin’s younger brother, William Clerk, was the trusted<span class="pagenum" id="Page_22">[Pg 22]</span> friend
and comrade of young Walter Scott. And it may be observed here, by the
way, that the friend of both, John Irving, was half-brother to Mrs.
Clerk, John Clerk Maxwell’s mother.<a id="FNanchor_19" href="#Footnote_19" class="fnanchor">[19]</a></p>

<div class="blockquot">

<p>“Sir George Clerk Maxwell died in 1784, and was succeeded by his eldest
son, Sir John, who married Mary Dacre, but died without children in
1798. His brother James was a lieutenant in the East Indian Navy, and
married Janet Irving of Newton. He died in 1793, leaving two sons and
a daughter. The elder son, afterwards the Right Honourable Sir George
Clerk,<a id="FNanchor_20" href="#Footnote_20" class="fnanchor">[20]</a> succeeded to Penicuik on the death of his uncle. Sir John
Clerk, in 1798; and the younger son John succeeded to the property of
Middlebie, which descended to him from his grand-mother, Dorothea,
Lady Clerk Maxwell, and took the name of Maxwell. He married in 1826
Prances, daughter of Robert Cay of Charlton, and had one son, James
Clerk Maxwell, born in July 1831, and died in Nov. 1879.”</p>
</div>

<hr class="tb">

<p>The Maxwells of Middlebie are descendants of the seventh Lord Maxwell,
and, in the female line, of the Maxwells of Spedoch in Dumfriesshire.
Their early history, like that of many Scottish families, is marked
with strong lights and shadows,<a id="FNanchor_21" href="#Footnote_21" class="fnanchor">[21]</a> and John, the third laird, on
coming into his inheritance,<span class="pagenum" id="Page_23">[Pg 23]</span> found it considerably burdened. He made
a great effort to liberate the estate from encumbrances, and in 1722
was able to entail his landed property, and make it inseparable from
the name of Maxwell. But he was by no means ultimately freed from
debts, and he transmitted these, together with the estate, to his
daughter Agnes, who married William Clerk. (See p. 17.) Their daughter,
Dorothea, was left an orphan at the age of seven, and became the ward
of Baron Clerk of Penicuik, who (in accordance, as he declares, with
her mother’s wish), betrothed her to his second son George. They
were married, privately at first, in 1735; and, in order to simplify
their affairs, the Baron obtained a decree of the Court of Session,
followed by an Act of Parliament, by which (notwithstanding the
entail of 1722) Middlebie proper was sold to liquidate the Maxwell
debts, and was bought in for George Clerk, whose title was thus freed
from burdens, and, so far, from the conditions of the entail. At the
same time it was arranged that Middlebie should not be held together
with Penicuik. Whatever crafty views the Baron may have had in this
curious transaction were frustrated by the imprudence of George Clerk
Maxwell. His mining and manufacturing speculations involved him so
deeply that Middlebie proper, which, by his father’s act, was now at
his individual disposal, was sold in lots to various purchasers (of
whom the Duke of Queensberry was chief), and the hereditary estate was
reduced to something like its present limited area. This accounts for
the fact that Glenlair, the present seat of this branch of the Maxwell
family, is so far distant from the well-known town of Middlebie, in
Dumfriesshire.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_11" href="#FNanchor_11" class="label">[11]</a> 
See “Biographical Account of the late Dr. James Hutton,
F.R.S., Edinburgh,” read by Mr. Playfair, in <i>Transactions of the
Royal Society of Edinburgh</i>, vol. <span class="allsmcap">V</span>. He made a tour in the
north of Scotland in 17 64, “in company with Commissioner, afterwards
Sir George, Clerk, in which Dr. Hutton’s chief object was mineralogy,
or rather geology, which he was now studying with close attention.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_12" href="#FNanchor_12" class="label">[12]</a> 
Edinburgh Royal Society’s <i>Transactions</i>, vol.
<span class="allsmcap">V</span>., part iii., p. 97.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_13" href="#FNanchor_13" class="label">[13]</a> 
See the collection of his etchings printed for the
Bannatyne Club in 1855, with a striking portrait of him.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_14" href="#FNanchor_14" class="label">[14]</a> 
There were in all five issues, viz., in 1781, 1790, 1797,
1804, and (with notes by Lord Rodney) in 1827.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_15" href="#FNanchor_15" class="label">[15]</a> 
Miss Isabella Clerk is my authority for this.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_16" href="#FNanchor_16" class="label">[16]</a> 
It has been often told how John Clerk, in an appeal
before the House of Lords, when twitted for his pronunciation by
Lord Mansfield,—“Mr. Clerk, do you spell <i>water</i> with a double
<i>t</i>?”—replied, “Na, my laird, we spell <i>wăter</i> wi’ yae
<i>t</i>, and we spell manners wi’ twa <i>n</i>’s.” The following is
less known:—A young advocate in the Court of Session had ventured,
in the vehemence of pleading, to exclaim against some deliverance of
the Court, “My lords, I am astonished,” whereupon my lords contracted
their judicial brows. But Clerk, who by this time was one of them,
is reported to have said, “Dinna be ill at the laddie! it’s just his
inexperience. Gin he had kenned ye, my lairds, as lang as I hae, he wad
no been astonished at onything ye might dae.” It was his father who,
on the occasion of Johnson’s visit to the Parliament House, clapped a
shilling in Boswell’s hand with “Here’s till ye for the sight o’ your
Bear!”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_17" href="#FNanchor_17" class="label">[17]</a> 
“The very essence of his character is scorn of ornament.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_18" href="#FNanchor_18" class="label">[18]</a> 
Vol. <span class="allsmcap">ii.</span> p. 7. “The only figure I distinctly recollect
and got printed on my brain that night was John Clerk, there veritably
hitching about, whose grim, strong countenance, with its black,
far-projecting brows and look of great sagacity, fixed him in my
memory.... Except Clerk, I carried no figure away with me.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_19" href="#FNanchor_19" class="label">[19]</a> 
Many notices both of William Clerk and of John Irving
occur in Mr. John C. Maxwell’s Diary. The following are of some
interest:— “1846, <i>Sa.</i>, <i>Nov.</i> 5.—Called on William
Clerk, and sat a good while with him. He was in bed, and not able to
raise himself, but spoke freely and well, though very weak and thin.
His appetite quite good, and eats plenty, but gains no strength.
<i>Dec.</i> 12, <i>Sa.</i>—Called on W. Clerk, and sat 45 minutes with
him. Weak, but hearty to talk. 1847, <i>Jan.</i> 7.—Wm. Clerk died
early this morning.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_20" href="#FNanchor_20" class="label">[20]</a> 
For many years Member for Midlothian, and one of the most
prominent politicians of his day. He held office under Sir Robert Peel,
who had great confidence in the breadth and soberness of his judgment.
He was noted for his command of statistics, and of questions of weights
and measures, etc. He had also considerable skill in music, and was a
good judge of pictures.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_21" href="#FNanchor_21" class="label">[21]</a> 
The famous feud between the Maxwells and Johnstones is
celebrated in the old ballad, entitled “Lord Maxwell’s Good-night.”</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_24">[Pg 24]</span></p>

<h2 class="nobreak" id="CHAPTER_II">CHAPTER II.<br>
<span class="allsmcap">GLENLAIR—CHILDHOOD—1831 TO 1841.</span></h2>
</div>

<p class="nind">
THAT part of the old estate of Middlebie which remained to
the heirs of Maxwell was situate on the right or westward bank of the
Water of Orr, or Urr, in Kirkcudbrightshire, about seven miles from
Castle-Douglas, the market-town, ten from Dalbeattie, with its granite
quarries, and sixteen from Dumfries. It consisted chiefly of the farm
of Nether Corsock, and the moorland of Little Mochrum. But, before
building, Mr. Clerk Maxwell by exchange and purchases had added other
lands to these, including the farm of Upper Glenlair. The site chosen
for the house was near to the march of the original estate, where a
little moor-burn from the westward falls into the Urr. The two streams
contain an angle pointing south-east, opposite the heathery brae which
hides the village of Kirkpatrick Durham. There, on a rising ground
above the last descent towards the river and the burn, a mansion-house
of solid masonry, but of modest dimensions, had been erected. It was
built of dark-gray stone, with a pavement and a “louping-on-stane”
of granite before the front door. On the southward slope, towards
the burn, was a spacious garden-ground and a plantation beyond it,
occupying the den or<span class="pagenum" id="Page_25">[Pg 25]</span> dingle on either side the burn, and coming round
to westward of the house and garden, where it ended in a shrubbery, by
which the house was approached from the north. On the eastward slope,
towards the Water of Urr, was a large undivided meadow for the “kye”
and the ponies. To the northward was a yard with a duck-pond, and some
humble “offices” or farm-buildings, which were displaced by the new
erection of 1843. At the foot of the meadow, near the mouth of the
burn, was a ford with stepping-stones, where the bridge was afterwards
to be built, and the regular approach to the completed house was to
be constructed. But this was far in the future, for in his building
projects the laird would not trench upon the resources that were needed
for the land. At the foot of the garden a place was hollowed out in
the bed of the burn, which has often proved convenient for bathing.
The rocky banks of the Urr, higher up, were fringed with wood, and on
the upland, on either side the moor, there were clumps of plantation,
giving cover to the laird's pheasants, and breaking the force of the
winds coming down from the hill of Mochrum (N.W.). Glenlair was the
name ultimately appropriated to the “great house” of Nether Corsock.</p>

<p>Every detail of these arrangements had been planned by the laird
himself, and may be said to have been executed under his immediate
supervision. The house was so placed and contrived as to admit of
enlargement; but, in the first erection of it, space was economised as
in the fitting up of a ship. And while it was building, the owners were
contented with still<span class="pagenum" id="Page_26">[Pg 26]</span> narrower accommodation, spending one if not two
whole summers in what was afterwards the gardener's cottage. For the
journey from Edinburgh was no light matter, even for so experienced a
traveller as John Clerk Maxwell. Coming by way of Beattock, it occupied
two whole days, and some friendly entertainment, as at the Irvings of
Newton (his mother's half-sisters),<a id="FNanchor_22" href="#Footnote_22" class="fnanchor">[22]</a> had to be secured on the way.
Carriages, in the modern sense, were hardly known to the Yale of Urr.
A sort of double-gig with a hood was the best apology for a travelling
coach, and the most active mode of locomotion was in a kind of rough
dog-cart, known in the family speech as a “hurly.” A common farmer's
cart has been seen carrying the laird to church, or to a friend's
hall-door.</p>

<p>Glenlair was in the parish of Parton, of which the kirk is by Loch Ken.
Mr. Clerk Maxwell was one of the elders there. (The little church of
Corsock, about three miles up the Urr, was not yet thought of; for it
was built in 1838, and not completely endowed until 1862.) About seven
miles of hilly road lead from the Urr to Loch Ken and the Dee, which
is reached at a point near Cross-Michael, about half-way between New
Galloway in one direction and Kirkcudbright and St. Mary’s Isle<a id="FNanchor_23" href="#Footnote_23" class="fnanchor">[23]</a> in
the other. On the high ground between the Urr and the Dee is Loch Roan,
a favourite point for expeditions from Glenlair.</p>

<div class="sidenote"><i>Æt</i> 2 yrs.
10 mo.</div>

<p>In a letter dated “Corsock, 25th April 1834” (the Boy being then aged
two years and ten months),<span class="pagenum" id="Page_27">[Pg 27]</span> Mr. Clerk Maxwell writes to Jane Cay, his
sister-in-law, in Edinburgh:—</p>

<div class="blockquot">

<p class="nindc">
<span class="allsmcap">To Miss Cay</span>, 6 Great Stuart Street, Edinburgh.</p>

<p class="right"><i>Corsock</i>, 25th April 1834.</p>

<p>This has been a great day in Parton. Your humble servant and his better
half, Ned,<a id="FNanchor_24" href="#Footnote_24" class="fnanchor">[24]</a> and Davie took their departure an hour and a half after
screigh<a id="FNanchor_25" href="#Footnote_25" class="fnanchor">[25]</a> for Parton, to appropriate the seats of the new kirk, which
was successfully achieved in four hours’ work to the satisfaction of
all concerned, by a grand assemblage of the Magnates of the Parochin,
who adjourned to a feast at the Manse. Master James is in great go, but
on this subject I must surrender the pen to abler hands to do justice
to the subject.</p>
</div>

<p>Instead of attempting to paraphrase a mode of speech which must be
studied in and for itself, I will now give the continuation, written on
the same sheet of paper by the “abler pen.”</p>

<div class="blockquot">

<p>He is a very happy man, and has improved much since the weather got
moderate; he has great work with doors, locks, keys, etc., and “Show me
how it doos” is never out of his mouth. He also investigates the hidden
course of streams and bell-wires, the way the water gets from the pond
through the wall and a pend or small bridge and down a drain into Water
Orr, then past the smiddy and down to the sea, where Maggy’s ships
sail. As to the bells, they will not rust; he stands sentry in the
kitchen, and Mag runs thro’ the house ringing them all by turns, or he
rings, and sends Bessy to see and shout to let him know, and he drags
papa all over to show him the holes where the wires go through. We went
to the shop and ordered hats and bonnets, and as he was freckling with
the sun I got him a black and white straw till the other was ready, and
as an apology to Meg<span class="pagenum" id="Page_28">[Pg 28]</span> said it would do to toss about; be beard me, and
acts accordingly. His great delight is to help Sandy Frazer with the
water barrel. I sent the fine bat to Mrs. Crosbie<a id="FNanchor_26" href="#Footnote_26" class="fnanchor">[26]</a> for her babe,
which is well bestowed.... You would get letters and violets by a woman
that was going back to her place; the latter would perhaps be rotten,
but they were gathered by James for Aunt Jane.</p>
</div>

<p>Not much dragging was needed, either then or afterwards, to get Mr.
Clerk to explain any mechanism to “boy,” and “show him how it doos.”
Henceforward this was the chief pleasure of his life, until the order
was reversed, and the son took hardly less delight in explaining
Nature’s Mechanics to the father.</p>

<p>Before seeing this letter, I had been told by his cousin, Mrs.
Blackburn, that throughout his childhood his constant question was,
“What’s the go o’ that? What does it do?” Nor was he content with a
vague answer, but would reiterate, “But what’s the <i>particular</i>
go of it?” And, supported by such evidence, I may hope to win belief
for a reminiscence which I might else have shrunk from mentioning. I
distinctly remember his telling me, during his early manhood, that his
first recollection was that of lying on the grass before his father’s
house, and looking at the sun, and <i>wondering</i>. To which may be
added the following anecdote, which has been communicated to me by
Mrs. Murdoch,<a id="FNanchor_27" href="#Footnote_27" class="fnanchor">[27]</a> the “Meg” of the preceding letter. “When James was a
little boy of two years and a half old, I had given him a new tin plate
to play with.</p>

<p><span class="pagenum" id="Page_29">[Pg 29]</span></p>

<figure class="figcenter width500" id="i_056" style="width: 500px;">
<img src="images/i_056.jpg" width="500" height="678"
alt="An engraved portrait of a woman in
early 19th-century dress, wearing a ruffled bonnet, tenderly holding a
curly-haired young child in her arms.">
<figcaption class="caption">
<p>Mrs. Clerk Maxwell and 'Boy'. Engraved by G.J. Stodart
after William Dyce, R.A.</p></figcaption>
</figure>


<p class="nind">
It was a bright sunny day; he held it to the sun, and the reflection
went round and round the room. He said ‘Do look, Maggy, and go for papa
and mamma.’ I told them both to come, and as they went in James sent
the reflection across their faces. It was delightful to see his papa;
he was delighted. He asked him, ‘What is this you are about, my boy?’
He said, ‘It is the sun, papa; I got it in with the tin plate.’ His
papa told him when he was a little older he would let him see the moon
and stars, and so he did.” Methinks I see the laird in those happiest
days, standing on some moonlit night on the pavement at the door,
pointing skywards with one hand, while the small astronomer is peering
from a plaid upon the other arm, and the glad wife is standing by.<a id="FNanchor_28" href="#Footnote_28" class="fnanchor">[28]</a></p>

<p>In Mr. Dyce’s picture of the mother and child we see this open-eyed
loving intercourse with the visible universe already begun. And in
the accompanying woodcut (p. 30), taken from a contemporary sketch of
a “barn ball” at the Harvest-home of 1837, the boy of six years old
(instead of looking at the dancer) is totally absorbed in watching
the bow of the “<i>violino primo</i>” unshakably determined to make
out “the go of that” some day or other. The spirit which afterwards<span class="pagenum" id="Page_30">[Pg 30]</span>
welcomed the acoustic discoveries of Helmholtz was already at work.<a id="FNanchor_29" href="#Footnote_29" class="fnanchor">[29]</a></p>

<figure class="figcenter width500" id="i_058" style="width: 400px;">
<img src="images/i_058.jpg" width="400" height="242" alt="A simple
line-drawing illustration of a man dancing energetically in the center
of a room, surrounded by seated groups of men, women, and children
watching from both sides.">
<figcaption class="caption">
<p>Kirn 1837</p></figcaption>
</figure>


<p>In still earlier childhood, when he returned from walking with his
nurse, she had generally a lapful of curiosities (sticks, pebbles,
grasses, etc.) picked up upon the paths through the wood, which must be
stored upon the kitchen dresser till his parents had told him all about
each one. In particular, she remembers<span class="pagenum" id="Page_31">[Pg 31]</span> his interest in colours—“that
(sand) stone is red; this (whin) stone is blue.” “But how d'ye know
it's blue?” he would insist. He would catch insects and watch their
movements, but would never hurt them. His aunt, Miss Cay, used to
confess that it was humiliating to be asked so many questions one could
not answer “by a child like that.”</p>

<p>But the child was not always observing, or asking questions. Ever and
anon he was engaged in <i>doing</i>, or in <i>making</i>, which he
liked better still. And here his inventiveness soon showed itself.</p>

<figure class="figcenter width500" id="i_059" style="width: 300px;">
<img src="images/i_059.jpg" width="300" height="283" alt="A
line-drawing illustration of three seated figures gathered closely
around a lit candle, each appearing to hold or examine something small
in their hands.">
</figure>

<p class="nind">He was not long contented with “tossing his hat about,” or fishing
with a stick and a string (as in an early picture of Miss Cay's); but
whenever he saw anything that demanded constructive ingenuity in the
performance, that forthwith took his fancy, and he must work at it. And
in the doing it, it was ten to one but he must give it some new and
unexpected turn, and enliven it with some quirk of fancy. At one time
he is seated on the kitchen table, busily engaged in basket-making, in<span class="pagenum" id="Page_32">[Pg 32]</span>
which all the domestics, probably at his command, are also employed.
At another he is “making seals”<a id="FNanchor_30" href="#Footnote_30" class="fnanchor">[30]</a> with quaint devices, or improving
upon his mother’s knitting. For he must early have attained the skill,
of which an elaborate example still exists, in “Mrs. Wedderburn’s
Abigail,” which will be described in the next chapter, and was worked
by him in his twelfth year.</p>

<p>Of his education in the narrower sense during this period little is
known, except that his mother had the entire charge of it until her
last illness in 1839, and that she encouraged him to “look up through
Nature to Nature’s God.”<a id="FNanchor_31" href="#Footnote_31" class="fnanchor">[31]</a> She seems to have prided herself upon
his wonderful memory, and it is said that at eight years old he could
repeat the whole of the 119th Psalm. His knowledge of Scripture, from
his earliest boyhood, was extraordinarily extensive and minute; and he
could give chapter and verse for almost any quotation from the Psalms.
His knowledge of Milton also dates from very early times. These things
were not known merely by rote. They occupied his imagination, and sank
deeper than anybody knew.</p>


<p class="space-above2">
But his most obvious interests were naturally out of doors. To follow
his father “sorting” things about the farm, or “viewing” recent
improvements; by and<span class="pagenum" id="Page_33">[Pg 33]</span> by (at ten years old) to ride his pony after his
father’s phaeton; to learn from the men “how to pickfork the sheaves
into the cart,”<a id="FNanchor_32" href="#Footnote_32" class="fnanchor">[32]</a> to witness a ploughing-match, to slide on the Urr
in time of frost (January 7, 1841), to leap ditches, to climb trees
“of sorts,” to see them felled and “have grand game at getting upon
them when falling,”<a id="FNanchor_33" href="#Footnote_33" class="fnanchor">[33]</a> to take wasps’ nests on hot days in July;<a id="FNanchor_34" href="#Footnote_34" class="fnanchor">[34]</a>
to blow soap bubbles and marvel at their changing hues; to scramble up
the bed of the eddying stream that “flowed past the smiddy to the sea,”
and mark the intricate tracery of holes and grooves which, in rolling
the shingle, it had worn and carved in the hard rock; or to watch the
same river in a “spate” rushing and whirling over those “pots” which it
had wrought, and piling up the foam into mimic towers, like the cumuli
of the sky; or to gaze into the wan water when in a milder mood, and
drink in the rich brown colour tinged with green reflections from the
trees;—such were some of his delights, as, I may confidently infer
from what he loved to show me afterwards. For in that constant soul the
impression once made was that which remained and went on deepening—“as
streams their channels deeper wear.” I well remember with what feeling
he once repeated to me the lines of Burns—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“The Muse, nae poet ever fand her,</div>
    <div class="verse indent0">Till by himsel he learn’d to wander;</div>
    <div class="verse indent0">Adown some trottin’ burn’s meander,</div>
    <div class="verse indent2">An’ no think lang.”<a id="FNanchor_35" href="#Footnote_35" class="fnanchor">[35]</a></div>
  </div>
</div>
</div>
<p><span class="pagenum" id="Page_34">[Pg 34]</span></p>
<p>There were living companions of his solitude, besides those at home,
for no live thing escaped his loving observation. And chief among these
was that “child of the mossy pool,” the frog,—nay, humbler still, the
tadpole. The marvel of that transformation has engrossed many a child;
but in none, unless in some great naturalist, has it awakened such a
keen, continuous interest. And it may be here observed, as a trait
not to be dissociated from his intimacy with Nature, as one of her
familiars, that Maxwell never had a “horror” of any creature. “Clean
dirt” was a favourite expression, though no one was ever more cleanly.
He would pick up a young frog, handle him tenderly, as loving him (not
“as if he loved him!”), listen for his scarcely audible voice (“hear
him squeak!” he would say), put him into his mouth, and let him jump
out again! The movements of the frog in swimming were long a favourite
study, and to jump like a frog was one of the pranks with which he
astonished his companions, when he “put an antic disposition on” at
school; but of these there will be a time to speak hereafter. It was
also at a later time that he was told of Galvani’s discoveries; but the
recital had the more vivid interest for him because of this childhood
fancy.</p>

<p>With eminent “judiciosity,” Mr. Clerk Maxwell had furnished his son
with a leaping-pole. This long staff, which appears in many of the
early drawings, had at least one excellent effect. Few civilised
men have had such perfect use of hands and arms as Maxwell always
had.—His hand was the model of a hand, at<span class="pagenum" id="Page_35">[Pg 35]</span> once effective and
refined-looking.—Thus equipped, he went across country anywhere and
everywhere, with an eye for all he saw, and pluck enough to meet any
emergency. One who knew him as a child, and who is fond of animals,
says that he was extraordinarily “game.” His endurance, both physical
and mental, was always most remarkable.</p>

<p>He was sometimes taken to share in the simple daylight festivities
of the neighbourhood (perhaps also to the New Year's gathering at
Largnane, where the gifts were dispensed by a Fairy from her grotto),
and it is still remembered, how at an archery picnic,<a id="FNanchor_36" href="#Footnote_36" class="fnanchor">[36]</a> when an
elaborate pie from Glenlair was being opened by the member of another
house, the sturdy scion of Middlebie, who had not yet learned the
meaning of Erănos,<a id="FNanchor_37" href="#Footnote_37" class="fnanchor">[37]</a> and had doubtless been at the making and baking,
bounded over the cloth just laid upon the turf, and laid his hand upon
the dish, crying eagerly, “That's oor’s!” “That’s oor pie!”</p>

<p>His resources on wet days were—first, reading voraciously every
book in the house, except what his mother kept out of his reach; and
secondly, drawing, which was begun at a very early age. Not that he
ever showed the highest order of artistic talent (though his young
performances are full of spirit); but he had great accuracy of eye,
and any singular arrangement<span class="pagenum" id="Page_36">[Pg 36]</span> either of form or colour had always a
fascination for him. Besides his mother’s knitting, already mentioned,
his Aunt Jane’s Berlin-wool work, and her landscape drawings, early set
him inventing curious patterns and harmonising colours. And there were
two other frequent visitants at Glenlair, whom it is now time formally
to introduce. These were Mr. Clerk Maxwell’s sister Isabella, the widow
of James Wedderburn, Esq., at one time Solicitor-General for Scotland,
and her daughter Jemima, who was still a young girl, though somewhat
older than her cousin.</p>

<p>Mrs. Wedderburn had been an ornament of Edinburgh society in the days
of her youth, combining beauty of an elegant and piquant kind with
great sprightliness and originality, and the staunchest loyalty to her
kin. In spite of her early widowhood and of some long illnesses, she
retained much of her spirit, together with her erect, lightsome figure,
to the last, and danced a reel at James’s wedding with the utmost
sprightliness though at the age of seventy. Her daughter, now Mrs.
Hugh Blackburn, was only eight years older than her cousin James; but
her rare genius for pictorial delineation, especially of animals, was
already manifest. It is obvious how this companionship of genius must
have influenced the child’s indoor pursuits.</p>

<p>A scientific toy had recently come into vogue, an improvement on
the thaumatrope, called variously by the names “phenakistoscope,”
“stroboscope,” or “magic disc.” Instead of turning on its diameter,
as in the thaumatrope, it was made to revolve on a<span class="pagenum" id="Page_37">[Pg 37]</span> transverse axis,
before a mirror, at which the eye looked through apertures cut at equal
distances near the rim of the disc. And the figures drawn upon it were
so contrived, by being placed in carefully graduated positions, as thus
to produce the impression of a continuous movement.<a id="FNanchor_38" href="#Footnote_38" class="fnanchor">[38]</a> This was a
source of endless amusement to the two cousins, the younger generally
contriving, and in part executing, the elder giving life and spirit
to the creatures represented. Through Mrs. Maxwell’s kindness, I have
in my possession some of these early works, in which the ingenuity of
the contriver is everywhere manifest, the hand of the artist only here
and there. The cow jumping over the waxing and waning moon, the dog
pursuing the rat in and out of his hole, the circus horse, on which the
man is jumping through the hoop, have the firmness and truth of touch,
the fulness of life, familiar to the many admirers of J. B. The tumbler
under the horse’s feet; the face in which the pink and white, drawn
separately, are made to blend; the tadpole that wriggles from the egg
and changes gradually into a swimming frog; the cog-wheels moved by
the pendulum, and acting with the precision of clockwork (showing, in
fact, the working of an escapement);—these display, with less power
of execution, the quaint fancy and observation, and the constructive<span class="pagenum" id="Page_38">[Pg 38]</span>
ingenuity of the young Clerk Maxwell. There are also intricate
coloured patterns, of which the hues shift and open and close as in a
kaleidoscope. I would not venture to affirm that all these belong to
the very earliest period.<a id="FNanchor_39" href="#Footnote_39" class="fnanchor">[39]</a> But I believe that the magic disc was in
full operation before 1839, and that it has a real connection not only
with the “wheel of life,” but also with the “colour-top” of after years.</p>

<figure class="figcenter width500" id="i_066" style="width: 400px;">
<img src="images/i_066.jpg" width="400" height="328" alt="A
line-drawing illustration of an older man seated in a chair with a
cane, gesturing toward a dog that stands balanced on the back of a
kneeling child below.">
</figure>

<p>Another playmate and partaker of his whims must be remembered here.
This was a terrier of the “Mustard” kind, called Toby, Tobin, Tobs, or
Tobit, according to the moment’s humour. Toby was always<span class="pagenum" id="Page_39">[Pg 39]</span> learning some
new trick (performed for his wages of home-made biscuit after dinner),
and neither he nor James were ever tired of repeating the old ones.
To mention this is not mere trifling, for his power over animals and
perception of their ways<a id="FNanchor_40" href="#Footnote_40" class="fnanchor">[40]</a> was a permanent characteristic, and he
found a scientific use for it at a later time in inspecting the eyes of
dogs with a view to certain optical investigations.<a id="FNanchor_41" href="#Footnote_41" class="fnanchor">[41]</a></p>

<p>He does not seem to have been particularly fond of riding at an early
age, though in later life it was his favourite recreation; but at
ten years old, as has been said, he used to ride his pony behind his
father's “phaeton.”</p>

<p>Lastly, amongst the constant surroundings of the boy's early years,
the “<i>vassals</i>” must not be forgotten. Davie M'Vinnie and his
family—Sandy Fraser the gardener, and his—the Murdochs, who were the
kindred of Maggie, James's nurse,—were the objects of a continuous
kindly interest and friendly companionship, which had a genial effect
on the heart of the child. And by those of them whom I have been
able to see, he is still remembered, notwithstanding many years of
inevitable silence, with undoubting affection. The very names of the
places where they lived are suggestive of quaintness and singularity,
as were most things in the Galloway of that day, where it<span class="pagenum" id="Page_40">[Pg 40]</span> was supposed
that the devil had come after the Creation, with the riddlings of the
universe, and had begun “couping his creels” at Screels, till creel
and all fell at Criffel. Tor-holm, Tor-knows, Tor-brae, Paddock Hall,
Knock-vinney, the Doon of Urr, High Craigs of Glenlair—such were some
of the immediately surrounding names, sorting well with the homely, yet
unusual scenery, and with the picturesque Gallowegian dialect, which,
like everything that struck the boy's fancy, laid a strong and lasting
hold upon his mind.</p>

<figure class="figcenter width500" id="i_068" style="width: 300px;">
<img src="images/i_068.jpg" width="300" height="179"
alt="A line-drawing illustration of two
adults and a child seated on the ground, working together to build a
small structure out of blocks or bricks.">
</figure>

<p>In speaking of his own childish pursuits, it is impossible not to
recall the ready kindliness with which, in later life, he would devote
himself to the amusement of children. There is no trait by which
he is more generally remembered by those with whom he had private
intercourse; and, indeed, in this also it appears that the boy was
father to the man. Behold him at the age of twelve, with his father's
help, good-naturedly<span class="pagenum" id="Page_41">[Pg 41]</span> guiding the constructive efforts of a still
younger boy.<a id="FNanchor_42" href="#Footnote_42" class="fnanchor">[42]</a></p>

<p>As the months went on after Mrs. Maxwell's death, the question of
education began to press. The experiment of a tutor at home, which had
been tried in the autumn preceding that event, was continued until
November 1841, but by that time had been pronounced unsuccessful.
The boy was reported slow at learning, and Miss Cay after a while
discovered that the tutor was rough. He was probably a raw lad, who
having been drilled by harsh methods had no conception of any other,
and had failed to present the Latin grammar in such a way as to
interest his pupil. He had, in short, tried to coerce Clerk Maxwell.
Not a promising attempt! Meanwhile the boy was getting to be more
venturesome, and needed to be—not driven, but led. And it may be
conceded for the tutor’s behoof that, when once taken the wrong way,
his power of provocation must have been, from a certain point of view,
“prodigious.” A childhood without some naughtiness would be unnatural.
One evening at Glenlair, just as the maid-servant was coming in with
the tea-tray, Jamsie blew out the light in the narrow passage, and lay
down across the doorway.</p>

<p>There is one of Mrs. Blackburn’s drawings, which throws a curious
light on the situation at this juncture.<span class="pagenum" id="Page_42">[Pg 42]</span> Master James is in the
duck-pond, in a wash-tub, having ousted the ducks, to the amusement
of the young “vassals,” Bobby and Johnny, and is paddling himself
(with some implement from the dairy, belike), out of reach of the
tutor, who has fetched a rake, and is trying forcibly to bring him in.
Mr. Clerk Maxwell has just arrived upon the scene, and is looking on
complacently, though not without concern. Cousin Jemima has been aiding
and abetting, and is holding the leaping-pole, which has probably
served as a boat-hook in this case.</p>

<figure class="figcenter width500" id="i_070" style="width: 400px;">
<img src="images/i_070.jpg" width="400" height="242" alt="A
line-drawing illustration of a group of people gathered around a child
sitting in a wash-tub set on water, with a man in a top hat tending to
the tub, a dog and ducks nearby, and figures in period dress watching
from the sides.">
<figcaption class="caption">
<p>Glenlair 1841.</p></figcaption>
</figure>


<p>The achievement of sailing in the tub was one in which James gloried
scarcely less than Wordsworth's Blind Highland boy in his tortoise
shell. It is referred to in the following letter, written by the boy
of ten years old to his father, who had gone for a short visit to St.
Mary's Isle:—</p>

<p><span class="pagenum" id="Page_43">[Pg 43]</span></p>

<div class="blockquot">

<p class="right"><i>Glenlair House</i>,</p>

<p class="right">[<i>Friday</i>], <i>29th October 1841.</i></p>

<p><span class="allsmcap">Dear Papa</span>—We are all well. On Tuesday we<a id="FNanchor_43" href="#Footnote_43" class="fnanchor">[43]</a> sailed in the
tub, and the same yesterday, and we are improving, and I can make it
go without spinning;<a id="FNanchor_44" href="#Footnote_44" class="fnanchor">[44]</a> but on Wednesday they were washing, and we
could not sail, and we went to the potatoes. Yesterday they took up
the Prince Regents, and they were a good crop. Mr. —— and I went to
Maggy’s, but she was away at Brooklands, and so I came back and sailed
myself, for Nanny said Johnny was not to go in, and Bobby was away.
Fanny was there, and was frightened for me, because she thought I was
drowning, and the ducks were very tame, and let me go quite close to
them. Maggy is coming to-day to see the tubbing. I have got no more to
say, but remain, your affectionate son,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>
</div>

<p>The episode of the tutor was not a happy one. I would omit the fact,
as well as the name, were I not convinced that this first experience
of harsh treatment had effects which long remained,—not in any
bitterness, though to be smitten on the head with a ruler and have
one’s ears pulled till they bled might naturally have operated in
that direction,—but in a certain hesitation of manner and obliquity
of reply, which Maxwell was long in getting over, if, indeed, he ever
quite got over them.</p>

<p><span class="pagenum" id="Page_44">[Pg 44]</span></p>

<p>The young Spartan himself made no sign that his relations with his
tutor were otherwise than smooth. But something awakened the suspicions
of his aunt, Miss Cay,<a id="FNanchor_45" href="#Footnote_45" class="fnanchor">[45]</a> and the discovery was then made. It was
this, I believe, which finally roused Mr. Clerk Maxwell to carry into
effect what had been for some time in debate, viz. to take his son to
Edinburgh and put him to school.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_22" href="#FNanchor_22" class="label">[22]</a> 
See above, <a href="#Page_4">p. 4.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_23" href="#FNanchor_23" class="label">[23]</a> 
The seat of the Earl of Selkirk.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_24" href="#FNanchor_24" class="label">[24]</a> 
The laird’s horse.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_25" href="#FNanchor_25" class="label">[25]</a> 
<i>i.e.</i> Daybreak; but in the laird’s vocabulary, 9
<span class="allsmcap">A.M.</span></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_26" href="#FNanchor_26" class="label">[26]</a> 
Wife of the minister at Parton.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_27" href="#FNanchor_27" class="label">[27]</a> 
She was distantly connected with the Liddells (above, 
<a href="#Page_13">p. 13.</a>)</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_28" href="#FNanchor_28" class="label">[28]</a> 
There has been preserved amongst the Glenlair papers a
chart of the celestial globe, cut out into constellations, which fit
each other like the pieces of a child’s puzzle. A round hole is made
in the cardboard for every star, differing in size so as to show the
magnitude of each. The whole is executed with laborious neatness, and
it seems probable that we have here the means (whether purchased or
made at home) whereby the configuration of the starry heavens was still
further impressed on “Jamsie’s” mind.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_29" href="#FNanchor_29" class="label">[29]</a> 
From his earliest manhood his ear for music was
remarkably fine and discriminating, a fact (though in strict accordance
with “heredity”) which surprised some of those who had known him as a
boy. He has told me that he remembered a time when it was exquisitely
painful to him to hear music. This time must clearly have been
subsequent to 1837. The truth seems to be that his naturally keen
perception of sounds was interfered with by a tendency to inflammation
in the ear, which came to a crisis in his sixteenth year, but that
having outgrown this together with other signs of delicacy, his powers
in this respect also were developed with striking rapidity. On the
other hand, his shortsightedness seems hardly to have been noticed till
he was fourteen or fifteen.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_30" href="#FNanchor_30" class="label">[30]</a> 
As mentioned in his letter to Miss Cay of 18th January
1840.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_31" href="#FNanchor_31" class="label">[31]</a> 
When James, being eight years old, was told that his
mother was now in heaven, he said, “Oh, I’m so glad! Now she’ll have no
more pain.” Already his first thought was for another.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_32" href="#FNanchor_32" class="label">[32]</a> 
From a letter of J. G. M. to his aunt, Miss Cay, of 18th
January 1840 (<i>Æt.</i> 8½).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_33" href="#FNanchor_33" class="label">[33]</a> 
<i>Ibid.</i></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_34" href="#FNanchor_34" class="label">[34]</a> 
At ten years old this <i>animosus infans</i> took four in
one day.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_35" href="#FNanchor_35" class="label">[35]</a> 
From the Epistle to William Simpson, the schoolmaster of
Ochiltree, May 1785.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_36" href="#FNanchor_36" class="label">[36]</a> 
About 1838. This was graced by the presence of three
persons then in the fulness of life, who were not destined to outlive
the next fifteen years—Mrs. Clerk Maxwell, Miss Dyce, called the
Pentland Daisy (Mrs. Robert Cay), and Isabella Wedderburn (Mrs.
Mackenzie).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_37" href="#FNanchor_37" class="label">[37]</a> 
”Eρανος, <i>i.e.</i> a feast to which all contribute, and
which all share. See below, <span class="allsmcap"><a href="#CHAPTER_XII">chap. XII.</a></span></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_38" href="#FNanchor_38" class="label">[38]</a> 
This was afterwards developed into the “zoëtrope” or
“wheel of life,”—how far through suggestions of Clerk Maxwell’s, or
otherwise, I am unable to say. The lenses which perfect the illusion
were certainly added by Maxwell himself. See Problem <span class="allsmcap">XX.</span> of
Cambridge Tripos Examination, 1869, Thursday, January 7.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_39" href="#FNanchor_39" class="label">[39]</a> 
As late as Feb. 27, 1847, on a Saturday half-holiday,
when kept in by weather, he was employed with his father in making a
magic disc for a young cousin.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_40" href="#FNanchor_40" class="label">[40]</a> 
“He seemed to get inside them more than other
people.”—J. B.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_41" href="#FNanchor_41" class="label">[41]</a> 
“Coonie,” a favourite terrier in later years, had a
trick of howling unmercifully whenever the piano was played. He was
completely cured of this, and Maxwell told a friend, in his grave way,
that he had taken “Coonie” to the piano and explained to him how it
went. That was all.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_42" href="#FNanchor_42" class="label">[42]</a> 
The scene is at St. Mary’s Isle, and the younger boy
is Lord Charles Scott, then four years old (September 1843).—Mr. A.
Macmillan, the publisher, in particular, has a vivid recollection of
Maxwell’s ingenious ways of entertaining children, exhibiting his
colour-top, showing them how to make paper boomerangs, etc.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_43" href="#FNanchor_43" class="label">[43]</a> 
From the context “we” seems to include “Bobby,” one of
the young “vassals.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_44" href="#FNanchor_44" class="label">[44]</a> 
To enable him to “trim the vessel,” he had put a block
of wood in the centre. Sitting on this, and tucking his legs on either
side, he could paddle about steadily and securely. Mrs. Blackburn tells
me that years afterwards at Ruthven, in Forfarshire, being desirous
of inspecting a water-hen’s nest on a deep pond, where there was no
boat, she adopted the same method, and made the voyage both ways alone
without the slightest uneasiness.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_45" href="#FNanchor_45" class="label">[45]</a> 
Two letters from Miss Cay to James, one dated Sept. 1,
the other October 21, 1841, were kept by Mr. Clerk Maxwell, and have
been preserved. Although not significant enough to be inserted here,
they show the confidential intercourse which had sprung up between
“Aunt Jane” and her sister’s son. She writes of theological and other
matters which would not generally be thought interesting to a boy of
ten, thanks him for his thoughtfulness in getting ferns for her, and
says, “I was glad to hear you were happy, with all your experiments and
adventures.” There had been a visit to Edinburgh that summer, and she
writes as if anticipating that it would be soon repeated. There is also
a reference to an elaborate set of Berlin-wool work for the furniture
of the drawing-room at Glenlair, which had been begun in Mrs. Maxwell’s
lifetime, and was afterwards completed by Miss Cay.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_45">[Pg 45]</span></p>

<h2 class="nobreak" id="CHAPTER_III">CHAPTER III.<br>
<span class="allsmcap">BOYHOOD—EDINBURGH ACADEMY—“OLD 31”—HOLIDAYS AT GLENLAIR—1841 TO
1844—ÆT. 10-13.</span></h2>
</div>

<p class="nind">
THE first school-days are not always a time of progress.
For one whose home life has been surrounded with an atmosphere of
genial ideas and liberal pursuits, to be thrown, in the intervals of
“gerund-grinding,” amongst a throng of boys of average intelligence
and more than average boisterousness, is not directly improving at
the outset. Not that Maxwell ever retrograded—for his spirit was
inherently active; but where the outward environment was such as
awakened no response in him, he was like an engine whose wheels do not
bite—working incessantly, but not advancing much. If the Scottish
day-school system had not still been dominated by a tyrannous economy,
and by that spirit of <i>laisser faire</i> which in education is apt
to result in the prevalence of the worst, much that was in Maxwell
would earlier have found natural vent and growth. As it was, he was
of course storing up impressions, as under any circumstances he would
have been; but his activities were apt for the time to take odd shapes,
as in a healthy plant under a sneaping wind. Or, to employ another
metaphor, the light in him was still aglow, but in<span class="pagenum" id="Page_46">[Pg 46]</span> passing through an
alien medium its rays were often refracted and disintegrated. The crowd
of “aimless fancies,” whose influence upon his life be so touchingly
deprecated at a later time,<a id="FNanchor_46" href="#Footnote_46" class="fnanchor">[46]</a> were now most importunate; and,
bright and full of innocence as they were, they produced an effect of
eccentricity on superficial observers which he afterwards felt to have
been a hindrance to himself. His mother’s influence, had she lived,
would have been most valuable to him at this time.</p>

<figure class="figcenter width500" id="i_074" style="width: 400px;">
<img src="images/i_074.jpg" width="400" height="261" alt="A
line-drawing illustration of a horse-drawn carriage with figures in top
hats and period dress gathered near a doorway marked 31, with a dog at
the steps, labeled Edinburgh and dated 10th Nov. 1841.">
</figure>


<div class="sidenote">1841. <i>Æt.</i> 10.</div>

<p>The journey from Glenlair had been broken at Newton<a id="FNanchor_47" href="#Footnote_47" class="fnanchor">[47]</a> and at
Penicuik, where a halt of some days was made. It was the middle of
November, and a season of snow and frost.</p>

<p>Soon after dusk on the 18th of November, the whole family party,
including the<span class="pagenum" id="Page_47">[Pg 47]</span> faithful domestic, Lizzy Mackeand,<a id="FNanchor_48" href="#Footnote_48" class="fnanchor">[48]</a> arrived at the
door of No. 31 Heriot Row, Mrs. Wedderburn’s house in Edinburgh. This
(with occasional intervals, when he was with Miss Cay) was to be James
Clerk Maxwell’s domicile for eight or nine years to come.</p>

<p>The “White Horse” seen through a lunette above the doorway, the quaint
figure of the butler (nick-named “Hornie” from the way he dressed his
hair<a id="FNanchor_49" href="#Footnote_49" class="fnanchor">[49]</a>), and other noticeable features of this dwelling, appear
and reappear in the boy’s letters to his father, which now become
more frequent. For, although not choosing to be much separated from
James, Mr. Clerk Maxwell could not be long absent from Glenlair, and
henceforward he lived a divided life between the two, spending most of
the winter evenings by his sister’s fireside in Edinburgh, and during
most of the spring and summer attending personally to the improvement
of his estate.</p>


<p class="space-above2">
The Edinburgh Academy, which had been founded in 1824, was in high
favour with the denizens of the New Town. Lord Cockburn was one
of the directors. The Rector, Archdeacon Williams, was an Oxford
first-classman, a College acquaintance of John Lockhart’s,<a id="FNanchor_50" href="#Footnote_50" class="fnanchor">[50]</a> and
an admirable teacher. He had at one time been an assistant master
at Winchester, and had subsequently, at Lockhart’s recommendation,
been tutor to Charles, Sir W. Scott’s second son. The boys in the
junior<span class="pagenum" id="Page_48">[Pg 48]</span> classes, however, knew little of him except by report, for the
assistant masters were jealous of their independence.</p>

<p>Various entries in his Diary testify to the father’s deliberate care
in placing his son at the Academy. Everything which seemed material to
the boy’s advantage had no doubt been carefully considered; but there
was one serious omission, arising from Mr. Clerk Maxwell’s inveterate
disregard of appearances. The boy was taken to school in the same
garments in which we have seen him at Glenlair. No dress could be
more sensible in itself. A tunic of hodden gray tweed is warmer than
a round cloth jacket for winter wear, and the brazen clasps were a
better fastening for the square-toed shoes than an adjustment of black
tape, which is always coming undone. But round jackets were <i>de
rigueur</i> amongst the young gentlemen; while it must be admitted that
they were<span class="pagenum" id="Page_49">[Pg 49]</span> equally intolerant of dandyism. A frill for a round collar
was of course unendurable, and the Gallovidian clasps—not to mention
the square toes—were an unheard-of novelty. A new boy, coming in the
second month of the second year, must in any case have had something to
undergo; but here was evident provocation to “a parcel of boys in their
teens.”<a id="FNanchor_51" href="#Footnote_51" class="fnanchor">[51]</a></p>

<p>What happened in the interval after the first lesson (in the space
behind the second class-room) is best indicated in the words of the
Psalmist:—“They came about me like bees.”</p>

<p>“Who made those shoes?” was the first question; but it was never easy
to get a direct answer from Maxwell, least of all on compulsion.
Brought thus to bay, he had recourse to his natural weapon—irony. His
answer was soon ready, and his tormentors might make of it what they
list. In the broadest tones of his Corsock <i>patois</i> he replied to
one of them,</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Div ye ken, ’twas a man,</div>
    <div class="verse indent0">And he lived in a house,</div>
    <div class="verse indent0">In whilk was a mouse.”</div>
  </div>
</div>
</div>

<p>He returned to Heriot Row that afternoon with<span class="pagenum" id="Page_50">[Pg 50]</span> his tunic in rags
and “wanting” the skirt; his neat frill rumpled and torn;—himself
excessively amused by his experiences, and showing not the smallest
sign of irritation. It may well be questioned, however, whether
something had not passed within him, of which neither those at home nor
his schoolfellows ever knew.</p>

<p>The nickname of “Dafty” which they then gave him clung to him while
he remained at school, and he took no pains to get rid of it. His
“quips and cranks” were taken for “cantrips,” his quick, short, elfin
laughter (the only sign by which he betrayed his sensitiveness), was
construed into an eldritch noise. Never was cygnet amongst goslings
more misconstrued. Within the class-rooms things were not much more
prosperous at first. Our master, Mr. A. N. Carmichael, was a good and
experienced teacher, and an excellent scholar, in a dryish way. He was
the author of the <i>Edinburgh Academy Greek Grammar</i> and of an
Account of the Irregular Greek Verbs, which has now been superseded,
but was justly respected in its day. He was a good disciplinarian;
but those junior classes of sixty and upwards were too large and
miscellaneous for real teaching. He had an eye for talent, too, where
it was shown. But his first business was to hear our tasks, and to let
us take places in the class in proportion to the accuracy and readiness
with which we said them. Maxwell did not at once enter into the spirit
of this contest, in which the chief requisites, next to average talent
and intelligence, were push and promptitude. His first initiation
in Latin had not been<span class="pagenum" id="Page_51">[Pg 51]</span> pleasant to him, and the repetition <i>ad
nauseam</i> of “<i>di, do, dum,</i>” by his new acquaintances, varied
with the sound of the tawse, did not make the subject more attractive.
Like the boy Teufelsdröckh, he seemed to hear at school innumerable
dead vocables, but no language. His hesitation got worse and worse,
and as his place in the class was not amongst the “best boys,” some of
his neighbours willingly did their utmost to disconcert him. On one
occasion we shall find him humorously retaliating. He was not in the
least inwardly perturbed by all this, nor bore any one the slightest
malice. It was a new scene of life, which he contemplated with amused
curiosity. But it was natural that his chief interest should not lie
there. He seldom took part in any games, though he was loyally proud
of the success of his school in them, and characteristically took some
interest in the spinning of “pearies” (pegtops), and the collision
of “bools” (marbles); but, when he could, preferred wandering alone,
sometimes imprisoning the humble-bees on the green slope at the back
and letting them go again, sometimes doing queer gymnastics on the few
trees that were left,—availing himself, in short, of the scanty inlets
by which Nature visited that shingly ground.<a id="FNanchor_52" href="#Footnote_52" class="fnanchor">[52]</a> For his heart was at
Glenlair, even when he made sport for the young Philistines of the
Academy “yards.” It should be added that his attendance was a good deal
interrupted by delicate health.</p>

<p><span class="pagenum" id="Page_52">[Pg 52]</span></p>

<div class="sidenote">1842-43.
<i>Æt.</i> 10-12.</div>

<p>His life during this period was really centred in “Old 31.” He was
presently allowed to have a room to himself, in which he could read
and draw and write, besides preparing for school. His cousin Jemima
was at this time learning the art of woodcutting, and he was allowed
sometimes to dig away with her tools. The result was a series of rude
engravings, to which allusions occur in his letters to his father;
and a woodcut of his, representing the head of an old woman, still
remains, with the date 1843 engraved on it. In the previous year he
produced more than one elaborate piece of knitting. One of these, a
sort of sling for holding a work-basket, with its proper name, “Mrs.
Wedderburn’s Abigail,” worked into it, has been preserved by Mrs.
Blackburn. The library at his new home was more extensive than at
Glenlair. He came to know Swift and Dryden, and after a while Hobbes,
and Butler’s <i>Hudibras</i>. Then if his father was in Edinburgh they
walked together, especially on the Saturday half-holiday, and “viewed”
Leith Fort, or the preparations for the Granton railway, or the
stratification of Salisbury Crags; always learning something new, and
winning ideas for imagination to feed upon.<a id="FNanchor_53" href="#Footnote_53" class="fnanchor">[53]</a></p>

<div class="sidenote"><i>Æt.</i> 10.</div>

<p>One Saturday, February 12, 1842, he had a special treat, being taken
“to see electro-magnetic machines.”</p>

<p><span class="pagenum" id="Page_53">[Pg 53]</span></p>

<p>Mr. Clerk Maxwell was much more like an elder brother than a “governor”
to James, and there was nothing the boy could not or did not tell
him,—none of his whimsical vagaries in which the father did not take
delight.</p>

<div class="sidenote2">1842-43.
<i>Æt.</i> 10-12.</div>

<p>And when “his papaship” was alone at Glenlair, James would strive
to cheer him in his solitude by concocting the wildest absurdities,
inventing a kind of cypher to communicate some airy nothing,
illuminating his letters after the fashion of his school copy-books,
and adding sketches of school-life (<i>e.g.</i> the class-room in
the absence of the teacher), et cetera. This series of letters is so
curious that it has been thought worth while to reproduce one of the
least elaborate of them in facsimile. Some of those omitted are still
more interesting, as showing his love of drawing complicated patterns
and arranging colours, and as marking the early and spontaneous
development of “the habit of constructing a mental representation of
every problem,”<a id="FNanchor_54" href="#Footnote_54" class="fnanchor">[54]</a> which was in some degree an hereditary proclivity.
In order, however, to judge fairly of these <i>enfantillages</i>, the
reader must take into account the boy’s affectionate solicitude to
amuse his father, who was accustomed to receive whimsical familiarities
from his young relatives in “Old 31.”<a id="FNanchor_55" href="#Footnote_55" class="fnanchor">[55]</a></p>

<p><span class="pagenum" id="Page_54">[Pg 54]</span></p>

<p>In Edinburgh, as at Glenlair, he was allowed to participate in the
amusements of his elders.</p>

<div class="sidenote"><i>Æt.</i> 12.</div>

<p>It is just worth mentioning that his first play was <i>As You Like
It</i>, with Mrs. Charles Kean as Rosalind; and more important to
observe that on December 18th, 1843, his father took him to a meeting
of the Edinburgh Royal Society.</p>

<p>But at school also he gradually made his way. He soon discovered that
Latin was worth learning, and the Greek Delectus interested him, when
we got so far.<a id="FNanchor_56" href="#Footnote_56" class="fnanchor">[56]</a> And there were two subjects in which he at once took
the foremost place, when he had a fair chance of doing so; these were
Scripture Biography and English. In arithmetic, as well as in Latin,
his comparative want of readiness kept him down.</p>

<p>On the whole he attained a measure of success which helped to secure
for him a certain respect, and, however strange he sometimes seemed
to his companions, he had three qualities which they could not fail
to understand—agile strength of limb, imperturbable courage, and
profound good nature. Professor James Muirhead remembers him as “a
friendly boy, though never quite amalgamating with the rest.” And
another old class-fellow, the Rev. W. Macfarlane of Lenzie, records
the following as his impression:—“Clerk Maxwell, when he entered the
Academy, was somewhat rustic and somewhat eccentric. Boys called him
‘Dafty' and used to try to make fun of him. On one occasion I remember
he turned with<span class="pagenum" id="Page_55">[Pg 55]</span> tremendous vigour, with a kind of demonic force, on his
tormentors.</p>

<div class="sidenote2">1843-44.
<i>Æt.</i> 12-13.</div>

<p>I think he was let alone after that, and gradually won the respect even
of the most thoughtless of his schoolfellows.”<a id="FNanchor_57" href="#Footnote_57" class="fnanchor">[57]</a></p>

<p>It was on some such occasion as that to which Mr. Macfarlane here
refers,—somewhere in 1843 or 1844,—that my own closer intimacy and
lifelong friendship with James Clerk Maxwell began. I cannot recall
the exact circumstances, only the place in the Academy yards, the warm
rush of chivalrous emotion, and the look of affectionate recognition in
Maxwell’s eyes. However imperturbable he was, one might see that he was
not thick-skinned.</p>

<p>Shortly after this we became near neighbours, my mother’s new domicile
being 27 Heriot Row, and we were continually together for about three
years.</p>

<p>His letters now refer with more of interest to his progress at school,
especially to exercises in verse, and to outdoor recreation with
companions; above all to his delight in bathing and in learning to
swim. In this, as in everything he did, he invented curious novelties,
and was particularly fond of mimicking his old acquaintance, the frog.</p>

<p>On Sundays he generally went with his father to St. Andrew’s Church
(Mr. Crawford’s) in the forenoon, and, by Miss Cay’s desire, to St.
John’s Episcopal Chapel in the afternoon, where, also by her desire,
he was for a time a member of Dean Ramsay’s catechetical<span class="pagenum" id="Page_56">[Pg 56]</span> class. Thus,
having of course learned “his questions” as a child, he became equally
acquainted with the catechisms both of the Scotch and of the English
Church, and with good specimens of the Presbyterian and Episcopalian
styles of preaching. He also went regularly “to the dancing” at Mr.
MacArthur’s, where he was distinguished for the neatness of his
reel-steps, especially of those curious ones which some of us found
most difficult, such as the “lock-step.”</p>

<p>But more delightful than bathing, and more interesting even than
writing English verse, was the achievement of which he writes casually
to his father very shortly after his thirteenth birthday.</p>

<div class="sidenote">June 1844.
<i>Æt.</i> 13.</div>

<p>After describing the Virginian Minstrels, and betwixt inquiries after
various pets at Glenlair, he remarks, as if it were an ordinary piece
of news, “I have made a tetrahedron, a dodecahedron, and two other
hedrons, whose names I don't know.” We had not yet begun geometry, and
he had certainly not at this time learnt the definitions in Euclid;
yet he had not merely realised the nature of the five regular solids
sufficiently to construct them out of pasteboard with approximate
accuracy, but had further contrived other symmetrical polyhedra derived
from them,<a id="FNanchor_58" href="#Footnote_58" class="fnanchor">[58]</a> specimens of which (as improved in 1848) may be still
seen at the Cavendish Laboratory.</p>

<p>Who first called his attention to the pyramid, cube, etc., I do not
know. He may have seen an<span class="pagenum" id="Page_57">[Pg 57]</span> account of them by chance in a book. But the
fact remains that at this early time his fancy, like that of the old
Greek geometers, was arrested by these types of complete symmetry; and
his imagination so thoroughly mastered them, that he proceeded to make
them with his own hand. That he himself attached more importance to
this moment than the letter indicates, is proved by the care with which
he has preserved these perishable things, so that they (or those which
replaced them in 1848) are still in existence after thirty-seven years.</p>


<p class="nindc space-above2"><span class="allsmcap">Letters</span>, 1842 to 1844.</p>

<div class="blockquot">

<p class="right">[<i>April 1842.</i>]</p>

<div class="sidenote2"><i>Æt.</i> 10.</div>

<p><span class="allsmcap">My dear Papa</span>—The day you went away Lizzy and I went to the
Zoological Gardens, and they have got an elephant, and Lizzy was
frightened for its ugly face. One gentleman had a boy that asked if the
Indian cow was he.</p>

<p>Asky<a id="FNanchor_59" href="#Footnote_59" class="fnanchor">[59]</a> thinks he is a scholar, and was for going with me to the
school, and came into the dancing to-day.</p>

<p>On Friday there was great fun with Hunt the Gowk;<a id="FNanchor_60" href="#Footnote_60" class="fnanchor">[60]</a> we could believe
nothing, for the clocks were all “stopped,” and everybody had a “hole
in his jacket.” Does Margaret<a id="FNanchor_61" href="#Footnote_61" class="fnanchor">[61]</a> play on the trump<a id="FNanchor_62" href="#Footnote_62" class="fnanchor">[62]</a> still? and what
are the great works? Does Bobby sail in the tub?—I am, your obedient
servant,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>
</div>


<p class="nindc">[<i>Illuminated letters at beginning, and border after.</i>]</p>

<div class="blockquot">

<div class="sidenote2"><i>Æt.</i> 10.</div>

<p><span class="allsmcap">My dear Mr. Maxwell</span>—I saw your son to-day, when he told me
that you could not make out his riddles. Now,<span class="pagenum" id="Page_58">[Pg 58]</span> if you mean the Greek
jokes, I have another for you. A simpleton wishing to swim was nearly
drowned. As soon as he got out he swore that he would never touch water
till he had learned to swim; but if you mean the curious letters on the
last page, they are at Glenlair.—Your aff. Nephew,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>


<p>I have cut a puggy<a id="FNanchor_63" href="#Footnote_63" class="fnanchor">[63]</a> nut, and some of the oil came upon my fingers,
and it smelt like linseed Oil, but it did not hurt. There was a boy
that brought Sea fyke<a id="FNanchor_64" href="#Footnote_64" class="fnanchor">[64]</a> to the school, and put it down the boys’
backs, for which he was condemned to learn 12 lines for 3 days. Talking
about places, I am 14 to-day, but I hope to get up. Ovid prophesies
very well when the thing is over, but lately he has prophesied a
victory which never came to pass. I send you a Bagpiper to astonish the
natives with.<a id="FNanchor_65" href="#Footnote_65" class="fnanchor">[65]</a> I have got a jumping paddock and a boortree gun.<a id="FNanchor_66" href="#Footnote_66" class="fnanchor">[66]</a>
When are you coming?— Your most obedient Sarvent,</p>

<p class="right">Jas. Alex. M'Merkwell.<a id="FNanchor_67" href="#Footnote_67" class="fnanchor">[67]</a></p>
</div>


<div class="sidenote"><i>Æt.</i> 10.</div>

<p><i>Envelope of 24th June 1843</i>—</p>

<p class="nindc">Mr. John Clerk Maxwell,<br>
Postyknowswere,<br>
Kirkpatrick Durham,<br>
<span class="right">Dumfries.</span></p>

<figure class="figcenter width500" id="i_087" style="width: 500px;">
<img src="images/i_087.jpg" width="500" height="838" alt="A decorative
hand-illustrated letter page with an ornate floral wreath framing two
profile sketches at the top, and an elaborately bordered text section
below beginning with a large illuminated M.">
<figcaption class="caption">
<p>Mr Catlin killing the Buffalo.</p>
<p>My Dear Sir.
At the Indian lecture we heard Mr Catlin give a lecture as the bill
says in his American dress in which he told us how these people killed
the buffaloes with a bow.</p></figcaption>
</figure>


<figure class="figcenter width500" id="i_088" style="width: 500px;">
<img src="images/i_088.jpg" width="500" height="736" alt="A handwritten
diary page describing a theatre performance, accompanied by a whimsical
sketch of an acrobatic contortionist balanced upside-down on a pole
with limbs splayed outward.">
<figcaption class="caption">
<p>How his dress was like that of the Romans At the theatre
M Goulle did wonders and Miss Terman was very funny I have finished the
red bag Mrs T. is said you wrote to Ill and U matically but I said you
had been taught at the High School when people did not know any better.
The rest to be read backwards through the paper</p></figcaption>
</figure>

<figure class="figcenter width500" id="i_089" style="width: 500px;">
<img src="images/i_089.jpg" width="500" height="763" alt="A handwritten
letter page with mirror-written text at the top (meant to be read
backwards), closing with a decorative flourish and a sketch of a
leaping horse beneath a small framed vignette.">
<figcaption class="caption">
<p>...has been doing a picture of Han[del?</p>
<p> Gordon and
some think the fa[ce too] long, [crossed out] I am one of them, others
[think] it too short. I am gaining up my [drawing] at the Academy, and
we have begun Greek Extracts and Ovid. Monday n[ext is] a fine day
to look at, but east wind[s] Jemima has been making woodcuts for a
Con[cert]...</p>
<p>I am
Your most obedient servant
“Guess who?”
May 1843.</p></figcaption>
</figure>

<p><span class="pagenum" id="Page_59">[Pg 59]</span></p>

<div class="blockquot">

<p class="right">“<i>Old 31</i>” <i>28th March 1844.</i></p>

<p><span class="allsmcap">My dear Father</span>—On <i>S</i>aturday last we went to the Marine
Villa;<a id="FNanchor_68" href="#Footnote_68" class="fnanchor">[68]</a> it had a very strong Marine scent, but I suppose it is
all the better <i>f</i>or that. I found out where shellfish breed;
the<i>y</i> breed in sea fy<i>ke</i>; there were muscles, codes,
and oysters no b<i>i</i>gger than the<i>s</i>e \(\bigcirc \bigcirc
\bigcirc\) f<i>a</i>stned to the fyke by filaments. Nell and Frolic
were immersed in the serene bosom of NePtune, from which with still
quiverin<i>g</i> limbs theY came <i>o</i>ut, but with very different
feeliNGs; but Nell exited the c<i>o</i>mpAssioN of Me<i>d</i>dum,<a id="FNanchor_69" href="#Footnote_69" class="fnanchor">[69]</a>
and was carried by her. I have fLi<i>t</i>ed up to the little garret.
W<i>h</i>at l<i>i</i>ke is the <i>n</i>ew taDPole? and how is
Ma<i>g</i>gy getting on with <i>f</i>mmm;<a id="FNanchor_70" href="#Footnote_70" class="fnanchor">[70]</a> how much m<i>or</i>e is
to be done conceRnING O fye, says the <i>p</i>ie. J<i>o</i>hn’s house
is not finished yeT, I suppose. There have been <i>l</i>etters from
uncle RoberT, dated G<i>i</i>bber Altar, but I have not <i>s</i>een or
<i>h</i>eard what <i>i</i>s i<i>n</i> them FarTHEr than that he was to
be at Suez on Monday last. Lizzy says that when you come back it woulD
not bE dispLeasin<i>g</i> to her iF you <i>w</i>ould br<i>i</i>ng a
bawl of gray wors<i>t</i>ed, w<i>h</i>Ich lAst word I suppose meaNS
woolen threAd. I have cast three seaLs of Lead from the life, or rather
from the death; one of a cockle and two of mUScles, one of which is, or
raTher will be, on this letter J. If you want to know more look along
from the beginning of the letter to the mark J for the red and blue
letters<a id="FNanchor_71" href="#Footnote_71" class="fnanchor">[71]</a> in order.</p>

<p>How are all the bodies and beasts,—Praecipue, Nanny, Maggy, Fanny,
Bobby, Toby, and Marco.—Your obt. servt.,</p>

<p class="right"><span class="allsmcap">Jas. Alex. M'Merkwell.</span></p>
</div>

<p><span class="pagenum" id="Page_60">[Pg 60]</span></p>

<div class="blockquot"><div class="sidenote"><i>Æt.</i> 10.</div>

<p>[<i>19th June 1844.</i>]</p>

<p class="right">“<i>Old 31</i>”</p>

<p><span class="allsmcap">My dear Father</span>—On Wednesday I went to the Virginian
minstrels, in which some of the songs were sung, the first line
accompanied with clappers, the second on a tamborine, the third on a
banjo, like this, ... played like a guitar very quickly, and the fourth
on the fiddle, and the chorus by all together. There were guesses<a id="FNanchor_72" href="#Footnote_72" class="fnanchor">[72]</a>
in abundance; and there was an imitation of a steam onion, and other
things which you will find in the bill. On Saturday, having got the
play for verses on Laocoon, I went with Cha. H. Johnstone<a id="FNanchor_73" href="#Footnote_73" class="fnanchor">[73]</a> so far,
and then went to the murrain vile till Mrs. MʻKenzie, Ninny, and
кvνη<a id="FNanchor_74" href="#Footnote_74" class="fnanchor">[74]</a> went to visit Cramond, where I played with the boies till high
water; and the minister’s young brother and the too boies and I doukit
in C (big sea as кvνη calls it), and then dried ourselves after the
manner of Auncient Greeks; we had also the luxury of a pail of water to
wash our feet in.</p>

<p>How is a’ aboot the house now our Gudeman’s at home? How are herbs,
shrubs, and trees doing?—cows, sheep, mares, dogs, and folk? and
how did Nannie like bonny Carlisle? Mrs. Robt. Cay was at the church
on Sunday.<a id="FNanchor_75" href="#Footnote_75" class="fnanchor">[75]</a> I have made a tetra hedron, a dodeca hedron, and 2
more hedrons that I don’t know the wright names for. How do doos and
Geraniums come on.—Your most obt. servt.</p>

<p class="right"><span class="allsmcap">Jas. Alex. MʻMerkwell.</span><br>
125 127413 2611891014151617</p>
</div>

<p><span class="pagenum" id="Page_61">[Pg 61]</span></p>

<div class="blockquot">

<p class="right"><i>10th July 1844.</i></p>

<p><span class="allsmcap">Dear Father</span><a id="FNanchor_76" href="#Footnote_76" class="fnanchor">[76]</a>—Excuse me on account of being so long of
writing, because of my being totally employed about preparations of
verses, English and Latin. I made four lines of Latin one week, for
which. I got the play from ten; but I am not going to try for the
prize, as when I lithp in numberth it ith but a lithp, for the numberth
do not come even with the help of Gradus; but I am making English ones
on the apparition of Creüsa to Æneas in the end of the second book.
Besides this, I am preparing the biography,<a id="FNanchor_77" href="#Footnote_77" class="fnanchor">[77]</a> and have been making
a list of the kings of Israel and Judah. I have been going to Cramond
and playing with the boys every Saturday; they went to Rayhills on the
ninth. Dooking<a id="FNanchor_78" href="#Footnote_78" class="fnanchor">[78]</a> is grown fine and warm now.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">O father! can it be that souls sublime</div>
    <div class="verse indent0">return to visit our terrestrial clime?<a id="FNanchor_79" href="#Footnote_79" class="fnanchor">[79]</a></div>
  </div>
</div>
</div>

<p class="nindc">Your obt. servt. and son to you,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>
</div>

<p>I have been wavering about 14 for a good while in the Latin.</p>

<hr class="tb">

<p class="nindc">
<span class="allsmcap">Holidays at Glenlair—1842 to 1844.</span></p>

<p><span class="pagenum" id="Page_62">[Pg 62]</span></p>

<p>We can readily imagine the sense of enlargement and release with which
the boy went home to Glenlair after his first long sojourn in Edinburgh.</p>

<figure class="figcenter width500" id="i_094a" style="width: 300px;">
<img src="images/i_094a.jpg" width="300" height="201" alt="A
pen-and-ink sketch of two children sitting in wash-tubs floating on a
river, with overhanging trees and rocky banks framing the scene.">
</figure>

<p class="nind">
The shadow which had fallen in 1839 was softened by
time, and society in the Happy Valley<a id="FNanchor_80" href="#Footnote_80" class="fnanchor">[80]</a> resumed its
aspect of harmless gaiety.</p>

<p><span class="pagenum" id="Page_63">[Pg 63]</span></p>

<figure class="figcenter width500" id="i_094b" style="width: 300px;">
<img src="images/i_094b.jpg" width="300" height="206" alt="A
pen-and-ink sketch of a group of figures gathered by a riverbank
beneath overhanging branches, with one perched on a rock above the
water and others wading or standing along the shore.">
</figure>

<p class="nind">
Cousin Jemima was again there with her pencil. The “tubbing” was, of
course, resumed, this time conjointly, and the scene of it was advanced
from the duck-pond to the river, showing greatly increased confidence
in navigation.<a id="FNanchor_81" href="#Footnote_81" class="fnanchor">[81]</a></p>

<p>There were nutting excursions, walks diversified with climbing, etc.
etc.</p>

<div class="sidenote2"><i>Æt.</i> 12.</div>

<p>And in August and September 1843 there were again archery meetings at
different houses in the valley, of one of which (the last) there has
been preserved the following notice from one of the local newspapers of
the time:—</p>

<div class="blockquot">

<p class="nindc">Archery in “The Happy Valley.”</p>

<p>The Toxophilite Club of the Valley of Urr held their last meeting for
the season on Mrs. Lawrie of Ernespie’s lawn, on Tuesday the 12th curt.
The club consists of from forty to fifty members.</p>

<p>Their meetings this summer have been quite charming. They ranged over
the whole valley, on this fair lawn to-day, and on that the next; and
after their couple of hours of archery was over, a picnic took place
on the spot. “God save the Queen” was invariably sung with the most
graceful loyalty; and the hospitable mansion adjoining gave them music
and a hall for the evening quadrille, which wound up the delights of
the day.</p>

<p>At every meeting some little prize was proposed to give zest to the
sport; Mr. Herries of Spottes, for instance, gave a case of ladies’
arrows, which was shot for and gained by one of the lady competitors.
Nor lacks the club its Laureate and its Painter to glorify the pastime.
A scion of<span class="pagenum" id="Page_64">[Pg 64]</span> the House of Middlebie has lent gallantry to the archers by
his spirited songs; and a fair lady, a friend of the same house, has
painted a couple of pieces, and presented them, the one to Mr. Lawrence
of Largnean, the president of the club, and the other to Mrs. Bell of
Hillowton, the lady patroness. The former picture represents William
Tell aiming at the apple on his son’s head; the latter, the chaste
huntress Diana piercing a stag. Both are “beautiful exceedingly.”</p>

<p>Thus well accomplished in every point and accessory of their beautiful
pastime, loyal and happy are the Bowyers of Urr.</p>
</div>

<p class="space-above2">
One of James’s spirited songs, a parody of Scott, beginning
“Toxophilite, the conflict’s o’er,” still exists in Cousin Jemima’s
handwriting, with a sketch for the picture of William Tell, in which
the features of the House of Middlebie are idealised. The artist also
proved the best shot on this occasion. The poem is not worth printing,
though it has characteristic touches of grotesque ingenuity and
humorous observation which are very curious in a boy of twelve.</p>

<div class="sidenote"><i>Æt.</i> 12.</div>

<p>The summer of 1843 was also memorable for the completion of the New
Offices at Glenlair. Whatever he may have intended before the death of
his wife, Mr. Clerk Maxwell made no change in the dwelling-house during
his lifetime. But these out-buildings had been designed by himself; he
had drawn the working plans for the masons; he had acted as clerk of
the works, rejecting unfit material, etc., and every detail had been
executed under his own eye. So absorbed was he in the supervision,
that he omitted his usual visit to Edinburgh in July. In one of
Mrs.<span class="pagenum" id="Page_65">[Pg 65]</span> Blackburn's drawings of the previous year, he is seen laying
out the ground for the new offices, with James beside him intently
contemplating his father's work. We may be sure that Mr. Maxwell had
explained every step in the whole procedure, and equally sure that his
son laid the lesson well to heart.</p>

<p>Soon after this he was provided with a new source of endless amusement
in the “devil-on-two-sticks,” which thenceforth became inseparable from
the home life at Glenlair, and the companion of his holidays at Glasgow
and elsewhere, even in the Cambridge time. In the family dialect it
was humorously referred to <i>sotto-voce</i> as “the deil.” There was
nothing he could not do with that d——l. No performer on the slack
or tight rope ever made such intricate evolutions and gyrations. His
delight in it was like that which afterwards he used to take in the
dynamical top.</p>

<div class="sidenote2">1843-44.
<i>Æt.</i> 12-13.</div>

<p>The boy now came to know his own neighbourhood more widely. There were
expeditions, visits, rides. The Covenanter’s pool in the burn above
Upper Corsock, New Abbey, Caerlaverock, and other places of traditional
interest, were explored. And in the summer of 1844 there was a sort of
driving excursion into the Cairnsmuir country, which is described in
detail in the Diary.</p>

<p>It may be mentioned here in a general way, that the Christmas holidays
were spent either at Penicuik (with skating, etc.) or Killearn, and
afterwards sometimes at Glasgow with Professor and Mrs. Blackburn or
Professor (now Sir William) Thomson.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_46" href="#FNanchor_46" class="label">[46]</a> 
In the poem written after his father’s death in 1856.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_47" href="#FNanchor_47" class="label">[47]</a> 
Above, <a href="#Page_4">p. 4.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_48" href="#FNanchor_48" class="label">[48]</a> 
Now Mrs. MacGowan, Kirkpatrick-Durham.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_49" href="#FNanchor_49" class="label">[49]</a> 
His real name was James Craigie.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_50" href="#FNanchor_50" class="label">[50]</a> 
The inscription beneath his bust in Balliol College,
Oxford, is a just tribute to the memory of one who, though he had his
foibles, was a born educator, and no ordinary man:</p>

<p class="nindc">
<span class="allsmcap">John Williams, M.A.,</span><br>
Archdeacon of Cardigan—1835-1858;<br>
Rector of the Edinburgh Academy—1824-1847;<br>
Warden of Llandovery College—1848-1853;<br>
Who, by the geniality of his Character<br>
And the vigour of his Intellect,<br>
Won the hearts of his Pupils,<br>
And gave his life to the study of the Classics in Scotland:<br>
A Celtic Scholar,<br>
An ardent lover of Wales and of the Welsh People,<br>
After a long absence,<br>
He returned to his Native Land<br>
And devoted his great talents<br>
To the instruction of his Countrymen:<br>
Born 1792; Died 1858.<br>
He resided at this College<br>
Between the years 1810 and 1814.<br>
</p>

<p>See also Lockhart’s <i>Life of Scott</i>, small edition of 1871, pp.
484, 744, 781.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_51" href="#FNanchor_51" class="label">[51]</a></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“I do believe the veriest hen’s</div>
    <div class="verse indent0">In the world is a parcel of boys in their teens.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0"><i>Fo’c’s’le Yarns.</i></div>
  </div>
</div>
</div>

<p>The palinode should also be quoted:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“‘Fiends’ I called them, did I? Well,</div>
    <div class="verse indent0">I shouldn then. It’s hard to tell;</div>
    <div class="verse indent0">And it’s likely God has got a plan</div>
    <div class="verse indent0">To put a spirit in a man</div>
    <div class="verse indent0">That’s more than you can stow away</div>
    <div class="verse indent0">In the heart of a child. But he’ll see the day</div>
    <div class="verse indent0">When he’ll not have a bit too much for the work</div>
    <div class="verse indent0">He’s got to do.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0"><i>Ibid.</i></div>
  </div>
</div>
</div>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_52" href="#FNanchor_52" class="label">[52]</a> 
Things are altered now. For years past there has been an
ample recreation-ground provided for the boys of the Academy.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_53" href="#FNanchor_53" class="label">[53]</a> 
Less frequently, he would rove about alone. Professor
Fleeming Jenkin remembers hearing him say that when he first saw the
twisted piles of candles with which grocers decorate their windows,
he was struck by the curious and complex curves resulting from the
combinations of these simple cylinders, and was resolved to understand
all about that some day.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_54" href="#FNanchor_54" class="label">[54]</a> 
Professor Tait. In the letter of January 18, 1840
(above, <a href="#Page_33">p. 33</a>), in his ninth year, when, in speaking of his amusement
of seal-engraving he says, “I made a bird and a beast,” the words
“bird” and “beast” are each accompanied with a sort of hieroglyphic
representing the figure he had made upon the seal.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_55" href="#FNanchor_55" class="label">[55]</a> 
This is clearly proved by a set of delightful rhyming
epistles addressed to him by his niece, Isabella Wedderburn, afterwards
Mrs. Mackenzie, then a bright young girl, between the years 1825 and
1827.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_56" href="#FNanchor_56" class="label">[56]</a> 
The <i>Academy Greek Rudiments</i> was purchased before
leaving Edinburgh for the holidays, July 28, 1842.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_57" href="#FNanchor_57" class="label">[57]</a> 
“One hautboy will,” etc. From an entry in his father’s
Diary of May 19, 1847, it appears that he was even then not free from
annoyance. And I can bear witness to the fact.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_58" href="#FNanchor_58" class="label">[58]</a> 
By producing the facets until their alternate planes
intersected. In the specimens still extant, the facets belonging to
each plane of the original polyhedron are distinguished by specific
colouring.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_59" href="#FNanchor_59" class="label">[59]</a> 
Pet name of a dog. See illustration on <a href="#Page_18">p. 18.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_60" href="#FNanchor_60" class="label">[60]</a> 
Scotch name for the license of April Fool’s day.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_61" href="#FNanchor_61" class="label">[61]</a> 
A daughter of his nurse.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_62" href="#FNanchor_62" class="label">[62]</a> 
The Jew’s harp.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_63" href="#FNanchor_63" class="label">[63]</a> 
<i>i.e.</i> Cashew nut. This is characteristic. Compare
the description of the boy-genius in <i>Fo'c’s'le Yarns</i>:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Bless ye! the pisons was just like mate</div>
    <div class="verse indent0">To Tommy, that liked to feel the strong</div>
    <div class="verse indent0">They were, and rowlin’ them on his tongue.”</div>
  </div>
</div>
</div>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_64" href="#FNanchor_64" class="label">[64]</a> 
A substance often found on the sea-shore. It is of a
honey-combed structure, and consists, in fact, of the egg-capsules
of the common whelk (<i>Buccinum undatum</i>). When dried and
pulverised, it has an irritating effect upon the skin. Hence the local
name:—“Fyke”= fidget. See Jamieson’s <i>Dictionary</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_65" href="#FNanchor_65" class="label">[65]</a> 
This fantastic and elaborately-coloured illustration is
certainly sufficiently astonishing.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_66" href="#FNanchor_66" class="label">[66]</a> 
<i>i.e.</i> A pop-gun of elder-wood.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_67" href="#FNanchor_67" class="label">[67]</a> 
Anagram of James Clerk Maxwell.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_68" href="#FNanchor_68" class="label">[68]</a> 
Silverknowe, near Granton, which was being prepared as a
residence for Mr. and Mrs. Mackenzie (Isabella Wedderbum).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_69" href="#FNanchor_69" class="label">[69]</a> 
Mrs. Wedderburn.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_70" href="#FNanchor_70" class="label">[70]</a> 
The sound of the “trump.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_71" href="#FNanchor_71" class="label">[71]</a> 
Here represented by italics and small capitals
respectively. The italics spell—<i>Sea fyke is a good thing for
polishing with</i>. The small capitals spell-<span class="allsmcap">-I am copying an old
print out of the delfian</span> (<i>i.e.</i> Delphin) <span class="allsmcap">sallust</span>.
It need not be observed that the capricious spelling in these letters
is merely a piece of “daftness.” The spelling of the letters of 1841
(<i>Æt.</i> 9-10) is faultless.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_72" href="#FNanchor_72" class="label">[72]</a> 
<i>i.e.</i> riddles or conundrums, of which the boy was
fond.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_73" href="#FNanchor_73" class="label">[73]</a> 
A son of Admiral Hope Johnstone, then living at Cramond,
a scion of the Johnstones, who in 15—had a feud with the Maxwells, but
in later times claimed kinship with them.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_74" href="#FNanchor_74" class="label">[74]</a> 
“<i>i.e.</i> Coonie,” viz. Mr. Colin Mackenzie, then a
child of three.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_75" href="#FNanchor_75" class="label">[75]</a> 
This helps to fix the date of this letter. Mrs. R.
Cay joined her husband in China early in the spring of 1845. Her
son Alexander was born May 7, and christened on Wednesday, June
26, 1844. Mr. C. Maxwell had left Edinburgh for Glenlair on June
7, taking with him six pigeons in a basket, and some cuttings of
pelargonium. His first entry in the Diary after this, at Glenlair, is
as follows:—“<i>Saturday, June 8</i>.—Got home to dinner, and find
all well After dinner plant cuttings of pelargonium from Killearn, and
sort the doves in the new dove-cot.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_76" href="#FNanchor_76" class="label">[76]</a> 
Now, every letter received from James is recorded in
the Diary, and the only such entry between the limits of June 7-26 is
on June 21st. “<span class="allsmcap">The three pairs op doves all sitting</span>. Recd,
letters from Mrs. Wed. and James.” It was a two-days' post. The letters
dated July 10 was received on July 12. The “Verses on Laocoon” point to
the same date. The translation from Virg. <i>Æn.</i> i. 159-169, which
certainly preceded them, was given in on May 10, 1844.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_77" href="#FNanchor_77" class="label">[77]</a> 
<i>i.e.</i> Scripture History.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_78" href="#FNanchor_78" class="label">[78]</a> 
<i>i.e.</i> Bathing.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_79" href="#FNanchor_79" class="label">[79]</a> 
From the poem on “Creüsa.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_80" href="#FNanchor_80" class="label">[80]</a> 
This name was given to the Vale of Urr in the
<i>Coterie-Sprache</i>, and adopted even by the local newspapers in
their notices of various social gatherings.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_81" href="#FNanchor_81" class="label">[81]</a> 
Long afterwards, when asked by some one ignorant of
Galloway, if there was boating on the Urr, he would answer by a grave
reference to this incident.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_66">[Pg 66]</span></p>

<h2 class="nobreak" id="CHAPTER_IV">CHAPTER IV.<br>
<span class="allsmcap">ADOLESCENCE—1844 TO 1847—<i>ÆT.</i> 13-16.</span></h2>
</div>

<p class="nind">
THE commencement of the fifth year at the Academy was, for
many of us boys, a time of cheerfulness and hope. The long period of
mere drill and task-work was supposed to be over. We had learned the
800 irregular Greek Verbs, either by our own efforts, or by hearing
others say them, and had acquired some moderate skill in Latin verse
composition. On entering the rector's class-room, our less mechanical
faculties were at once called into play. We found our lessons less
burdensome when we had not merely to repeat them, but were continually
learning something also in school. And the repetition of Virgil and
Horace was a very different thing from the repetition of the rules of
gender and quantity. Some foretaste of this more genial method had
been afforded us in the previous year, when we had been encouraged
to turn some bits of Virgil into English verse. But the change was,
notwithstanding, considerable, and it was accompanied with another
advance, which for Maxwell was at least equally important, for it was
now that we began the serious study of geometry.</p>

<p>In October 1844 Mr. Clerk Maxwell and his sister, Mrs. Wedderbum, were
both far from well, and James<span class="pagenum" id="Page_67">[Pg 67]</span> was received in Edinburgh by his aunt,
Miss Cay. He writes to his father, October 14, 1844:—</p>

<div class="blockquot">

<p>I like P——<a id="FNanchor_82" href="#Footnote_82" class="fnanchor">[82]</a> better than B——.<a id="FNanchor_83" href="#Footnote_83" class="fnanchor">[83]</a> We have lots of jokes, and he
speaks a great deal, and we have not so much monotonous parsing. In the
English, Milton is better than history of Greece.... I was at Uncle
John’s,<a id="FNanchor_84" href="#Footnote_84" class="fnanchor">[84]</a> and he showed me his new electrotype, with which he made a
copper impression of the beetle. He can plate silver with it as well as
copper, and he gave me a \(\Box\) thing with which it may be done. At
night I have generally made vases.</p>
</div>

<p>This letter is sealed with the scarabaeus referred to as “the beetle.”</p>

<p>In the next letter we have a trace of his hesitation not being yet
conquered:—</p>

<div class="blockquot">

<p>P—— says that a person † of education never puts in † hums and haws;
he goes † on with his † sentence without senseless interjections.</p>

<p><i>N.B.</i>—Every † means a dead pause.<a id="FNanchor_85" href="#Footnote_85" class="fnanchor">[85]</a></p>
</div>

<p>While thus privately retorting on his censor, he took a singular means
for curing his own defect. He made a plan of the large window in the
rector’s room, and wrote the words of the lesson in the spaces of the
frame-work. He conned his task in that setting, and,<span class="pagenum" id="Page_68">[Pg 68]</span> when saying
it, looked steadily at the actual window, where, as he averred, the
arrangement of the panes then helped to recall the order of the words.
The only fear was that by changing his place in the class he might be
obliged to stand sideways to the window.</p>

<p>Our mathematical teacher, Mr. Gloag, was a man who combined a real gift
for teaching with certain humorous peculiarities of tone and manner.
He was sometimes impatient, but had a kind heart, and we liked him all
the better because we mimicked him.<a id="FNanchor_86" href="#Footnote_86" class="fnanchor">[86]</a> Old academicians still delight
in talking of him. He never allowed us to miss a step in any proof, and
made us do many “deductions,” which we puzzled out entirely without
help. It must have been the companionship of Maxwell that made those
hours so delightful to me. We always walked home together, and the talk
was incessant, chiefly on Maxwell’s side. Some new train of ideas would
generally begin just when we reached my mother’s door. He would stand
there holding the door handle, half in, half out, while,</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Much like a press of people at a door</div>
    <div class="verse indent0">Thronged his inventions, which should go before,”</div>
  </div>
</div>
</div>

<p class="nind">
till voices from within complained of the cold draught, and warned us
that we must part.</p>

<p>From some mathematical principle he would start off to a joke of
Martinus Scriblerus, or to a quotation from Dryden, interspersing
puns and other outrages on language of the wildest kind, “humming and
hawing”<span class="pagenum" id="Page_69">[Pg 69]</span> in spite of P——; or in a quieter mood he would tell the
story of Southey’s <i>Thalaba</i>, or explain some new invention, which
I often failed to understand. Our common ground in those days was
simple geometry, and never, certainly, was emulation more at one with
friendship. But whatever outward rivalry there might be, his companions
felt no doubt as to his vast superiority from the first. He seemed to
be in the heart of the subject when they were only at the boundary;
but the boyish game of contesting point by point with such a mind was
a most wholesome stimulus, so that the mere exercise of faculty was a
pure joy. With Maxwell, as we have already seen, the first lessons of
geometry branched out at once into inquiries which soon became fruitful.</p>

<div class="sidenote2">1844-46.
<i>Æt.</i> 13-15.</div>

<p>“Meantime, the rural ditties were not mute.” Besides a serio-comic
impromptu on the grievance of a holiday task, and other effusions
concerning incidents of our school life, there was a romantic ballad
written about Christmas 1844 or 5, and in July 1845 the prize for
English verse was gained by the poem on the death of the Douglas, to
which he refers in one of his letters to Miss Cay.<a id="FNanchor_87" href="#Footnote_87" class="fnanchor">[87]</a></p>

<div class="sidenote2">1845.
<i>Æt.</i> 14.</div>

<p>But a prize of more consequence was the mathematical<span class="pagenum" id="Page_70">[Pg 70]</span> medal, of which
he writes to his aunt in a tone of undisguised though generous triumph.
The following letters were written in June and July 1845:—</p>

<div class="blockquot">

<p class="nindc space-above2"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>June 1845.</i></p>

<p>I have drawn a picture of Diana,<a id="FNanchor_88" href="#Footnote_88" class="fnanchor">[88]</a> and made an octohedron on a new
principle, and found out a great many things in geometry. If you make
two circles equal, and make three steps with the compasses (of any
size), and cut them out in card, and also three equal strips, with
holes at each end, and joint them with thread to the upper side of one
circle and the lower side of the other; then if you put a pin through
the centre of one and turn the other, the one will turn, and if you
draw the same thing on both in the same position,— if you turn them
<i>ever</i> so,—they will always be in the same position.</p>


<p class="right"><i>July 1845.</i></p>

<p>The subjects for prizes are as follows:—English Verses—The gude Schyr
James Dowglas; Latin Hexameters and Pentameters—The Isles of Greece;
Latin Sapphics—The Rhine. I have been getting information in many
books for Douglas, but I found it so difficult not to Marmionise, that
is, to speak in imitation of <i>Marmion</i>,—that I am making it in
eight syllable lines. I have got Barbour’s <i>Bruce</i>, Buke 20, which
is a help in a different language, which is all fair; my motto is:—</p>

<p><b>“Men. may. weill. wyte. thouch. nane. them. tell. How. angry. for.
sorrow. and. how. fell. Is. to. tyne. sic. a. lord. as. he. To. them.
that. war. of. hys. mengye.</b>”<a id="FNanchor_89" href="#Footnote_89" class="fnanchor">[89]</a></p>

<p>Pa and I went to your house on Saturday and watered the plants. I have
got the lend of the whole of Horne’s.</p>
</div>

<figure class="figcenter width500" id="i_103" style="width: 500px;">
<img src="images/i_103.jpg" width="500" height="866" alt="A decorative
illustrated page within an ornamental rope-and-leaf border, depicting
an armored knight on horseback beside a tree where a cloaked figure
crouches in shadow.">
<figcaption class="caption">
<p>The Vampyre, Compylt into Meeter, by Jas Clerk Maxwell.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Thair is a Knichts rydis through the wood,</div>
    <div class="verse indent2">And a douchty Knichts is hee;</div>
    <div class="verse indent0">And rare hee is on a message sent,</div>
    <div class="verse indent2">Hee rydis sae hastilie.</div>
    <div class="verse indent0">Hee passit the aik, and hee passit the birk,</div>
    <div class="verse indent2">And hee passit monie a tre,</div>
    <div class="verse indent0">But pleasant to him war the sough sae shrill,</div>
    <div class="verse indent2">For beneath it hee did see</div>
  </div>
</div>
</div>
</figcaption>
</figure>

<figure class="figcenter width500" id="i_104" style="width: 500px;">
<img src="images/i_104.jpg" width="500" height="884" alt="A handwritten
page of archaic-style verse continuing The Vampyre poem, framed by
a rope-and-leaf border, describing the comely lady combing her golden
hair by the brook and the knight's vow to follow her wherever she
goes.">
<figcaption class="caption">
<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
<div class="verse indent0">The bonniest Ladye that ever hes saw,</div>
<div class="verse indent2">Scho was sae schynand fair,</div>
<div class="verse indent0">And there scho sat, beneath the heugh,</div>
<div class="verse indent2">Kaiming hir gowden hair.</div>
<div class="verse indent0">And then the Knichts: “O Ladye brichte,</div>
<div class="verse indent2">“What chance hes brought you here,</div>
<div class="verse indent0">“But say the word, and ye schall gang</div>
<div class="verse indent2">“Back to your kindred dear.”</div>
<div class="verse indent0">Then up and spok the Ladye fair —</div>
<div class="verse indent2">“I have nae friends or kin,</div>
<div class="verse indent0">“But in a littel boat I live,</div>
<div class="verse indent2">“Amidst the waves loud din.”</div>
<div class="verse indent0">Then answered thus the douchty Knichts —</div>
<div class="verse indent2">“I'll follow you through all,</div>
<div class="verse indent0">“For gin ye bee in a littel boat,</div>
<div class="verse indent2">“The world to it seems small.”</div>
<div class="verse indent0">They gaed through the wood, and through the wood,</div>
<div class="verse indent2">To the end of the wood they came.</div>
<div class="verse indent0">And when they came to the end of the wood,</div>
<div class="verse indent2">They saw the raft sae faem.</div>
<div class="verse indent0">And then they saw the wee wee boat</div>
<div class="verse indent2">That dauncéd on the top of the wave,</div>
<div class="verse indent0">And first got in the Ladye fair,</div>
<div class="verse indent2">And then the Knichts sae brave.</div>
  </div>
</div>
</div>
</figcaption>
</figure>

<figure class="figcenter width500" id="i_105" style="width: 500px;">
<img src="images/i_105.jpg" width="500" height="857" alt="A handwritten
page continuing The Vampyre poem within the rope-and-leaf border,
describing the knight rowing the boat and turning to see the lady's
cheek grow ghastly pale as he recognizes her as his former love, long
since dead.">
<figcaption class="caption">
<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
<div class="verse indent0">They got into the wee wee boat,</div>
<div class="verse indent2">And rowed wi' a' thair micht;</div>
<div class="verse indent0">When the Knichts sae brave hee turnit about,</div>
<div class="verse indent2">And lookit at the Ladye bricht,</div>
<div class="verse indent0">Hee lookit at hir bonie cheik,</div>
<div class="verse indent2">And hee lookit at hir twa bricht eyne,</div>
<div class="verse indent0">But hir rosie cheik growes ghaistly pale,</div>
<div class="verse indent2">And scho seymit as scho deid had bene.</div>
<div class="verse indent0">The fause fause Knichts growes pale wi fricht,</div>
<div class="verse indent2">And his hair rase up on end,</div>
<div class="verse indent0">For ganesby days cam to his mynde,</div>
<div class="verse indent2">And his former love hee kenned.</div>
<div class="verse indent0">Then spake the Ladye, “Thou fause Knichte,</div>
<div class="verse indent2">“Hast done to mee much ill,</div>
<div class="verse indent0">“Thou didst forsake mee long ago</div>
<div class="verse indent2">Bot I am constant still.</div>
<div class="verse indent0">For though I ligg in the moolds sae cald,</div>
<div class="verse indent2">At rest I canna bee,</div>
<div class="verse indent0">Until I sucke the gude lyfe bluide</div>
<div class="verse indent2">Of the man that gart me dee.</div>
<div class="verse indent0">Hee saw hir lippis were wet wi bluide,</div>
<div class="verse indent2">And hee saw hir lyfelesse eyne,</div>
<div class="verse indent0">And loud hee cryde, “Get frae my syde,</div>
<div class="verse indent2">“Thou Vampyr corps unclean.”</div>
  </div>
</div>
</div>
</figcaption>
</figure>


<p><span class="pagenum" id="Page_71">[Pg 71]</span></p>

<figure class="figcenter width500" id="i_106" style="width: 500px;">
<img src="images/i_106.jpg" width="500" height="899" alt="The final
page of The Vampyre poem, framed by the rope-and-leaf border,
concluding the tale as the vampire sucks the knight's blood until
his death on the wide sea, with a closing warning to beware of that
deceitful spright.">
<figcaption class="caption">
<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
<div class="verse indent0">But noe hee is in hir magic boat,</div>
<div class="verse indent2">And on the wyde wyde sea,</div>
<div class="verse indent0">And the Vampyr sucks his guidlyfe bluide,</div>
<div class="verse indent2">Scho sucks hym till hees dee.</div>
<div class="verse indent0">So now beware, wheere you are,</div>
<div class="verse indent2">That walkis in this lone wood;</div>
<div class="verse indent0">Beware of that deceitfull spright,</div>
<div class="verse indent2">The ghaist that suckis the bluide.</div>
  </div>
</div>
</div>
</figcaption>
</figure>

<p class="nind">
<i>Introduction to the Knowledge of the Scriptures, and Prideaux’s
Connection of the Old and New Testaments</i>, and Townshend’s
<i>Harmony</i>, which are of great use.<a id="FNanchor_90" href="#Footnote_90" class="fnanchor">[90]</a></p>

<div class="blockquot">

<div class="sidenote2"><i>Æt.</i> 14.</div>

<p class="right"><i>July 1845.</i></p>

<p>I have got the 11th prize for Scholarship, the 1st for English, the
prize for English verses, and the Mathematical Medal. I tried for
Scripture Knowledge, and Hamilton in the 7th has got it. We tried for
the Medal<a id="FNanchor_91" href="#Footnote_91" class="fnanchor">[91]</a> on Thursday. I had done them<a id="FNanchor_92" href="#Footnote_92" class="fnanchor">[92]</a> all, and got home at ½
past 2; but Campbell stayed till 4. I was rather tired with writing
exercises from 9 till ½ past 2.<a id="FNanchor_93" href="#Footnote_93" class="fnanchor">[93]</a></p>

<p>Campbell and I went “once more unto the b(r)each ” to-day at
Portobello. I can swim a little now. Campbell has got 6 prizes. He got
a letter written too soon congratulating him upon <i>my</i> medal; but
there is no rivalry betwixt us, as B—— Carmichael says.</p>
</div>

<p>His aunt, Miss Cay, to whom these letters are addressed, had begun
again to take more charge of him than in the preceding years. Mrs.
Wedderburn's health was very uncertain. Cousin Jemima was grown-up and
immersed in her own pursuits, and the companionship of his cousin,
George Wedderburn, a young man about Edinburgh, and a humourist of
a different order, was not in every way the most suitable<span class="pagenum" id="Page_72">[Pg 72]</span> for the
growing boy. The Diary shows that he was continually at his aunt’s
house, No. 6 Great Stuart Street, and she is associated with some of my
earliest recollections of him. She sought to bring him out amongst her
friends, to soften his singularities, and to make him more like other
youths of his age. And he would help her with patterns, arrangement
of colours, etc., as well as with her flowers. One of his earliest
applications of geometry was to set right the perspective of a view of
the interior of Roslin Chapel on which she was engaged.</p>

<p>Mr. Clerk Maxwell was a frequent visitor at the Academy at this time.
His broad, benevolent face and paternal air, as of a gentler Dandie
Dinmont, beaming with kindness for the companions of his son, is
vividly remembered by those who were our schoolfellows in 1844-5.</p>


<p class="space-above2">
The summer vacation of 1845 was spent almost wholly at Glenlair. James
passed a day now and then at Upper Corsock with the Fletcher boys,<a id="FNanchor_94" href="#Footnote_94" class="fnanchor">[94]</a>
and sometimes accompanied his father when he went out shooting; but he
must have had abundance of time for reading and for following his own
devices. The country gentlemen were particularly absorbed that year in
political excitement, and Mr. Clerk Maxwell was often called away. The
only event worth mentioning was a “jaunt,” evidently suggested by Miss
Cay, to Newcastle, Durham, and Carlisle, which gave Maxwell<span class="pagenum" id="Page_73">[Pg 73]</span> his first
direct impression of English Cathedral Architecture.</p>

<p>The taste thus formed was strengthened by a visit to Melrose in the
following summer.</p>

<div class="blockquot">

<p>Saw the House of Abbotsford and antiquities in it, and go to Melrose.
Got there about 2, and settle to remain all night. Spend the day and
also the evening about the Abbey. Jane Cay and James drawing.—Diary,
1846, Sept. 10.</p>
</div>

<div class="sidenote2">1845.
<i>Æt.</i> 14.</div>

<p>On returning to Edinburgh for the winter, Mr. Clerk Maxwell seems
to have been roused by the expectation which his son’s first school
distinction had awakened amongst his kindred and acquaintance. He
became more assiduous than ever in his attendance at meetings of the
Edinburgh Society of Arts and Royal Society, and took James with him
repeatedly to both. And so it happened that early in his fifteenth
year the boy dipped his feet in the current of scientific inquiry,
where he was to prove himself so strong a swimmer. In our walks round
Arthur’s Seat, etc., he had always something new to tell. For example,
in February 1846, he called my attention to the glacier-markings on the
rocks, and discoursed volubly on this subject, which was then quite
recent, and known to comparatively few.</p>

<p>A prominent member of the Society of Arts at this time was Mr. D. R.
Hay, the decorative painter, whose attempt to reduce beauty in form
and colour to mathematical principles<a id="FNanchor_95" href="#Footnote_95" class="fnanchor">[95]</a> had attracted considerable<span class="pagenum" id="Page_74">[Pg 74]</span>
attention amongst scientific men. Such ideas had a natural fascination
for Clerk Maxwell, and he often discoursed on “egg-and-dart,” “Greek
pattern,” “ogive,” and what not, and on the forms of Etruscan urns.</p>

<div class="sidenote"><i>Æt.</i> 14.</div>

<p>One of the problems in this department of applied science was how
to draw a perfect oval; and Maxwell, who had by this time begun the
(purely geometrical) study of Conic sections, became eager to find a
true practical solution of this. How completely his father entered into
his pursuit may best be shown by the following extracts from Mr. Clerk
Maxwell's Diary:—</p>

<div class="blockquot">

<p class="right">1846,</p>

<p class="right"><i>February.</i></p>

<p>W. 25.—Called on ... Mr. D. E. Hay at his house, Jordan Lane, and saw
his diagrams and showed James’s Ovals—Mr. Hay’s are drawn with a loop
on 3 pins, consequently formed of portions of ellipses.</p>

<p>Th. 26.—Call on Prof. Forbes at the College, and see about Jas. Ovals
and 3-foci figures and plurality of foci. New to Prof. Forbes, and
settle to give him the theory in writing to consider.<a id="FNanchor_96" href="#Footnote_96" class="fnanchor">[96]</a></p>
</div>

<div class="blockquot">

<p class="right"><i>March.</i></p>

<p>M. 2.—Wrote account of James’s ovals for Prof. Forbes.
Evening.—Royal Society with James, and gave the above
to Mr. Forbes.</p>

<p><span class="pagenum" id="Page_75">[Pg 75]</span></p>

<p>W. 4.—Went to the College at 12 and saw Prof. Forbes, about Jas.
ovals. Prof. Forbes much pleased with them, investigating in books to
see what has been done or known in this subject. To write to me when he
has fully considered the matter.</p>
</div>

<p>Sa. 7.—Recd. note from Prof. Forbes:—</p>

<div class="blockquot">

<p class="right"><i>Edinburgh, 6th March</i> 1846.</p>

<p><span class="allsmcap">My dear Sir</span>—I have looked over your son’s paper carefully,
and I think it very ingenious,—certainly very remarkable for his
years; and, I believe, substantially new. On the latter point I have
referred it to my friend, Professor Kelland, for his opinion.—I
remain, dear Sir, yours sincerely,</p>

<p class="right"><span class="allsmcap">James D. Forbes.</span></p>
</div>

<p>W. 11.—Recd. note from Professor Forbes:—</p>

<div class="blockquot">

<p class="right">3 <i>Park Place, 11th March</i> 1846.</p>

<p><span class="allsmcap">My dear Sir</span>—I am glad to find to-day, from Professor Kelland,
that his opinion of your son’s paper agrees with mine; namely, that
it is most ingenious, most creditable to him, and, we believe, a new
way of considering higher curves with reference to foci. Unfortunately
these ovals appear to be curves of a very high and intractable order,
so that possibly the elegant method of description may not lead to a
corresponding simplicity in investigating their properties. But that is
not the present point. If you wish it, I think that the simplicity and
elegance of the method would entitle it to be brought before the Royal
Society.—Believe me, my dear Sir, yours truly,</p>

<p class="right"><span class="allsmcap">James D. Forbes.</span></p>

<p><span class="allsmcap">J. Clerk Maxwell, Esq.</span></p>
</div>

<p>Th. 12.—Called for Prof. Forbes at the College and conversed about the
ovals.</p>

<p>M. 16.—Went with James to Royal Society.</p>

<p>T. 17.—Jas. at Prof. Forbes’s House, 3 Park Place, to Tea, and to
discourse on the ovals. Came home at 10. A successful visit.</p>

<p>T. 24.—Cut out pasteboard trainers for Curves for James.</p>

<p>W. 25.—Call at Adie’s,<a id="FNanchor_97" href="#Footnote_97" class="fnanchor">[97]</a> to see about Report on D. E. Hay’s paper on
ovals.</p>

<p>Th. 26.—Recd. D. E. Hay’s paper and machine for drawing ovals, etc.</p>

<p>M. 30.—Called on Prof. Forbes at College and saw Mr. Adie about report
on Mr. Hay’s paper. Jas. ovals to be at next meeting of R.S.</p>

<p><span class="pagenum" id="Page_76">[Pg 76]</span></p>

<p>M. 6.—Royal Society with Jas. Professor Forbes gave acct. of James’s
ovals. Met with very great attention and approbation generally.</p>

<p>The result of the attempt thus eagerly pursued, as communicated by
Professor Forbes that evening, is embodied in the <i>Proceedings of the
Edinburgh Royal Society</i>, vol. <span class="allsmcap">II.</span> pp. 89-93.</p>

<p class="nindc"><span class="allsmcap">Monday</span>, 6<i>th April</i> 1846.</p>

<p class="nindc">Sir Thomas M. Brisbane, Bart., President, in the Chair.</p>

<p>The following communications were read:—</p>

<div class="blockquot">

<p>1. On the Description of Oval Curves, and those having a plurality of
Foci. By Mr. <span class="allsmcap">Clerk Maxwell</span>, junior, with Remarks by Professor
Forbes. Communicated by Professor Forbes.</p>

<p>Mr. Clerk Maxwell ingeniously suggests the extension of the common
theory of the foci of conic sections to curves of a higher degree of
complication, in the following manner:—</p>

<p>1. As in the ellipse and hyperbola, any point in the curve has the
<i>sum</i> or <i>difference</i> of two lines drawn from two points or
<i>foci</i> = a constant quantity, so the author infers that curves
to a certain degree analogous may be described and determined by the
condition that the simple distance from one focus, <i>plus</i> a
multiple distance from the other, may be = a constant quantity; or
more generally, \(m\) times the one distance + \(n\) times the other =
constant.</p>

<p>2. The author devised a simple mechanical means, by the wrapping of a
thread round pins, for producing these curves. See Figs. 1 and 2 (Plate
11). He then thought of extending the principle to other curves, whose
property should be, that the sum of the simple or multiple distances
of any point of the curve from three of more points or foci, should be
= a constant quantity; and this, too, he has effected mechanically,
by a very simple arrangement of a<span class="pagenum" id="Page_77">[Pg 77]</span> string of given length passing
round three or more fixed pins, and constraining a tracing point,
\(\text{P}\). See Pig. 3. Further, the author regards curves of the
first kind as constituting a particular class of curves of the second
kind, two or more foci coinciding in one, a focus in which two strings
meet being considered a double focus; when three strings meet a treble
focus, etc.</p>

<p>Professor Forbes observed that the equation to curves of the first
class are easily found, having the form—
\[
\sqrt{} x^{2}+y^{2}=a+b \quad \sqrt{(x-c)^{2}+y^{2}},
\]
which is that of the curve known under the name of the First Oval
of Descartes. Mr. Maxwell had already observed that, when one of
the foci was at an infinite distance (or the thread moved parallel
to itself, and was confined, in respect of length, by the edge of a
board), a curve resembling an ellipse was traced; from which property
Professor Forbes was led first to infer the identity of the oval with
the Cartesian oval, which is well known to have this property. But the
simplest analogy of all is that derived from the method of description,
\(r\) and \(r'\) being the radients to any point of the curve from the
two foci.
\[
m r+n r^{\prime}=\text {constant},
\]
which, in fact, at once expresses on the undulatory theory of light
the optical character of the surface in question, namely, that light
diverging from one focus \(\text{F}\) without the medium, shall be
directly convergent at another point \(f\) within it; and in this case
the ratio \(\dfrac{n}{m}\) expresses the index of refraction of the
medium.</p>

<p>If we denote, by <i>the power of either focus</i>, the number of
strings leading to it by Mr. Maxwell’s construction, and if one of the
foci be removed to an infinite distance,—if the powers of the two
foci be <i>equal</i>, the curve is a parabola; if the power of the
nearer focus be greater than the other, the curve is an ellipse; if
the power of the infinitely distant focus be the greater, the curve is
a hyperbola. The first case evidently corresponds to the reflection
of parallel rays to a focus, the velocity being unchanged after
reflection; the second, to the refraction of parallel rays to a focus
in a dense medium (in which light moves slower); the third case, to
refraction into a rarer medium.</p>
</div>

<p><span class="pagenum" id="Page_78">[Pg 78]</span></p>

<figure class="figcenter width500" id="i_114a" style="width: 300px;">
<img src="images/i_114a.jpg" width="300" height="242" alt="A simple
geometric diagram showing three concentric elliptical rings, with two
points labeled F and r connected by lines to a point P on the outer
ellipse.">
<figcaption class="caption">
<p>Fig. 1. Two Foci. Ratios 1:2.</p></figcaption>
</figure>

<figure class="figcenter width500" id="i_114b" style="width: 300px;">
<img src="images/i_114b.jpg" width="300" height="144" alt="A simple
geometric diagram showing an elliptical shape with two line segments
extending outward from a point labeled P on its perimeter, with the
opposite end of one line marked F and the other P.">
<figcaption class="caption">
<p>Fig. 2. Two Foci Ratios 2:3.</p></figcaption>
</figure>


<p><span class="pagenum" id="Page_79">[Pg 79]</span></p>

<figure class="figcenter width500" id="i_114c" style="width: 300px;">
<img src="images/i_114c.jpg" width="300" height="238" alt="A simple
geometric diagram showing three concentric egg-shaped or oval curves,
with a point labeled r connected by lines to two points labeled F and
F' within the innermost curve, forming a triangle.">
<figcaption class="caption">
<p>Fig. 3. Three Foci. Ratios of Equality.</p></figcaption>
</figure>

<div class="blockquot">

<p>The Ovals of Descartes were described in his <i>Geometry</i>, where he
has also given a mechanical method of describing one of them, but only
in a particular case, and the method is less simple than Mr. Maxwell's.
The demonstration of the optical properties was given by Newton in the
<i>Principia</i>, Book <i>I.</i> Prop. 97, by the law of the sines,
and by Huygens in 1690, on the Theory of Undulations, in his <i>Traité
de la Lumière</i>. It probably has not been suspected that so easy and
elegant a method exists of describing these curves by the use of a
thread and pins whenever the powers of the foci are commensurable. For
instance, the curve, Fig. 2, drawn with powers 3 and 2 respectively,
give the proper form for a refracting surface of glass, whose index
of refraction is 1·50, in order that rays diverging from \(f\) may be
refracted to \(\text{F}\).</p>

<p>As to the higher classes of curves, with three or more focal points,
we cannot at present invest them with equally clear and curious
physical properties, but the method of drawing a curve by so simple a
contrivance, which shall satisfy the condition,
\[
m r+n r^{\prime}+p r^{\prime \prime}+\text {etc.}.,=\text {constant},
\]
is in itself not a little interesting; and if we regard, with Mr.
Maxwell, the ovals above described, as the limiting case of the
others by the coalescence of two or more foci, we have a further
generalisation of the same kind as that so highly commended by
Montucla, by which Descartes elucidated the conic sections as
particular cases of his oval curves.</p>
</div>

<p>This was the beginning of the lifelong friendship between Clerk Maxwell
and James D. Forbes. “I loved James Forbes” was his own emphatic
statement to me in 1869. Maxwell's gratitude to all from whom he had
received any help or stimulus was imperishable.</p>

<div class="sidenote2"><i>Æt.</i> 14-15.</div>

<p>The curve-drawing, and the problems connected<span class="pagenum" id="Page_80">[Pg 80]</span> with it, were by no
means the only original investigations of this year. Mr. John Scott,
of Scott Brothers, Greenock, remembers being in the attic of 31 Heriot
Row, and seeing some preparations of jelly with which James was
experimenting there. Mr. Scott left Edinburgh in the summer of 1846.
What was the exact object of these experiments and others on <i>gutta
percha</i> at this time is matter of conjecture. There is little
doubt that they prepared the way for the investigation concerning the
compression of elastic solids. But it seems probable that they were
immediately suggested by Forbes’s <i>Theory of Glaciers</i>, which
had recently called attention to the whole question of the difference
between solid, liquid, and “viscous” bodies, and the different effects
of gravitation and pressure as applied to them.<a id="FNanchor_98" href="#Footnote_98" class="fnanchor">[98]</a> Another set of
phenomena with which his mind was soon afterwards engaged, viz. those
of the refraction and polarisation of light, were partly studied
through similar means.</p>

<p>The work of his cousin, who was now a rising artist, still interested
him. An entry in the father’s Diary, December 5, 1845, has reference to
this:—</p>

<div class="blockquot">

<p>Walk with Jas. and Jemima to Botanical Garden to inspect
palm-trees—for her sketching for a picture.</p>
</div>

<p>Either in this or the following year I remember his raising the
question, Whether it was not possible to determine mathematically the
curve of the waves<span class="pagenum" id="Page_81">[Pg 81]</span> on a particular shore, so as to represent them with
perfect truth in a picture.</p>

<div class="sidenote2">1845-47,
<i>Æt.</i> 15-16.</div>

<p>After contributing to the <i>Proceedings</i> of the Edinburgh Royal
Society, it might perhaps have been expected that Clerk Maxwell,
although scarcely 15, would at least have been taken from the Academy
and sent to the classes of Mathematics and Natural Philosophy at the
University. Instead of this, he simply completed his course at school.
His inventions may perhaps have interfered a little with his regular
studies:—for he missed the Mathematical medal in 1846—but he was
one of the few of the class which he had joined in 1841 who continued
at the Academy until 1847. And when he left, although still younger
than his competitors by about a twelvemonth, he was not only first in
mathematics and English, but came very near to being first in Latin.
He had not yet “specialised” or “bifurcated,” although the bent of
his genius was manifest. Nor have I ever heard him wish that it had
been otherwise. On the contrary, he has repeatedly said to me in later
years that to make out the meaning of an author with no help excepting
grammar and dictionary (which was our case) is one of the best means
for training the mind. Some of his school exercises in Latin prose and
<i>verse</i> are still extant, and, like everything which he did, are
stamped with his peculiar character.<a id="FNanchor_99" href="#Footnote_99" class="fnanchor">[99]</a></p>

<p>The first Greek play we read (the <i>Alcestis</i> of Euripides)
made an impression<span class="pagenum" id="Page_82">[Pg 82]</span> on him to which he reverted in a conversation
many years afterwards.<a id="FNanchor_100" href="#Footnote_100" class="fnanchor">[100]</a> At the same time he had a quick eye for
the absurdities of pedantry. One of the teachers was apt to annoy
our youthful taste by a literal exactness in translating the Greek
particles, which would have pleased some more recent scholars. Maxwell
expressed our feelings on this subject in a few lines, of which I can
only recall the beginning:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Assuredly, at least, indeed,</div>
    <div class="verse indent2">—<i>Decidedly</i> alsó ...”</div>
  </div>
</div>
</div>

<p class="nind">
The frigid climax in “decidedly” is a good instance of
his roguish irony.</p>

<p>In September 1846 I made my first visit to Glenlair. It was a time of
perpetual gladness, but the particulars are hardly worth recording.
James used to sleep long and soundly, and seemed to be the whole
day at play, eagerly showing me his treasures and accompanying each
exhibition with lively talk, sprinkled with innumerable puns.<a id="FNanchor_101" href="#Footnote_101" class="fnanchor">[101]</a>
After such a breakfast as became that land of milk and honey, there
was a long interval, while Mr. Maxwell was attending to home business
and deliberating what the “expedite”<span class="pagenum" id="Page_83">[Pg 83]</span> should be. Miss Cay meanwhile
was writing letters, or finishing some drawing of Lincluden or New
Abbey (where they had lately been), and James would flit to and fro
between the little den, where his books and various apparatus lived,
and the drawing-room,<a id="FNanchor_102" href="#Footnote_102" class="fnanchor">[102]</a> where his father sat in the arm-chair, with
Tobs on knee. Ever and anon we boys would escape out of doors and have
a run in the field or the garden, or a bout with the d——1. So the
morning would pass till an early luncheon, after which Tobin must do
his various tricks; then, if the men were busy, James would himself
harness Meg, the Galloway pony, for the drive of the afternoon. After
dinner and Toby’s second performance, and another turn at the deil,
there would be something more to see—Cousin Jemima’s drawings, recent
diagrams or other inventions of his own, the magic discs, etc. etc.,
the charm of the whole consisting in the flow of talk, incessant, but
by no means unbroken,</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Changing, hiding,</div>
    <div class="verse indent0">Doubling upon itself, dividing,”</div>
  </div>
</div>
</div>

<p class="nind">
of which neither of us ever tired. On Sunday there was the drive to
Corsock Church (where the absolute gravity of his countenance was
itself a study),<a id="FNanchor_103" href="#Footnote_103" class="fnanchor">[103]</a> and the walk home by the river, past the Kirk
pool, renowned for bathing, with conversations of a more earnest kind,<span class="pagenum" id="Page_84">[Pg 84]</span>
and a stroll on the estate in the afternoon; or, if we stayed at home,
he would show his favourite books and talk about them, till the evening
closed with a chapter and a prayer, which the old man read to the
assembled household.</p>


<div class="sidenote"><i>Æt.</i> 15.</div>

<p>During the winter of 1846-47, James was unusually delicate. He was
often absent from school, and seems not to have attended the meetings
of the Societies. But of these his father was sure to give him a
faithful report. He was certainly more than ever interested in science.
The two subjects which most engaged his attention were magnetism and
the polarisation of light. He was fond of showing “Newtons rings”—the
chromatic effect produced by pressing lenses together—and of watching
the changing hues on soap bubbles.</p>

<p>In the spring of 1847 (somewhere in April) his uncle, Mr. John Cay,
whose scientific tastes have been mentioned more than once above, took
James and myself (with whom he chose to share all such delights) to
see Mr. Nicol, a friend of Sir David Brewster, and the inventor of the
polarising prism.<a id="FNanchor_104" href="#Footnote_104" class="fnanchor">[104]</a> Even before this James had been absorbed in
“polarised light,” working with Iceland spar, and twisting his head
about to see “Haidinger’s Brushes” in the blue sky with his naked eye.
But this visit added a new and important stimulus to his interest in
these phenomena, and the speculations to which they give rise.<a id="FNanchor_105" href="#Footnote_105" class="fnanchor">[105]</a></p>

<p><span class="pagenum" id="Page_85">[Pg 85]</span></p>

<p>Shortly afterwards (May 25th) he went with his father to the cutler's
to choose magnets suitable for experimenting.</p>

<p>And a little earlier in the same year (March 17), he was taken to hear
a lecture<a id="FNanchor_106" href="#Footnote_106" class="fnanchor">[106]</a> on another subject, which was also connected with his
subsequent labours, and must have impressed him not a little at the
time. This was the discovery by Adams and Leverrier simultaneously,
through a striking combination of hypothesis and calculation, of the
planet Neptune, which then first “swam into” human “ken.”</p>

<p>The magnetic experiments were continued that autumn at Glenlair, as
appears from two entries in the Diary:—</p>

<div class="blockquot">

<p><i>Sept.</i> 3.—Walk round by smiddy; gave steel to be made into bars
for magnets for James.</p>

<p><i>Sept.</i> 7.—James and Robert (Campbell) most of the time at the
smiddy, and got the magnet bars.</p>
</div>

<p>My brother perfectly remembers the magnetising of these bars of steel.</p>

<p>Lastly, in 184?—unless my memory deceives me—James had commenced the
study of chemistry, and had taken extra lessons in German.</p>

<p>There was an odd episode in our school life. To keep our education
“abreast of the requirements of<span class="pagenum" id="Page_86">[Pg 86]</span> the day,” etc., it was thought
desirable that we should have lessons in “Physical Science.” So one
of the classical masters gave them out of a text-book. The sixth and
seventh classes were taught together; and the only thing I distinctly
remember about these hours is that Maxwell and P. G. Tait seemed to
know much more about the subject than our teacher did.</p>

<p>Maxwell and Tait were by this time acknowledged as the two best
mathematicians of the school, and it was already prophesied that Tait,
who was about fifteen, would some day be a Senior Wrangler. The two
youths had many interchanges of ideas, and Professor Tait remembers
that Maxwell had by this time proved, by purely geometrical methods,
that the central tangential section of a “tore,” or anchorring, is a
pair of intersecting equal and similar curves, <i>probably circles</i>.</p>

<p>This is referred to in the following extract from Professor Tait’s
admirable summary:—</p>

<div class="blockquot">

<p>When I first made Clerk Maxwell’s acquaintance about thirty-five years
ago, at the Edinburgh Academy, he was a year before me, being in the
fifth class while I was in the fourth.</p>

<p>At school he was at first regarded as shy and rather dull. He made
no friendships, and he spent his occasional holidays in reading
old ballads, drawing curious diagrams, and making rude mechanical
models. This absorption in such pursuits, totally unintelligible to
his schoolfellows (who were then quite innocent of mathematics), of
course procured him a not very complimentary nickname, which I know is
still remembered by many Fellows of this Society. About the middle of
his school career, however, he surprised his companions by suddenly
becoming one of the most<span class="pagenum" id="Page_87">[Pg 87]</span> brilliant among them, gaining high, and
sometimes the highest, prizes for scholarship, mathematics, and English
verse composition. From this time forward I became very intimate with
him, and we discussed together, with school-boy enthusiasm, numerous
curious problems, among which I remember particularly the various plane
sections of a ring or tore, and the form of a cylindrical mirror which
should show one his own image unperverted. I still possess some of
the MSS. we exchanged in 1846 and early in 1847. Those by Maxwell are
on “The Conical Pendulum,” “Descartes’ Ovals,” “Meloid and Apioid,”
and “Trifocal Curves.” All are drawn up in strict geometrical form,
and divided into consecutive propositions.<a id="FNanchor_107" href="#Footnote_107" class="fnanchor">[107]</a> The three latter are
connected with his first published paper, communicated by Forbes to
this Society and printed in our <i>Proceedings</i>, vol. <span class="allsmcap">II.</span>,
under the title “On the description of Oval Curves, and those having a
plurality of Foci” (1846). At the time when these papers were written
he had received no instruction in mathematics beyond a few books of
Euclid and the merest elements of Algebra.<a id="FNanchor_108" href="#Footnote_108" class="fnanchor">[108]</a></p>
</div>

<p>On the whole, he looked back to his school-days with strong affection;
and his only revenge on those who had misunderstood him was that he
understood them. To many of us, as we advance in life, the remembrance
of our early companions, except those to whom we were specially drawn,
becomes dim and shadowy. But Maxwell, by some vivid touch, has often
recalled to me the image of one and another of our schoolfellows, whose
existence I had all but forgotten.</p>

<p><span class="pagenum" id="Page_88">[Pg 88]</span></p>

<p>The following letters to his father still belong to his schoolboy
life:—</p>

<div class="blockquot">

<p class="right">[<i>April</i>] <i>1847</i>.</p>

<p>“I have identified Descartes’ ovals with mine. His first oval is an
oval with one of its foci outside; the second is a meloid with a focus
outside. It also comprehends the circle and apioid. The third is a
meloid with both foci inside; and the fourth is an oval with both foci
inside.”</p>
</div>

<figure class="figcenter width500" id="i_124" style="width: 300px;">
<img src="images/i_124.jpg" width="300" height="174" alt="A series of
small oval/heart-shaped curves numbered 1 through 4 across the top,
showing varying shapes from narrow ellipses to rounder heart-like
forms, each with two dots inside. Below, a larger curve labeled
with points A and B connected by lines suggests a geometric diagram
exploring how the curve's shape changes based on the positions of two
interior points.">
</figure>

<div class="blockquot">

<p class="nind">
He says with regard to the last that rays from A are <i>reflected</i>
to B, which I can disprove....</p>

<p>[This is interesting as a proof of the complete independence and
originality of the communication made to the Royal Society on April
6th, 1846. It is also important as an example of that love of comparing
his own results with great authorities, which made Maxwell the most
learned as well as the most original of scientific men. See above, p.
74, where Forbes promises to consult books on the subject, and the
references to Descartes in the <i>Proceedings</i>. Forbes cannot,
however, have made any very careful scrutiny into the history of
the matter, else he would have mentioned that Descartes actually
<i>figures</i> the cord by which his ovals are described, and his
process is precisely that of Maxwell.]</p>
</div>

<p><span class="pagenum" id="Page_89">[Pg 89]</span></p>

<div class="blockquot">

<p>I have made a map of the world, conical projection—</p>

<figure class="figcenter width500" id="i_125a" style="width: 300px;">
<img src="images/i_125a.jpg" width="300" height="146" alt="A two-part
geometric diagram: on the left, a semicircular grid pattern of
radiating lines beside a textured or shaded semicircular shape, and on
the right, a kite-like figure with points A, B, C, and D connected by
lines forming triangular sections with curved internal lines.">
</figure>

<p class="nind">
\(\mathrm{ACD}\) is the one cone, \(\mathrm{BCD}\) the other; the side
\(\mathrm{AC}=\) diameter of the base \(\mathrm{CD}\); therefore, when
unrolled, they are each semicircles.</p>
</div>

<figure class="figcenter width500" id="i_125b" style="width: 300px;">
<img src="images/i_125b.jpg" width="300" height="210" alt="A two-part
geometric diagram: on the left, concentric arcs radiating from point
O with labeled points B, K, C, A, and D and marked angles, and on the
right, a circle inscribed within a triangle with vertex O at top and
points A, B, C, D, and F marked with numerical angle values.">
</figure>

<div class="blockquot">

<p>To make the map take \(\mathrm{OD}=\mathrm{OD}\) and
\(\mathrm{OA}=\frac{3}{4}\) of \(\mathrm{OD}\), and describe a circle
from \(\mathrm{O}\), with radius \(\mathrm{OA}\); this is the circle
of contact. Let the longitude of a point \(\mathrm{P}=60^{\circ}\);
take \(\mathrm{AOC}\) in the map (=\(30^\circ\); let its latitude he
\(65^\circ\); subtract \(30^{\circ}\), and take the tangent of 35,
make \(\mathrm{AB}=\) tangent. \(\mathrm{B}\) is the point.</p>
</div>

<p><span class="pagenum" id="Page_90">[Pg 90]</span></p>

<p>Mr. Clerk Maxwell made inquiries early in the summer of 1847, with a
view to placing his son at College in November. In deciding not to
continue his classical training, he appears to have been chiefly guided
by some disparaging accounts of the condition of the Greek and Latin
classes in comparison with those of Logic, Mathematics, and Natural
Philosophy. The result was that in his seventeenth year Maxwell entered
the second Mathematical Class, taught by Professor Kelland, the class
of Natural Philosophy under J. D. Forbes, and the Logic Class of Sir
William Hamilton. Classical reading, however, was not by any means
relinquished, as the correspondence of 1847-50 clearly shows.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_82" href="#FNanchor_82" class="label">[82]</a> 
The boys’ nickname for the Rector, Archdeacon Williams.
Maxwell’s first interview with him was as follows:—Rector: “What part
of Galloway do you come from?” J. C. M.: “From the Yale of Urr, Ye
spell it o, err, err, or oo, err, err.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_83" href="#FNanchor_83" class="label">[83]</a> 
Ditto for Mr. Carmichael.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_84" href="#FNanchor_84" class="label">[84]</a> 
Mr. John Cay, Sheriff of Linlithgow. See above, <a href="#Page_7">p. 7.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_85" href="#FNanchor_85" class="label">[85]</a> 
These pauses in the Rector’s case were often filled, in
less guarded moments, with “What you call,” “Yes, yes,” which he had a
trick of interposing.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_86" href="#FNanchor_86" class="label">[86]</a> 
He once said to a nervous boy who had crossed his legs
and was sitting uneasily, “Ha, booy! are ye making baskets wi' your
legs?”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_87" href="#FNanchor_87" class="label">[87]</a> 
His turn for versifying may be traced back to his twelfth
year, when, in one of his quaint letters to his father, there occur
some lines (profusely illustrated) on the death of a goldfinch:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Lo! Ossian makes Comala fall and die,</div>
    <div class="verse indent0">Why should not you for Richard Goldie cry,” etc.</div>
  </div>
</div>
</div>

<p>And in September 1843, as above mentioned, he wrote for the Archers in
the “Happy Valley” a page and more of spirited verse.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_88" href="#FNanchor_88" class="label">[88]</a> 
<i>i.e.</i> A sketch from the antique.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_89" href="#FNanchor_89" class="label">[89]</a> 
Barbour’s Bruce, B. <span class="allsmcap">XX.</span>, 11. 507-10.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_90" href="#FNanchor_90" class="label">[90]</a> 
Viz. for a competition in Scripture Knowledge, which was
open to the 5th, 6th, and 7th classes. The prize was gained that year
by one of the 7th.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_91" href="#FNanchor_91" class="label">[91]</a> 
“Mathematical Prize” is added between the lines by Mr.
Clerk Maxwell, who writes a P.S. to the letter.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_92" href="#FNanchor_92" class="label">[92]</a> 
“The trial exercises,” ditto, ditto.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_93" href="#FNanchor_93" class="label">[93]</a> 
In these competitions we seem to have been allowed to
stay till we had done all we knew. Witness the following extract from
the Diary:—“1847, <i>July</i>, <i>Mon.</i> 19.—James at Academy trial
for Prize for Scripture Knowledge. Worked from 9 to 5. Lewis Campbell
and W. Tait worked till 6.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_94" href="#FNanchor_94" class="label">[94]</a> 
Sons of Colonel Fletcher of Upper Corsock.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_95" href="#FNanchor_95" class="label">[95]</a> 
“First Principles of Symmetrical Beauty,” by D. R. Hay,
<i>Blackwoods</i>, 1846.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_96" href="#FNanchor_96" class="label">[96]</a> 
Part of the entry on the same day is:—“Parliament
House.—Return with John Cay, called at Bryson’s and suggested to
Alexander Bryson my plan for pure iron by electro-precipitation from
sulphate or other salt.” It is interesting to observe this revival of
his youthful ardour for science in the old companionship, following
upon his sympathy with the efforts of his son.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_97" href="#FNanchor_97" class="label">[97]</a> 
The Optician’s.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_98" href="#FNanchor_98" class="label">[98]</a> 
See especially Forbes’s paper on the “Viscous Theory of
Glacier-Motion” in the <i>Philosophical Transactions</i> for 1846, pp.
143-210.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_99" href="#FNanchor_99" class="label">[99]</a> 
On his copy of Monk’s <i>Alcestis</i>, which we read in
the 6th class (1845-46), the owner’s name is followed by an original
distich:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Si probrum metuis, nolito tangere librum,</div>
    <div class="verse indent4">Nam magni domini nomina scripta vides.”</div>
  </div>
</div>
</div>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_100" href="#FNanchor_100" class="label">[100]</a> 
The following bit of Diary deserves to be quoted in this
connection:—“<i>1845, Saturday, December 27</i>.—Jas. dined at Miss
Cay’s. I went there to tea, taking Lewis and Robert Campbell. Then we
all went to the play—‘Antigone,’ by Miss Faucit.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_101" href="#FNanchor_101" class="label">[101]</a> 
I can only compare him to the fraternal spirit that
William Blake saw in vision “clapping its hands for joy” (Gilchrist’s
<i>Life of William Blake</i>, vol. <span class="allsmcap">I.</span> p. 59). In the talk of
that period a butterfly was always a “flutterby;” and idiotisms such as
“used to could ” and “be-you-have yourself!” were in common use.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_102" href="#FNanchor_102" class="label">[102]</a> 
The present dining-room.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_103" href="#FNanchor_103" class="label">[103]</a> 
At church he always sat preternaturally still, with one
hand lightly resting on the other, not moving a muscle, however long
the sermon might be. Days afterwards he would show, by some remark,
that the whole service, whether good or bad, had been, as it were,
photographed upon his mind.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_104" href="#FNanchor_104" class="label">[104]</a> 
He lived in Inverleith Terrace, Edinburgh.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_105" href="#FNanchor_105" class="label">[105]</a> 
So far as I can recall the order in which his ideas on
this subject were developed, the phenomena of complementary colours
came first, then the composition of white light, then the mixture of
colours (not of pigments), then polarisation and the dark lines in the
spectrum, and about the same time “the art of squinting,” stereoscopic
drawing, etc., then colour-blindness, the yellow spot on the retina,
etc.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_106" href="#FNanchor_106" class="label">[106]</a> 
The lecturer was Mr. Nichol, Professor of Astronomy
at Glasgow, the father of the distinguished Professor of English
Literature in the same University.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_107" href="#FNanchor_107" class="label">[107]</a> 
See note appended to this chapter (<a href="#Page_91">pp. 91</a>-<a href="#Page_104">104</a>)
containing two papers which must have been written about this time.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_108" href="#FNanchor_108" class="label">[108]</a> 
<i>Proceedings of the Royal Society of Edinburgh</i>.
Session 1879-80. p. 332.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_91">[Pg 91]</span></p>

<h2 class="nobreak" id="NOTE_2">NOTE.</h2>
</div>

<p class="nind">
THE two following series of propositions concerning the Ovals
belong to this period, and afford an illustration of Maxwell’s mode of
working in those early days. See above, p. 87. The only alterations
made, with the exception of corrections of obvious slips of the pen,
consist in a sparing insertion of stops. The MS., as will be seen by
the <i>facsimile</i> at p. 104, has almost no punctuation.</p>

<div class="blockquot">

<p class="nindc">I. Oval.</p>

<p>Definition 1.—If a point move in such a manner that \(m\) times its
distance from one point, together with \(n\) times its distance from
another point, may be equal to a constant quantity, it will describe a
curve called an Oval.</p>
</div>

<figure class="figright width500" id="i_127" style="width: 200px;">
<img src="images/i_127.jpg" width="200" height="455" alt="A geometric
diagram labeled 3.2 showing an oval shape with points A, B, and C
connected by lines forming a triangle inside it, alongside a separate
straight vertical line marked F at its base.">
</figure>

<div class="blockquot">

<p>Definition 2.—The two points are called the foci, and the numbers
signified by \(m\) and \(n\) are called the powers of the foci.</p>

<p>Definition 3.—The line joining the foci is called the axis.</p>


<p class="nindc"><span class="allsmcap">Proposition 1—Problem.</span></p>

<p>To describe an oval with given foci given multiples, and given constant
quantity</p>

<p>Let \(\mathrm{A}\) and \(\mathrm{B}\) be the given foci, 3 and 2 the
multiples, and \(\mathrm{EF}\) the constant quantity, it is required
to describe an oval. At \(\mathrm{A}\) and \(\mathrm{B}\) erect two
infinitely small cylinders. Take a perfectly flexible and inextensible
thread, without breadth or thickness, equal to \(\mathrm{EF}\); wind it
round the focal cylinders and another movable cylinder \(\mathrm{C}\),
so that the number of plies between \(\mathrm{A}\) and \(\mathrm{C}\)
may be equal to \(m\), that is 3, and the number between \(\mathrm{B}\)
and \(\mathrm{C}\) equal to \(n\) or 2. Now move \(\mathrm{C}\) in
such a manner that the thread may be quite tight, and an oval will be
described by the point.</p>
</div>

<p><span class="pagenum" id="Page_92">[Pg 92]</span></p>

<div class="blockquot">

<p>For take any point \(\mathrm{C}\). There are m plies of thread
between \(\mathrm{A}\) and \(\mathrm{C}\), and \(n\) plies between
\(\mathrm{B}\) and \(\mathrm{C}\), which taken together make up
the thread or the constant quantity, therefore \(m \mathrm{AC}+n
\mathrm{BC}=\mathrm{EF}\).</p>

<p>The focus \(\mathrm{A}\), which has the greatest number of plies is
called the greater focus, and \(\mathrm{B}\) is called the less focus.</p>


<p class="nindc"><span class="allsmcap">Proposition 2—Theorem.</span></p>

<p>The greater focus is always within the oval, but the less is within,
on, or without the curve, according as the distance between the foci,
multiplied by the power of the greater focus, is less equal or greater
than, the constant quantity.</p>
</div>

<figure class="figcenter width500" id="i_128" style="width: 300px;">
<img src="images/i_128.jpg" width="300" height="124" alt="A series of
three egg/oval shapes, each bisected by a vertical line from a top
point A to a bottom point, with a small circular diagram labeled x and
r to the left and a horizontal baseline connecting all the shapes at
bottom.">
</figure>

<div class="blockquot">

<p>The greater focus is always within the Oval, for suppose it to be at
\(\mathrm{A}\), Fig. 1, then \(m \mathrm{AC}+n \mathrm{BC}=\) constant
quantity \(=m \mathrm{AD}+m \mathrm{DC}+ n \mathrm{BC}\), and \(m
\mathrm{AD}+n \mathrm{DB}=\) constant quantity \(=m \mathrm{AD}+n
\mathrm{DC}+ n \mathrm{BC}=m \mathrm{AD}+m \mathrm{DC}+n \mathrm{BC}\),
and \(n \mathrm{DC}=m \mathrm{DC}\), and \(m=n\), but \(m \gt n\).</p>

<p>The less focus \(\mathrm{B}\) is within the oval when \(m
\mathrm{AB} \lt \mathrm{EF}\) the constant quantity.</p>

<p>For it is evident that \(\mathrm{BC}\, \text {(Fig.
2)}=\dfrac{\mathrm{EF}-m \mathrm{AB}}{m+n}\)</p>

<p>It is in the curve when \(m \mathrm{AB}=\mathrm{EF}\), this is evident.</p>

<p>It is without the curve when \(m \mathrm{AB}>\mathrm{EF}\), for
\(\mathrm{AC}=\dfrac{\mathrm{EF}-n \mathrm{AB}}{m-n \text {.}}\)</p>


<p class="nindc"><span class="allsmcap">Proposition 3—Theorem.</span></p>

<p>If a circle be described with a focus for a center, and the constant
quantity divided by the power of that focus for a radius, the distance
of any point of the oval from the other focus is to the distance from
the circle as the power of the central focus is to the power of the
other.</p>

<p>The circle \(\mathrm{EHP}\) is described with the centre \(\mathrm{B}\)
and radius = constant quantity, divided by the power of \(\mathrm{B}\).
At any point \(\mathrm{C}, \mathrm{AC}: \mathrm{CH}\colon\colon\) power
of \(\mathrm{B}\): power of \(\mathrm{A}\).</p>
</div>

<p><span class="pagenum" id="Page_93">[Pg 93]</span></p>

<figure class="figcenter width500" id="i_129a" style="width: 300px;">
<img src="images/i_129a.jpg" width="300" height="160" alt="A two-part
geometric diagram showing two large circles, each containing a smaller
oval-shaped curve with labeled points and intersecting lines radiating
from interior points.">
</figure>

<div class="blockquot">

<p>Let \(m=\) power of \(\mathrm{A}\), and \(n=\) power of \(\mathrm{B}, n
\mathrm{BH}=\) constant quantity \(=n \mathrm{BC} +n \mathrm{CH}\), and
\(n \mathrm{BC}+m \mathrm{AC}=\) constant quantity \(=n \mathrm{BC}+n
\mathrm{CH}\), take away \(n \mathrm{BC}\), and \(n \mathrm{HC}=m
\mathrm{AC}\), therefore \(\mathrm{HC}: \mathrm{CA}\colon\colon m: n\).
QED.</p>

<figure class="figright width500" id="i_129b" style="width: 200px;">
<img src="images/i_129b.jpg" width="200" height="205" alt="A geometric
diagram showing two concentric circles labeled P (outer) and a smaller
inner circle, with points A, B, C, and N connected by lines forming a
small triangle near the top and a line extending to the circle's edge.">
</figure>

<p>Cor. 1.—When the powers of the foci are equal the curve is an ellipse.</p>

<p>Cor. 2.—When the less focus is at an infinite distance the curve is an
ellipse, for the circle becomes a straight line; and</p>

<p>Cor. 3.—When the greater focus is at an infinite distance, the curve
is an hyperbola for the same reason.</p>
</div>

<p class="nindc"><span class="allsmcap">Proposition 4—Theorem.</span></p>

<figure class="figright width500" id="i_129c" style="width: 200px;">
<img src="images/i_129c.jpg" width="200" height="185" alt="A geometric
diagram showing two concentric circles with a smaller star-like or
triangular shape formed by points C, B, D, L, N, and A connected by
intersecting lines near the center.">
</figure>

<div class="blockquot">

<p>When the less focus is in the curve, angle will be formed equal to the
vertical angle of an isosceles triangle, of which the side is to the
perpendicular on the base, the power of the greater focus to that of
the less.</p>

<p>For let a circle be described, as in Prop. 3, it is evident
that it will pass through \(\mathrm{B}\). Take indefinitely
small arcs \(\mathrm{CB}=\mathrm{BD}\), join \(\mathrm{CA}\)
and \(\mathrm{DA}\), join \(\mathrm{EH}\). \(\mathrm{EC}:
\mathrm{EB}=\) power of \(\mathrm{B}:\) power of \(\mathrm{A}\), and
\(\mathrm{EC}=\mathrm{BO}\), therefore \(\mathrm{EB}: \mathrm{BO}\),
power of \(\mathrm{A}:\) power of \(\mathrm{B}\).</p>


<p class="nindc"><span class="allsmcap">Proposition 5—Problem.</span></p>

<p>A point \(\mathrm{A}\), and a point \(\mathrm{B}\) in the line
\(\mathrm{BC}\) being given, to find a point in the line as
\(\mathrm{D}\), so that \(m \mathrm{AD}+n \mathrm{BD}\) may be a
minimum.</p>

<p>Take a line \(\mathrm{HP}\), raise \(\mathrm{HX}\) perpendicular,
and from \(\mathrm{X}\) as a centre describe a circle with a radius
\(=\dfrac{m \mathrm{XH}}{n}\) so that \(m: n\colon\colon \mathrm{XP}:
\mathrm{XH}\).</p>
</div>

<p><span class="pagenum" id="Page_94">[Pg 94]</span></p>

<figure class="figcenter width500" id="i_130a" style="width: 300px;">
<img src="images/i_130a.jpg" width="300" height="147" alt="A geometric
diagram showing a horizontal line with multiple labeled points (B, S,
R, D, E, C) converging via straight lines to an apex point A, alongside
a right-angle construction with points b, B, and P forming a small
rectangle on the right.">
</figure>

<div class="blockquot">

<p>Draw \(\mathrm{AC}\) perpendicular to \(\mathrm{BC}\), and
make an angle \(\mathrm{CAD}\) = \(\mathrm{HPX}\). \(\mathrm{D}\)
is the required point. If not, take any point \(\mathrm{E}\)
on the opposite side of \(\mathrm{D}\) from \(\mathrm{B}\),
make \(\mathrm{AT}=\mathrm{AE}\). Join \(\mathrm{TE}\), and make
\(\mathrm{DTL}\) = right angle, then \(\mathrm{DTE}\) \(\gt\) right
angle \(\mathrm{DTL}\), because \(\mathrm{ATE}\) is less than a right
angle (1.16), therefore \(\mathrm{L}\) is within \(\mathrm{E}\).
And in the triangle \(\mathrm{DTL}, \mathrm{DTL}=\mathrm{PHX}\) and
\(\mathrm{TDL}=\mathrm{HXP}\), therefore the triangles are similar,
and \(\mathrm{TD}\): \(\mathrm{DL}= \mathrm{XH}: \mathrm{XP})=n\):
\(m;\) and \(n \mathrm{DL}=m \mathrm{DT}\), then \(n \mathrm{DE} \gt
m \mathrm{DT}\), add \(n \mathrm{BD}\) and \(m \mathrm{TA}\) or \(m
\mathrm{EA}\), then \(n \mathrm{BD}+n \mathrm{DE}+m \mathrm{EA} \gt
n \mathrm{BD}+m \mathrm{DT}+m \mathrm{TA}\) and \(n \mathrm{BD}+m
\mathrm{DA} \lt n \mathrm{BE}+m \mathrm{AE}\).</p>


<p>Now take a point \(\mathrm{R}\) on the other side. Join
\(\mathrm{AR}\), and cut off \(\mathrm{AO}=\mathrm{AD}\), make
\(\mathrm{SRD}=\mathrm{HXP}=\mathrm{ADC}\). \(\mathrm{S}\) will
be beyond \(\mathrm{AR}\). Draw \(\mathrm{DS}\) perpendicular to
\(\mathrm{AD}\), then it will be perpendicular to \(\mathrm{RS}\),
and below the line \(\mathrm{OD}\), then \(\mathrm{RSD}\) similar to
\(\mathrm{XHP}\) and \(\mathrm{RS}\): \(\mathrm{RD} = (\mathrm{XH}:
\mathrm{XP}=)\) \(n\): \(m\), and \(m \mathrm{RS}=n \mathrm{RD}\), but
\(\mathrm{SR} \lt \mathrm{RV} \lt \mathrm{RO}\) and \(n \mathrm{RD}(=m
\mathrm{RS}) \lt m \mathrm{RO}\), add \(n \mathrm{BR}\) and \(m
\mathrm{OA}\) or \(m \mathrm{DA}\), and \(n \mathrm{BR}+n \mathrm{RD}+m
\mathrm{DA} \lt n \mathrm{BR}+m \mathrm{RO}+m \mathrm{OA}\) and \(n
\mathrm{BD}+m \mathrm{DA} \lt n \mathrm{BR}+m \mathrm{RA}\). QED.</p>


<p class="nindc"><span class="allsmcap">Proposition 6—Problem.</span></p>
</div>

<figure class="figright width500" id="i_130b" style="width: 150px;">
<img src="images/i_130b.jpg" width="150" height="282" alt="A geometric
diagram showing an elongated oval or vesica shape formed by overlapping
curved arcs, with a vertical axis connecting points A at top and B at
bottom, and a diagonal line passing through a point labeled C or O on
the left side.">
</figure>

<div class="blockquot">

<p>To draw a tangent to an oval from a focus without:—</p>

<p>Take \(m\) for the power of the greater focus, and \(n\) for that
of the less, and find the angle \(\mathrm{ADB}\) (Prop. 5). Upon
\(\mathrm{AB}\) describe a segment of a circle containing an equal
angle. Join \(\mathrm{B}\) and \(\mathrm{C}\), the point where it
cuts the oval, \(\mathrm{B}\) \(\mathrm{C}\) is a tangent. For take
any point \(\mathrm{O}\), join \(\mathrm{AO}\), \(m \mathrm{AO}+n
\mathrm{OB} \gt m \mathrm{AC}+n \mathrm{CB}\), therefore \(\mathrm{O}\)
is without the oval.</p>
</div>

<p><span class="pagenum" id="Page_95">[Pg 95]</span></p>

<figure class="figcenter width500" id="i_131" style="width: 400px;">
<img src="images/i_131.jpg" width="400" height="398" alt="A complex
geometric diagram with two large overlapping circles, each containing
smaller intersecting circles and ovals, with numerous labeled points
(D, E, C, A, F, B, K, T, X) connected by an intricate web of lines.">
</figure>


<p class="nindc"><span class="allsmcap">Proposition 7—Problem.</span></p>

<div class="blockquot">

<p>To draw a tangent to a given Oval, the foci and the ratio being given:—</p>

<p>It is required to draw a tangent at \(\mathrm{C}\) to the oval
\(\mathrm{CNT}\), ratio \(m: n\). From \(\mathrm{B}\) the less
focus describe a circle as in (Prop. 3). Join \(\mathrm{CA}\),
join \(\mathrm{CB}\), and produce to \(\mathrm{D}\), then
\(\mathrm{DC}: \mathrm{CA} \colon\colon m: n\). Join \(\mathrm{AD}\)
and produce it. Bisect the angle \(\mathrm{DCA}\) by the
line \(\mathrm{CO}\). \(\mathrm{DO}:\mathrm{OA}\colon\colon
(\mathrm{DC}:\mathrm{CA}\colon\colon) m: n\). Draw \(\mathrm{CK}\)
perpendicular to \(\mathrm{CO}\), and describe the circle
\(\mathrm{OCLK}\). Because \(\mathrm{OCK}\) is a right angle,
\(\mathrm{OCK} =\mathrm{DCO}+ \mathrm{KCB}=\mathrm{OCA}+\mathrm{ACK}\).
But \(\mathrm{OCA}=\mathrm{DCO} \therefore \mathrm{KCB}=\mathrm{ACK}\)
and (6.3) \(\mathrm{KA}: \mathrm{KD} \colon\colon \mathrm{CA}:
\mathrm{CD}\colon\colon \mathrm{AO}: \mathrm{OD} \therefore
\mathrm{KA}: \mathrm{KD}\colon\colon \mathrm{AO}: \mathrm{OD}\),
and at any point \(\mathrm{L}\) in the circle, \(\mathrm{AL}:
\mathrm{DL}\colon\colon \mathrm{AO}: \mathrm{OD}(6 \mathrm{F})\),
and \(\mathrm{AL}: \mathrm{DL}\colon\colon n: m\); and the circle
is wholly without the oval, and can only touch it in the two
points \(\mathrm{C}\) and \(\mathrm{P}\), where \(\mathrm{DB}\)
cuts the oval; for suppose the circle coincided with the oval at
\(\mathrm{L}\), 
\[
\left.\begin{array}{l} \text{Join}\,
\mathrm{BL}\, \text{and produce to}\, \mathrm{X}, \text{
then}\,
\mathrm{AL}: \mathrm{DL}:: n: m \\ 
\text {And by Prop. 3} \qquad\qquad\qquad\quad \mathrm{AL}: \mathrm{XL}\colon\colon
n: m\end{array}\right\} \therefore \mathrm{DL}=\mathrm{XL};
\] 
but \(\mathrm{DL} \gt \mathrm{XL}\,(3.7)\), therefore the oval is within the
circle. Therefore draw \(\mathrm{ECF}\) a tangent to the circle, and as
it is without the circle it is without the oval.</p>
</div>

<p><span class="pagenum" id="Page_96">[Pg 96]</span></p>

<figure class="figleft width500" id="i_132a" style="width: 200px;">
<img src="images/i_132a.jpg" width="200" height="126" alt="A simple
geometric diagram showing an oval/teardrop shape with a point inside
connected by multiple lines to two points labeled with letters, forming
a fan-like arrangement of triangles.">
</figure>

<div class="blockquot">

<p><i>Scholium.</i>—Join \(\mathrm{AC}\), join \(\mathrm{BC}\), and
produce till \(\mathrm{AC}: \mathrm{CD} \colon\colon n: m\). Join
\(\mathrm{AD}\), bisect \(\mathrm{ACD}\) by \(\mathrm{CO}\). Draw
\(\mathrm{OE}\) perpendicular to \(\mathrm{AO}\). Make \(\mathrm{OCE}
= \mathrm{EOC}\). It is evident from the proposition that
\(\mathrm{ECF}\) is the tangent.</p>

<figure class="figcenter width500" id="i_132b" style="width: 300px;">
<img src="images/i_132b.jpg" width="300" height="131" alt="A geometric
diagram showing two large circles side by side, each containing smaller
intersecting curves and labeled points connected by a web of lines,
with a handwritten label Oval and S Curves near the center.">
</figure>

<p>If a line \(\mathrm{AE}\) be cut in \(\mathrm{C}\) and \(\mathrm{B}\),
so that \(\mathrm{AB}: \mathrm{BC}\colon\colon \mathrm{AE}:
\mathrm{CE}\), and two semicircles \(\mathrm{BOE}\), \(\mathrm{BXE}\)
be described on \(\mathrm{BE}\), and \(\mathrm{AO}\), \(\mathrm{CO}\)
be drawn to \(\mathrm{O}\) in the circumference, and perpendiculars
\(\mathrm{DH}\), \(\mathrm{DL}\), be drawn from the centre,
\(\mathrm{DH}: \mathrm{DL}\colon\colon \mathrm{AB}: \mathrm{BC}\).</p>

<p>For \(\mathrm{AB}: \mathrm{BC}\colon\colon \mathrm{AE}: \mathrm{CE}
\therefore \mathrm{AB}: \mathrm{AE}\colon\colon \mathrm{BC}:
\mathrm{CE} \therefore \mathrm{AE}+\mathrm{AB})= (2 \mathrm{AB}+2
\mathrm{BD})=2 \mathrm{AD}: \mathrm{AB}::(\mathrm{CE}+\mathrm{BC}=) 2
\mathrm{BD}: \mathrm{BC}\) and \(\mathrm{AD}: \mathrm{AB}\colon\colon
\mathrm{BD}: \mathrm{BC} \therefore \mathrm{AD}-\mathrm{AB}=)
\mathrm{BD}: \mathrm{AB}\colon\colon(\mathrm{BD}-\mathrm{BC}=)
\mathrm{CD}: \mathrm{BC} \therefore \mathrm{BD}:
\mathrm{CD}\colon\colon \mathrm{AB}: \mathrm{BC}\).</p>

<p>Draw \(\mathrm{DT}\) perpendicular to \(\mathrm{OB}\), then
as it bisects the base it bisects the angle \(\mathrm{ODB}\)
and \(\mathrm{ODT}=\mathrm{BDT}\), then in the triangles
\(\mathrm{OTP}\), \(\mathrm{DPL}, \mathrm{OTP}=\mathrm{DLP}\) and
\(\mathrm{OPT}=\mathrm{DPL} \therefore \mathrm{PDL}=\mathrm{POT}\).
But \(\mathrm{POT}= \mathrm{BOA}\) (6 F Cor.) and
\(\mathrm{BOA}=\mathrm{SOH}=\mathrm{PDL}\), and in the triangles
\(\mathrm{SOH}\), \(\mathrm{STD}, \mathrm{SHO}=\mathrm{STD}\), and
\(\mathrm{OSH}=\mathrm{TSD} \therefore \mathrm{SOH}=\mathrm{SDT}\)
and \(\mathrm{SDT} =\mathrm{PDL}\). But \(\mathrm{ODT}=\mathrm{BDT}
\therefore \mathrm{CDL}=\mathrm{ODH}\) and \(\mathrm{DHO}=\mathrm{DLC}
\therefore \mathrm{HOD}, \mathrm{CDL}\) are equiangular, and
\(\mathrm{HD}: \mathrm{DL}\colon\colon(\mathrm{DO}= \mathrm{BD}:
\mathrm{CD}\), but \(\mathrm{BD}: \mathrm{CD}\colon\colon \mathrm{AB}:
\mathrm{BC} \therefore \mathrm{HD}: \mathrm{DL}\colon\colon
\mathrm{AB}: \mathrm{BC}\).</p>

<p>Cor. Sine \(\mathrm{HOD}: \sin \mathrm{DOL} \colon\colon \mathrm{AB}:
\mathrm{BC}\).</p>
</div>

<figure class="figright width500" id="i_132c" style="width: 200px;">
<img src="images/i_132c.jpg" width="200" height="209" alt="A geometric
diagram showing a large circle containing a smaller oval curve with
multiple labeled points connected by intersecting lines radiating from
a central point.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 9—Theorem.</span></p>

<p>If lines be drawn from the foci to any point in the oval, the sines of
the angles which they make with the perpendicular to the tangent are to
one another as the powers of the foci.</p>

<p>\(\sin \mathrm{DCE}: \sin \mathrm{ACE} \colon\colon \text{power of}
\mathrm{A}: \text{power of} \mathrm{B}\).</p>

<p>For describe the circle \(\mathrm{CXT}\) as in Prop. 7, so that
\(\mathrm{DT}: \mathrm{TA} \colon\colon \mathrm{DX}: \mathrm{AX}\),
then \(\mathrm{SC}\) the tangent to the circle is a<span class="pagenum" id="Page_97">[Pg 97]</span> tangent to the
oval, and \(\mathrm{CE}\) the radius is perpendicular to it; then by
Prop. 8 Corollary, \(\sin \mathrm{DCE}: \sin \mathrm{ACE} \colon\colon
(\mathrm{DT}: \mathrm{TA} \colon\colon)\, \text{power of}\, \mathrm{A}:
\text{power of}\, \mathrm{B}\).</p>
</div>

<figure class="figcenter width500" id="i_133" style="width: 400px;">
<img src="images/i_133.jpg" width="400" height="444" alt="A series of
four labeled geometric diagrams showing curved lens-like or oval shapes
formed by converging lines from points to a central curve, with one
figure including horizontal parallel lines suggesting light rays.">
</figure>

<div class="blockquot">

<p>As the ratio of the sines of incidence and refraction is invariable for
the same medium, and as this ratio is as 2 to 3 in glass; and as in the
oval at Fig. 1 the powers of the foci are as 2 to 3; if the oval were
made of glass, rays of light from \(\mathrm{B}\) would be refracted to
\(\mathrm{A}\). If now a circle be described from \(\mathrm{A}\), the
case will not be altered, for the rays are perpendicular to the circle
as in fig. 2.</p>

<p>The ellipse and hyperbola, figs. 3 and 3 [<i>bis</i>], cause parallel
rays to converge, for (Prop. 3) they are ovals with one of the foci at
an infinite distance.</p>

<p>Fig. 4 is a combination of 2 hyperbolas, and rays from \(\mathrm{A}\)
are refracted to \(\mathrm{B}\).</p>
</div>

<p><span class="pagenum" id="Page_98">[Pg 98]</span></p>

<figure class="figcenter width500" id="i_134" style="width: 400px;">
<img src="images/i_134.jpg" width="400" height="376" alt="A geometric
diagram showing two concentric circles with a point inside connected
by lines to a labeled point A outside the circles, accompanied by the
inequality notation m > n.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">II. Meloid and Apioid.</span></p>

<p>If a point \(\mathrm{C}\) move so that \(m \mathrm{CA} {\sim} n
\mathrm{CB}=\mathrm{a}\) constant quantity, it will describe a curve
called a meloid when \(m \mathrm{CA} \gt n \mathrm{CB}\), and an apioid
when \(n \mathrm{CB} \gt m \mathrm{CA}\). The points \(\mathrm{A}\) and
\(\mathrm{B}\) are called the foci.</p>


<p class="nindc"><span class="allsmcap">Proposition 1—Problem.</span></p>

<p class="nindc"><i>To describe a Meloid, Fig. 1, or Apioid, Fig. 2.</i></p>

<p>Take a rigid straight rod \(\mathrm{AD}\), centered at \(\mathrm{A}\).
At \(\mathrm{D}\) erect a small cylinder upon the rod, and also another
at \(\mathrm{B}\) on the paper. Then take a flexible and inextensible
thread of such a length that \(m \mathrm{AD} {\sim} n\) times the
thread = constant quantity; then wrap the thread round \(\mathrm{B}\)
and \(\mathrm{D}\) and a movable cylinder \(\mathrm{C}\), so that there
may be \(n\) plies between \(\mathrm{B}\) and \(\mathrm{C}\), and \(m\)
plies between \(\mathrm{C}\) and \(\mathrm{D}\); if now \(\mathrm{AD}\)
be turned round and the thread kept tight, the point \(\mathrm{C}\)
will describe a meloid or apioid.</p>
</div>

<p><span class="pagenum" id="Page_99">[Pg 99]</span></p>

<figure class="figcenter width500" id="i_135a" style="width: 300px;">
<img src="images/i_135a.jpg" width="300" height="175" alt="A geometric
diagram showing an oval shape on the left connected by converging lines
to a circle and point E on the right, with intersecting curves and
labeled points S, T, X, and A.">
</figure>

<div class="blockquot">

<p>For take any point \(\mathrm{C}, m \mathrm{DC}+n \mathrm{CB}=\) thread,
and \(m \mathrm{DC}+m \mathrm{AC} =m \mathrm{AD}\); therefore take
away \(m \mathrm{DC}\), and \(n \mathrm{CB} {\sim} m \mathrm{AC}=\)
thread \(\sim m \mathrm{AD}=\) constant quantity. As \(m \gt n\),
\(\mathrm{A}\) is called the greater and \(\mathrm{B}\) the less focus.</p>
</div>

<figure class="figcenter width500" id="i_135b" style="width: 300px;">
<img src="images/i_135b.jpg" width="300" height="204" alt="A geometric
diagram showing two overlapping circles with a spiral-like curve
sweeping outward, connected by lines radiating from a central point A
to labeled points around the perimeter.">
</figure>

<p class="nindc">Proposition 2 is the same as proposition 2 of the Oval.</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 3—Theorem.</span></p>

<p>If a circle be described with a focus for a center, and the constant
difference divided by the power of that focus for a radius, the
distance of any point in the curve from the other focus is to the
distance from the circle as the power of the central focus is to the
power of the other.</p>
</div>

<p><span class="pagenum" id="Page_100">[Pg 100]</span></p>

<div class="blockquot">

<p>Let \(\mathrm{TLO}\), \(\mathrm{PXS}\) be the circles: at any point
\(\mathrm{C}, \mathrm{BC}: \mathrm{CO}\colon\colon m: n\) and
\(\mathrm{PC}: \mathrm{CA}\colon\colon m: n\).</p>

<p>For \(m \mathrm{CA} {\sim} n \mathrm{CB}=\) constant difference, but
\(m \mathrm{OA}=\) constant difference \(\therefore m \mathrm{CO}=n
\mathrm{CB}\) and \(\mathrm{BC}: \mathrm{CO}\colon\colon m: n\). QED.</p>

<p>And \(n \mathrm{BP}=\) constant difference \(\therefore m \mathrm{CA}=n
\mathrm{CP}\) and \(\mathrm{PC}: \mathrm{CA}\colon\colon m: n\). Cor.
1.—If the constant difference \(=0\) the curve is a circle. Cor.
2.—If an oval be described with a thread = constant difference,
with the same foci and the same powers as the meloid, and any line
be drawn from \(\mathrm{A}\), and \(\mathrm{CB}\), \(\mathrm{OB}\),
\(\mathrm{VB}\) be joined, the angle \(\mathrm{CBO}=\mathrm{VBO}\).</p>

<p>For \(\mathrm{BC}: \mathrm{CO}\colon\colon m: n\) and
\(\mathrm{BV}: \mathrm{VO}\colon\colon m: n \therefore \mathrm{BC}:
\mathrm{CO}\colon\colon \mathrm{BV}: \mathrm{VO} \therefore
\mathrm{BC}: \mathrm{BV}\colon\colon \mathrm{CO}: \mathrm{VO}\) and
\(\mathrm{CBO}=\mathrm{VBO}\)(6.3).</p>
</div>

<figure class="figright width500" id="i_136a" style="width: 200px;">
<img src="images/i_136a.jpg" width="200" height="235" alt="A two-part
geometric diagram: at top, a curved arc with closely clustered points
labeled D, E, B, F, and P near its peak, intersected by a dashed
vertical line; at bottom, an X formed by two crossing lines with
endpoints labeled C, L, D, T, E, and P, intersecting at a central point
A or B.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 4—Theorem.</span></p>

<p>When the less focus is in the curve, an angle will be formed = that in
the Oval (Prop. 4).</p>
</div>

<div class="blockquot">

<p>For take an indefinitely small arc \(\mathrm{DB}\) in the
circle, \(\mathrm{CBD}=\mathrm{DBE}\) (3. Cor. 2), and
\(\mathrm{LBT}=\mathrm{TBP} \therefore \mathrm{CBL}=\mathrm{EBP}\).</p>

<p>Or it may be proved as in the oval. If the greater focus \(\mathrm{A}\)
is at an infinite distance the figure will appear thus:—</p>
</div>

<figure class="figcenter width500" id="i_136b" style="width: 300px;">
<img src="images/i_136b.jpg" width="300" height="160" alt="A two-part
geometric diagram labeled Fig 6 and Fig 7, each showing a curved arc at
top with a diamond or kite-shaped figure formed by lines converging to
labeled points below, including B, C, K, and A.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 5—Theorem.</span></p>

<p>If the distance between the greater focus and the point where the axis
cuts the meloid, be to the distance between that point and the less<span class="pagenum" id="Page_101">[Pg 101]</span>
focus, in a greater proportion than the power of the greater focus to
that of the less, the curve is convex toward the greater focus at that
point, but if the proportion is less, concave.</p>

<p>Let \(\mathrm{AD}: \mathrm{DB}\colon\colon p: q\).</p>

<p>If \(\mathrm{AD}: \mathrm{DB} \gt m: n, \mathrm{CDE}\) is convex
towards \(\mathrm{A}\); but if \(\mathrm{AD}: \mathrm{DB} \lt
m: n\), it is concave towards \(\mathrm{A}. \ldots \ldots\)
Take \(\mathrm{C}\) and \(\mathrm{E}\) near \(\mathrm{D}\), and
\(\mathrm{CD}=\mathrm{DE}\). Join \(\mathrm{CE}\), \(\mathrm{CE}\)
cuts the axis in \(\mathrm{O}\). Draw the circle \(\mathrm{CLE}\) from
\(\mathrm{B}\), and \(\mathrm{CPE}\) from \(\mathrm{A}\). Also draw
\(\mathrm{HTK}\) as in Prop. 3—</p>

<p>Then \(\mathrm{BD}: \mathrm{DT}\colon\colon m: n \colon\colon
\mathrm{BC}: \mathrm{CH}\), but \(\mathrm{BC}=\mathrm{BL}\),
and \(\mathrm{CH}=\mathrm{PT} \therefore \mathrm{BD}:
\mathrm{DT}\colon\colon \mathrm{BL}: \mathrm{PT} \therefore
\mathrm{BD}: \mathrm{BL}\colon\colon \mathrm{DT}: \mathrm{PT}
\therefore \mathrm{BD}: \mathrm{BL}-\mathrm{BD}\colon\colon
\mathrm{DT}: \mathrm{PT}-\mathrm{DT} \therefore \mathrm{BD}:
\mathrm{DL}\colon\colon \mathrm{DT}: \mathrm{DP} \cdot \mathrm{BD}:
\mathrm{DT}\colon\colon \mathrm{DL}: \mathrm{DP} \therefore
\mathrm{DL}: \mathrm{DP} \colon\colon m: n\).</p>

<p>As \(\mathrm{E}\) and \(\mathrm{C}\) are very near \(\mathrm{D},
\mathrm{AD}: \mathrm{BD}\colon\colon \mathrm{AC}: \mathrm{BC}\), but
\(\mathrm{PE}=\mathrm{LE}\) and \(\mathrm{PCE}\): 2 right angles
\(\colon\colon \mathrm{PE}\): circumference of \(\mathrm{CPE}\), and
\(\mathrm{LCE}: 2 \mathrm{L} \colon\colon \mathrm{LE}\): circumference
of \(\mathrm{CLE}\), but circ. \(\mathrm{CPE}\): circ. \(\mathrm{CLE}
\colon\colon \mathrm{AC}: \mathrm{BC}\colon\colon \mathrm{AD}:
\mathrm{BD}\colon\colon p: q\) and \(\mathrm{PE}=\mathrm{LE} \therefore
\mathrm{PCE}: 2 \mathrm{L} \colon\colon q \mathrm{PE}: q\) circ. \(\mathrm{CPE}\),
and \(\mathrm{LCE}: 2 \mathrm{L} \colon\colon p \mathrm{PE}: p\) circ.
\(\mathrm{CLE}\) or \(q\) circ. \(\mathrm{CPE} \therefore \mathrm{PCE}:
\mathrm{LCE}: q \mathrm{PE}: p \mathrm{PE}: q: p \therefore
\mathrm{PCO}: \mathrm{LCO}: q: p\) and \(\mathrm{PO}: \mathrm{OL}
\colon\colon q: p\); and if \(p: q \gt m: n\), \(\mathrm{OL}:
\mathrm{OP} \gt \mathrm{DL}: \mathrm{DP}\), and \(\mathrm{D}\)
is nearer to \(\mathrm{A}\) than the line \(\mathrm{COE}\), and
\(\mathrm{CDE}\) is convex toward \(\mathrm{A}\); but if \(p: q \lt m:
n\), \(\mathrm{D}\) is on the opposite side, and it is concave.</p>
</div>

<figure class="figcenter width500" id="i_137" style="width: 300px;">
<img src="images/i_137.jpg" width="300" height="213" alt="A geometric
diagram labeled Fig 7 showing a circle on the left, a larger curved
shape in the middle, and an elongated arc on the right, with multiple
labeled points connected by a complex web of intersecting lines
spanning the figure.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 6—Problem.</span></p>

<p>To draw a tangent to a meloid or apioid from a focus without:—</p>

<p>Take \(m\) for the power of the greater focus, and n for that of the
less, and find the angle \(\mathrm{ADC}\) (Prop. 5 of the Oval) upon
\(\mathrm{AB}\) describe a<span class="pagenum" id="Page_102">[Pg 102]</span> segment \(\mathrm{ACCCB}\) containing
an equal angle. Join \(\mathrm{BC}\) and produce to \(\mathrm{H}\),
\(\mathrm{BH}\) is a tangent, for suppose \(\mathrm{H}\) to be the
end of the rod, and take any point \(\mathrm{O}, n \mathrm{CH}+m
\mathrm{CA} \lt n \mathrm{OH}+n \mathrm{OA}\), therefore \(\mathrm{O}\)
is without the curve.</p>

<p>\(\mathrm{CP}\) is an apioid, \(\mathrm{CT}\) is a circle, and
\(\mathrm{CL}\) is a meloid, with \(\mathrm{A}\) and \(\mathrm{B}\) as
foci.</p>
</div>

<figure class="figcenter width500" id="i_138" style="width: 300px;">
<img src="images/i_138.jpg" width="300" height="148" alt="A geometric
diagram showing a long triangular shape converging to a point on the
left, connected by intersecting lines to a circle on the right with
labeled points along its perimeter.">
</figure>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">Proposition 7—Problem.</span></p>

<p>To draw a tangent to an apioid from any point in the same, the foci and
the ratio being given.</p>

<p>It is required to draw a tangent to the apioid at the point
\(\mathbf{C}\). Join \(\mathrm{BC}\), and draw a circle as in Prop. 3.
Join \(\mathrm{AD}\), and produce it. Make \(\mathrm{AP}: \mathrm{PD}
\colon\colon n: m\). Join \(\mathrm{CP}\), and draw \(\mathrm{CK}\)
at right angles to \(\mathrm{PC}\). Describe a circle through
\(\mathrm{P}\), \(\mathrm{C}\), \(\mathrm{K}\), and it was proved in
Prop. 7 of the Oval that if any point \(\mathrm{O}\) be taken and
\(\mathrm{DO}\), \(\mathrm{AO}\) joined, \(\mathrm{DO}: \mathrm{AO}
\colon\colon m: n\). Suppose \(\mathrm{O}\) to be both in the
circle and in the apioid, join \(\mathrm{BO}\), then \(\mathrm{LO}:
\mathrm{AO}\colon\colon m n\), but \(\mathrm{DO}: \mathrm{AO}: m: n
\therefore \mathrm{LO}=\mathrm{DO}\), but \(\mathrm{LO} \lt \mathrm{DO}
\therefore\) the circle is without the apioid; therefore a tangent
\(\mathrm{C T}\) to the circle at \(\mathrm{C}\) is a tangent to the
apioid.</p>


<p class="nindc"><span class="allsmcap">Axiom 1.</span></p>

<p>It is possible for a circle to be described touching any given curve
internally.</p>

<p class="nindc"><span class="allsmcap">Proposition 8.</span></p>

<p>To draw a tangent to a meloid at any point \(\mathrm{C}\).</p>

<p>Case 1.—Let the curve be concave towards \(\mathrm{B}\). Describe the
circle \(\mathrm{POCK}\) as in Prop. 7: it will be wholly within the
meloid. At \(\mathrm{C}\) draw a tangent to the circle: it is also a
tangent to the meloid. For<span class="pagenum" id="Page_103">[Pg 103]</span> let \(\mathrm{RN}\) be the tangent to the
meloid, it must cut the circle (3.16), and therefore cuts the meloid.</p>
</div>

<figure class="figcenter width500" id="i_139" style="width: 400px;">
<img src="images/i_139.jpg" width="400" height="344" alt="A geometric
diagram labeled Fig. 9, Meloid showing a large circle with two
smaller overlapping circles inside, containing numerous labeled points
connected by an intricate web of intersecting lines.">
</figure>

<div class="blockquot">

<p>Case 2.—When the curve is convex towards \(\mathrm{B}\), draw a circle
\(\mathrm{V}\) as before. Draw \(\mathrm{CT}\) a tangent to the circle;
it is also a tangent to the meloid. For suppose a circle S drawn
touching the curve internally, it must touch \(\mathrm{V}\) and also
\(\mathrm{CT}\), and any other line would cut \(\mathrm{S}\). QED.</p>

<p><i>Scholium</i> (see Figs. 8 and 9).—Let \(\mathrm{M}\) be the point
Join \(\mathrm{AM}\), \(\mathrm{BM}\), cut off \(\mathrm{ME}\),
so that \(\mathrm{AM}: \mathrm{ME} \colon\colon \text{power of}
\mathrm{B}: \text{power of} \mathrm{A}\). Join \(\mathrm{AE}\),
bisect \(\mathrm{AME}\) by \(\mathrm{MH}\), make \(\mathrm{XH}\)
perpendicular, make \(\mathrm{XMH} = \mathrm{XHM}\), \(\mathrm{XM}\) is
a tangent.</p>


<p class="nindc"><span class="allsmcap">Proposition 9—Theorem.</span></p>

<p>If lines be drawn from the foci to any point in a meloid or apioid,
the sines of the angles which they make with the perpendicular to the
tangent are to one another as the powers of the foci see fig. 8, 9.</p>
</div>

<p><span class="pagenum" id="Page_104">[Pg 104]</span></p>

<figure class="figcenter width500" id="i_140" style="width: 500px;">
<img src="images/i_140.jpg" width="500" height="692" alt="A page of
geometric diagrams labeled Fig 10, Fig 11, and Fig 12, each showing
lens-shaped curves formed by converging rays to points labeled A, B,
C, D, L, and P, accompanied by handwritten mathematical annotations
describing tangent lines, foci, and refraction properties.">
<figcaption class="caption">
<p>the focus See figs 8, 9 For CY is the perpendicular to
the tangent and (Prop 8 Oval 6 or 7) Sine ACY : Sine BCY :: (AP : PD)
:: m : n</p>
<p>Fig 10 CLD is an oval for converging parallel rays to B, CPD is a oval
without AB converging the rays to A.</p>
<p>Fig 11 CLD is an oval for A, B converging rays from A to B CPD is a
second for C, B refracting the rays to C.</p>
<p>Fig 12 CHD is a circle not altering rays from A; CTD is a circle as
in Prop 8 of the oval refracting the rays as if these had come from B
PKLK is a lens of hyperbolas refracting from B to B the whole 3 lenses
refract from A to A.</p></figcaption>
</figure>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h2 class="nobreak" id="CHAPTER_V">CHAPTER V.<br>
<span class="pagenum" id="Page_105">[Pg 105]</span>
<span class="allsmcap">OPENING MANHOOD—1847 TO 1850—<i>Æt.</i> 16-19.</span></h2>
</div>

<p class="nind">
WHEN he entered the University of Edinburgh, James Clerk
Maxwell still occasioned some concern to the more conventional amongst
his friends by the originality and simplicity of his ways. His replies
in ordinary conversation were indirect and enigmatical, often uttered
with hesitation and in a monotonous key.<a id="FNanchor_109" href="#Footnote_109" class="fnanchor">[109]</a> While extremely neat in
his person, he had a rooted objection to the vanities of starch and
gloves. He had a pious horror of destroying anything—even a scrap of
writing paper. He preferred travelling by the third class in railway
journeys, saying he liked a hard seat. When at table he often seemed
abstracted from what was going on, being absorbed in observing the
effects of refracted light in the finger-glasses, or in trying some
experiment with his eyes—seeing round a corner, making invisible
stereoscopes, and the like. Miss Cay used to call his attention by
crying, “Jamsie, you’re in a prop.”<a id="FNanchor_110" href="#Footnote_110" class="fnanchor">[110]</a> He never tasted wine; and
he spoke to gentle<span class="pagenum" id="Page_106">[Pg 106]</span> and simple in exactly the same tone. On the
other hand, his teachers—Forbes above all—had formed the highest
opinion<a id="FNanchor_111" href="#Footnote_111" class="fnanchor">[111]</a> of his intellectual originality and force; and a few
experienced observers, in watching his devotion to his father, began
to have some inkling of his heroic singleness of heart. To his college
companions, whom he could now select at will, his quaint humour was an
endless delight. His chief associates, after I went to the University
of Glasgow, were my brother, Robert Campbell (still at the Academy), P.
G. Tait, and Allan Stewart.<a id="FNanchor_112" href="#Footnote_112" class="fnanchor">[112]</a> Tait went to Peterhouse, Cambridge, in
1848, after one session of the University of Edinburgh; Stewart to the
same College in 1849; Maxwell did not go up until 1850.</p>

<div class="sidenote"><i>Æt.</i> 16-19.</div>

<p>These three years—November 1847 to October 1850—were impartially
divided between Edinburgh and Glenlair. He was working under but
slight pressure, and his originality had the freest play. His studies
were multifarious, but the subjects on which his thoughts were
most concentrated during these years were—1. Polarised light, the
stereoscope, etc.; 2. Galvanism; 3. Rolling curves; 4. Compression
of solids. That he early felt the necessity of imposing a method on
himself will appear from the letters. His paper on Rolling Curves was
read before the Edinburgh Royal Society on February 19th, 1849, by
Professor Kelland (for it was not thought proper for<span class="pagenum" id="Page_107">[Pg 107]</span> a boy in a round
jacket to mount the rostrum there); that on the Equilibrium of Elastic
Solids in the spring of 1850.</p>

<p>With regard to his class studies, it appears that he attended Forbes
for two sessions as a regular student, and occasionally as an amateur
student in his third year; Kelland for two sessions; and Sir W.
Hamilton for two. In his third session, while partially attending
Forbes, he was a regular student in the Classes of Chemistry (Professor
Gregory), Practical Chemistry (Mr. Kemp), and Moral Philosophy
(Professor Wilson).</p>

<p>Mr. Macfarlan of Lenzie, in the letter already quoted, says:—“He
was in the Natural Philosophy Class, Edinburgh University, the year
before I was, and was spoken of by Forbes and his fellow-students as
a discoverer in Natural Philosophy, and a very original worker in
Mathematics.”</p>

<p>All scientific theories had an interest for him. It was at some time
during these years that in a walk towards Arthur’s Seat he discoursed
to me of Owen’s hypothesis of types of creation, not only with complete
command of Owen’s terminology, but with far-reaching views of the
questions to which the theory led. On the same occasion he made some
characteristic remarks on the importance of cultivating the senses,
adding that he regarded dulness in that respect as a bad sign of any
man.</p>

<p>The lectures in Mental Philosophy, which were a prominent element in
the Scottish University curriculum, interested him greatly; and from
Sir William<span class="pagenum" id="Page_108">[Pg 108]</span> Hamilton especially he received an impulse which never
lost its effect. Though only sixteen when he entered the Logic Class,
he worked hard for it, as his letters show; and from the Class of
Metaphysics, which he attended in the following year, his mind gained
many lasting impressions.<a id="FNanchor_113" href="#Footnote_113" class="fnanchor">[113]</a> His boundless curiosity was fed by
the Professor’s inexhaustible learning; his geometrical imagination
predisposed him to accept the doctrine of “natural realism;” while his
mystical tendency was soothed by the distinction between Knowledge and
Belief. The doctrine of a muscular sense gave promise of a rational
analysis of the active powers. However strange it may appear that a
born mathematician should have been thus influenced by the enemy of
mathematics, the fact is indisputable that in his frequent excursions
into the region of speculative thought, the ideas received from Sir
William Hamilton were his habitual vantage-ground; the great difference
being, that while Sir William remained for the most part within the
sphere of Abstract Logic, Maxwell ever sought to bring each “concept”
to the test of fact. Sir William in turn took a genial interest in
his pupil, who was indeed the nephew of an old friend—Sheriff Cay
having at one-time been a constant companion and firm ally of Sir
William’s.<a id="FNanchor_114" href="#Footnote_114" class="fnanchor">[114]</a> This is perhaps the most striking example<span class="pagenum" id="Page_109">[Pg 109]</span> of the
effect produced by Sir William Hamilton on powerful young minds,—an
effect which, unless the best metaphysicians of the subsequent age are
mistaken, must have been out of all proportion to the independent value
of his philosophy.</p>

<p>It was impossible that young Maxwell should listen to speculations
about the first principles of things,—speculations, too, which,
like all the Scottish philosophy, turned largely on the reality of
the external world,—without eagerly working out each problem for
himself. Besides various exercises done by him for the Logic Class,
and, like all his youthful work, preserved by him with pious care,
there is one which seems to have attracted special attention, and was
found by Professor Baynes, when he came to assist Sir William, in the
Professor's private drawer. This is so significant, and is so closely
related to Maxwell's after studies, as to deserve insertion here.</p>


<div class="sidenote2"><i>Æt.</i> 17.</div>

<p class="nindc space-above2"><span class="allsmcap">On the Properties of Matter.</span></p>

<p>These properties are all relative to the three abstract entities
connected with matter, namely, space, time, and force.</p>

<p>1. Since matter must be in some part of space, and in one part only at
a time, it possesses the property of locality or position.</p>

<p>2. But matter has not only position but magnitude; this property is
called extension.</p>

<p>3. And since it is not infinite it must have bounds, and therefore it
must possess figure.</p>

<p>These three properties belong both to matter and to imaginary
geometrical figures, and may be called the<span class="pagenum" id="Page_110">[Pg 110]</span> geometric properties of
matter. The following properties do not necessarily belong to geometric
figures.</p>

<p>4. No part of space can contain at the same time more than one body, or
no two bodies can coexist in the same space; this property is called
impenetrability. It was thought by some that the converse of this was
true, and that there was no part of space not filled with matter. If
there be a vacuum, said they, that is empty space, it must be either a
substance or an accident.</p>

<p>If a substance it must be created or uncreated.</p>

<p>If created it may be destroyed, while matter remains as it was, and
thus length, breadth and thickness would be destroyed while the bodies
remain at the same distance.</p>

<p>If uncreated, we are led into impiety.</p>

<p>If we say it is an accident, those who deny a vacuum challenge us
to define it, and say that length, breadth and thickness belong
exclusively to matter.</p>

<p>This is not true, for they belong also to geometric figures, which are
forms of thought and not of matter; therefore the atomists maintain
that empty space is an accident, and has not only a possible but a real
existence, and that there is more space empty than full. This has been
well stated by Lucretius.</p>

<p>5. Since there is a vacuum, motion is possible; therefore we have a
fifth property of matter called mobility.</p>

<p>And the impossibility of a body changing its state of motion or rest
without some external force is called <i>inertia</i>.</p>


<p class="space-above2">
Of forces acting between two particles of matter there are several
kinds.</p>

<p>The first kind is independent of the quality of the particles, and
depends solely on their masses and their mutual distance. Of this
kind is the attraction of gravitation and that repulsion which exists
between the particles of matter which prevents any two from coming into
contact.</p>

<p>The second kind depends on the quality of the particles; of this kind
are the attractions of magnetism, electricity, and<span class="pagenum" id="Page_111">[Pg 111]</span> chemical affinity,
which are all convertible into one another and affect all bodies.</p>

<p>The third kind acts between the particles of the same body, and tends
to keep them at a certain distance from one another and in a certain
configuration.</p>

<p>When this force is repulsive and inversely as the distance, the body is
called gaseous.</p>

<p>When it does not follow this law there are two cases.</p>

<p>There may be a force tending to preserve the figure of the body or not.</p>

<p>When this force vanishes the body is a liquid.</p>

<p>When it exists the body is solid.</p>

<p>If it is small the body is soft; if great it is hard.</p>

<p>If it recovers its figure it is elastic; if not it is inelastic.</p>

<p>The forces in this third division depend almost entirely on heat.</p>

<p class="nind">The properties of bodies relative to heat and light are—</p>

<p class="nindc">Transmission, Reflection, and Destruction,</p>

<p class="nind">
and in the case of light these may be different for the three kinds of
light, so that the properties of colour are—</p>
<p class="nindc">
Quality, Purity, and Integrity; or<br>
Hue, Tint, and Shade.
</p>

<p class="space-above2">
We come next to consider what properties of bodies may be perceived by
the senses.</p>


<p>Now the only thing which can be directly perceived by the senses is
Force, to which may be reduced heat, light, electricity, sound, and all
the things which can be perceived by any sense.</p>

<p>In the sense of sight we perceive at the same time two spheres covered
with different colours and shades. The pictures on these two spheres
have a general resemblance, but are not exactly the same; and from
a comparison of the two spheres we learn, by a kind of intuitive
geometry, the position of external objects in three dimensions.</p>

<p>Thus, the object of the sense of sight is the impression made on the
different parts of the retina by three kinds of light. By this sense
we obtain the greater part of our<span class="pagenum" id="Page_112">[Pg 112]</span> practical knowledge of locality,
extension, and figure as properties of bodies, and we actually perceive
colour and angular dimension.</p>

<p>And if we take time into account (as we must always do, for no sense is
instantaneous), we perceive relative angular motion.</p>

<p>By the sense of hearing we perceive the intensity, rapidity, and
quality of the vibrations of the surrounding medium.</p>

<p>By taste and smell we perceive the effects which liquids and aeriform
bodies have on the nerves.</p>

<p>By touch we become acquainted with many conditions and qualities of
bodies.</p>

<p>1. The actual dimensions of solid bodies in three dimensions, as
compared with the dimensions of our own bodies.</p>

<p>2. The nature of the surface; its roughness or smoothness.</p>

<p>3. The state of the body with reference to heat.</p>

<p>To this is to be referred the sensation of wetness and dryness, on
account of the close contact which fluids have with the skin.</p>

<p>By means of touch, combined with pressure and motion, we perceive—</p>

<p>1. Hardness and softness, comprehending elasticity, friability,
tenacity, flexibility, rigidity, fluidity, etc.</p>

<p>2. Friction, vibration, weight, motion, and the like.</p>

<p>The sensations of hunger and thirst, fatigue, and many others, have no
relation to the properties of bodies.</p>


<div class="poetry-container"><span class="allsmcap">Lucretius on Empty Space.</span></div>
<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Nee tamen undique corporea stipata tenentur</div>
    <div class="verse indent0">Omnia naturâ, namque est in rebus Inane.</div>
    <div class="verse indent0">Quod tibi cognôsse in multis erit utile rebus</div>
    <div class="verse indent0">Nec sinet errantem dubitare et quserere semper</div>
    <div class="verse indent0">De summâ rerum; et nostris diffidere dictis.</div>
    <div class="verse indent0">Quapropter locus est intactus Inane Yacansque</div>
    <div class="verse indent0">Quod si non esset, nullâ ratione moveri</div><span class="pagenum" id="Page_113">[Pg 113]</span>
    <div class="verse indent0">Res possent; namque officium quod corporis extat</div>
    <div class="verse indent0">Officere atque obstare, id in omni tempore adesset</div>
    <div class="verse indent0">Omnibus. Haud igitur quicquam procedere posset,</div>
    <div class="verse indent0">Principium quoniam cedendi nullâ daret res,</div>
    <div class="verse indent0">At nunc per maria ac terras sublimaque cæli</div>
    <div class="verse indent0">Multa modis multis varia ratione moveri</div>
    <div class="verse indent0">Cernimus ante oculos, quae, si non esset Inane,</div>
    <div class="verse indent0">Non tam sollicito motu privata carerent</div>
    <div class="verse indent0">Quam genita omnino nullâ ratione fuissent,</div>
    <div class="verse indent0">Undique materies quoniam stipata quiesset.<a id="FNanchor_115" href="#Footnote_115" class="fnanchor">[115]</a></div>
  </div>
</div>
</div>

<p>In connection with his logical studies it should be mentioned that
Professor Boole’s attempt, made about this time, towards giving to
logical forms a mathematical expression,<a id="FNanchor_116" href="#Footnote_116" class="fnanchor">[116]</a> had naturally strong
attractions for Clerk Maxwell.</p>

<p><span class="pagenum" id="Page_114">[Pg 114]</span></p>

<p>The metaphysical writers who had received most of his attention before
going to Cambridge were Descartes and Leibniz. He knew Hobbes well
also, but chiefly on the ethical side.</p>

<p>“When, in his address to Section A of the British Association at the
Liverpool meeting in 1870, Maxwell spoke of the barren metaphysics of
past ages, he knew the full force of his own words. And he certainly
felt that his psychological studies had given him a distinct advantage
in conceiving rightly the functions of the eye.</p>

<p>His grasp of Moral Philosophy at the age of nineteen,—when he had been
stimulated to precise thought on the subject by listening to the vague
harangues of Professor Wilson (Christopher North),—appears in some of
his letters, and reveals an aspect of his genius of which too little is
known; and one which his subsequent career did not allow him to carry
to perfection.</p>

<p>In the third year of his course, as above mentioned, besides attending
Professor Wilson’s lectures, he renewed his study of Chemistry under
Professor Gregory, to whose laboratory he had unlimited access, and
also to some extent continued his attendance on Professor Forbes.</p>

<p>It cannot be said that this period was unfruitful; yet perhaps it is to
be regretted that he did not go to Cambridge at least one year earlier.
His truly sociable spirit would have been less isolated, he would have
gained more command over his own genius, and his powers of expression
would have more harmoniously developed. The routine of Cambridge would
have<span class="pagenum" id="Page_115">[Pg 115]</span> been not only more valuable but less irksome to him, and he would
have entered sooner and more fully upon the study of mankind, for which
he had such large capacity, and opportunities hitherto so limited. He
suffered less from isolation than most human beings, and his spirit was
deepening all the while; yet the freedom of working by himself during
the summer months had manifestly some drawbacks, and the tone of his
correspondence shows that he felt the disadvantages of solitude.</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1847 to 1850—<i>Æt.</i> 16-18.</span></p>

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<div class="blockquot">

<p class="right">
27 Heriot Row,<a id="FNanchor_117" href="#Footnote_117" class="fnanchor">[117]</a><br>
<i>Tuesday</i> [<i>16th Novr.</i> 1847].</p>

<div class="sidenote2"><i>Æt.</i> 16.</div>

<p>In Kelland we find the value of expressions in numbers. as fast as we
can, the values of the letters being given; light work. In Forbes we
do Lever, which is all in Potter; no notes required, only read Pottery
ware (light reading). Logic needs long notes. On Monday, Wednesday,
Friday, I read Newton’s <i>Fluxions</i> in a sort of way, to know what
I am about in doing a prop. There is no time of reading a book better
than when you need it, and when you are on the point of finding it out
yourself if you were able.</p>

<hr class="r5">

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Non usitata nec tenui ferar</div>
    <div class="verse indent0">Pinna biformi per liquida sequora</div>
    <div class="verse indent0">Piscis neque in terris morabor</div>
    <div class="verse indent0">Longius”——but I will take to swimming</div>
  </div>
</div>
</div>
with a two formed oar with blades at right angles....

<p class="right">Yours, J. C. M., No. 2.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>31 Heriot Row, Novr.</i> 1847.</p>

<p>As you say, sir, I have no idle time. I look over<span class="pagenum" id="Page_116">[Pg 116]</span> notes and such
like till 9.35, then I go to Coll., and I always go one way and cross
streets at the same places; then at 10 comes Kelland. He is telling us
about arithmetic and how the common rules are the best. At 11 there is
Forbes, who has now finished introduction and properties of bodies,
and is beginning Mechanics in earnest. Then at 12, if it is fine, I
perambulate the Meadows; if not, I go to the Library and do references.
At 1 go to Logic. Sir W. reads the first \(\dfrac{1}{2}\) of his
lecture, and commits the rest to his man, but reserves to himself the
right of making remarks. To-day was examination day, and there was no
lecture. At 2 I go home and receive interim aliment, and do the needful
in the way of business. Then I extend notes, and read text-books, which
are Kelland’s <i>Algebra</i> and Potter’s <i>Mechanics</i>. The latter
is very trigonometrical, but not deep; and the Trig, is not needed. I
intend to read a few Greek and Latin beside. What books are you doing?
... In Logic we sit in seats lettered according to name, and Sir W.
takes and puts his hand into a jam pig<a id="FNanchor_118" href="#Footnote_118" class="fnanchor">[118]</a> full of metal letters (very
classical), and pulls one out and examines the bench of the letter. The
Logic lectures are far the most solid and take most notes.</p>
</div>

<div class="blockquot">

<p>Before I left home I found out a prop for Tait (P. G.); but he
<i>will</i> not do it. It is “to find the algebraical equation to a
curve which is to be placed with its axis vertical, and a heavy body is
to be put on any part of the curve, as on an inclined plane, and the
horizontal component of the force, by which it is actuated, is to vary
as the \(\mathrm{n}^{\text {th}}\) power of the perpendicular upon the
axis.”</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 26th April</i> 1848.</p>

<p>... On Saturday, the natural philosophers ran up Arthur’s Seat with the
barometer. The Professor set it up at the top and let us pant at it
till it ran down with drops. He did not set it straight, and made the
hill grow fifty feet; but we got it down again.</p>
</div>

<p><span class="pagenum" id="Page_117">[Pg 117]</span></p>

<div class="blockquot">

<p>We came here on Wednesday by Caledonian. I intend to open my classes
next week after the business is over. I have been reading Xenophon's
<i>Memorabilia</i> after breakfast; also a French collection book. This
from 9 to 11. Then a game of the Devil, of whom there is a duality
and a quaternity of sticks, so that I can play either conjunctly or
severally. I can jump over him and bring him round without leaving go
the sticks. I can also keep him up behind me.</p>

<p>Then I go in again to science, of which I have only just got the books
by the carrier. Hitherto I have done a prop on the slate on polarised
light. Of props I have done several.</p>

<p>1. Found the equation to a square.</p>

<p>2. The curve which Sir David Brewster sees when he squints at a wall.</p>

<p>3. A property of the parabola....</p>

<p>4. The same of the Ellipse and Hyperbola....</p>

<p>I can polarise light now by reflection or refraction in 4 ways, and get
beautiful but evanescent figures in plate glass by heating its edge. I
have not yet unannealed any glass....</p>

<p>I don’t understand how you mug<a id="FNanchor_119" href="#Footnote_119" class="fnanchor">[119]</a> straight on. I suit my muggery
to my temper that day. When I am deep I read Xenophon’s defence of
\(\Sigma \omega \kappa\); when not I read \(\Sigma \omega \kappa\)’s
witty dialogues. If I do not do this, I always find myself <i>reading
Greek</i>, that is, reading the words with all their contractions, as
a Jew reads Hebrew. I get on very rapidly; but know nothing about the
meaning, and do not even know but that I am really translating.</p>

<p>Please to write about your Prizes at College, and about coming here to
mug? You must learn the D——1.</p>

<p>Tatties is planting.—Yours, etc.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 5/6 July</i> 1848.</p>

<div class="sidenote2"><i>Æt.</i> 17.</div>

<p>I was much glad of your letter, and will be thankful for a repetition.
I understand better about your not coming.<span class="pagenum" id="Page_118">[Pg 118]</span> I have regularly set up
shop now above the wash-house at the gate, in a garret.<a id="FNanchor_120" href="#Footnote_120" class="fnanchor">[120]</a> I have an
old door set on two barrels, and two chairs, of which one is safe, and
a skylight above, which will slide up and down.</p>

<p>On the door (or table), there is a lot of howls, jugs, plates, jam
pigs,<a id="FNanchor_121" href="#Footnote_121" class="fnanchor">[121]</a> etc., containing water, salt, soda, sulphuric acid, blue
vitriol, plumbago ore; also broken glass, iron, and copper wire,
copper and zinc plate, bees’ wax, sealing wax, clay, rosin, charcoal,
a lens, a Smee’s Galvanic apparatus, and a countless variety of little
beetles, spiders, and wood lice, which fall into the different liquids
and poison themselves. I intend to get up some more galvanism in jam
pigs; but I must first copper the interiors of the pigs, so I am
experimenting on the best methods of electrotyping. So I am making
copper seals with the device of a beetle. First, I thought a beetle was
a good conductor, so I embedded one in wax (not at all cruel, because I
slew him in boiling water in which he never kicked), leaving his back
out; but he would not do. Then I took a cast of him in sealing wax,
and pressed wax into the hollow, and black-leaded it with a brush;
but neither would that do. So at last I took my fingers and rubbed
it, which I find the best way to use the black lead. Then it coppered
famously. I melt out the wax with the lens, that being the cleanest way
of getting a strong heat, so I do most things with it that need heat.
To-day I astonished the natives as follows. I took a crystal of blue
vitriol and put the lens to it, and so drove off the water, leaving
a white powder. Then I did the same to some washing soda, and mixed
the two white powders together; and made a small native spit on them,
which turned them green<a id="FNanchor_122" href="#Footnote_122" class="fnanchor">[122]</a> by a mutual exchange, thus:—1. Sulphate
of copper and carbonate of soda. 2. Sulphate of soda and carbonate of
copper (blue or green).</p>
</div>

<div class="blockquot">

<p>With regard to electro-magnetism you may tell Bob that I have not begun
the machine he speaks of, being occupied with better plans, one of
which is rather down cast, however,<span class="pagenum" id="Page_119">[Pg 119]</span> because the machine when tried
went a bit and stuck; and I did not find out the impediment till I had
dreamt over it properly, which I consider the best mode of resolving
difficulties of a particular kind, which may be found out by thought,
or especially by the laws of association. Thus, you are going along
the road with a key in your pocket. You hear a clink behind you, but
do not look round, thinking it is nothing particular; when you get
home the key is gone; so you dream it all over, and though you have
forgotten everything else, you remember the look of the place, but do
not remember the locality (that is, as thus, “Near a large thistle on
the left side of the road”—nowhere in particular, but so that it can
be found). Next day comes a woman from the peats who has found the key
in a corresponding place. This is not “believing in dreams,” for the
dream did not point out the place by the general locality, but by the
lie of the ground.</p>

<p>Please to write and tell how Academy matters go, if they are coming to
a head. I am reading Herodotus, <i>Euterpe</i>, having taken the turn;
that is to say, that sometimes I can do props, read diff. and Int.
Calc., Poisson, Hamilton’s dissertations, etc. Off, then I take back
to experiments, history of what you may call it, make up leeway in the
newspapers, read Herodotus, and draw the figures of the curves above. O
deary, 11 <span class="allsmcap">p.m.</span>! Hoping to see you <i>before</i> October.... I
defer till to-morrow.</p>

<p><i>July 6</i>. To-day I have set on to the coppering of the jam pig
which I polished yesterday.</p>
</div>

<figure class="figcenter width500" id="i_155" style="width: 300px;">
<img src="images/i_155.jpg" width="300" height="87" alt="A simple
line-drawing diagram showing two cylindrical objects connected by
a curved tube or hose passing over a small rectangular box, with a
wire or rod extending from the right cylinder and lines indicating
connections on the left.">
</figure>

<div class="blockquot">

<p>I have stuck in the wires better than ever, and it is going on at a
great rate, being a rainy day, and the skylight shut and a smell of
Hydrogen gas. I have left it for an hour to read Poisson, as I am
pleased with him to-day.<span class="pagenum" id="Page_120">[Pg 120]</span> Sometimes I do not like him, because he
pretends to give information as to calculations of sorts, whereas he
only tells how it might be done if you were allowed an infinite time
to do it in, as well as patience. Of course he never stoops to give a
particular example or even class of them. He tells lies about the way
people make barometers, etc.</p>

<p>I bathe regularly every day when dry, and try aquatic experiments.</p>

<p>I first made a survey of the pool, and took soundings and marked rocky
places well, as the water is so brown that one cannot see one’s knees
(pure peat, not mud). People are cutting peats now. So I have found a
way of swimming round the pool without knocking knees. The lads<a id="FNanchor_123" href="#Footnote_123" class="fnanchor">[123]</a>
are afraid of melting, except one. No one here would touch water if
they could help it, because there are two or three eels in the pool,
which are thought near as bad as adders.</p>

<p>I took down the clay gun and made a centrifugal pump of it; also tried
experiments on sound under water, which is very distinct, and I can
understand how fishes can be stunned by knocking a stone.</p>

<p>We sometimes get a rope, which I take hold of at one end, and Bob
Fraser the other, standing on the rock; and after a flood, when the
water is up, there is sufficient current to keep me up like a kite
without striking at all.</p>

<p>The thermometer ranged yesterday from 35° to 69°.</p>

<p>I have made regular figures of 14, 26, 32, 38, 62, and 102 sides of
cardboard.</p>

<p>Latest intelligence—Electric Telegraph. This is going so as to make a
compass spin very much. I must go to see my pig, as it is an hour and
half since I left it; so, sir, am your affib. friend,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 22d Sept 1848.</i></p>

<p>... When I waken I do so either at 5.45 or 9.15, but I now prefer the
early hour, as I take the most of my violent exercise at that time,
and thus am <i>saddened down</i>, so that I<span class="pagenum" id="Page_121">[Pg 121]</span> can do as much still
work afterwards as is requisite, whereas if I was to sit still in the
morning I would be yawning all day. So I get up and see what kind of
day it is, and what field works are to be done; then I catch the pony
and bring up the water barrel.<a id="FNanchor_124" href="#Footnote_124" class="fnanchor">[124]</a> This barrel used to be pulled by
the men, but Pa caused the road to be gravelled, and so it became horse
work to the men, so I proposed the pony; but all the men except the
pullers opposed the plan. So I and the children not working brought
it up, and silenced vile insinuators. Then I take the dogs out, and
then look round the garden for fruit and seeds, and paddle about till
breakfast time; after that take up Cicero and see if I can understand
him. If so, I read till I stick; if not, I set to Xen. or Herodotus.
Then I do props, chiefly on rolling curves, on which subject I have got
a great problem divided into Orders, Genera, Species, Varieties, etc.</p>
</div>

<div class="blockquot">

<p>One curve rolls on another, and with a particular point traces out a
third curve on the plane of the first, then the problem is:—Order I.
Given any two of these curves, to find the third.</p>

<p>Order II. Given the equation of one and the identity of the other two,
find their equation.</p>

<p>Order III. Given all three curves the same, find them. In this last
Order I have proved that the equi-angular spiral possesses the
property, and that no other curve does. This is the most reproductive
curve of any. I think John Bernoulli had it on his tombstone, with
the motto <i>Eadem mutata resurgo</i>. There are a great many curious
properties of curves connected with rolling. Thus, for example,—</p>

<p>If the curve A when rolled on a straight line produces a curve C, and
if the curve A when rolled up on itself produces the curve B, then the
curve B when rolled upon the curve C will produce a straight line.</p>

<p>Thus, let the involute of the circle be represented by A, the spiral of
Archimedes by B, and the parabola by C, then the proposition is true.<span class="pagenum" id="Page_122">[Pg 122]</span>
Thus the parabola rolled on a straight line traces a Catenary with its
focus, an easy way to describe the Catenary. Professor Wallace just
missed it in a paper in the Royal Society.</p>

<p>After props come optics, and principally polarised light.</p>

<p>Do you remember our visit to Mr. Nicol? I have got plenty of unannealed
glass of different shapes, for I find window glass will do very well
made up in bundles. I cut out triangles, squares, etc., with a diamond,
about 8 or 9 of a kind, and take them to the kitchen, and put them on
a piece of iron in the fire one by one. When the bit is red hot, I
drop it into a plate of iron sparks to cool, and so on till all are
done. I have got all figures up to nonagons, triangles of all kinds,
and irregular chips. I have made a pattern for a tesselated window of
unannealed glass in the proper colours, also a delineation of triangles
at every principal inclination. We were at Castle-Douglas yesterday,
and got crystals of salt Peter, which I have been cutting up into
plates to-day, in hopes to see rings. There are very few crystals which
are not hollow-hearted or filled up with irregular crystals. I have
got a few cross cuts like \(\unicode{x2b21}\) free of irregularities
and long [wedge-shaped] cuts for polarising plates. One has to be very
cautious in sawing and polishing them, for they are very brittle.</p>
</div>

<figure class="figcenter width500" id="i_158" style="width: 300px;">
<img src="images/i_158.jpg" width="300" height="86" alt="A simple
geometric diagram showing a cylindrical tube with a triangular wedge
shape and shaded triangular section at its left end, marked with a
small square labeled D, and a vertical arrow indicating measurement at
the right end.">
</figure>

<div class="blockquot">

<p>I have got a lucifer match box fitted up for polarising, thus. The rays
suffer two reflections at the polarising angle from glasses A and B.
Without the lid it does for an analysing plate. Tn the lid there is
set a plate of mica, and so one observes the blue sky, and turns the
box round till a particular colour appears, and then a line on the lid
of the box points to the sun wherever he is. Thus one can find out the
time of day without the sun.<span class="pagenum" id="Page_123">[Pg 123]</span> [<i>Here follow thirteen diagrams of
patterns in triangles, squares, pentagons, and hexagons.</i>] These are
a few of the figures one sees in unannealed glass.</p>

<p>Pray write soon and tell when, how, and where by, you intend to come,
that you may neither on the other hand fall upon us at unawares, nor on
the one hand break and not come at all. I suppose when you come I will
have to give up all my things of my own devizing, and take Poisson, for
the time is short, and I am very nearly unprepared in actual reading,
though a great deal more able to read it.</p>

<p>I hope not to write any more letters till you come. I seal with an
electrotype of the young of the ephemera. So, sir, I was, etc.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Bannavie, 6th July</i> [<i>1849</i>].</p>

<div class="sidenote2"><i>Æt.</i> 18.</div>

<p>This being a wet night, and I having exhausted my travelling props,
set to write to you about what I can recollect of my past history. It
is curious that though the remembrance of ploys remains longer than
that of home doings, it is not so easily <i>imagined</i> after a short
interval.</p>

<p>By <i>imagining</i> is here meant bringing up an accurate image of
thoughts, words, and works, and not a mere geographical summary of
voyages and travels.</p>

<p>But to the point. Perhaps you remember going with my Uncle John Cay
(7th Class), to visit Mr. Nicol in Inverleith Terrace. There we saw
polarised light in abundance. I purposed going this session but was
prevented. Well, sir, I received from the aforesaid Mr. Cay a “Nicol’s
prism,” which Nicol had made and sent him. It is made of calc-spar,
so arranged as to separate the ordinary from the extraordinary ray.
So I adapted it to a camera lucida, and made charts of the strains in
unannealed glass.</p>

<p>I have set up the machine for showing the rings in crystals, which I
planned during your visit last year. It answers very well. I also made
some experiments on compressed jellies in illustration of my props on
that subject The principal one was this:—The jelly is poured while
hot<span class="pagenum" id="Page_124">[Pg 124]</span> into the annular space contained between a paper cylinder and a
cork: then, when cold, the cork is twisted round, and the jelly exposed
to polarised light, when a transverse cross, x, not +, appears with
rings as the inverse square of the radius, all which is fully verified.
Hip! etc. Q.E.D.</p>
</div>

<figure class="figleft width500" id="i_160" style="width: 150px;">
<img src="images/i_160.jpg" width="150" height="147" alt="A simple
geometric diagram showing two concentric circles with a textured,
hatched ring pattern between them, divided into four segments by
diagonal lines crossing through the center.">
</figure>

<div class="blockquot">

<p>But to make an <i>abrupt transcision</i>,<a id="FNanchor_125" href="#Footnote_125" class="fnanchor">[125]</a> as Forbes says, we set
off to Glasgow on Monday 2d; to Inverary on 3d; to Oban by Loch Awe
on 4th; round Mull, by Staffa and Iona, on (5th), and here on 6th.
To-morrow we intend to get to Inverness and rest there. On Monday
perhaps? to the land of Beulah, and afterwards back by Caledon. Canal
to Crinan Canal, and so to Arran, thence to Ardrossan, and then home.
It is possible that you may get a more full account of all these things
(if agreeable), when I fall in with a pen that will spell; my present
instrument partakes of the nature of skates, and I can hardly steer it.</p>

<p>There is a beautiful base here for measuring the height, etc., of Ben
Nevis. It is a straight and level road through a moss for about a mile
that leads from the inn right to the summit.</p>

<p>It is proposed to carry up stones and erect a cairn 3 feet high, and
thus render it the highest mountain in Scotland.</p>

<p>During the session Prof. Forbes gave as an exercise to describe a
cycloid from top of Ben Nevis to Fort William, and slide trees down it.
We took an observation of the slide, but found nothing to slide but
snow.</p>

<p>I think a body <i>deprived</i> of friction would go to Fort William in
a cycloid in 49·6 seconds, and in 81 on an inclined plane. I believe I
should have written the greater part of this letter to Allan Stewart,
but I know not where he is, so you get it, and may read it or no as you
like.</p>

<p>We will be at home between the 15th and 22d of this month, so you may
write then, detailing your plans and specifying whether you intend to
come north at all between this and November, for we would be glad if
either you or Bob would disturb our solitude.</p>
</div>

<p><span class="pagenum" id="Page_125">[Pg 125]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 19th October 1849.</i></p>

<p>Here is the way to dissolve any given historical event in a mythical
solution, and then precipitate the seminal ideas in their primitive
form. It is from Theodore Parker, an American, and treats of the
declaration of American Independence. “The story of the Declaration
of Independence is liable to many objections if we examine it <i>à
la mode</i> Strauss. The Congress was held at a mythical town, whose
very name is suspicious,—Philadelphia, brotherly love. The date is
suspicious: it was the fourth day of the fourth month (reckoning
from April, as it is probable that the Heraclidae and Scandinavians,
possible that the Americans, and certain that the Ebrews, did). Now 4
was a sacred number among Americans: the President was chosen for 4
years, 4 departments of affairs, 4 political powers, etc. The year also
is suspicious. 1776 is but an <i>ingeni</i>[<i>ous</i>]? combination of
the sacred number, thus—</p>

<table class="autotable">
<tbody><tr>
<td class="tdr">444</td>
</tr><tr>
<td class="tdr bb">&nbsp;&nbsp;4</td>
</tr><tr>
<td class="tdr">1776</td>
</tr>
</tbody>
</table>

<p class="nind">
Still further, the declaration is metaphysical and presupposes an
acquaintance with the transcendental function on the part of the
American people. Now the <i>Kritik of Pure Reason</i> was not yet
published,” etc.</p>


<figure class="figright width500" id="i_162" style="width: 150px;">
<img src="images/i_162.jpg" width="150" height="325" alt="A
geometric line drawing depicting a twisted, hourglass-like surface
with two circular disks at top and bottom connected by curving,
hyperboloid-shaped lines that spiral around a narrow waist in the
middle.">
<figcaption class="caption">
<p>This is the likeness of a <span class="allsmcap">SKEW SCREW SURFACE</span>.</p>
</figcaption>
</figure>

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>October 1849.</i></p>

<p>Since last letter, I have made some pairs of diagrams representing
solid figures and curves drawn in space; of these pictures one is seen
with each eye by means of mirrors, thus....</p>

<p>This is Wheatstone’s Stereoscope, which Sir David Brewster has taken up
of late with much violence at the Brightish Association. (The violence
consists in making two lenses out of one by breaking it). (See Report).
Last winter he exhibited at the Scottish Society of Arts Calotype<span class="pagenum" id="Page_126">[Pg 126]</span>
pictures of the statue of Ariadne and the beast seen from two stations,
which, when viewed properly, appeared very solid.</p>
</div>


<div class="blockquot">

<p>Since then I have been doing practical props on compression, and
writing out the same that there may be no mistake. The nicest cases
are those of spheres and cylinders. I have got an expression for the
hardness of a cricket ball made of case and stuffing. I have also the
equations for a spherical cavity in an infinite solid, and this prop:
Given that the polarised colour of any part of a cylinder of unannealed
glass is equal to the square of the distance from the centre (as
determined by observation), to find—1st, the state of strain at each
point; 2d, the temperature of each.</p>

<hr class="r5">

<p>I have got an observation of the latitude just now with a saucer of
treacle, but it is very windy.</p>

<p>Pray excuse this wickedly perplexed letter as an effect of the paucity
of our communications. If you would sharpen me a little it would be
acceptable, but when there is nobody to speak to one [<i>loses</i>] the
gift of speech....</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>31 Heriot Row, Edinburgh, N.B., Monday, Nov. 5, 1849.</i></p>

<p>I go to Gregory to Chemistry at 10, Morale Phil, at 12, and Pract.
Chem. at 13, finishing at 14, unless perhaps I take an hour at
Practical Mechanics at the School of Arts. I do not go to Sir W. H.
logic, seeing I was there before.<span class="pagenum" id="Page_127">[Pg 127]</span> Langhorne has got your Buchananic
notes. Why do you think that I can endure nothing but Mathematics and
Logic, the only things I have plenty of? and why do you presuppose my
acquaintance with your preceptors, professors, tutors,<a id="FNanchor_126" href="#Footnote_126" class="fnanchor">[126]</a> etc.? ...</p>

<p>I don’t wonder at your failing to take interest in the exponential
theorem, seeing I dislike it, although I know the use and meaning of
it. But I never <i>would have</i>, unless Kelland had explained it....</p>

<p>In your next letter you may give an abstract of Aristotle’s
<i>Rhet.</i>, for I do not attend Aytoun, and so I know not what Rhet.
is. I know Logic only by Reid's account of it. I will tell you about
Wilson’s Moral Philosophy, provided always you want to know, and
signify your desire.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right">[<i>Edin</i>] <i>14th March 1850.</i></p>

<p>As I am otherwise engaged, I take this opportunity of provoking you
to write a letter or two. I have begun to write Elastic Equilibrium,
and I find that I must write you a letter in order <i>at least,
indeed,</i><a id="FNanchor_127" href="#Footnote_127" class="fnanchor">[127]</a> to serve <i>on the one hand</i> as an excuse to myself
for sticking up, and <i>on the other hand</i> as a sluice for all the
nonsense which I would have written. I therefore propose to divide this
letter as follows:—My say naturally breaks up into—1. Education; 2.
Notions; 3. Hearsay.</p>
</div>

<div class="blockquot">

<p>1. Education—Public.</p>

<p>10-11.—Gregory is on Alloys of Metals just now. Last Saturday I was
examined, and asked how I would do if the contents of a stomach were
submitted to me to detect arsenic, and I had to go through the whole
of the preparatory processes of chopping up the tripes, boiling with
potash, filtering, boiling with \(\mathrm{HCL}\) and \(\mathrm{KOCL}
\mathrm{O}_{5}\), all which Kemp the <i>Practical</i> says are useless
and detrimental processes, invented by chemists who want something to
do. 11-12.—Prof. Forbes is on Sound and Light day about, as Bob well
knows, and can tell you if he chooses. He (B. C.) has written an essay<span class="pagenum" id="Page_128">[Pg 128]</span>
on Probabilities, with very grand props in it; everything original,
but no signs of reading, I guess. It was all written in a week. He
has despaired of Optics.—12-1. Wilson, after having fully explained
his own opinions, has proceeded to those of other great men: Plato,
Aristotle, Stoics, Epicureans. He shows that Plato’s <i>proof</i> of
the immortality of the soul, from its immateriality, if it be a proof,
proves its pre-existence, the immortality of beasts and vegetables,
and why not transmigration? (Do you remember how Raphael tells Adam
about meats and drinks in <i>Paradise Lost</i>?) (Greek Iambics, if you
please.) He quarrels with Aristotle’s doctrine of the Golden Mean,—“a
virtue is the mean between two vices,”—not properly understanding the
saying. He chooses to consider it as a pocket rule to find virtue,
which it is not meant to be, but an apophthegm or maxim, or dark
saying, signifying that as a hill falls away on both sides of the top,
so a virtue at its maximum declines by excess or defect (not of virtue
but) of some variable quantity at the disposal of the will Thus, let
it be a virtue to give alms with your own money, then it is a greater
virtue to pay one’s debts to the full. Now, a man has so much money:
the more alms he gives up to a certain point, the more virtue. As soon
as it becomes impossible to pay debts, the virtue of solvency decreases
faster than that of alms-giving increases, so that the giving of money
to the poor becomes a vice, so that the variable is the sum given
away, by excess or defect of which virtue diminishes, say I; so that
Wilson garbles Aristotle,—but I bamboozle myself. I say that some
things are virtues, others are virtuous or generally lead to virtue.
Substitute <i>goods</i> for virtues, and it will be more general: thus,
Wisdom, Happiness, Virtue, are <i>goods</i>, and cannot be in excess;
but Knowledge, Pleasure, and—what? (please tell me, Is it Propriety,
Obedience, or what is it?) lead to the other three, and are not so much
goods as tending to good; whereas particular knowledges, pleasures,
and obediences may be in excess and lead to evils. I postpone the rest
of my observations to my Collection of the Metaphysical principles
of Moral Philosophy founded on<span class="pagenum" id="Page_129">[Pg 129]</span> the three laws of Liberty, Equality,
Fraternity, thus expressed:—</p>

<p>1. That which can be done is that which has been done; that is, that
the possibility (with respect to the agent) of an action (as simple)
depends on the agent having had the sensation of having done it.<a id="FNanchor_128" href="#Footnote_128" class="fnanchor">[128]</a></p>

<p>2. That which ought to be done is that which (under the given
conditions) produces, implies, or tends to the greatest amount of good
(an excess or defect in the variables will lessen the good and make
evil).</p>

<p>3. Moral actions can be judged of only by the principle of exchange;
that is (1), our own actions must be judged by the laws we have made
for others; (2), others must be judged by putting ourselves in their
place.</p>


<p class="right"><i>22d March.</i></p>

<p>At Practical Mechanics I have been turning Devils of sorts. For
private studies I have been reading Young’s <i>Lectures</i>,
Willis’s <i>Principles of Mechanism</i>, Moseley’s <i>Engineering
and Mechanics</i>, Dixon on <i>Heat</i>, and Moigno’s <i>Répertoire
d'Optique</i>. This last is a very complete analysis of all that has
been done in the optical way from Fresnel to the end of 1849, and there
is another volume a-coming which will complete the work. There is in it
besides common optics all about the other things which accompany light,
as heat, chemical action, photographic rays, action on vegetables, etc.</p>

<p>My notions are rather few, as I do not <i>entertain</i> them just
now. I have a notion for the torsion of wires and rods, not to be
made till the vacation; of experiments on the action of compression
on glass, jelly, etc., numerically done up; of papers for the
Physico-Mathematical Society (which is to revive in earnest next
session!); on the relations of optical and mechanical constants, their
desirableness, etc., and suspension-bridges, and catenaries, and
elastic curves. Alex. Campbell, Agnew, and I are appointed to read up
the subject<span class="pagenum" id="Page_130">[Pg 130]</span> of periodical shooting stars, and to prepare a list of
the phenomena to be observed on the 9th August and 13th November. The
Society’s barometer is to be taken up Arthur’s Seat at the end of the
session, when Forbes goes up, and All students are invited to attend,
so that the existence of the Society may be recognised.</p>

<p>I have notions of reading the whole of <i>Corpus Juris</i> and Pandects
in no time at all; but these are getting somewhat dim, as the Cambridge
scheme has been howked up from its repose in the regions of abortions,
and is as far forward as an inspection of the Cambridge <i>Calendar</i>
and a communication with Cantabs.</p>

<p>Mr. Bob is choosing his college. I rejected for him all but Peter’s,
Caius, or Trinity Hall, the last being, though legal, not in favour,
or lazy, or something. Caius is populous, and is society to itself.
Peter’s is select, and knows the University. Please give me some
notions on these things, both for Bob and me. I postpone my answer
to you about the Gorham business till another time, when also I
shall have read Waterland on <i>Regeneration</i>, which is with Mrs.
Morrieson, and some Pusey books I know. In the meantime I admire the
<i>Judgement</i> as a composition of great art and ingenuity.</p>
</div>

<hr class="tb">

<p>What cross influences had delayed his entrance at Cambridge may be
guessed at, but cannot be clearly known. Mr. Clerk Maxwell was always
slow in making up his mind, and the habit of <i>inertia</i> had grown
upon him. There had been a lingering expectation, to which James
alludes in the preceding letter, that he would follow his father's
profession, and become a member of the Scottish Bar. And although he
himself felt, as he told me at the time, that it was “another kind
of laws” he was called upon to study, the practical result of this
conviction was slow in asserting<span class="pagenum" id="Page_131">[Pg 131]</span> itself. The fact that in going to
Cambridge he decided against the profession which his friends had
destined for him made the step a more serious one than it might have
otherwise been. The close and constant intercourse between father and
son made the parting more difficult. James’s delicate health<a id="FNanchor_129" href="#Footnote_129" class="fnanchor">[129]</a> would
count heavily amongst the reasons <i>contra</i>, and certain floating
prejudices about the “dangers of the English universities,” Puseyism,
infidelity, etc., had then considerable hold, especially on the
Presbyterian mind. James himself was patient, and had hitherto decided
nothing for himself. Only when Tait and Allan Stewart were already at
Cambridge, my brother Robert destined for it, and myself at Oxford, his
own voice was added to those which had long been urging the claims of
Cambridge,<a id="FNanchor_130" href="#Footnote_130" class="fnanchor">[130]</a> and then they prevailed. There had been searchings of
heart on the subject as early as April 1849, when the following entries
occur in the Diary:—</p>

<p><span class="pagenum" id="Page_132">[Pg 132]</span></p>

<div class="blockquot">

<p>T. 17.—Called on Hugh Blackburn to talk about Cambridge.</p>

<p>W. 18.—Called on Capt. Wemyss to talk of Cambridge, and Prof. Forbes
called on me and had a talk on James’s studies, etc.</p>
</div>

<p>The only other document at my command which bears upon the point
is a journal kept by my mother, then Mrs. Morrieson, in which she
occasionally noted matters relating to her sons’ friends. She was
herself at this time (1850) making inquiries about Cambridge for my
brother Robert. The following entries may be quoted:—</p>

<div class="blockquot">

<p>1850. <i>1st April</i>.—James Clerk Maxwell came in full of Forbes’s
recommendation of Trinity College above all others at Cambridge, and
that Peterhouse was less expensive than Caius; that the latter is too
full to admit of rooms, and freshmen are obliged to lodge out.</p>

<p><i>28th October</i>.—I had a kind letter from Mr. C. M., from
Glenlair, after placing his son James at Peterhouse. He has already
distinguished himself at Edinburgh by papers on the compression of
solids, and other scientific subjects, read for him at the Royal
Society. His manners are very peculiar; but having good sense, sterling
worth, and good humour, the intercourse with a College world will rub
off his oddities. I doubt not of his becoming a distinguished man.</p>

<p><i>January</i> 1851.—James Clerk Maxwell often comes in. He is full of
genius. He went to Cambridge with Robert in October, R to Caius, James
to Peterhouse; but he is “migrating” to Trinity, and I have no doubt he
will be a distinguished Philosopher some day.</p>
</div>

<p><span class="pagenum" id="Page_133">[Pg 133]</span></p>

<p>In concluding the account of this period, I again beg leave to quote
from Professor Tait’s excellent paper:—</p>

<div class="blockquot">

<p>The winter of 1847 found us together in the classes of Forbes and
Kelland, where he highly distinguished himself. With the former he was
a particular favourite, being admitted to the free use of the class
apparatus for original experiments. He lingered here behind most of
his former associates, having spent three years at the University
of Edinburgh, working (without any assistance or supervision) with
physical and chemical apparatus, and devouring all sorts of scientific
works in the library.<a id="FNanchor_131" href="#Footnote_131" class="fnanchor">[131]</a> During this period he wrote two valuable
papers, which are published in our <i>Transactions</i>, on <i>The
Theory of Rolling Curves</i> and on <i>The Equilibrium of Elastic
Solids</i>. Thus he brought to Cambridge, in the autumn of 1850, a
mass of knowledge which was really immense for so young a man, but in
a state of disorder appalling to his methodical private tutor.<a id="FNanchor_132" href="#Footnote_132" class="fnanchor">[132]</a>
Though that tutor was William Hopkins, the pupil to a great extent
took his own way, and it may safely be said that no high wrangler of
recent years ever entered the Senate-house more imperfectly<span class="pagenum" id="Page_134">[Pg 134]</span> trained
to produce “paying” work than did Clerk Maxwell. But by sheer strength
of intellect, though with the very minimum of knowledge how to use it
to advantage under the conditions of the Examination, he obtained the
position of Second Wrangler, and was bracketed equal with the Senior
Wrangler in the higher ordeal of the Smith’s Prizes. His name appears
in the Cambridge <i>Calendar</i> as Maxwell of Trinity, but he was
originally entered at Peterhouse, and kept his first term there, in
that small but most ancient foundation which has of late furnished
Scotland with the majority of the professors of mathematics and natural
philosophy, in her four universities.</p>
</div>


<p>To the books mentioned by Professor Tait in his footnote should
be added Poisson’s <i>Mechanics</i>, which was taken out from the
Advocates’ Library 6th March 1848, and carried off into the country.
A copy of Fourier’s <i>Théorie de la Chaleur</i> was ordered through
Maclachlan, 6th April 1849, for 25s.</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, April to September 1850.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Glenlair, 26th April 1850.</i></p>

<p>As I ought to tell you of our departure from Edinburgh and arrival
here, so I ought to tell you of many other things besides. Of things
pertaining to myself there are these:—The tutor of Peterhouse has
booked me, and I am booked for Peterhouse, but will need a little more
booking before I can write Algebra like a book.</p>

<p>I suppose I must go through Wrigley’s problems and Paley’s Evidences
in the same sort of way, and be able to translate when required Eurip.
<i>Iph. in Aulid</i>. In the meantime I have my usual superfluity of
plans.</p>

<p>1. Classics—Eurip. \(\mathrm{I}\varphi\). \(\epsilon \nu\)
\(\mathrm{Α}\nu \lambda\) for Cambridge. (I hope no Latin or Greek
verses except for honours.) Greek<span class="pagenum" id="Page_135">[Pg 135]</span> Testament, Epistles, for my own
behoof, and perhaps some of Cicero <i>De Officiis</i> or something else
for Latin.</p>

<p>2. Mathematics—Wrigley’s Problems, and Trig, for Cambridge; properties
of the Ellipsoid and other solids for practice with Spher. Trig.
Nothing higher if I can help it.</p>

<p>3. Nat. Phil.—Simple mechanical problems to produce that knack of
solving problems which Prof. Forbes has taught me to despise. Common
Optics at length; and for experimental philosophy, twisting and bending
certain glass and metal rods, making jellies, unannealed glass, and
crystals, and dissecting eyes—and playing Devils.</p>

<p>4. Metaphysics—Kant’s <i>Kritik of Pure Reason</i> in German, read
with a determination to make it agree with Sir W. Hamilton.</p>

<p>5. Moral Philosophy—Metaphysical principles of moral philosophy.
Hobbes’ <i>Leviathan</i>, with his moral philosophy, to be read as the
only man who has decided opinions and avows them in a distinct way. To
examine the first part of the seventh chapter of Matthew in reference
to the moral principles which it supposes, and compare with other
passages.</p>

<p>But I question if I shall be able to overtake all these things,
although those of different kinds may well be used as alternate studies.</p>

<p>I read in Edinburgh Wilson’s Poems to see what he used to be like, and
how much he had improved since then. Did you finish Festus?<a id="FNanchor_133" href="#Footnote_133" class="fnanchor">[133]</a> I had
only two days to read it, so that I skipped part of the long speech and
a good deal of the jollification, which I think the dullest part of the
book.</p>
</div>

<div class="blockquot">

<p>The opening makes one think that it is to be an imitation of the book
of Job, but you soon see that you have to do with a dreamy mortal
without a profession, but vain withal, and a hero among women, a jolly
companion of some men, admired of students for talking of things which
he knows not, nor can know, having a so-called philosophy, an intuitive
science, and an underived religion, and with all these not perfect,
but needing more expanded views of the<span class="pagenum" id="Page_136">[Pg 136]</span> folly of strict virtue and
outward decency, of the magnificence, nay, of the duty of sinning, and
of the identity of virtue and vice, and of all opposites. He takes for
his friend one whom Wilson calls a very <i>poor devil</i>, who has
wonderful mechanical powers, but never attempts but once the supposed
object of his visit to earth, namely, temptation. He takes a more
rational view of affairs than Festus in general, but is so extremely
refined from ordinary devils, that the only passage sufficiently
characteristic for ordinary rapid readers to recognise is the sermon
to the crowd, as the speech in Hell is quite raw. He has not such an
absolute and intuitive sense of things as Festus, and does not change
so much according to his company. He seems a sincere, good-natured,
unselfish devil; while Festus is very changeable, solemn when alone,
jolly when with the jolly, drunk with the drunk, open with Lucifer,
reserved in good company, amorous with all women, talkative and serious
with all angels and saints, stern towards the unfortunate, and in all
his affections altogether selfish.</p>

<p>The book is said to have a plan, but no plot. The plan is an
exposition of the state of a man’s mind after having gone through
German metaphysics. It was one destitute of notions, and has now been
convinced that all these notions are one and the same. It is neither
meat, nor drink, nor rank, nor money, nor any common thing he wants:
“he is sure it isn’t,” and he is sore troubled for want of some great
thing to do; and when L——r starts into proximity he is the very being
he wanted to speak to; “he knew who it would be,” and recognises him
at once. An opportunity is thus given for showing two ways of thinking
about things, and therein lies the matter of the book. This may be
seen in L——r’s sermon and Festus’ prayer. To turn and get out of the
confusion of this letter, pray let me hear your opinion of the book. It
may be considered thus:—</p>

<p>1. People read the book and wonder, why?</p>

<p>It is not read for the sake of the story—that is plain; nor for the
clearness with which certain principles are developed, nor for the
consistency of the book, nor for the<span class="pagenum" id="Page_137">[Pg 137]</span> variety of the characters;
there must therefore be something overpoweringly attractive to hold
you to the book. Some say he has fine thoughts, sufficient to set up
fifty poets; to which some may answer, Where are they? Read it in a
spirit of cold criticism, and they vanish. There is not one that is
not either erroneous, absurd, German, common, or <i>Daft</i>. Where
lies the beauty? In the reader’s mind. The author has evidently been
thinking when he wrote it, and that not in words, but inwardly. The
benevolent reader is compelled to think too, and it is so great a
relief to the reader to get out of wordiness that he can put up with
insanity, absurdity, profanity, and even inanity, if by so doing he
can get into <i>rapport</i> with one who is so transcendental, and yet
so easy to follow, as the poet. When Galileo set his [lamp] a-swinging
by breathing on it, his power lay in the relation between the interval
of his breaths and the time of vibration; so in Festus the mind that
begins to perceive that his train of thoughts is that of the poem is
readily made to follow on. There are some passages where one breaks
loose, especially the rhyming description of the subpoenaing of the
planets, and the notion of the angel of the earth giving Festus a pair
of bracelets, and the way in which F. improves his mind by travel.</p>

<p>... Beauty is attributed to an object when the subject anticipates
pleasure in it. A true pleasure is a consciousness of the right action
of the faculty or function or power. Happiness is the integral of
pleasure, as wisdom is of knowledge.... Don't take all this about
Festus for truth, as I don’t believe much of it, and I’ll maybe tell
you a new story if you tell me one.</p>

<p>What of St. Peter, as compared with the Keys and with Bob?<a id="FNanchor_134" href="#Footnote_134" class="fnanchor">[134]</a></p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From Prof. Forbes.</span></p>

<p class="right"><i>Edinburgh, 4th May 1850.</i></p>

<p><span class="allsmcap">My dear Sir</span>—Professor Kelland, to whom your paper was
referred by the Council E. S., reports favourably upon<span class="pagenum" id="Page_138">[Pg 138]</span> it, but
complains of the great obscurity of several parts, owing to the
<i>abrupt transitions</i> and want of distinction between what is
<i>assumed</i> and what is <i>proved</i> in various passages, which
he has marked in pencil, and which I trust that you will use your
utmost effort to make plain and intelligible. It is perfectly evident
that it must be useless to publish a paper for the use of scientific
readers generally, the steps of which cannot, in many places, be
followed by so expert an algebraist as Prof. Kelland;—if, indeed,
they be <i>steps</i> at all and not assumptions of theorems from other
writers who are not quoted. You will please to pay particular attention
to clear up these passages, and return the MS. by post to Professor
Kelland, West Cottage, Wardie, Edinburgh, so that he may receive it by
Saturday the 11th, as I shall then have left town.—Believe me, yours
sincerely,</p>

<p class="right"><span class="allsmcap">James D. Forbes.</span></p>


<p class="nindc"><span class="allsmcap">To L. Campbell, Esq.</span></p>

<p class="right">[<i>June? 1850</i>]</p>

<p>As there has been a long truce between us since I last got a letter
from you, and as I do not intend to despatch this here till I receive
Bob’s answer with your address, I have no questions to answer, and
any news would turn old by keeping, so I intend briefly to state my
country occupations (otherwise preparation for Cambridge, if you
please). I find that after breakfast is the best time for reading Greek
and Latin, because if I read newspapers or any of those things, then
it is dissipation and ruin; and if I begin with props, experiments,
or calculations, then I would be continually returning on them.
At first I had got pretty well accustomed to regular study with a
Dictionary, and did about 120 lines of <i>Eurip</i>. a day, namely, 40
revised, 40 for to-day, and 40 for to-morrow, with the looking up of
to-morrow’s words. As I am blest with Dunbar’s <i>Lexicon</i>, it is
not very highly probable that I will find my word at all; if I do, it
is used in a different sense from Dunbar’s (so much the better), and
it has to be made out from the context (either of the author or the
Dictionary). So much for<span class="pagenum" id="Page_139">[Pg 139]</span> regular study, which I have nearly forgot,
for when I had got to the end of the first chorus I began to think of
the rods and wires that I had in a box. They have entirely stopped
<i>Eurip.</i>, for I found that if I spent the best part of the day on
him, and took reasonable exercise, I could not much advance the making
of the apparatus for tormenting these wires and rods. So the rods got
the better of the Lexicon. The observations on the rods are good for
little till they are finished; they are of three kinds, and are all
distinguished for accuracy and agreement among themselves.</p>
</div>

<figure class="figright width500" id="i_175" style="width: 200px;">
<img src="images/i_175.jpg" width="200" height="112" alt="A simple
line-drawing diagram showing a horizontal bar or rod labeled B at the
right end, suspended by multiple crossing lines from a point labeled C
at top, with a curved oval shape in the center.">
</figure>

<div class="blockquot">

<p>Thus—a rod bent by a weight at the middle takes the form of a curve,
which is calculated to be one of the fourth order. Let A C B be the rod
bent by a weight at C. Mirrors fastened to it at A and B make known
the changes of the inclination of the tangent to the rod there, and a
lens at C projects an image of a copper scale of inches and parts from
A to B, where it is observed, and so the deflection of the rod at C
becomes known. Now the calculated value of the elasticity deduced from
the deflection differs from that deduced from the observations on the
mirrors by about \(\dfrac{1}{140}\) of either, and as the deflection at
C was about \(\dfrac{1}{4}\) inch, the difference of the observed and
calculated deflections is about \(\dfrac{1}{280}\) of an inch, which is
near enough for home-made philosophical instruments to go.</p>

<p>Thus you see I would run on about rods and wires, and weights, angles,
and inches, and copper and iron, and silvered glass, and all sorts of
practicalities. Where is now <i>Eurip.</i>?—Ay, where? On the top of
the Lexicon, and behind bundles of observations and calculations. When
will he come out? for he was a good soul after all, and wise (beg his
pardon, <i>wiser</i>). For the rest I have been at Shakespeare and
Cowper. I used to put Thomson and Cowper together (why?), and Thomson
first; now they are reversed and far asunder.</p>

<p>As I suppose my occupations are not very like yours, I pray you send me
an account of what Oxford notions you have got, either from Oxonians,
books, or observation; and<span class="pagenum" id="Page_140">[Pg 140]</span> as, if I was to question you, you could but
answer my questions, I leave you to question yourself and send me some
of the answers.</p>

<p>The only regular College science that I have thought of lately is Moral
Philosophy. Whether it is an Oxford science I know not; but it must
be, if not taught, at least interesting; so I purpose to fill up this
letter with unuttered thoughts (or crude), which, as they are crammed
into words, may appear like men new waked from sleep, who leap in
confusion into one another’s breeches, hardly fit to be seen of decent
men. Then think not my words mad if their clothes fit them not, for
they have not had an opportunity of trying them oh before.</p>

<p>There are some Moral Philosophers whose opinions are remarkable for
their general truth and good sense, but not for their utility, fixity,
or novelty.</p>

<p>They tell you that in all your actions you ought to be virtuous, that
benevolence is a virtue, that lawful rulers ought to be obeyed, that a
man should give ear to his conscience.</p>

<p>Others tell you of unalterable laws of right and wrong, of Eternal
truth and the Everlasting fitnesses of things. Others of the duty of
following nature, of every virtue between two vices (Aristot.), and of
the golden mean. That a man should do what is best on the whole (1)
for himself; (2) for other men only, and <i>not</i> himself; (3) for
the whole universe, including himself, and so on. Now I think that the
answers to the following questions should be separate parts of M. Ph.:—</p>

<p>1. What is man? This is the introduction, and is called statical or
proper Metaphysics.</p>

<p>2. What are the laws of human action? Action being all that man
does—thought, word, deed.</p>

<p>3. What are the motives of human actions?</p>

<p>4. What actions do men perform in preference to what others, and why?</p>

<p>5. What is the principle by which men judge some actions right, others
wrong?</p>
</div>

<p><span class="pagenum" id="Page_141">[Pg 141]</span></p>

<div class="blockquot">

<p>6. What do particular men think of this principle? What are their
doctrines?</p>

<p>7. What is the best criticism of right and wrong, or what (to us) is
absolute right?</p>

<p>8. What are the best motives of human actions?</p>

<p>9. How are these motives to be implanted without violating the laws of
human action?</p>

<p>10. What might, or rather what <i>will</i>, mankind become after this
has been effected?</p>

<p>Moral Philosophy differs from Nat. Phil, in this, that the more new
things we hear of in Nat. Phil, the better; but in Mor. Phil, the old
things are best, so that a common objection to Mor. Phil, is that
everybody knows it all before. If a man tells you that tyranny and
anarchy are bad things, and that a just and lawful government is a
good thing, it sounds very fine, but only means that when men think
the government bad from excess or defect they give it the name of
tyranny and anarchy. The ancient virtue of Tyrannicide was a man’s
determination to kill the king whenever he displeased him. Thus it is
easy to call a dog a bad name to beat him for. But there are other
parts of Mor. Phil, in which there are differences of opinion, such
as the nature of selfishness, self-love, appetites, desires, and
affections, disinterestedness (what a word for a rush at!), which
belong to the first three questions, and so on. I have told you
something (p. 129) of three laws which I had been considering. In all
parts of Mor. Phil, these three laws seem to meet one, and in each
system of Morals they take a different form. How, that I might not
deceive myself in thinking that I was safe out of the hands of the
philosophers who argue these matters, I have been looking into the
books of Moralists the most opposed to one another, to see what it is
that makes them differ, and wherein they agree. The three principles
concerning the nature of man are continually changing their shape, so
that it is not easy to catch them in their best shape, nevertheless:</p>

<p>Lemma: Metaphysics.—A man thinks, feels, and wills, and therefore
Metaphysicians give him the three faculties of cognition, feeling, and
conation.</p>
</div>

<p><span class="pagenum" id="Page_142">[Pg 142]</span></p>

<div class="blockquot">

<p>Cognition is what is called Understanding, and is most thought of
generally.</p>

<p>Feelings are pleasures, pains, appetites, desires, aversions, approval
and disapproval, love, hate, and all affections.</p>

<p>Conations are acts of will, whatever they be.</p>

<p>Now to move a man’s will it is necessary to move his affections. (How?
Wait!) For no convictions of the understanding will do, for a man does
what he likes to do, not what he believes to be best for himself or
others. The feelings can only be moved by notions coming through the
understanding, for cognition is the only inlet of thoughts. Therefore,
although it can be proved that self-love leads to all goodness, or,
in other words, that goodness is happiness, and <i>self</i> loves
happiness, yet it can also be proved that men are not able to act
rightly from pure self-love; so that though self-love is a very fine
theoretical principle, yet no man can keep it always in view, or act
reasonably upon it. Now, most moralists take for granted that the
end which men, good or bad, pursue is their own happiness, and that
happiness, false or true, is the motive of every action, and that it
is the only right motive. Others say that benevolence is the only
virtue, and that any action not done expressly for the good of others
is entitled to no praise.</p>

<p>Most of the ancients, and Hobbes among the moderns, are of the first
opinion. Hutcheson and Brown (I think) are of the second, and call
the first selfish Philosophers and the selfish school. A few consider
benevolence to the whole universe as the proper motive of every action,
but they all (says Macintosh) confound men’s motives with the criterion
of right and wrong, the reason why a thing is right, and that which
actually causes a man to do it. In every book on Moral Philosophy some
reference is made to that precept or maxim, which is declared to be the
spirit of the law and the prophets (see Matt. <span class="allsmcap">VII</span>. 12), and
the application of it is a good mark of the uppermost thoughts or mode
of thinking of the author.</p>

<p>Hobbes lays down as the first agreement of men to secure their safety,
that a man should lay down so much<span class="pagenum" id="Page_143">[Pg 143]</span> of his natural liberty with respect
to others, as he wishes that other men should to him. Hobbes having
shown that men, in what the poets and moralists call a state of nature
(that is, of equality and liberty, and without government), must be in
a state of war, every man against every other, and therefore of danger
to every man, deduces the obligation of obeying the powers that be from
the necessity of Power to prevent universal war. Adam Smith’s theory
of Moral Sentiments (which is the most systematic next to Hobbes) is
that men desire others to sympathise with them, and therefore do those
things which may be sympathised with; that is, as Smith’s opponents
say, men ought to be guided by the desire of esteem and sympathy. Not
so. Smith does not leave us there, but I suppose you have read him, as
he is almost the only Scotch Moral Philosopher.</p>

<p>As it is Saturday night I will not write very much more. I was
thinking to-day of the duties of [the] cognitive faculty. It is
universally admitted that duties are voluntary, and that the will
governs understanding by giving or withholding Attention. They say
that Understanding ought to work by the rules of right reason. These
rules are, or ought to be, contained in Logic; but the actual science
of Logic is conversant at present only with things either certain,
impossible, or <i>entirely</i> doubtful, none of which (fortunately)
we have to reason on. Therefore the true Logic for this world is
the Calculus of Probabilities, which takes account of the magnitude
of the probability (which is, or which ought to be in a reasonable
man’s mind). This branch of Math., which is generally thought to
favour gambling, dicing, and wagering, and therefore highly immoral,
is the only “Mathematics for Practical Men,” as we ought to be.
How, as human knowledge comes by the senses in such a way that the
existence of things external is only inferred from the harmonious (not
similar) testimony of the different senses. Understanding, acting by
the laws of right reason, will assign to different truths (or facts,
or testimonies, or what shall I call them) different degrees of
probability. How, as the senses give new testimonies continually, and
as no man ever detected in them any real<span class="pagenum" id="Page_144">[Pg 144]</span> inconsistency, it follows
that the probability and credibility of their testimony is increasing
day by day, and the more a man uses them the more he believes them.
He believes them. What is believing? When the probability (there is
no better word found) in a man’s mind of a certain proposition being
true is greater than that of its being false, he believes it with
a proportion of faith corresponding to the probability, and this
probability may be increased or diminished by new facts. This is faith
in general. When a man thinks he has enough of evidence for some notion
of his he sometimes refuses to listen to any additional evidence pro
or con, saying, “It is a settled question, <i>probatis probata</i>; it
needs no evidence; it is certain.” This is knowledge as distinguished
from faith. He says, “I do not believe; I know.” “If any man thinketh
that he knoweth, he knoweth yet nothing as he ought to know.” This
knowledge is a shutting of one’s ears to all arguments, and is the
same as “Implicit faith” in one of its meanings. “Childlike faith,”
confounded with it, is not credulity, for children are not credulous,
but find out sooner than some think that many men are liars. I must
now to bed, so good night; only please to write when you get this, if
convenient, and state the probability of your coming here. We perhaps
will be in Edinburgh when the Wise men are there. How you are invited
in a corner of a letter by</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>


<p class="right"><i>Glenlair, 16th September 1850.</i></p>

<p>Professor W. Thomson has asked me<a id="FNanchor_135" href="#Footnote_135" class="fnanchor">[135]</a> to make him some
magne-crystallic preparations which I am now busy with. How, in some
of these bismuth is required, which is not to be found either in
Castle-Douglas or Dumfries. I have, therefore, thought fit to request
you, and do now request<span class="pagenum" id="Page_145">[Pg 145]</span> you, during your transit through Edinburgh on
your way here, to go either to Mr. Kemp’s establishment in Infirmary
Street, beside the College, or to some other dealer in metals, and
there purchase and obtain two ounces of metallic bismuth (called
Regulus of Bismuth), either powder or lumpish—all one. Thus you may
perceive that the end of this letter is in two ounces of Regulus of
Bismuth, that is, the metal bismuth, which if you do bring it with you,
will please me well. Not that I am turned chemist. By no means; but
common cook. My fingers are abominable with glue and chalk, gum and
flour, wax and rosin, pitch and tallow, black oxide of iron, red ditto
and vinegar. By combining these ingredients, I strive to please Prof.
Thomson, who intends to submit them to Tyndall and Knoblauch, who, by
means of them, are to discover the secrets of nature, and the origin of
the magne-crystallic forces.</p>

<p>Now, if by coming here you could turn me from a cook to a grammarian by
an irresistible influence you would do well; but if you remember the
way I used to translate at the Academy, distorting the Latin of Livy
to mean what I had preconceived, you will understand that at first I
had not only to find out what the author meant, but to become convinced
that it could not be what I thought it was.</p>

<p>John Wilson’s lectures on Moral Philosophy do not improve
on reconsideration; they become indistinct and are resolved
into the excellence of happiness, the acquiredness of
conscience, and general good-humour, philanthropy and
\(\phi\iota\lambda\alpha\gamma\alpha\theta\iota\alpha\). Here is an
outline of Abstract Mor. Phil.:—</p>

<p>1. The principles of the growth of the mind (that is, the acquisition
of opinions, propensities, and abilities).</p>

<p>2. The principles of government (the governor suits his actions to the
laws of the thing governed).</p>

<p>3. The principle of sympathy (sauce for goose is sauce for gander).</p>

<p>Out of these heads may one make something?</p>

<p>As it is bed-time, and I have to put the glue and oxide of iron into
shape to-night, I must stop here, and remain in hope of seeing you soon
(say when).</p>
</div>



<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_109" href="#FNanchor_109" class="label">[109]</a> 
This entirely disappeared afterwards, except when
ironically assumed. It was accompanied with a certain huskiness of
voice, which was observed also in later years.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_110" href="#FNanchor_110" class="label">[110]</a> 
“Prop.” here and elsewhere is an abbreviation for
“mathematical proposition.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_111" href="#FNanchor_111" class="label">[111]</a> 
Forbes’s certificate at the end of the second year goes
beyond the merely formal language of such documents:—“His proficiency
gave evidence of an original and penetrating mind.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_112" href="#FNanchor_112" class="label">[112]</a> 
Allan Stewart, Esquire of Innerhadden, Perthshire, C.E.
<i>Æq.</i>. 9th Wrangler, 1853.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_113" href="#FNanchor_113" class="label">[113]</a> 
A slight illustration of his devotion to Sir William’s
teaching, and also of his powers of endurance, is afforded by the
following incident:—One day he sprained his. ankle badly on the
College staircase; but, instead of going home, he attended Sir William
Hamilton’s class as usual, and sat through the hour as if nothing had
happened.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_114" href="#FNanchor_114" class="label">[114]</a> 
John Lockhart had made a third as the comrade of both.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_115" href="#FNanchor_115" class="label">[115]</a> 
Lucr. <i>de Rer Nat.</i>, <span class="allsmcap">I.</span> 329-345. The
following Hamiltonian notions will be found appearing from time to time
in Maxwell's correspondence and occasional writings:—</p>

<p>1. Opposition of Natural Realism to “Cosmothetic Idealism”:—</p>

<p>2. Unconscious Mental Modifications:—</p>

<p>3. Distinction between Knowledge and Belief in relation to the doctrine
of Perception:—</p>

<p>4. The Infinite or Unconditioned.</p>

<p>The following passage is worth quoting here, although the experiment in
question was probably well known to Maxwell before he went to college:—</p>

<p>“... The experiment which Sir W. Hamilton quotes from Mr. Mill, and
which had been noticed before either of them by Hartley.</p>

<p>“It is known that the seven prismatic colours, combined in certain
proportions, produce the white light of the solar ray. Now, if the
seven colours are painted on spaces bearing the same proportion to one
another as in the solar spectrum, and the coloured surface so produced
is passed rapidly before the eyes, as by the turning of a wheel, the
whole is seen as white.”—Mill <i>On Hamilton</i> (1st edition, 1865),
p. 286.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_116" href="#FNanchor_116" class="label">[116]</a> 
Mr. George Boole’s first logical treatise, “The
Mathematical Analysis of Logic, being an Essay towards a Calculus of
Deductive Reasoning,” was published in 1847 at Cambridge, by Macmillan,
Barclay, and Macmillan.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_117" href="#FNanchor_117" class="label">[117]</a> 
Above, <a href="#Page_55">p. 55.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_118" href="#FNanchor_118" class="label">[118]</a> 
<i>i.e.</i> Jar.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_119" href="#FNanchor_119" class="label">[119]</a> 
<i>i.e.</i> Work.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_120" href="#FNanchor_120" class="label">[120]</a> 
In the “old house” (above, <a href="#Page_26">p. 26</a>, 1. 4); now fitted up
as a gun-room.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_121" href="#FNanchor_121" class="label">[121]</a> 
<i>i.e.</i> Jar.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_122" href="#FNanchor_122" class="label">[122]</a> 
This is still remembered by “Lizzy,” Mrs. MacGowan.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_123" href="#FNanchor_123" class="label">[123]</a> 
See above, <a href="#Page_93">p. 93.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_124" href="#FNanchor_124" class="label">[124]</a> 
See above, <a href="#Page_28">p. 28</a>, 1. 6.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_125" href="#FNanchor_125" class="label">[125]</a> 
See below, <a href="#Page_138">p. 138</a>, 1. 2. Forbes was extra-precise in
articulation. Hence the spelling.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_126" href="#FNanchor_126" class="label">[126]</a> 
See above, <a href="#Page_82">p. 82.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_127" href="#FNanchor_127" class="label">[127]</a> 
At Oxford.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_128" href="#FNanchor_128" class="label">[128]</a> 
Maxwell often insisted on this in conversation,
with especial reference to our command of the muscles depending on
experience of the muscular sense.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_129" href="#FNanchor_129" class="label">[129]</a> 
On this subject the following entry from Mrs.
Morrieson’s Diary is of some interest:—“<i>5th Deer. 1846</i>.—L. and
R. dined with Miss Cay. James Maxwell has been under her care during
his father’s absence and has been suffering very much from toothache
and earache, in consequence of cutting his eye-teeth—an extraordinary
thing at 15.” To which may be added the following from his father’s
Diary:—“<i>1846, Sa., Dec. 12.</i>—Jas. still affected by the
tooth.... Took a short walk, and came back by Mr. Nasmith (dentist),
and went in, and on consultation, got the tooth drawn at once—it was
nicely and quickly done, and Jas. never winced.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_130" href="#FNanchor_130" class="label">[130]</a> 
Amongst these may be specially mentioned Mr. Hugh
Blackburn and Dean Ramsay. Professor Forbes and Charles Mackenzie were
also interested in the question. Professor Blackburn, in particular,
insisted that the mathematical discipline of Cambridge would enable him
to exercise his genius more effectively.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_131" href="#FNanchor_131" class="label">[131]</a> 
“From the University Library lists for this period
it appears that Maxwell perused at home Fourier’s <i>Theorie de
la Chaleur</i>, Monge’s <i>Géometrie Descriptive</i>, Newton’s
<i>Optics</i>, Willis’s <i>Principles of Mechanism</i>, Cauchy’s
<i>Calcul Differentiel</i>, Taylor’s <i>Scientific Memoirs</i>, and
many other works of a high order. Unfortunately no record is kept of
books consulted in the reading-room.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_132" href="#FNanchor_132" class="label">[132]</a> 
On the other hand it should be mentioned (though the
statements are not contradictory) that Hopkins used to say he had never
known Maxwell “make a mistake,” <i>i.e.</i> he never misapprehended the
conditions of any problem. Of this fact, which was communicated to me
by my brother, I have since received the following confirmation from
Mr. W. N. Lawson, of the Equity Bar:—Mr. Lawson quotes from a diary
kept by himself at the time-“<i>July</i> 15, 1853.—He (Hopkins) was
talking to me this evening about Maxwell. He says he is unquestionably
the most extraordinary man he has met with in the whole range of
his experience; he says it appears impossible for Maxwell to think
incorrectly on physical subjects; that in his analysis, however, he
is far more deficient; he looks upon him as a great genius, with all
its eccentricities, and prophesies that one day he will shine as a
light in physical science, a prophecy in which all his fellow-students
strenuously unite.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_133" href="#FNanchor_133" class="label">[133]</a> 
Festus, a poem by Philip James Bailey, 1849.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_134" href="#FNanchor_134" class="label">[134]</a> 
<i>i. e.</i> Is Robert Campbell going to Peterhouse or
Caius?</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_135" href="#FNanchor_135" class="label">[135]</a> 
This request had probably some connection with the
meeting of the “wise men” in Edinburgh. Maxwell had been present, and
had spoken in Section A. Professor Swan remembers the surprise felt by
all but Forbes at seeing the beardless stripling rise to dispute some
point in the colour theory with Sir David Brewster.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_146">[Pg 146]</span></p>

<h2 class="nobreak" id="CHAPTER_VI">CHAPTER VI.<br>
<span class="allsmcap">UNDERGRADUATE LIFE AT CAMBRIDGE—OCTOBER 1850 TO JANUARY
1854—<i>Æt.</i> 19-22.</span></h2>
</div>

<p class="nind">
BEFORE placing his son at Cambridge Mr. Clerk Maxwell had,
as was usual with him, consulted various persons, including Professor
James Forbes and Professor Kelland of Edinburgh, Professors Thomson
and Blackburn of Glasgow, and Charles Mackenzie, afterwards Bishop
of Natal, then a Lecturer of Caius College, Cambridge.<a id="FNanchor_136" href="#Footnote_136" class="fnanchor">[136]</a> Forbes
strongly advised Trinity, and offered an introduction to Whewell; but
after various reasons urged for Trinity, Caius, and Peterhouse, the
decision was in favour of Peterhouse.</p>

<p>Maxwell’s first impression of college life, like that of some other
clever freshmen, was not one of unalloyed satisfaction. He was
transplanted from the rural solitudes of Galloway into the midst of a
society which was of curious interest to him, but did not make him feel
immediately at home. He found himself amongst the freshmen spelling out
Euclid again, and again “monotonously parsing” a Greek play. He had
brought with him his scraps of gelatine, gutta-percha,<span class="pagenum" id="Page_147">[Pg 147]</span> and unannealed
glass, his bits of magnetised steel, and other objects, which were apt
to appear to the uninitiated as “matter in the wrong place.” And this
in the home of science! Nor were his experiments facilitated by the
casual “dropping-in” of the average undergraduate.</p>

<p>His boyish spirits and his social temper, together with the novelty
of the scene, and a deep-rooted presentiment of the possibilities of
Cambridge, no doubt made even his first term a happy one. But there was
an undercurrent of restlessness and misgiving. And this made him lend
a readier ear to the advice which was pressed upon him from various
quarters, that he should migrate to Trinity.</p>

<p>The ground of this advice was simply that from the large proportion of
high wranglers at Peterhouse, and the smallness of the foundation, the
chances of a fellowship there for a mathematical man were less than
at Trinity College. And this was the reason which, together with his
son’s evident wish, most weighed with Mr. Clerk Maxwell. He was also
struck with the fact that “Porter senior,” who about this time became
Maxwell’s private tutor, recommended the change, although he himself
belonged to Peterhouse. But the friend whose counsel in this whole
matter was most prized both by father and son was Charles Mackenzie, of
whom one who was his colleague at Caius has said that he was “the best
of all men whom he had known.”</p>

<p>On Maxwell’s own mind, it need hardly be said, the prospect of a
fellowship had little or no influence,<span class="pagenum" id="Page_148">[Pg 148]</span> except in so far as lie desired
to please his father. His own prime motive was undoubtedly the hope, in
which he was not disappointed, that the larger College would afford him
ampler opportunities for self-improvement.</p>

<div class="blockquot">

<p class="nindc space-above2">
<span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>St. Peter's College, 18th Oct. 1850.</i></p>

<div class="sidenote"><i>Æt.</i> 19.</div>

<p>You tell me to lay my account with being dull at first, and to condole
with Robert, whereas there is continual merriment (stop it!), and
Robert is not settled yet. As for secrets of nature, they are not for
Freshmen even to think of. Now for personal journal, with observations
on the manners and customs, etc....</p>
</div>

<figure class="figleft width500" id="i_184" style="width: 100px;">
<img src="images/i_184.jpg" width="100" height="134" alt="A simple
bold line drawing of a plain cross symbol, likely used as a decorative
marker or section divider.A simple bold line drawing of a plain cross
symbol, likely used as a decorative marker or section divider.">
</figure>

<div class="blockquot">

<p>We spent the night at Peterborough, and saw the Cathedral in the
morning. Very grand outside. West end a fine subject for calotype seen
right perpendicular, and the point P for a picture made by hand, fine
weeping willows, etc.</p>

<p>Proceeded to Ely with some Gloucester people we met in the Cathedral,
and inspected Ely Cathedral like regular Archbishops. Went up the
steeple to see land like sea. Heard all the people talking of the
enclosure of the Wash to be called Victoria county, and to be worth
30s. per acre. Got to Cambridge, and called on Mr. Fuller,<a id="FNanchor_137" href="#Footnote_137" class="fnanchor">[137]</a> after
getting room for my father (as the Bull was full) in a lodgement, Got
rooms in College, sitting and bed, six paces from Chapel, and good
light. Had Tait to tea. Next day breakfast with Tait and Steele (of
Glasgow and Ireland, and a future wrangler), and so on in detail.</p>
</div>

<div class="blockquot">

<p>M'Kenzie came up to-day. He took us to most of the colleges. Saw Newton
and Bacon in Trin. Chapel. At Hall there was a proclamation to this
effect nearly:— Whereas (on the — day of —, 1850), application was
made to the Syndicate (or Senate or something), by William Cooke, for
leave to erect his equestrian establishment; and<span class="pagenum" id="Page_149">[Pg 149]</span> whereas, considering
the immoral nature of said establishment, it was unanimously resolved
to refuse leave. And whereas, notwithstanding said refusal, said W.
C. did publicly notify his intention of putting up said estab.: Be it
known, etc., that it is resolved and enacted, that if any undergraduate
or graduate in <i>statu pupillari</i>, or tutor, or fellow, or master,
etc., he caught at said establishment, he will be punished with
expulsion, rustication, Castigation, or such other punishment as the
case may require.<a id="FNanchor_138" href="#Footnote_138" class="fnanchor">[138]</a></p>

<p>So there is to be a quarrel between the Town and University about this,
and also about whether they are to pay poor rate, as the University is
supposed to be extra-parochial.</p>

<p>Prelim, exam, to-morrow at 9. Peter can’t afford to pluck at it. C. H.
Robertson has past his at Trin. He is in Ling’s lodgings. He wants to
keep quiet and to read by himself, and have only old acquaintances.</p>


<p class="nindc"><span class="allsmcap">To a Friend suffering from Depression.</span></p>

<p>Hope to write you more again; but to conclude and get to bed: You
are always talking of your withering up, awful change, etc. How I
have not a sermon on this subject by me, neither will I deliver an
<i>extempore</i> one; but though I do not pretend to have examined
you in all the branches, yet I would take the liberty to say that
with respect to intellect, as the Laird of Dumbiedykes said, “It’ll
be growing when ye’re sleeping,”—that is to say, what you take for
corruption and decay is only stratification.<a id="FNanchor_139" href="#Footnote_139" class="fnanchor">[139]</a></p>
</div>

<p>The letters written to his father by Maxwell while an undergraduate at
Cambridge have unfortunately disappeared. But something of their tenor
may be<span class="pagenum" id="Page_150">[Pg 150]</span> gathered from Mr. Maxwell's letters to his son. The following
extracts are related to his first term at college:—</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 22d October 1850.</i></p>

<p>Did Prof. Thomson catch you, and view your “dirt;”<a id="FNanchor_140" href="#Footnote_140" class="fnanchor">[140]</a> and if so, what
thought he thereof?</p>

<p class="right"><i>Glenlair, 30th October 1850.</i></p>

<p>Who is the lecturer in the Greek play? Did I see him while at
Cambridge? I am sorry to hear the Greek class is a bad one, for you
would have got more good of it if [it] had required you to work to
maintain a good position in it; but you should study your part well,
for it is not comparative excellence, but absolute, that will be of use
in University competitions.</p>

<p class="right"><i>Glenlair, 8th Novr. 1850.</i></p>

<p>You say your lecturer in Greek is good, so I hope you profit
accordingly, altho’ your classfellows are not great scholars....</p>

<p>... It would be necessary to take care there are no mouse-holes. A very
hungry Chapel mouse might come through. There had been an entrance that
way to the Chapel. It would be to the organ loft.</p>

<p>Have you called on Profs. Sedgwick at Trin., and Stokes at Pembroke? If
not, you should do both. Stokes will be most in your way if he takes
you in hand at all Sedgwick is also a great Don in his line, and if you
were entered in Geology would be a most valuable acquaintance; and,
besides, not going to him would be uncivil, both to him and to the
Alisons, after their having arranged the introduction. Provide yourself
with cards.</p>

<p>It might be worth your while to stop at York to view it.</p>
</div>

<p><span class="pagenum" id="Page_151">[Pg 151]</span></p>

<div class="blockquot">

<p class="right"><i>Glenlair, 13th Novr. 1850.</i></p>

<p>I am glad you have communication with Stokes and Mackenzie.</p>

<p>Is all Cambridge up in arms against the Pope and Cardinal Wiseman? I
cannot enter into all the fuss about it. If there is any law to hinder
people calling themselves Cardinals or Archbishops, let it be acted on;
but if there is no such law, let the assumption of empty titles ... be
laughed at.</p>
</div>

<hr class="tb">

<p>Men of genius are often represented by themselves and others as owing
little or nothing to their education. This certainly was not true of
Maxwell, whose receptivity was only less than his originality. He laid
a strong retentive grasp on all that was given to him, and set his own
stamp on it in return. Both what was good and what was defective in
his early training had left a lasting impress on him, and it was by no
means an indifferent circumstance that, in the maturity of his powers,
he entered Trinity College, Cambridge, at an advanced period of the
long mastership of Whewell.</p>

<p>I well remember my surprise, not unmixed with needless pangs of boyish
jealousy, on finding in the following summer that Maxwell had all at
once made a troop of friends. Their names were always on his lips,
and he loved by some vivid trait to indicate the character of each.
His acquaintance was multifarious, and he had many pithy anecdotes to
relate of other than his own particular associates.</p>

<p>He was at first in lodgings in King's Parade, where he “chummed” with
an old Edinburgh schoolfellow,<span class="pagenum" id="Page_152">[Pg 152]</span> Charles Hope Robertson.<a id="FNanchor_141" href="#Footnote_141" class="fnanchor">[141]</a> It appears
that the college lectures in mathematics were still felt to be rather
elementary, but that he worked harder problems (some were of his own
invention) with Tait and with Porter of Peterhouse, who was still his
private tutor. A certain amount of classical reading was required
of freshmen, and he still took his classics seriously. There is an
allusion to the Ajax in one of his letters, and he makes critical
remarks upon Demosthenes. There was also a lecture on Tacitus by a
“deep, half-sentence lecturer.” Either now or in the following year—at
some time before the little-go examination of March 1852—he translated
the choral odes of the Ajax into rhymed English verse,<a id="FNanchor_142" href="#Footnote_142" class="fnanchor">[142]</a> and made a
rough caricature of Ajax slaughtering the oxen.</p>

<p>His chief outdoor amusements were walking, bathing, and sculling. He
was upset in his “funny” in May 1851—a trifling accident to so expert
a swimmer. “But,” writes a contemporary Cantab, “he richly deserved
it. For he tried to take off his jersey after shipping’ his oars. The
oscillations of the funny became rapidly more extensive, in spite of
his violent efforts at equilibrium.” For winter recreation he ordered a
pair of basket-sticks to be made at home.</p>

<p>He tried some odd experiments in the arrangement of his hours of work
and sleep. But his father disapproved of such vagaries, and they were
not continued long—although not entirely abandoned even when he had
rooms in college. The authority just quoted says,<span class="pagenum" id="Page_153">[Pg 153]</span> “From 2 to 2.30
<span class="allsmcap">A.M.</span> he took exercise by running along the upper corridor,
<i>down</i> the stairs, along the lower corridor, then up the stairs,
and so on, until the inhabitants of the rooms along his track got up
and lay <i>perdus</i> behind their sporting-doors to have shots at him
with boots, hair-brushes, etc., as he passed.”</p>

<p>Intellectual interests of all kinds surrounded him, and he soon began
to lend new life to all. There were also in the Cambridge of this
period religious influences of a remarkable kind. Apart from the
Simeonite tradition which still lingered, there was a class of younger
men, who, while faithful to a pious evangelical upbringing, had open
and inquiring minds. The names of Henry and Frank Mackenzie of Trinity,
the one senior to Maxwell, the other junior to him,<a id="FNanchor_143" href="#Footnote_143" class="fnanchor">[143]</a> may be
mentioned in particular. To such men, and to many others, the preaching
of Harvey Goodwin, now Bishop of Carlisle, but at that time chiefly
known as a mathematical authority, was full of interest.</p>

<div class="sidenote2">1851.</div>

<p>Two events of some importance to the scientific world were the
introduction of Foucault’s pendulum experiment for proving the rotation
of the earth, and the Great Exhibition of 1851.</p>

<p>Maxwell saw the pendulum experiment in Mr. Thacker’s (the tutor’s)
rooms at Trinity in April or<span class="pagenum" id="Page_154">[Pg 154]</span> May, and wrote an account of it to his
father, which has been lost.</p>

<p>The “viewing” of the Crystal Palace, although a thing to be done, was
made less exciting than it would otherwise have been by the constant
habit of visiting all manufactures according to opportunity. Maxwell
disclaims all “fanaticism” on the subject, and his father writes that
while a fortnight would be required to see it properly, a great deal of
it must be already familiar to them both.</p>

<div class="sidenote"><i>Æt.</i> 20.</div>

<p>In the October term he joined the “team” of Hopkins, the great private
tutor, as a fifteenth pupil.</p>

<p>He also became a regular attendant of Professor Stokes's lectures,
and commenced his lifelong friendship with one whose original
investigations were so closely akin to some of his own.</p>

<p>Professor Stokes's kindness was greatly valued even in those old days,
and much more afterwards. The young man's happiness in all ways at
Trinity is manifested by the reappearance of the poetic vein, about the
time of the junior sophs' examination, in the <i>Lay of King Numa</i>,
dated 13th December 1851.</p>


<p class="space-above2">
To this sketch of his first year at college there must be appended
one more reminiscence of Glenlair. We met there in the autumn of that
year, and I remember that either then or in the previous year, he put
into my hands Carlyle's translation of Goethe's <i>Wilhelm Meister</i>,
remarking that it was a book to be read with discretion.</p>

<p>In the autumn of 1850 the neighbouring estate of<span class="pagenum" id="Page_155">[Pg 155]</span> Upper Corsock had
been let to a shooting-party,<a id="FNanchor_144" href="#Footnote_144" class="fnanchor">[144]</a> one of whom remarked to me what a
pity it was that young Mr. Clerk Maxwell was “so little suited for a
country life.” I clearly recollect his look of exulting mirth when this
was repeated to him. His disinclination to field sports was certainly
not due to any lack of activity, nor even to his shortsightedness,
which for other purposes was easily overcome, but simply to his love
for animals. The moral of Wordsworth's <i>Hart-Leap Well</i> was not
so much a principle as an instinct with him.<a id="FNanchor_145" href="#Footnote_145" class="fnanchor">[145]</a> I remember his once
speaking to me on the subject of vivisection. He did not condemn its
use, supposing the method could be shown to be fruitful, which at that
time he doubted, but—“Couldn't do it, you know,” he added, with a
sensitive wistful look not easy to forget. This is all I ever heard him
say on the subject.</p>


<p class="nindc"><span class="allsmcap">Letters, 1851.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>11th March 1851.</i></p>

<p class="right"><i>Lings, King’s Parade, Cambridge.</i></p>

<div class="sidenote2">1851.
<i>Æt.</i> 19.</div>

<p>... Have you read Soph. <i>Ajax</i>, or would you like to do it
then?<a id="FNanchor_146" href="#Footnote_146" class="fnanchor">[146]</a></p>

<p>I have been trying an experiment of sleeping after hall. Last Friday I
went to bed from 5 to 9.30, and read very hard from 10 to 2, and slept
again from 2.30 to 7.</p>

<p>I intend some time to try for a week together sleeping from 5 to 1,
and reading the rest of the morning. This is practical scepticism with
respect to early rising.</p>
</div>

<p><span class="pagenum" id="Page_156">[Pg 156]</span></p>

<div class="blockquot">

<p>An Oxford man is reported to have complained of the lateness of morning
chapel; he could not sit up for it. I will have the most of my reading
over by that time....</p>

<p>Demosthenes goes on. I begin to see what may be written in prose, and
how ill it may be translated.</p>

<p>It is a \(\gamma\rho\alpha\phi\eta\)
\(\pi\alpha\rho\alpha\nu\omicron\mu\omega\nu\), so there is less
declamation and more demonstration; but the arguments, small at first,
are added as they proceed, and never left behind, so by oft repetition
they seem stronger than they are.</p>

<p>Last night I searched for difficult problems to puzzle Steele and
Porter junior with. Here are some much more mild, which we freshmen
get....</p>

<p>It is twelve o’clock, and I have to do Demosthenes to-morrow before
breakfast. This implies Chapel, therefore bed, therefore I shut up.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 6th March 1851.</i></p>

<p>Simpson rages at present in the Electro-biology. Dr. Alison is very
wroth about it. He says he has known two cases of nervous people whose
minds were quite disordered by it. I hope it is not in fashion at
Cambridge, and at any rate that you do not meddle with it. If it does
anything, it is more likely to be harm than good; and if harm ensue,
the evil might be irreparable, so let me hear that you have dismissed
it; you have plenty better things in hand where you are.<a id="FNanchor_147" href="#Footnote_147" class="fnanchor">[147]</a></p>


<p class="right"><i>Glenlair, 29th April 1851.</i></p>

<p>Explain the pendulum experiment to me. You used often to speak of the
retardation of the Rotation of the Earth by the friction of the tides.</p>

<p>What is the Phosphate of Lime theory of mental progress?</p>
</div>

<p><span class="pagenum" id="Page_157">[Pg 157]</span></p>

<div class="blockquot">

<p class="right"><i>Glenlair, 18th May 1851.</i></p>

<p>Do you like the Trig, lectures A?<a id="FNanchor_148" href="#Footnote_148" class="fnanchor">[148]</a> Tacitus is not new to you. His
style must be congenial to a deep, half-sentence lecturer.</p>

<p>Were you carrying your watch when you were upset in your funny? and if
so, how did it agree with the douking?<a id="FNanchor_149" href="#Footnote_149" class="fnanchor">[149]</a></p>

<p>I shall be glad to hear about the Pendulum. Who is Thacker, who asked
you to his rooms to see it?</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Cambridge, 9th June 1851.</i></p>

<p>I find I owe you one letter this term. I intended to write three days
ago, but I am now refreshed by classical papers, and disburdened of
half the subjects of examination.</p>

<p>On Friday we had Euclid, on Saturday Greek,—cram on both subjects;
to-day Ajax and Tacitus translations. I did no composition, but did
various readings, strongly preferring certain of them for obvious
reasons.</p>

<p>I find that 4 hours Euclid is worse than 2 3-hour papers of cram,
though I sent up much more cram than Euclid. This of itself shows that
disburdening cram is not like grinding out Mathematics. M—— in the
Plato cram, writing a comparison of Cynics and Platonists, said that
Platonism was a real live thing, but Cynicism was sleepy, and that
even in its greatest ornament, Diogenes, the view of the universe was
contracted to a front look-out from a wash-tub, and the <i>summum
honum</i> reduced to sunning one’s self with eyes shut and buttons
open. This was to let off his jaw on first setting down, but he let it
in among his papers, and could not get it out again.</p>

<p>Excuse my square sentences. I have spent my curves on Tacitus, and I
must now proceed to Trig. Write.—Yrs.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>8 King’s Parade, 9th Nov. 1851.</i></p>

<div class="sidenote2"><i>Æt.</i> 20.</div>

<p>I began a letter last week, but stopped short for<span class="pagenum" id="Page_158">[Pg 158]</span> want of matter.
I will not send you the abortion. Facts are very scarce here. There
are little stories of great men for minute philosophers. Sound
intelligence from Newmarket for those that put their trust in horses,
and Calendristic lore for the votaries of the Senate-house. Man
requires more. He finds \(x\) and \(y\) innutritious, Greek and Latin
indigestible, and undergrads, nauseous. He starves while being crammed.
He wants man's meat, not college pudding. Is truth nowhere but in
Mathematics? Is Beauty developed only in men’s elegant words, or Right
in Whewell's <i>Morality</i>? Must Nature as well as Revelation be
examined through canonical spectacles by the dark-lantern of Tradition,
and measured out by the learned to the unlearned, all second-hand.
I might go on thus. Now do not rashly say that I am disgusted with
Cambridge and meditating a retreat. On the contrary, I am so engrossed
with shoppy things that I have no time to write to you. I am also
persuaded that the study of \(x\) and \(y\) is to men an essential
preparation for the intelligent study of the material universe.
That the idea of Beauty is propagated by communication, and that in
order thereto human language must be studied, and that Whewell’s
<i>Morality</i> is worth reading, if only to see that there <i>may
be</i> such a thing as a system of Ethics.</p>

<p>That few will grind up these subjects without the help of rules, the
awe of authority, and a continued abstinence from unripe realities, etc.</p>

<p>I believe, with the Westminster Divines and their predecessors <i>ad
Infinitum that</i> “Man’s chief end is to glorify God and to enjoy him
for ever.”</p>

<p>That for this end to every man has been given a progressively
increasing power of communication with other creatures. That with his
powers his susceptibilities increase.</p>

<p>That happiness is indissolubly connected with the full exercise of
these powers in their intended direction. That Happiness and Misery
must inevitably increase with increasing Power and Knowledge. That
the translation from the one course to the other is essentially
<i>miraculous</i>, while<span class="pagenum" id="Page_159">[Pg 159]</span> the progress is natural. But the subject is
too high. I will not, however, stop short, but proceed to Intellectual
Pursuits.</p>

<p>It is natural to suppose that the soul, if not clothed with a body, and
so put in relation with the creatures, would run on in an unprogressive
circle of barren meditation. In order to advance, the soul must
converse with things external to itself.</p>

<p>In every branch of knowledge the progress is proportional to the amount
of facts on which to build, and therefore to the facility of obtaining
data. In the Mathematics this is easy. Do you want a quantity? Take
\(x\); there it is!—got without trouble, and as good a quantity as one
would wish to have. And so in other sciences,—the more abstract the
subject, the better it is known. Space, time, and force come first in
certainty. These are the subjects in Mechanics.</p>

<p>Then the active powers, Light, Heat, Electricity, etc. = Physics.</p>

<p>Then the differences and relations of Matter = Chemistry, and so on.</p>

<p>Here the order of advancement is just that of abstractedness and
inapplicability to the actual. What poor blind things we Maths,
think ourselves! But see the Chemists! Chemistry is a pack of cards,
which the labour of hundreds is slowly arranging; and one or two
tricks,—faint imitations of Nature,—have been played. Yet Chemistry
is far before all the Natural History sciences; all these before
Medicine; Medicine before Metaphysics, Law, and Ethics; and these I
think before Pneumatology and Theology.</p>

<p>Now each of these makes up in interest what it wants in advancement.</p>

<p>There is no doubt that of all earthly creatures Man is the most
important to us, yet we know less of him than any other. His history
is more interesting than natural history; but nat. history, though
obscure, is much more intelligible than man’s history, which is a tale
half told, and which, even when this world’s course is run, and when,
as some think, man may compare notes with other rational<span class="pagenum" id="Page_160">[Pg 160]</span> beings, will
still be a great mystery, of which the beginning and the end are all
that can be known to us while the intermediate parts are perpetually
filled up.</p>

<p>So now pray excuse me if I think that the more grovelling and
materialistic sciences of matter are not to be despised in comparison
with the lofty studies of Minds and Spirits. Our own and our
neighbours’ minds are known but very imperfectly, and no new facts will
be found till we come in contact with some minds other than human to
elicit them by counterposition. But of this more anon.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 3d Novr. 1851.</i></p>

<p>How do you like and how do you profit by Hopkins’ mode of driving? He
should get one more pupil, and drive 16 in hand like Batty or Cook.</p>


<p class="right"><i>Glenlair, 18th Novr. 1851.</i></p>

<p>You seem to have great gaieties with College Parties with Scientific
Dons. Do you take notes of Stokes’ experiments on the bands of the
Spectrum? Will they be suitable for repetition in the garret of the old
House?<a id="FNanchor_150" href="#Footnote_150" class="fnanchor">[150]</a></p>

<p>The clearing away a bank of weeds was a sly trick of the Trinity 4-oar,
and I think Peterhouse and Sidney justified in protesting.<a id="FNanchor_151" href="#Footnote_151" class="fnanchor">[151]</a> What
tribunal is there to settle such matters?</p>

<p>I copied from your letters plan and section and elevation of the
Baskets for single stick, and committed the same to the Davie.<a id="FNanchor_152" href="#Footnote_152" class="fnanchor">[152]</a></p>
</div>

<hr class="tb">

<p>In the spring of 1852 he got rooms in college<span class="pagenum" id="Page_161">[Pg 161]</span> (Letter G, Old Court,
south Attics), succeeding to his friend Blakiston, and passed his
Little-go. In April of the same year he gained his scholarship, and
was now launched without further necessary distraction on the long
pull of preparation for the Tripos under Hopkins. But his energies
were by no means absorbed in this continuous “grind.” He contributed
various papers to the <i>Cambridge and Dublin Mathematical Journal</i>,
did not confine himself to mathematics in the May examination, and
in November, besides writing the comic <i>Vision of a University,
of Pedantry, and of Philosophy</i>, made elaborate preparation for
a College declamation, “the Scottish Covenanters” being the subject
characteristically chosen by him.</p>

<p>In June he had paid a short visit to Oxford, and made a trip to
Lowestoft with P. G. Tait, before settling at Cambridge (to read and
bathe) for the vacation term.</p>

<div class="sidenote2"><i>Æt.</i> 21.</div>

<p>Living in college and dining at the scholars' table, he naturally
became more intimate with the other scholars, and he appears especially
to have sought contact with classical men. To the names of Cracroft,
Whitt, and Blakiston, amongst his newer friends are now added in
his correspondence those of “Droop the ingenuous,” Gedge, Howard
Elphinstone, Isaac Taylor, Maclennan,<a id="FNanchor_153" href="#Footnote_153" class="fnanchor">[153]</a> and Vaughan Hawkins.</p>

<p>The idea of self-improvement in society had taken a firm hold of him,
and he was conscious of the difficulty of guiding himself amongst so
many cross<span class="pagenum" id="Page_162">[Pg 162]</span> influences. He knew that he was involuntarily different
with different men, and there are curious traces in his correspondence
of the struggle to make the highest use of social circumstances. Those
who saw him about this time after an interval were struck by a marked
change in his countenance, which, as compared with the Edinburgh days,
had very distinctly gained in manliness and gravity, and showed a
certain massiveness in its proportions which they had not previously
noticed. His dark brown eye seemed to have deepened, some parts of
the iris being almost black. A slight contraction of the chest, and
a stature which, although above the average, was not tall enough to
carry off the weight of his brow, made him less handsome standing
than sitting. But his presence had by this time fully acquired the
unspeakable charm for all who knew him, which made him insensibly
become the centre of any circle, whether large or small, consisting
of his friends or kindred. His hair and incipient beard were raven
black, with a crisp strength in each particular hair, that gave him
more the look of a Nazarite than of a nineteenth century youth. His
dress was plain and neat, only remarkable for the absence of everything
adventitious (starch, loose collars, studs, etc.), and an “æsthetic”
taste might have perceived in its sober hues the effect of his
marvellous eye for harmony of colour.<a id="FNanchor_154" href="#Footnote_154" class="fnanchor">[154]</a></p>

<p><span class="pagenum" id="Page_163">[Pg 163]</span></p>

<p>The impression he made on older persons with whom he was less intimate
may be gathered from the remarks of Dean Ramsay in a note to Miss Cay:—</p>

<div class="blockquot">

<p>I had great pleasure in seeing your nephew, young Clerk Maxwell. He is
shrewd and cautious. He seems to like Cambridge, and I doubt not will
distinguish himself. He is sparing in his words, but what he says is to
the point.</p>
</div>

<p>The following contribution from the Rev. Charles Hope Robertson, the
Rector of Smeeth (above, p. 152), throws light on more than one aspect
of his life at this period:—</p>

<div class="blockquot">

<p>I was at Trinity College, Cambridge, in the same years as Clerk
Maxwell, and for some time had lodgings in the same house. This, as
well as knowing him before in Edinburgh, led to our frequently meeting.</p>

<p>He was of a very kindly disposition (under a blunt exterior), of which
I can give an example. I had hurt my eyes a good deal with experiments
on light, while working up for a course of Professor Forbes’s lectures
at Edinburgh College, and for a good part of my undergraduate course
was able to use them very little. He used to find me sitting in my
rooms with closed eyes, unable to prepare for next day’s lectures, and
often gave up an hour of his recreation time, to read out to me some of
the book-work I wanted to get over. This infirmity prevented my reading
for more than a moderate degree in mathematical honours; but I should
have been still worse off if he had not thus been “eyes to the blind”
for me.</p>

<p>He had an innate reverence for sacred things, which I do not think was
ever much disturbed by the scepticism</p>
</div>

<p><span class="pagenum" id="Page_164">[Pg 164]</span></p>

<div class="blockquot">

<p>fashionable among shallow scientific men. As my main object in coming
to Cambridge was to prepare for holy orders, I had more interest in
theological subjects than any others. He knew this, and would refer
to me points of difficulty for our mutual consideration till we next
met. The result was useful to us both. On one occasion an attack on
the Mosaic history having perplexed him, he was glad of an idea that
occurred to me, that the account of God’s driving out the heathen by
“sending the hornet” before the Israelites, was not an idea likely to
occur in a book of human origin, where a leader would rather be apt to
magnify than to diminish his own and his people’s prowess. This exactly
suited the sceptical state of some friend he had been conversing
with. On another occasion he hit on a very beautiful mathematical
illustration of St. Paul’s closing view of his career, in 2 Tim. iv.
6-8; “St. Paul was looking backward, forward, and downwards—so the
<i>resultant was upwards</i>.”</p>

<p>As an original experimenter he was most ingenious in contriving out of
simple means apparatus for delicate experiments. I have to this day
some crystals for showing polarised light, which he gave me, cut and
polished by most simple rubbing, mounted with cardboard and sealing-wax.</p>

<p>His <i>Essay on the Rings of Saturn</i>,—showing how mechanical
principles required that these bodies were not solid, but formed
by multitudes of small bodies revolving round Saturn, in bands of
orbits,—has received abundant confirmation from recent observation
with large telescopes. His own simple experiments with corks and rings
suggested the idea.</p>

<p>But while so ingenious himself, he had great difficulty in imparting
his ideas to others; consequently was not so clear a lecturer or writer
as might have been expected. It was probably this that prevented his
being senior wrangler of his year.</p>

<p>I may mention that though not joining in the ordinary games of young
fellows, such as cricket and rowing, he was very active; and I have
seen him in bathing take a<span class="pagenum" id="Page_165">[Pg 165]</span> running header from the bank, turning a
complete somersault before touching the water.<a id="FNanchor_155" href="#Footnote_155" class="fnanchor">[155]</a></p>

<p>If shortly described, he might be said to combine a grand intellect
with childlike simplicity of trust. He was too deep a thinker to be
sceptical, but too well read not to feel for others’ difficulties. All
his experiments led him to greater reverence for the Great First Cause,
heartily agreeing with Young’s <i>Night Thoughts</i>, “An undevout
astronomer is mad.”</p>
</div>

<p>In the course of the winter he was elected a member of the Select Essay
Club, the <i>crême de la crême</i> of Cambridge intellects, familiarly
known (because limited to the number twelve) as “the Apostles.” His
contributions to this famous association still remain,<a id="FNanchor_156" href="#Footnote_156" class="fnanchor">[156]</a> and present
a curious reflection of the contemplative activities of his mind,
which is far indeed from being engrossed with mere mathematics, but
is rather, in the language of Plato, “taking a survey of the universe
of things,” παλσαν πάντων φύσιν έρευνωμένη τών όντων έκάστου όλου.
Yet amidst this speculative ardour, and even wildness, we trace the
persistence of certain root-ideas, and are often reminded of his
intention (expressed with curious self-directed irony in 1850), “to
read Kant’s <i>Kritik</i> with a determination to make it agree with
Sir William Hamilton.”<a id="FNanchor_157" href="#Footnote_157" class="fnanchor">[157]</a></p>

<p>His coming of age, June 13, 1852, had been celebrated with a few quiet
words in his father’s<span class="pagenum" id="Page_166">[Pg 166]</span> letter of June 12, graced with the unusual
addition of a Scripture text—“I trust you will be as discreet when
Major as you have been while Minor (Prov. <span class="allsmcap">X</span>. <a id="FNanchor_158" href="#Footnote_158" class="fnanchor">[158]</a>).”</p>

<div class="sidenote">1853.</div>

<p>The six months from December 1852 to June 1853 were a time of great
and varied mental activity. When the Tripos work became most exacting,
he seemed to have the most spare energy. No part of the rich mental
life of Trinity failed to touch and stimulate him—from the Moral
Philosophy of the Master, to undergraduate discourses upon whist and
chess. When most burdened with analytical book-work, he yearned the
more deeply after comprehensive views of Nature and Life, and found
refreshment in metaphysical discussion, and occasionally in theological
controversy. Even the “occult” sciences, in the contemporary shapes
of electro-biology and table-turning, had their share of ironical
attention.</p>

<p>His relations with the dons, “scientific” and otherwise, whatever may
have been their first impression of him,<a id="FNanchor_159" href="#Footnote_159" class="fnanchor">[159]</a> were, for the most part,
smooth, but a humorous passage of arms between him and the Senior Dean
was long remembered in Trinity. The lines to J. A. Frere, although
somewhat personal, are too well known to be omitted from his collected
poems, and anything in them which might give offence at the time is
more than redeemed by the large humanity of the concluding stanza.<span class="pagenum" id="Page_167">[Pg 167]</span>
The following letter, addressed (but perhaps not sent) to the same
personage, throws an amusing light on the circumstances under which the
parody of “John Anderson” was written:—</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Rev. John Alexander Frere.</span></p>

<p class="right"><i>Trin. Coll., 26th Feb. 1853.</i></p>

<p><span class="allsmcap">Dear Sir</span>—Looking back on the past week I find I have kept
only seven chapels. I have no excuse to offer. The reason, however,
of the deficiency is this. Unaware that a Saint’s Day would occur in
the course of the week I parted with my surplice on Monday in order to
have it washed. I was thus prevented from appearing in chapel on the
evenings of Wednesday and Thursday, as otherwise I would have done.
I might even after this have completed the requisite number; but,
unfortunately, reading till a late hour on Friday night I found myself
unable to attend chapel on Saturday morning.</p>

<p>I can but hope that more forethought on my part may prevent the
recurrence of such accidents.</p>

<p>I have also to acknowledge the receipt of a small paper from you
relative to the observance of Sunday. I have read it, and will keep it
in mind.</p>

<p>Trusting that my past and future regularity may atone for my present
negligence, I remain, yours sincerely,</p>

<p class="right"><span class="allsmcap">J. C. Maxwell.</span></p>

<p><span class="allsmcap">Rev. J. A. Frere.</span></p>
</div>


<div class="sidenote2"><i>Æt.</i> 21.</div>

<p>It was while staying up at Easter in the spring of 1853, and working
“at high pressure,” that his longing for the untrammelled and reverent
investigation of Nature’s secrets found rhythmical expression in the
most serious of his poems, the “Student’s Evening Hymn,” in which
religious and philosophical aspirations are combined. Thus it was
always with him; when most plunged in the minute investigation either<span class="pagenum" id="Page_168">[Pg 168]</span>
of phenomena or of abstract ideas, he was most eager to rebound towards
the contemplation of the whole of things, and that which gives unity to
the whole. Yet no mind could be more averse from “viewiness,” or more
determined to bring every statement to the test of fact.</p>

<p>The brief remainder of that Easter vacation was spent at Birmingham
with his friend Johnson Gedge, a scholar of Trinity, whose father was
the headmaster of King Edward's School. The exactions of Trinity and
Hopkins had only left him a few days of holiday, and these were passed
in the manner already mentioned,<a id="FNanchor_160" href="#Footnote_160" class="fnanchor">[160]</a> in viewing the manufactures of
Birmingham. Mr. Clerk Maxwell's own delight in such things prevented
him from realising how laborious a programme he had suggested for the
interval between two long spells of severe head-work. Yet in the midst
of it Maxwell seems to have found time to contribute an elaborate piece
of humorous correspondence to the <i>King Edward's School Chronicle</i>.</p>

<p>When working hardest he was never a recluse, nor was he ever more
sociable than in his third year at college. He seems to have had
some difficulty even in avoiding supper parties, and one of his most
brilliant metaphysical <i>jeux d' esprit</i> purports to be a mode
of escaping from them. To the names already mentioned as amongst his
intimate friends, those of Farrar<a id="FNanchor_161" href="#Footnote_161" class="fnanchor">[161]</a> and Butler<a id="FNanchor_162" href="#Footnote_162" class="fnanchor">[162]</a> are now added.
Besides the<span class="pagenum" id="Page_169">[Pg 169]</span> metaphysical discussions, there were Shakespeare readings,
of which he was an auditor sometimes, if not an actor in them.</p>

<p>Whilst speaking of these side-sparks from his anvil, it is right
to keep in view the loyal and trustful spirit in which he did his
regularly-appointed work. His words on this subject in one of the
letters to Miss Cay, which will be given presently, are well worthy of
separate quotation here:—</p>

<div class="blockquot">

<p class="right">“<i>Trin. Coll., 7th June 1853.</i></p>

<p>“If any one asks how I am getting on in Mathematics, say that I am busy
arranging everything, so as to be able to express all distinctly, so
that examiners may be satisfied now, and pupils edified hereafter. It
is pleasant work, and very strengthening, but not nearly finished.”</p>
</div>

<p>As became his kindliness, he was still mindful of the freshmen.
Amongst these, Alexander Robertson, now Sheriff of Forfarshire,
the brother of Charles, and Frank Mackenzie, were Scotsmen and
compatriots. Another junior with whom he became still more intimate
was “Freshman Tayler,”<a id="FNanchor_163" href="#Footnote_163" class="fnanchor">[163]</a> so called, though now a junior Soph., in
contradistinction to Isaac Taylor. Like Frank Mackenzie and others
who have been mentioned, Freshman Tayler was of pious evangelical
antecedents. Maxwell's own thoughts at this time, as has been seen,
were taking a more decidedly religious colour, and this side also of
his rich and deep nature received a fresh impulse in this critical year.</p>


<div class="sidenote">1853.
<i>Æt.</i> 22.</div>

<p>He had been persuaded to spend the short interval between the summer
and vacation terms with the<span class="pagenum" id="Page_170">[Pg 170]</span> Rev. C. B. Tayler, rector of Otley, in
Suffolk, who had been touched with Maxwell’s kindness to his nephew.
Here he found himself for the first time in the midst of a large and
united English family, and in his half-speculative, half-emotional way,
was contrasting what he saw with the experience of an only son, when he
was suddenly taken ill. The long continuous strain of the past months
had been too much for him, and indeed it appears that even in the early
spring he had been physically below par.<a id="FNanchor_164" href="#Footnote_164" class="fnanchor">[164]</a> The illness is described
by Mr. Tayler as a sort of brain fever, and he was disabled by it for
more than a month. The Taylers nursed him as they would have nursed a
son of their own, and Maxwell, in whom the smallest kindnesses awakened
lasting gratitude, was profoundly moved by this. He referred to it long
afterwards as having given him a new perception of the Love of God.
One of his strongest convictions thenceforward was that “Love abideth,
though Knowledge vanish away.” And this came to him at the very height
of the intellectual struggle.<a id="FNanchor_165" href="#Footnote_165" class="fnanchor">[165]</a></p>

<p><span class="pagenum" id="Page_171">[Pg 171]</span></p>

<p>The father was also much affected by this kindness shown to his son.
Mr. Tayler had said nothing to make him anxious until the crisis of the
illness was past. But when he knows all, there is something more than
eloquence in his brief, inarticulate phrases of recognition:—</p>

<div class="blockquot">

<p>“With yours I have Mr. Tayler’s letter. I do not write to him to-day.
My only subject is thanks, and these are not to be measured in
words—the strongest I can use; so at present give my respects and
highest regards.”</p>
</div>

<p>Though weakened by his illness, Maxwell was able to keep the vacation
term, and profit by Hopkins’ continued training, before going home for
a few weeks of thorough refreshment. In the following term, with the
Senate-House examination in immediate prospect, he was careful not to
read inordinately hard.</p>

<p>In the autumn of this year the controversy which had been called forth
by Professor Maurice’s Theological<span class="pagenum" id="Page_172">[Pg 172]</span> Essays was brought to a crisis
through his deprivation of his office by Principal Jelf. Disputation on
this theme was nowhere more rife than amongst the scholars of Trinity,
and Maxwell’s remarks upon it will be read with interest even now.
He was from the first strongly attracted by Maurice’s combination of
intense Christian earnestness with universal sympathy, and although he
sometimes felt that the new teacher was apt to travesty the Popular
Theology in trying to delineate it, he had a deep respect for what
was positive in his doctrine. He was still more drawn to him when he
came to know him personally,—no longer as a writer, but as a friend.
A mention of Thomas Erskine of Linlathen in Mr. Maxwell’s letter of
16th December 1853, was probably occasioned by some question raised in
connection with Mr. Maurice.</p>

<p>The following letter, addressed to me by the Rev. G. W. H. Tayler, will
be read with interest in the light of the preceding narrative:—</p>

<div class="blockquot">

<p class="right"><i>Holy Trinity Vicarage,</i></p>

<p class="right"><i>Carlisle, 4th March 1882.</i></p>

<p><span class="allsmcap">My dear Sir</span>—You have asked me to send you some account of
James Maxwell, as I remember him during the space of three years, 1852,
1853, and 1854. My first acquaintance with him was about February 1852.
I was soon attracted by the frankness of his manner and the singular
charm of his quaint and original remarks in conversation.</p>

<p>We undergraduates felt we had a very uncommon personage amongst us; but
we did not then appreciate his rare powers. We had of course heard of
the reputation which he had at Edinburgh.</p>
</div>

<p><span class="pagenum" id="Page_173">[Pg 173]</span></p>

<div class="blockquot">

<p>But this acute mathematician, so addicted even then to <i>original</i>
research, was among his friends simply the most genial and amusing of
companions, the propounder of many a strange theory, the composer of
not a few poetic <i>jeux d’esprits</i>.</p>

<p>Grave and hard-reading students shook their heads at his discursive
talk and reading, and hinted that this kind of pursuits would never
<i>pay</i> in the long run in the Mathematical Tripos.</p>

<p>I have sometimes watched his countenance in the lecture-room. It was
quite a study—there was the look of a bright intellect, an entire
concentration on the subject, and sometimes a slight smile on the fine
expressive mouth, as some point came out clearly before him, or some
amusing fancy flitted across his imagination. He used to profess a
dislike to reproducing speculations from books, or hearing opinions
quoted taken bodily from books.</p>

<p>Yet he read a good deal in other lines of study than natural
philosophy. Sir Thomas Brown’s <i>Religio Medici</i> was one of his
favourite books. Any such author, who propounded his speculations in a
quaint, original manner was sure to be a favourite with him.</p>

<p>But I particularly remember his attraction to Sir Thomas Brown during
the long vacation, when he was laid up with severe illness (a brain
fever) in my dear uncle’s house in June 1853. He came to stay at Otley,
near Ipswich, of which my uncle was the rector. For a few days he was
tolerably well, then suddenly fell ill, probably through overwork for
his third year college examination. It was on his recovery from that
illness that I seemed to know him better than ever. It was then that my
uncle’s conversation seemed to make such a deep impression on his mind.
He had always been a regular attendant at the services of God’s house,
and a regular communicant in our College Chapel. Also he had thought
and read much on religious subjects. But at this time (as it appears
from his own account of the matter) his religious views were greatly
deepened and strengthened.</p>
</div>

<p><span class="pagenum" id="Page_174">[Pg 174]</span></p>

<div class="blockquot">

<p>I must add that I spent some little time in the long vacation of
1854 with Maxwell at Glenlair. His father was then living, and it
was touching to witness the perfect affection and confidence which
subsisted between father and son: the joy and satisfaction and exulting
pride which the father evidently felt in his son’s success and
well-earned fame; and, on the other hand, the tender, thoughtful care
and watchfulness which James Maxwell manifested towards his father.</p>

<p>Maxwell has indeed left a very bright memory and example. “We, his
contemporaries at college, have seen in him high powers of mind and
great capacity and original views, conjoined with deep humility before
his God, reverent submission to His will, and hearty belief in the
love and the atonement of that Divine Saviour who was his Portion and
Comforter in trouble and sickness, and his exceeding great reward.—I
remain, my dear sir, yours very truly,</p>

<p class="right"><span class="allsmcap">G. W. H. Tayler,</span><br>
<i>Vicar of Trinity Church, Carlisle.</i></p>
</div>

<p>Mr. Lawson of the Equity Bar, whose diary has preserved the remark
quoted on p. 133, has also furnished me with the following vivid
account of his impressions of Maxwell as an undergraduate:—</p>

<div class="blockquot">

<p class="right"><i>22 Old Square, Lincoln's Inn</i>,<br>
<i>London, W.C., 6th January 1882.</i></p>

<p>I was in his year at Trinity, and knew him intimately, though our ways
separated after I left Cambridge, and I scarcely ever saw him, except
once or twice when he was Professor at King’s College, and later on
only at very long intervals, on an occasional visit to the University.</p>

<p>There must be many of his quaint verses about, if one could lay hands
on them, for Maxwell was constantly producing something of the sort,
and bringing it round to his friends, with a sly chuckle at the humour,
which, though his own, no one enjoyed more than himself.</p>

<p>I remember Maxwell coming to me one morning with a<span class="pagenum" id="Page_175">[Pg 175]</span> copy of verses
beginning—“Gin a body meet a body Going through the air,” in which
he had twisted the well-known song into a description of the laws of
impact of solid bodies.</p>

<p>There was also a description which Maxwell wrote of some University
ceremony, I forget what, in which somebody “went before,” and somebody
“followed after,” and “in the midst were the wranglers playing with the
symbols.”</p>

<p>These last words, however meant, were in fact a description of his
own wonderful power. I remember one day in lecture, our lecturer had
filled the black board three times with the investigation of some hard
problem in Geometry of Three Dimensions, and was not at the end of it,
when Maxwell came up with a question whether it would not come out
geometrically, and showed how with a figure, and in a few lines, there
was the solution at once.<a id="FNanchor_166" href="#Footnote_166" class="fnanchor">[166]</a></p>
</div>

<div class="blockquot">

<p>Maxwell was, I daresay you remember, very fond of a talk upon almost
anything. He and I were pupils (at an enormous distance apart) of
Hopkins, and I well recollect how, when I had been working the night
before and all the morning at Hopkins's problems with little or no
result, Maxwell would come in for a gossip, and talk on while I was
wishing him far away, till at last, about half an hour or so before
our meeting at Hopkins’s, he would say—“Well, I must go to old Hop’s
problems;” and by the time we met there they were all done.</p>

<p>I remember Hopkins telling me, when speaking of Maxwell, either just
before or just after his degree, “It is not possible for that man to
think incorrectly on physical subjects;” and Hopkins, as you know, had
had perhaps more experience of mathematical minds than any man of his
time.</p>

<p>Of Maxwell’s geniality and kindness of heart you will have had many
instances. Every one who knew him<span class="pagenum" id="Page_176">[Pg 176]</span> at Trinity can recall some kindness
or some act of his which has left an ineffaceable impression of his
goodness on the memory—for “good ” Maxwell was, in the best sense of
the word.</p>
</div>

<p>Mr. Lawson adds the following extract from his diary:—</p>

<div class="blockquot">

<p>Under date January 1. 1854 (Sunday evening), after saying I had been
at tea at a friend’s rooms, and naming the men who were there, of whom
Maxwell was one, there is this note:—</p>

<p>“Maxwell, as usual, showing himself acquainted with every subject upon
which the conversation turned. I never met a man like him. I do believe
there is not a single subject on which he cannot talk, and talk well
too, displaying always the most curious and out-of-the-way information.”</p>
</div>

<div class="sidenote">1854.
<i>Æt.</i> 22.</div>

<p>The great contests of January came at last, with the result that
Maxwell was Second Wrangler, Routh of Peterhouse being the Senior, and
that Routh and Maxwell were declared equal as Smith’s Prizemen.</p>

<p>A reminiscence of Professor T. S. Baynes which has reference to this
time is interesting in connection with other signs of something
exceptional in Maxwell’s physical state during the previous year:—</p>

<div class="blockquot">

<p>He said that on entering the Senate-house for the first paper he
felt his mind almost blank; but by and by his mental vision became
preternaturally clear. And, on going out again, he was dizzy and
staggering, and was some time in coming to himself.</p>
</div>

<p class="nindc space-above2">
<span class="allsmcap">Letters, 1852-53.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>8 King’s Parade, 10th Feb. 1852.</i></p>

<div class="sidenote"><i>Æt.</i> 20.</div>

<p>I was at Isaac Taylor’s to-night. His father has come to<span class="pagenum" id="Page_177">[Pg 177]</span> see him, a
little, cold man, with a tremulous voice, who talks about the weather
as if he were upon oath, but who can lift up his testimony against any
unwarrantable statement. Taylor junr. and Maclennan were talking about
associations of workmen, Christian socialism, and so forth. T. junr.
approved of the system where each workman has a share in the firm. M.
liked one master better than many.</p>

<p>T. senr. described the inducement to hard work among engineers at
Manchester; the reward is not profit, but situation.</p>

<p>There are advantages in subordination, besides good direction, for
it supplies an <i>end</i> to each man, external to himself. Activity
requires Objectivity.—Do you ever read books written by women about
women? I mean fictitious tales, illustrating Moral Anatomy, by
disclosing all thoughts, motives, and secret sins, as if the authoress
were a perjured confessor. There you find all the good thinking about
themselves, and plotting self-improvement from a sincere regard to
their own interest, while the bad are most disinterestedly plotting
against or for others, as the case may be; but all are caged in and
compelled to criticise one another till nothing is left, and you
exclaim:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Madam! if I know your sex,</div>
    <div class="verse indent0">By the fashion of your bones.”</div>
  </div>
</div>
</div>

<p class="nind">
No wonder people get hypochondriac if their souls are made to go
through manœuvres before a mirror. Objectivity alone is favourable to
the free circulation of the soul. But let the Object be real and not
an Image of the mind’s own creating, for Idolatry is Subjectivity with
respect to gods. Let a man feel that he is wide awake,—that he has
something to do, which he has authority, power, and will to do, and is
doing; but let him not cherish a consciousness of these things as if
he had them at his command, but receive them thankfully and use them
strenuously, and exchange them freely for other objects. He has then a
happiness which may be increased in degree, but cannot be altered in
kind.</p>
</div>

<p><span class="pagenum" id="Page_178">[Pg 178]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>8 King's Parade, 7th March 1852.</i></p>

<p>I have now nobody that I see too much of, though I have got several
new acquaintances, and improved several old ones. I find nothing gives
one greater <i>inertia</i> than knowing a good many men at a time,
who do not know each other intimately. <i>N.B.</i>—<i>Inertia</i>,
not = <i>laziness</i>, but <i>mass</i>; <i>i.e.</i> if one knows a
man, he forms an idea of your character, and treats you accordingly.
If one knows a company of men, they are strong in union, and overawe
the individual. If one man only, we become mutual tyrants. If several
independently, every one plays the part of Dr. Watt’s celebrated “Busy.
Bee,” and by mixing according to every possible combination hit out the
best results. Now you see I am theorising again and preaching as of
old; but the fact is, I am always laying plans and preaching to myself
till I seek for some one to whom I may disgorge without fear of an
immediate reply. Now, my great plan, which was conceived of old, and
quickens and kicks periodically, and is continually making itself more
obtrusive, is a plan of <i>Search</i> and <i>Recovery</i>, or Revision
and Correction, or Inquisition and Execution, etc. The Rule of the
Plan is to let nothing be wilfully left unexamined. Nothing is to be
<i>holy ground</i> consecrated to Stationary Faith, whether positive or
negative. All fallow land is to be ploughed up, and a regular system
of rotation followed. All creatures as agents or as patients are to
be pressed into the service, which is never to be willingly suspended
till nothing more remains to be done; <i>i.e.</i> till <span class="allsmcap">A.D.</span>
+\(\propto\). The part of the rule which respects self-improvement by
means of others is:—Never hide anything, be it weed or no, nor seem
to wish it hidden. So shall all men passing by pluck up the weeds
and brandish them in your face, or at least display them for your
inspection (especially if you make no secret of your intention to do
likewise). (I speak not here literally of the case of those who revise
each other’s faults every night, and quarrel before the month is out,
but you did not so misunderstand me.) Again I assert the Right of<span class="pagenum" id="Page_179">[Pg 179]</span>
Trespass on any plot of Holy Ground which any man has set apart (as the
rustics did their Gude-man’s Rig) to the power of Darkness. Such places
must be exorcised and desecrated till they become fruitful fields.
Again, if the holder of such property refuse admission to the exorcist,
he <i>ipso facto</i> admits that it is consecrated, and that he fears
the power of Darkness. It may be that no such darkness really broods
over the place, and that the man has got a habit of shutting his eyes
in that field, which makes him think so.</p>

<p>How I am convinced that no one but a Christian can actually purge his
land of these holy spots. Any one may profess that he has none, but
something will sooner or later occur to every one to show him that
part of his ground is not open to the public. Intrusions on this are
resented, and so its existence is demonstrated. How, I do not say that
no Christians have enclosed places of this sort. Many have a great
deal, and every one has some. No one can be sure of all being open
till all has been examined by competent persons, which is the work,
as I said before, of eternity. But there are extensive and important
tracts in the territory of the Scoffer, the Pantheist, the Quietist,
Formalist, Dogmatist, Sensualist, and the rest, which are openly and
solemnly <i>Tabooed</i>, as the Polynesians say, and are not to be
spoken of without sacrilege.</p>

<p>Christianity—that is, the religion of the Bible—is the only scheme or
form of belief which disavows any possessions on such a tenure. Here
alone all is free. You may fly to the ends of the world and find no God
but the Author of Salvation. You may search the Scriptures and not find
a text to stop you in your explorations.</p>

<p>You may read all History and be compelled to wonder but not to doubt.</p>

<p>Compare the God of Abraham, Isaac, and Jacob with the God of the
Prophets and the God of the Apostles, and however the Pantheist may
contrast the God of Nature with the “Dark Hebrew God,” you will find
them much liker each other than either like his.</p>

<p>The Old Testament and the Mosaic Law and Judaism<span class="pagenum" id="Page_180">[Pg 180]</span> are commonly supposed
to be “Tabooed” by the orthodox. Sceptics pretend to have read
them, and have found certain witty objections and composed several
transcendental arguments against Hebrew O’ Clo’,” which too many of the
orthodox unread admit, and shut up the subject as haunted. But a Candle
is coming to drive out all Ghosts and Bugbears. Let us all follow the
Light.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>8 King’s Parade, 23d March 1852.</i></p>

<p>I received yours (of the 18th I suppose) on Saturday, and began to muse
on the difference of our modes of life: your sickness—my health; your
kind dealings with neighbours—our utter independence of each other;
you visit without seeing people—we see without visiting each other;
you hear all about people’s families and domestic concerns—we do not,
but we know exactly how everybody is up in his different subjects, and
what are his favourite pursuits for the time.</p>

<p>The Little-go is now going on, so I am taking my Easter vacation at
this time. I do nothing but the papers in the Senate-house, and then
spend the day in walks and company, reading books of a pleasant but not
too light kind, lest I should be disgusted with recreation.</p>

<p>I find myself quite at grass, and am sure that in 10 days I will be
reading again as if I had been rusticated for a year.</p>

<p>I never did such a feat as get up at 5 in the morning. I get up at 6.30
for chapel in winter, and read in the day-time, but I have now begun my
summer practice of sleeping in the mornings and reading at night, save
when I get up on a fine day to take a walk in the morning, which makes
me idle all day, and is sometimes agreeable.</p>

<p>I met old Isaac Taylor in his son’s rooms some time ago. He began by
speaking of the weather in a serious way, and went on to his Manchester
concerns,—effective motives to work, actual methods adopted, and so
got into the merits of socialism, joint-stock workmen’s associations,<span class="pagenum" id="Page_181">[Pg 181]</span>
and so forth, appearing all the while to say nothing, but quietly feed
on the wisdom of the undergrads., as they enounced their opinions.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 10th April 1852.</i></p>

<p>The Ordnance Surveyors are doing Contour Lines. The line 250 feet above
sea-level passes just in front of the Bees.<a id="FNanchor_167" href="#Footnote_167" class="fnanchor">[167]</a></p>


<p class="right"><i>Glenlair, 25th April 1852.</i></p>

<p>I ... congratulate you on your scholarship. You write of entering on
the duties,—what are they? and what are the Privileges and Profits?</p>


<p class="right"><i>Glenlair, 12th May 1852.</i></p>

<p>Is M'Millan the Publisher of the <i>Cambridge and Dublin</i>, whereof
William Thomson is editor? Have you sent him your prop, you were doing
at Christmastime?</p>

<p>The gold-fever of Australian type prevails in these parts.</p>


<p class="right"><i>Glenlair, 19th May 1852.</i></p>

<p class="nindc">[Prop, about resistance of sides and bottom of a meal-ark.]</p>

<p>... The meal, which may be called a fluid as much as a glacier.<a id="FNanchor_168" href="#Footnote_168" class="fnanchor">[168]</a></p>

<p>Query: Whether by putting bars beneath the bottom at points removed
from the middle of the joist, the pressure would be more advantageously
distributed?</p>


<p class="right"><i>Glenlair, 12th June 1852.</i></p>

<p class="nindc">[Eve of James C. M.’s 21st birthday.]</p>

<p>I trust you will be as discreet when major as you have been while minor
(Prov. <span class="allsmcap">X</span>. 1).</p>

<p>Remember me to Tait. I am sorry I did not see him in Edinburgh to wish
him joy of his honours.</p>
</div>

<p><span class="pagenum" id="Page_182">[Pg 182]</span></p>

<div class="blockquot">

<p class="right"><i>Glenlair, 29th June 1852.</i></p>

<div class="sidenote"><i>Æt.</i> 21.</div>

<p>Did you take to the Geology at all? I suppose that the cliffs at
Lowestoft are Tertiary, with plenty of fossils.</p>


<p class="right"><i>Glenlair, 9th Novr. 1852.</i></p>

<p class="nindc">Nativity of the Prince of Wales.</p>

<p>Received yours of St. Guy and William.</p>

<p>The Cambridge Commission as you report of it will not affect you in any
way.</p>

<p>What sort of thing is “College Declamation”? You say you have chosen
The Scottish Covenanters. Do you take the part of Advocate or Apologist
for them? or do you try the impartial historian? It would be difficult
to give the Scots Prelates their due without offending some of the
Order. During the Persecutions both the civil and ecclesiastical
government of Scotland was getting ripe for the Revolution.</p>


<p class="right"><i>Glenlair, 11th Novr. 1852.</i></p>

<p>It has been said, Had there been two other Leightons instead of Sharp
of St. Andrews and —— —— of Galloway, Episcopacy would have been
securely established.</p>


<p class="right"><i>Glenlair, 2d Feb. 1853.</i></p>

<p>Aunty Jane was saying—a glass of wine daily,—port for preference.</p>

<p class="right"><i>Glenlair, 12th Feb. 1853.</i></p>

<p>... <i>Mathematical Journal</i>, to which you send props. What props.?
The one about the Pendulum?</p>


<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Trin. Coll., 20th Feb. 1853.</i></p>

<p>After Chapel I was at Litchfield’s, where he, Farrar, Pomeroy, and
Blakiston, discussed eternal punishment from 8 to 12. Men fall into
absurdity as soon as they have settled for themselves the question of
the origin of evil. A man whose mind is “made up” on that subject is
contradictory<span class="pagenum" id="Page_183">[Pg 183]</span> on every other; one day he says that the man that can
be happy in such a world is a brute, and the next day that if a man
is not happy here he is a moping fool. At last they assert the Cretan
dilemma, that if a man says that man is ignorant and foolish, it was
ignorant and foolish to say so. Solomon, they say, was used up when
he wrote Ecclesiastes, and said “all is vanity” in a relative sense,
having himself been so. Solomon describes the search after Happiness
for its own sake and for the sake of possession. It is as if a strong
man should collect into his house all the beauty of the world, and be
condemned to look out of the window and marvel that no good thing was
to be seen. “No man can eat his cake and have it.” I would add that
what remains till to-morrow will stink.</p>

<p>As for evil being unripe good, I say nothing with respect to objective
evil, except that it is a part of the universe which it may be the
business of immortal man to search out for ever, and still see more
beyond. We cannot understand it because it is relative, and relative to
more than we know. But subjective evil is absolute; we are conscious of
it as independent of external circumstances; its physical <i>power</i>
is bounded by our finitude, bodily and mental, but within these its
<i>intensity</i> is without measure. A bullet may be diverted from its
course by the medium through which it passes, or it may take a wrong
one owing to the unskilfulness of the shooter, or the intended victim
may change his place; but all this depends, not on the will of the
shooter, but on the ignorance of his mind, the weakness of his body,
the resistance of inert matter, or the subsequent act of another agent;
the bullet of the murderer may be turned aside to drive a nail, or what
not, but his will is independent of all this, and may be judged at once
without appeal.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Yet still the lady shook her head,</div>
    <div class="verse indent2">And swore by yea and nay,</div>
    <div class="verse indent0">My whole was all that he had said,</div>
    <div class="verse indent2">And all that he could say.</div>
    <div class="verse indent22"><span class="allsmcap">J. C. Maxwell.</span></div>
  </div>
</div>
</div>
</div>

<p><span class="pagenum" id="Page_184">[Pg 184]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Edinburgh, 21st February 1853.</i></p>

<p>The Halo and accompaniment of the 15th had been very curious. I never
saw the appearance of Mock Suns.</p>

<p>Lord Cockburn went in plain dress to the fancy ball. When the crowd
hissed him, he said he was the minister that was to marry them all!!</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Trin. Coll., 11th March 1853.</i></p>

<p>I was so much among the year that is now departed that it makes a
great difference in my mode of life. I have been seeking among the
other years for some one to keep me in order. It is easier to find
instructive men than influential ones. I left off here last night to go
to a man’s rooms where I met several others, who had gone a-prowling
like me.... I have been reading Archdeacon Hare’s sermons, which are
good.</p>


<p class="right"><i>Trin. Coll., Feast of St. Charles II.</i></p>

<p>Pomeroy’s mother and sister were up here lately. They used to be at
Cheltenham. From them I learnt a good deal about the systematic and
uncompromising mode of thinking and speaking which marks the great
Irish Giant of Trinity. Bishop Selwyn of New Zealand prought<a id="FNanchor_169" href="#Footnote_169" class="fnanchor">[169]</a> here
yesterday about missions. He founded the Lady Margaret boat club at
John’s, and got the boat to the head of the river. He was 2d Classic in
1831, and still he is too energetic for his curates to keep up with him
in his own visitations about the South Pole. He made a great impression
on the men here by his plainness of speech and absence of all cant,
whether he spoke of the doctrines of Christianity or the history of
Pitcairn’s Island. I have been reading various books, but few very
entertaining. They are chiefly theories about things in general which
take the fancies of men now-a-days. The only safe way to<span class="pagenum" id="Page_185">[Pg 185]</span> read them is
to find out the facts first. With this precaution they are tolerably
transparent. I have been attending Sir James Stephen’s lectures upon
the causes of the first French Revolution. They are now done, so I look
in upon Stokes’ dealing with light.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Edinburgh, 13th March 1853.</i></p>

<p>Ask Gedge to get you instructions to Brummagem workshops. View,
if you can, armourers, gunmaking and gunproving—swordmaking
and proving—<i>Papier-maché</i> and japanning—silver-plating
by cementation and rolling—ditto, electrotype—Elkington’s
Works—Brazier’s works, by founding and by striking up in
dies—turning—spinning teapot bodies in white metal, etc.—making
buttons of sorts, steel pens, needles, pins, and any sorts of small
articles which are curiously done by subdivision of labour and by
ingenious tools—glass of sorts is among the works of the place,
and all kinds of foundry work—engine-making—tools and instruments
(optical and philosophical) both coarse and fine. If you have had
enough of the town lots of Birmingham, you could vary the recreation
by viewing Kenilworth, Warwick, Leamington, Stratford-on-Avon, or
suchlike.<a id="FNanchor_170" href="#Footnote_170" class="fnanchor">[170]</a></p>


<p class="right"><i>Glenlair, 29th April 1853.</i></p>

<p>You write (from King Edward’s School, Birmingham) about plans and
visits. Freshman Tayler and two others innominate.</p>


<p class="right"><i>Glenlair, 12th May 1853.</i></p>

<p>What do you know of Henry Mackenzie? Do you find Frank to be clever,
good, agreeable, and wise, which you state to be the desiderata for a
friend?</p>

<p>Here is a Prop. anent fuel. What would be the amount of heat evolved
in the combustion of a given weight of dry wood compared with the same
weight of coal?</p>
</div>

<p><span class="pagenum" id="Page_186">[Pg 186]</span></p>

<div class="blockquot">

<p class="right"><i>Glenlair, The Day after the Wedding</i>,<a id="FNanchor_171" href="#Footnote_171" class="fnanchor">[171]</a><br>
<i>1st June</i>(<i>1853</i>).</p>

<p>I have yours of the clay of the Restoration.... She (Maria Clerk) also
wrote about the new phase of animal magnetism called table-Turning. Do
you know about that?</p>

<p>Photography is also in the ascendant. You will, no doubt, be at
Ipswich, I believe an ancient city, and hath old kirks and sundries
worthy of notice. Is Otley towards the sea? Douking, etc.?</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Trin. Coll., 7th June 1853.</i></p>

<p>I have an engagement to go and visit a man in Suffolk, but the spare
bed is at present occupied by the “celebrated Dr. Ting of America.” I
only wait here for his departure. I spent to-day in a great sorting of
papers and arranging of the same. Much is bequeathed to the bedmaker,
and a number of duplicate examination papers are laid up to give to
friends.</p>

<p>I intend to-morrow to get up early and make breakfast for all the men
who are going down, wakening them in good time; then read Wordsworth’s
<i>Prelude</i> till sleepy; then sally forth and see if all the
colleges are shut up for the season; and then go and stroll in the
fields and fraternise with the young frogs and old water-rats. In the
evening, something not mathematical. Perhaps write a biographical
sketch of Dr. Ting of America, of whom you know as much as I do.
To-morrow evening, or next day, our list comes out. You will hear of
it from the Robertsons if in town, or Mackenzie if not. I have done
better papers than those of this examination; but if the examiners are
not satisfied with them it is not my fault, for they are better than
they have yet seen of mine. If any one asks how I am getting on in
mathematics, say that I am busy arranging everything so as to be able
to express all distinctly, so that examiners may be satisfied now and
pupils edified hereafter.<span class="pagenum" id="Page_187">[Pg 187]</span> It is pleasant work and very strengthening,
but not nearly finished.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 24th June 1853.</i></p>

<div class="sidenote2"><i>Æt.</i> 22.</div>

<p>I have just received your letter and Mr. Tayler’s. You may be sure I
am thankful to hear of your recovering, although not previously made
anxious about the illness. I cannot but think of the fever fit you
had in Edinburgh after an Academy exam., when we had settled to go to
Melrose—that was in 1846.<a id="FNanchor_172" href="#Footnote_172" class="fnanchor">[172]</a> Nothing can exceed the kindness of Mr.
and Mrs. Tayler, and I hope you will not need long nursing. If you are
well and not much hindered, you can let me know more fully how you are
getting on. Neither you nor Mr. Tayler mention the day you were taken
ill. Mr. T.’s letter is dated 22d.</p>


<p class="right"><i>Glenlair, 28th June 1853.</i></p>

<p>I am most thankful and happy to hear of your convalescence through Mr.
Tayler’s most kind and daily bulletins. I know not how sufficiently to
thank Mr. and Mrs. Tayler for their very great kindness. I think you
may be best to come home, when fit to travel, for further recreation.</p>


<p class="right"><i>Glenlair, 1st July 1853.</i></p>

<p>Mr. Tayler says, both truly and kindly, “You must be his guest till you
are fit to travel.” ...</p>

<p>With yours I have Mr. Tayler’s letter of 28th. I do not write to him
to-day. My only subject is thanks, and these are not to be measured in
words—the strongest that I can use; so at present give my respects and
highest regards.</p>
</div>

<p><span class="pagenum" id="Page_188">[Pg 188]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Key. C. B. Tayler.</span></p>

<p class="right"><i>Trin. Coll., 8th July 1858.</i><br>
<i>Evening Post.</i></p>

<p><span class="allsmcap">My dear Friend</span>—Your letter was handed to me by the postman
as I was taking a walk after morning chapel. As I was engaged then, I
thought I might wait till the evening. I breakfasted with Macmillan the
publisher, who has a man called Alexander Smith with him, who published
a volume of poems in the beginning of the year which have been much
read here, and, indeed, everywhere, for 3000 copies have been sold
already. He is a designer of patterns for needlework, and he refuses
to be made celebrated or to leave his trade. He speaks strong Glasgow,
but without affectation, and is well-informed without the pretence of
education, commonly so called. People would not expect from such a
man a book in which the author seems to transfer all his own states
of mind to the objects he sees. But he is young and may get wiser as
he gets older. He sees and can tell of the beauty of things, but he
connects them artificially. He may come to prefer the real and natural
connection, and after that he may perhaps stir us all up by bringing
before us real human objects of interest he has only dimly seen in the
solitude of his youth.</p>

<p>I told you how I meant to go to Hopkins. He was not in. I had a
talk with him on Sunday; he recommended light work for a while, and
afterwards he would give me an opportunity of making up what I had lost
by absence. Yesterday I did a paper of his on the Differential Calculus
without fatigue, and as well as usual. Ask George how Mr. Hughes has
arranged about Examinations. I will write to him soon, and send him a
mass of papers in an open packet, to be taken twice a week, or not so
often.</p>

<p>You dimly allude to the process of spoiling which has gone on during
the last 2 years. I admit that people have been kind to me, and also
that I have seen more variety than in other years; but I maintain that
all the evil influences<span class="pagenum" id="Page_189">[Pg 189]</span> that I can trace have been internal and not
external, you know what I mean—that I have the capacity of being more
wicked than any example that man could set me, and that if I escape,
it is only by God’s grace helping me to get rid of myself, partially
in science, more completely in society,—but not perfectly except by
committing myself to God as the instrument of His will, not doubtfully,
but in the certain hope that that Will will be plain enough at the
proper time. Nevertheless, you see things from the outside directly,
and I only by reflexion, so I hope that you will not tell me you
have little fault to find with me, without finding that little and
communicating it.</p>

<p>In the <i>Athenæum</i> of the 2d there is Faraday’s account of his
experiments on Table-turning, proving mechanically that the table is
moved by the unconscious pressure of the fingers of the people wishing
it to move, and proving besides that Table-turners may be honest.
The consequence has been that letters are being written to Faraday
boastfully demanding explanations of this, that, and the other thing,
as if Faraday had made a proclamation of Omniscience. Such is the fate
of men who make real experiments in the popular occult sciences,—a
fate very easy to be borne in silence and confidence by those who do
not depend on popular opinion, or learned opinion either, but on the
observation of Facts in rational combination. Our anti-scientific men
here triumph over Faraday.</p>

<p>I hope the Rectory has flourished during the absence of you and Mrs.
Tayler. I had got into habits with you of expecting things to happen,
and if I wake at night I think the gruel is coming.</p>

<p>Macmillan was talking to me to-day about elementary books of natural
science, and he had found the deficiency, but had a good report of
“Philosophy in Sport made Science in Earnest,” which I spoke of with
you. When I am settled I will put down some first principles and
practicable experiments on Light for Charlie, who is to write to me and
answer questions proposed; but this in good time.—Your affectionate
friend,</p>

<p class="right"><span class="allsmcap">J. C. Maxwell.</span></p>
</div>

<p><span class="pagenum" id="Page_190">[Pg 190]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Trin. Coll., 14th July 1853.</i></p>

<p>You wrote just in time for your letter to reach me as I reached
Cambridge. After examination I went to visit the Rev. C. B. Tayler
(uncle to a Tayler whom I think you have seen under the name of
<i>Freshman</i>, etc., and author of many tracts and other didactic
works). We had little expedites, and walks, and things parochial and
educational, and domesticity. I intended to return on the 18th June,
but on the 17th I felt unwell, and took measures accordingly to be well
again—<i>i.e.</i> went to bed, and made up my mind to recover. But
it lasted more than a fortnight, during which time I was taken care
of beyond expectation (not that I did not expect much before). When
I was perfectly useless, and could not sit up without fainting, Mr.
Tayler did everything for me in such a way that I had no fear of giving
trouble. So did Mrs. Tayler; and the two nephews did all they could.
So they kept me in great happiness all the time, and detained me till
I was able to walk about, and got back strength. I returned on the 4th
July.</p>

<p>The consequence of all this is that I correspond with Mr. Tayler,
and have entered into bonds with the nephews, of all of whom more
hereafter. Since I came here I have been attending Hop., but with his
approval did not begin full swing. I am getting on, though, and the
work is not grinding on the prepared brain.</p>

<p>I have been reading <i>Villette</i> by Currer Bell <i>alias</i> Miss
Bronte. I think the authoress of Jane Eyre has not ceased to think and
acquire principles since that work left her hands.</p>

<p>It is autobiographic in form. The <i>ego</i> is a personage of great
self-knowledge and self-restraint, strength of principle and courage
when roused, otherwise preferring the station of an onlooker.</p>

<p>Then there is an excellent prying, upright, Jesuitical, and successful
French school directress; a fiery, finical, physiognomic professor,
priestridden, but taking his own way in benevolence as in other things,
etc. etc.</p>
</div>

<p><span class="pagenum" id="Page_191">[Pg 191]</span></p>

<div class="blockquot">

<p>Faraday’s experiments on Table-turning, and the answers of provoked
believers and the state of opinion generally, show what the state of
the public mind is with respect to the <i>principles</i> of natural
science. The law of gravitation and the wonderful effects of the
electric fluid are things which you can ascertain by asking any man or
woman not deprived by penury or exclusiveness of ordinary information.
But they believe them just as they believe history, because it is in
books and is not doubted. So that facts in natural science are believed
on account of the number of witnesses, as they ought! I believe that
tables are turned; yea! and by an unknown force called, if you please,
the vital force, acting, as believers say, thro’ the fingers. But
how does it affect the table? By the <i>mechanical</i> action of the
sideward pressure of the fingers in the direction the table ought to
go, as Faraday has shown. At this last statement the Turners recoil.</p>


<p class="nindc"><span class="allsmcap">To R. B. Litchfield, Esq.</span></p>

<p class="right"><i>Coniston, 23d August 1853.</i></p>

<p>I came here with Campbell of Trin. Hall to meet his brother and another
Oxford man called Christie.<a id="FNanchor_173" href="#Footnote_173" class="fnanchor">[173]</a> We are all in a house<a id="FNanchor_174" href="#Footnote_174" class="fnanchor">[174]</a> just above
the lake, recreating ourselves and reading a little. Pomeroy is off
to Ireland. I have seen a good deal of him, and we have read “at the
same time successively” <i>Vestiges of Creation</i> and Maurice’s
<i>Theological Essays</i>. Both have excited thought and talk.... I was
down after the Mug<a id="FNanchor_175" href="#Footnote_175" class="fnanchor">[175]</a> with Tayler’s uncle in Suffolk, and was taken
in there. I was there made acquainted with the peculiar constitution
of a well-regulated family, consisting entirely of nephews and nieces,
and educated entirely by the uncle and aunt. There was plenty of
willing obedience, but little diligence: much mutual trust, and little
self-reliance. They did not strike out for themselves in different
lines, according to age, sex, and disposition, but each so excessively
sympathised (<i>bonâ fide</i>, of course) with the rest,<span class="pagenum" id="Page_192">[Pg 192]</span> that one
could not be surprised at hearing any one take part in criticising his
own action.</p>
</div>

<div class="blockquot">

<p>In such a case some would recommend “a little whole—some neglect.”
I would suggest something like the scheme of self-emancipation for
slaves. Let each member of the family be allowed some little province
of thought, work, or study, which is not to be too much enquired into
or sympathised with or encouraged by the rest, and let the limits of
this be enlarged till he has a wide, free field of independent action,
which increases the resources of the family so much the more as it is
peculiarly his own.</p>

<p>I see daily more and more reason to believe that the study of the “dark
sciences” is one which will repay investigation. I think that what is
called the proneness to superstition in the present day is much more
significant than some make it. The prevalence of a misdirected tendency
proves the misdirection of a prevalent tendency. It is the nature and
object of this tendency that calls for examination.</p>


<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Glenlair, 15th September 1853.</i></p>

<p>I see that Principal Jelf is going to “have up” Maurice for heresy
published in his <i>Theological Essays</i>. The consequence will
probably be that some others unconnected with Maurice will be set
upon, and will perhaps join with him in self-defence, or at least be
associated with him in popular opinion.</p>

<p>If the row becomes general it will be the controversy of the day. They
have no firm and dogmatic statements to grapple with, but they will
soon make them. All the ordinary disputes have been revivals of the
<i>letter</i> of old contests. Here we have the very spirit of all
reformations; an attempt must be made to find what is requisite to a
Christian system, and whether the “variables” of such a system ought
to remain constant, as they were at some arbitrary epoch (that of
sect-founders, Fathers, General Councils, Reformers, etc.), and not
rather to be trusted to the true and approved Christians of every age.</p>
</div>

<p><span class="pagenum" id="Page_193">[Pg 193]</span></p>

<div class="blockquot">

<p>But he that is misty let him be misty still, and the same for him that
is shallow; but let him that is active not mar his activity by “tearing
his neighbours in their slime,” or by ascending into the thick mist and
walking with “Death and Morning on the silver horns.”</p>


<p class="nindc"><span class="allsmcap">From His Father.</span></p>

<p class="right"><i>Glenlair, 10th October 1853.</i></p>

<p>I have set up the rain-gauge in the middle of the garden at the
crossing of the gooseberry bushes at the Camomile. I think it will do.</p>

<p>As to changing your rooms—I suppose from that, you have settled to
continue for a time at Cambridge and to look out for a fellowship.</p>


<p class="right"><i>Glenlair, 28th October 1853.</i></p>

<p>Be sure to keep a long way within your powers of working, and then you
may do well whatever you undertake.</p>


<p class="right"><i>Glenlair, 13th November 1853.</i></p>

<p>Your letter was chiefly a dissertation on the election of Examinators;
the names were all strange to me, except our old friend Charles
Mackenzie.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Trin. Coll., 12th November 1853.</i></p>

<p>I am in a regular state of health though not a very regular state of
reading, for I hold that it is a pernicious practice to read when
one is not inclined for it. So I read occasionally for a week and
then miss a few days, always remembering to do whatsoever College
and Hopkins prescribe to be done, and avoiding anything more. Allan
Stewart was up a week ago to be made a bye Fellow of Peterhouse, so
you may congratulate him when you see him. He is to be in Edinburgh
this winter. Frank Mackenzie is up, and seems pretty well. He tells
me that he does not sit up late; but as I have not the management of
his candles I do not know what that means with him. I have<span class="pagenum" id="Page_194">[Pg 194]</span> not been
up after twelve for a long time except on Saturdays when I am not
reading.... You will have heard how the Council of King’s College
have sat upon Professor Maurice and intend to turn him out of the
college. So there are pamphlets and replies on the meaning of the word
“Eternal,” and broadsides of the Record on the side of the attack. I
see that the Rev. Berkeley Addison is in trouble about the Scottish
Reformation Society, for associating with non-episcopal clergymen.</p>


<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Trin. Coll., 3d Dec. 1853.</i></p>

<p>... We have the usual amount of discussion here on labour parliaments,
multiplicity of votes, Eternity and Maurice and Jelf, or the contest
between those who think that there is a real depth to which thought
must go, though words cannot well follow it, and those who maintain
that which is not obvious to a man of sense, cannot be really connected
with a religion which is not confined to deep thinkers, but professes
to afford the highest principles to the simple. That is what most men
discuss. Maurice has settled it for himself, believing that the things
of which he treats do actually form the necessary thoughts of all men
whether learned or no.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 16th December 1853.</i></p>

<p>I knew Thomas Erskine of Linlathen very well long ago. He and his
mother and sisters lived in No. 30 Heriot Row. He came to the Bar in
Edinburgh the year before me. He is related to George Dundas, and
Stirlings, and Erskines, and many families we visited. For long he has
lived at Linlathen, near Dundee, and is author of various religious
books.</p>

<p>Your dissertation on the parties in the Church of England goes far
beyond my knowledge. I would need an explanatory lecture first,
and before I can follow the High, Broad, and Low, through their
ramifications.</p>
</div>

<p><span class="pagenum" id="Page_195">[Pg 195]</span></p>

<div class="blockquot">

<p class="right"><i>Penicuik, 30th December 1853.</i></p>

<p>You will need to get muffetees for the Senate-Room. Take your plaid or
rug to wrap round your feet and legs.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Trin. Coll., 13th January 1854.</i></p>

<p>All my correspondents have been writing to me, which is kind, and have
not been writing questions, which is kinder. So I answer you now, while
I am slacking speed to get up steam, leaving Lewis and Stewart, etc.,
till next week, when I will give an account of the five days. There are
a good many up here at present, and we get on very jolly on the whole,
but some are not well, and some are going to be plucked or gulphed,
as the case may be, and others are reading so hard that they are
invisible. I go to-morrow to breakfast with shaky men, and after food
I am to go and hear the list read out, and whether they are through,
and bring them word. When the honour list comes out the poll-men act as
messengers. Bob Campbell comes in occasionally of an evening now, to
discuss matters and vary sports. During examination I have had men at
night working with gutta-percha, magnets, etc. It is much better than
reading novels or talking after 5½ hours’ hard writing.</p>

<p>Hunter is up here all the vacation. Do you know anything of him
in Edinburgh? His father, who is dead, or his uncle, were known
in Edinburgh, but I am not up in that subject. The present man is
a freshman at Queen’s, and is a thundering mathematician, is well
informed on political, literary, and speculative subjects, and is
withal a jolly sort of fellow with some human nature at the bottom, and
lots of good humour all through. He does not talk much, and when he
does it is broad Scotch and to the purpose. I hope to see more of him
next term. Old Charlie Robertson is in better case I think than usual,
and rejoices in the good opinion of several men whose opinion is most
worth having. He has become better known and better estimated of late,
especially since Sandy<a id="FNanchor_176" href="#Footnote_176" class="fnanchor">[176]</a> came up.<span class="pagenum" id="Page_196">[Pg 196]</span> He did pretty well in the three
days, and does not fret about anything. The snow here is nearly gone,
and it looks like frost again. I have never missed a long tramp through
the slush day by day. When one is well soaked in a snow wreath, cleaned
and dried, and put beside a good fire, with bread and butter and
problems, one can eat and grind like a miller.... I have been reading a
book of poems called <i>Benoni</i>, by Arthur Munby of Trinity, which
are above the common run of such things (not <i>Lorenzo Benoni</i>,
illustrated by J. R, which I have seen but not read). Have you seen
the <i>Black Brothers</i>, a small book of Ruskin’s, illustrated by
Doyle;—a good child’s book, which big people ought to read.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From His Father.</span></p>

<p class="right"><i>18 India St., 80th January 1854.</i></p>

<p>I heartily congratulate you on your place in the list. I suppose it is
higher than the speculators would have guessed, and quite as high as
Hopkins reckoned on. I wish you success in the Smith’s Prizes; be sure
to write me the result. I will see Mrs. Morrieson, and I think I will
call on Dr. Gloag to congratulate him. He has at least three pupils
gaining honours.</p>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_136" href="#FNanchor_136" class="label">[136]</a> 
He was the younger brother of Mr. Mackenzie of
Silverknowe, who had married Isabella Wedderburn.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_137" href="#FNanchor_137" class="label">[137]</a> 
Then Tutor of Peterhouse, now Professor Emeritus of
Aberdeen.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_138" href="#FNanchor_138" class="label">[138]</a> 
Contrast with this the following entry in the
Diary:—“1842, <i>Feb.</i> 19. <i>Saturday.</i>—Go with James to
Cooke’s Circus at 2 <span class="allsmcap">P.M.</span> at York Hotel, Arena—being James’s
first time of seeing such entertainments.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_139" href="#FNanchor_139" class="label">[139]</a> 
See above, <a href="#Page_113">p. 113</a>, note.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_140" href="#FNanchor_140" class="label">[140]</a> 
“Jamsie’s dirt,” the disrespectful name for the hits of
unannealed glass, etc. etc., in the <i>Coterie-Sprache</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_141" href="#FNanchor_141" class="label">[141]</a> 
Now Rector of Smeeth, near Ashford, in Kent.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_142" href="#FNanchor_142" class="label">[142]</a> 
I did not know of this until the present year, 1881.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_143" href="#FNanchor_143" class="label">[143]</a> 
In 1852 H. M. had left Cambridge. F. M. went as a
freshman to Trinity in October 1852. See a book named <i>Early Death
not Premature</i>, being a Memoir of Francis L. Mackenzie, late of
Trinity College Cambridge. With Notices of Henry Mackenzie, B.A. By the
Rev. Charles Popham Miles, M.A., M.D., F.L.S., Glasgow. Nisbet and Co.
Fourth Edition. 1861.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_144" href="#FNanchor_144" class="label">[144]</a> 
Including the present Earl Cairns.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_145" href="#FNanchor_145" class="label">[145]</a> 
His uncle, Sir G. Clerk, is said to have had the same
peculiarity.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_146" href="#FNanchor_146" class="label">[146]</a> 
Viz. at the time of my proposed visit to Cambridge.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_147" href="#FNanchor_147" class="label">[147]</a> 
In the preceding Christmas vacation I was at a private
“séance” in Edinburgh, where Maxwell—whether he shammed or not who can
tell?—was selected by the operator (a man named Douglas, I think), who
vainly tried to make him seem to forget his name.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_148" href="#FNanchor_148" class="label">[148]</a> 
Mr. Mathison’s lecture on trigonometry.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_149" href="#FNanchor_149" class="label">[149]</a> 
<i>i.e.</i> <i>Anglicè</i>, “How did the dip agree with
it?”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_150" href="#FNanchor_150" class="label">[150]</a> 
See above, <a href="#Page_118">p. 118</a>, 1. 2.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_151" href="#FNanchor_151" class="label">[151]</a> 
According to the “contemporary Cantab,” Peterhouse and
Sidney really won the race, in spite of the removal of the bank of
weeds. The reason why Trinity got the cups was that the pistol of P.
and S.’s umpire <i>missed fire</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_152" href="#FNanchor_152" class="label">[152]</a> 
David M'Vinnie, see above, <a href="#Page_39">p. 39.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_153" href="#FNanchor_153" class="label">[153]</a> 
The late J. F. Maclennan, author of Primitive Marriage,
etc.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_154" href="#FNanchor_154" class="label">[154]</a> 
He was the first who spoke to me (about 1865) of the
principles of coloured glass, which have since become fashionable;
observing that it should be rich in sea-green, and not, “like the
banners of the Assyrian, gleaming with purple and gold.” In his
critical studies of modern poets he used to note their fondness for
particular colours,—<i>e.g.</i>, the uses of “white,” “red,” “black,”
“ruby,” “emerald,” “sapphire,” in Tennyson and Browning.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_155" href="#FNanchor_155" class="label">[155]</a> 
Professor Tait says, “He used to go up on the pollard at
the bathing-shed, throw himself <i>flat on his face</i> in the water,
dive and cross, then ascend the pollard on the other side, project
himself <i>flat on his back</i> in the water. He said it stimulated the
circulation!”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_156" href="#FNanchor_156" class="label">[156]</a> 
See <a href="#CHAPTER_VIII"><span class="allsmcap">chap. VIII</span>.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_157" href="#FNanchor_157" class="label">[157]</a> 
<a href="#Page_135">P. 135.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_158" href="#FNanchor_158" class="label">[158]</a> 
“A wise son maketh a glad father.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_159" href="#FNanchor_159" class="label">[159]</a> 
It is said that on the first occasion of his reading
in chapel after gaining his scholarship, his delivery of his first
lesson (from the Book of Job) in tones which, perhaps from nervousness,
were unusually broad, upset the gravity of every one, from the Master
downwards.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_160" href="#FNanchor_160" class="label">[160]</a> 
Above, <a href="#Page_7">p. 7</a>, note 1.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_161" href="#FNanchor_161" class="label">[161]</a> 
The Rev. F. W. Farrar, D.D., Canon of Westminster.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_162" href="#FNanchor_162" class="label">[162]</a> 
The Rev. H. Butler, D.D., Head-Master of Harrow.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_163" href="#FNanchor_163" class="label">[163]</a> 
The Rev. G. W. H. Tayler, now Vicar of Trinity Church,
Carlisle.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_164" href="#FNanchor_164" class="label">[164]</a> 
See the letter of 2d February 1853, in which his father
refers to Miss Cay’s advice that he should take wine.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_165" href="#FNanchor_165" class="label">[165]</a> 
At the same time, it is not to be supposed that Maxwell
was ever completely identified with any particular school of religious
opinion. He was too much “the heir of all the ages,” and, as he himself
expressed it, “his faith was too deep to be in bondage to any set of
opinions.” Scottish Calvinism was the theological system which had most
historical interest for him, and most claim on his hereditary piety.
He was learned in the writings of Owen and Jonathan Edwards. But that
which his latest pastor has called “his deep though simple faith,” was
not enclosed in any system. Even his youthful training (which in the
case of one so loyal is not to be disregarded) was favourable to a
comprehensive view of Christianity. Beginning with the Bible, which he
knew by heart from a child, Presbyterian and Episcopalian influence had
been blended as we have already seen. Hence, when he went to Cambridge,
there was nothing strange to him in the service of the English Church.
His mind was always moving (<i>elle planait</i>, as the French would
say), above and “beyond these voices,” yet they were not indifferent to
him.</p>

<p>It is to be regretted that a letter on the Parties in the Church
of England, written to his father in 1852, has not been found. His
general approval of Hare’s sermons, and his remarks on the Maurician
controversy, indicate the direction which his thoughts on this subject
must have taken. His interest in sermons, good and bad, was like
Macaulay’s interest in novels, or Charles Lamb’s in old plays. Years
after this, on board a friend’s yacht one Sunday, he gave a sort of
impromptu exposition of a chapter in the Book of Joshua, shouting up
his remarks from below, which struck those who heard it as full of
originality and wisdom.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_166" href="#FNanchor_166" class="label">[166]</a> 
Compare Plato, <i>Thœt.</i> 147, C D. A Cambridge
friend who knew Maxwell at a later time, says of him, “One striking
characteristic was remarked by his contemporaries at Hopkins’s
lectures. Whenever the subject admitted of it he had recourse to
diagrams, though the rest might solve the question more easily by a
train of analysis.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_167" href="#FNanchor_167" class="label">[167]</a> 
In the garden at Glenlair.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_168" href="#FNanchor_168" class="label">[168]</a> 
See above, <a href="#Page_80">p. 80.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_169" href="#FNanchor_169" class="label">[169]</a> 
<i>i.e.</i> preached.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_170" href="#FNanchor_170" class="label">[170]</a> 
This letter has been quoted above, <a href="#Page_7">p. 7</a>, note.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_171" href="#FNanchor_171" class="label">[171]</a> 
Viz. of Elizabeth M'Keand (see above, p. 47).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_172" href="#FNanchor_172" class="label">[172]</a> 
From the Diary:—“<i>1846, July, W., 29</i>.—(Day of
the prize-giving at the Edinburgh Academy). Made all ready to start
on journey to-morrow morning. At night James complained of the light
of the candle hurting his eyes. <i>Th. 30</i>.—Bad, wet day. Jas.
awoke at six; eyes weak and headache; ... seems to be a disorder from
excitement of school examinations.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_173" href="#FNanchor_173" class="label">[173]</a> 
W. Christie, Esq., advocate.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_174" href="#FNanchor_174" class="label">[174]</a> 
Bank-ground.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_175" href="#FNanchor_175" class="label">[175]</a> 
Trinity College Examination.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_176" href="#FNanchor_176" class="label">[176]</a> 
Alexander Robertson, Esq., now Sheriff of Forfarshire.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_197">[Pg 197]</span></p>

<h2 class="nobreak" id="CHAPTER_VII">CHAPTER VII.<br>
<span class="allsmcap">BACHELOR-SCHOLAR AND FELLOW OF TRINITY—1854 to 1856—<i>Æt.</i>
22-24.</span></h2>
</div>

<p class="nindc">“In the Main of Light.”</p>

<div class="sidenote2">1854.
<i>Æt.</i> 22.</div>

<p class="nind">
JAMES CLERK MAXWELL'S position as Second Wrangler and
equal Smith's Prizeman, gave deep satisfaction to his friends in
Edinburgh. Any lurking wish that he had been Senior was silenced by
the examples of William Thomson and Charles Mackenzie, as others have
been since consoled with the examples of Maxwell and Clifford. His
father was persuaded by Miss Cay to sit for his portrait to Sir John
Watson Gordon, as a gift of lasting value to his son. James was not
indifferent to these reflex aspects of his success; but the chief
interest of the moment to him undoubtedly was that he was now free to
prosecute his life-career, and to use his newly-whetted instruments in
resuming his original investigations. His leisure was not absolute,
for he took pupils as a matter of course, and the Trinity Fellowship
was only to be gained by examination. But his freedom was as great
as he himself desired, and it is a fact worthy of attention from
“researchers,” that Maxwell, with his heart fully set on physical
inquiries, engaged of<span class="pagenum" id="Page_198">[Pg 198]</span> his own accord in teaching, undertook the task
of examining Cheltenham College, and submitted to the routine which
belonged to his position at Cambridge. As a foretaste of delights in
store, he had spent the evenings of the Senate-house days in (physico-)
magnetic <i>séances</i> with his friends. But when actually emancipated
he seems to have reverted principally at first to his beloved Optics.
He makes inquiries about a microscope manufactory at Zurich; reads
Berkeley’s <i>Theory of Vision</i>—taking up Mill’s <i>Logic</i> by
the way, and finding there by no means the last word on the relation of
sense to knowledge; looks up his stock of coloured papers furnished by
D. R. Hay, and sets to work spinning and weaving the different rays;
inquires him out colour-blind persons on all sides; and invents an
instrument for inspecting the living retina, especially of dogs. By
and by it is the Art of Squinting which again has charms for him, and
he combines it with the teaching of solid and spherical geometry, by
drawing wonderful stereoscopic diagrams. So far, his investigations
oscillate between colour and form. But even the fascination of the
Colour-Top<a id="FNanchor_177" href="#Footnote_177" class="fnanchor">[177]</a> cannot<span class="pagenum" id="Page_199">[Pg 199]</span> hold him long from searching into the more
hidden things of Matter in Motion. Thus, in his letter to his father
of May 15, 1855, after describing a successful exhibition of the Top
and extemporary statement of his optical theories before the Cambridge
Philosophical Society, he adds:—“I am reading Electricity and working
at Fluid Motion.” And on May 23—“I am getting on with my electrical
calculations every now and then, and working out anything that seems
to help the understanding thereof.' Some days earlier, May 5, he had
written:—“I am working away at Electricity again, and have been
working my way into the views of heavy German writers. It takes a
long time to reduce to order all the notions one gets from these men,
but I hope to see my way through the subject, and arrive at something
intelligible in the way of a theory.” These brief notices obviously
refer to the studies which led up to his important paper on Faraday's
Lines of Force, which was put into shape in the winter of 1855-6.</p>

<p>The “vassals” were not forgotten by him even when most occupied at
Cambridge. The choice and<span class="pagenum" id="Page_200">[Pg 200]</span> provision of suitable literature for the
consumption of Sam Murdoch and Sandy Fraser is a frequent topic of
correspondence between him and his father.</p>

<p>How earnestly he now set himself to make the most of life in a
religious sense appears from a sort of aphorism on conduct which he
wrote down originally for his own use, and afterwards communicated as
a parting gift to his friend Farrar (now Canon of Westminster), who
was about to become a master at Marlborough School. As a record of the
spirit in which Maxwell entered at three-and-twenty on his independent
career, this fragment<a id="FNanchor_178" href="#Footnote_178" class="fnanchor">[178]</a> is of extraordinary value.</p>

<div class="blockquot"><div class="sidenote">1854.
<i>Æt.</i> 23.</div>

<p>He that would enjoy life and act with freedom must have the work of the
day continually before his eyes. Not yesterday’s work, lest he fall
into despair, nor to-morrow’s, lest he become a visionary,—not that
which ends with the day, which is a worldly work, nor yet that only
which remains to eternity, for by it he cannot shape his actions.</p>

<p>Happy is the man who can recognise in the work of To-day a connected
portion of the work of life, and an embodiment of the work of Eternity.
The foundations of his confidence are unchangeable, for he has been
made a partaker of Infinity. He strenuously works out his daily
enterprises, because the present is given him for a possession.</p>

<p>Thus ought Man to be an impersonation of the divine process of nature,
and to show forth the union of the infinite with the finite, not
slighting his temporal existence, remembering that in it only is
individual action possible, nor yet shutting out from his view that
which is eternal, knowing that Time is a mystery which man cannot
endure to contemplate until eternal Truth enlighten it.</p>
</div>

<p><span class="pagenum" id="Page_201">[Pg 201]</span></p>

<p>Meanwhile in his recreations he was as boyishly agile as ever, and
his feats in bathing and gymnastics, though cautiously reported by
him, somewhat alarmed his father, whose own health now showed signs of
breaking.</p>

<p>His friendships went on multiplying. To the list already given must
now be added in particular the names of Hort, V. Lushington, Pomeroy,
and Cecil Monro. And his constant observation of character was gaining
in fulness and precision. A letter to his father of 21st April
1855, besides referring to a pupil (Platt) who had gained a Trinity
scholarship, contains a graphic delineation of several of his coevals
who were going in for the first open competition for appointments in
the Indian Civil Service. He confides to his father all his thoughts
about them, in which speculative and personal interests are combined.</p>

<p>He had soon another outlet for this kind of sympathy. The children of
his uncle, Mr. R. Dundas Cay, who had lately returned from Hong-Kong,
were advancing in their education, and two of the boys, William and
Charles, showed considerable promise in mathematics. He had spent some
days with his cousins in the summer vacation of 1854 at Keswick, where
there was also a Cambridge reading party under Mathison, the tutor
of Trinity. After a joyous time with them he walked home to Galloway
from Carlisle, and it was during this walk that he thought out certain
improvements in his dynamical top. He took a continuous interest in
the progress of his cousins, and prepared a special set of problems
for<span class="pagenum" id="Page_202">[Pg 202]</span> the behoof of Willy, the eldest, who was by this time a student in
Edinburgh.</p>

<p>Maxwell continued his contributions to the “Apostle” Essay Club, and on
May 5, 1855, he read to them in his own rooms a paper on Morality, in
which he summed up the principles and tendencies of the chief existing
systems of moral philosophy, so resuming another thread of his earlier
thought.<a id="FNanchor_179" href="#Footnote_179" class="fnanchor">[179]</a></p>

<p>This essay appears to have been promised early in the year, to judge
from an allusion to the subject of it in a letter to C. J. Monro of
February 7, which may be quoted here as showing also by what home cares
his intellectual energies were interrupted or diversified. The reader
of what precedes will not be misled by the light way in which he speaks
of things which touched his heart so nearly.</p>

<div class="blockquot">

<p>I am at present superintending a course of treatment practised on my
father, for the sake of relieving certain defluxions which take place
in his bronchial tubes. These obstructions are now giving way, and the
medico, who is a skilful bellowsmender, pronounces the passages nearly
clear.</p>

<p>However, it will be a week or two before he is on his pins again, so
would you have the goodness to tell Freeman to tell Mrs. Jones to tell
those whom it may concern, that I cannot be up to time at all....
I may be up in time to keep the term, and so work off a streak of
Mathematics, which I begin to yearn after. At present I confine myself
to Lucky Nightingale’s fine of business, except-that I have been
writing descriptions of Platometers for measuring plane figures, and
privately by letter confuting rash mechanics, who intrude into things
they have not got up, and suppose that their devices will act when
they can’t. I hope that<span class="pagenum" id="Page_203">[Pg 203]</span> my absence will not delay the assumption of
W. D. Maclagan.<a id="FNanchor_180" href="#Footnote_180" class="fnanchor">[180]</a> He has been here all the vacation, if not there
and everywhere. The foundation of Ethics, though it may have tickled
my core, has not germinated at my vertex. Whether it will yet be laid
bare, either as a paradox or a truism, is more than I can tell. Perhaps
it may be a pun....</p>

<p>I have now to do a little cooking and buttling, in the shape of toast
and beef-tea and everfizzing draught.... Does Pomeroy flourish, and has
he Crimean letters still?</p>
</div>

<p>It was only because his father insisted on his doing so that he
returned to Cambridge at all at this time.</p>

<div class="sidenote2"><i>Æt.</i> 24.</div>

<p>At the meeting of the British Association, held at Glasgow in September
1855, Maxwell was present when Brewster made an attack on Whewell’s
optical theories, but he followed the example of the Master of Trinity,
who was present, in saying nothing. He exhibited his Colour-Top,
however, the same afternoon, by appointment, at Professor Ramsay’s
house, where Brewster had been expected, but did not appear. Maxwell
at the same time renewed his intercourse with Dr. George Wilson, the
Edinburgh Professor of Technology, whose likeness hung beside that
of Forbes in his rooms at Trinity. Wilson brought out immediately
afterwards a little book on Colour Blindness, in which the substance of
his conversations with Maxwell is recorded.</p>

<div class="sidenote2">1855.
<i>Æt.</i> 24.</div>

<p>In October he gained his fellowship at Trinity. It was his second
trial, and his name appeared as one<span class="pagenum" id="Page_204">[Pg 204]</span> of three mathematicians who had
been chosen from the bachelors of the second year.</p>

<p>He was at once appointed to lecture to the Upper Division of the third
year in Hydrostatics and Optics, and, to reserve time for his own
studies, he now desisted from taking private pupils. He had indeed
enough to occupy him without burdening himself with them. Besides the
lecture in hydrostatics and optics, for which he found it desirable
to read beforehand “so as not to tell lies,” he had a large share in
“exercising the questionists,” <i>i.e.</i> preparing pass-men for the
final examination, by setting papers in arithmetic, algebra, etc., and
looking them over with the writers individually.</p>

<p>He had also been asked to prepare a text-book<a id="FNanchor_181" href="#Footnote_181" class="fnanchor">[181]</a> on optics, and made
some plans for doing so, having previously resisted the solicitation
of his friend Monro, who had urged upon him the task of “translating
Newton.” And it is a fact worthy of the attention of bachelor fellows,
that young Clerk Maxwell thought it worth while to attend the lectures
of the Professor of Mechanics<a id="FNanchor_182" href="#Footnote_182" class="fnanchor">[182]</a> and to exchange ideas with him.</p>

<p>For Electricity and Magnetism he took out Poisson again, and presently
began putting together more systematically his own ideas on Faraday's
<i>Lines of Force</i>.</p>

<p>His interest in coevals and juniors, which even in his undergraduate
days was often like that of an<span class="pagenum" id="Page_205">[Pg 205]</span> elder brother, assumed a deeper and
more authoritative cast. He read more widely than ever, and nothing,
from the latest novel to the newest metaphysical system, escaped
his penetrating mind. He never read without criticising, and his
criticisms, often quaintly expressed, were always worth attending to.
“I hope that analysis of Hegel has done the writer good,” “Comte has
good ideas about method, but no notion of what is meant by a person,”
“Some people keep water-tight compartments in their minds.” Such were
the sparks that flew about. Other examples, not less striking, will be
found in the letters. His observation of social phenomena also took
a new departure, and his remarks on life and manners were endlessly
entertaining.</p>

<p>He was elected a member of the Ray Club, which he had attended as
a visitor in the spring, and did not forsake the assembling of the
“Apostles,” as appears from at least two essays which can only be
referred to this period. He also took an active interest in the scheme
for the higher education of working men, which had been lately set on
foot by Mr. Maurice.</p>

<p>Between whiles he found time for a full course of classical English
reading. And as all that he read he read critically, and had it
thereafter in perfect possession, his literary acquirements were by
this time of no mean order. He was, at the same time, careful to
maintain himself in proper physical condition, by a steady course of
exercises at the new gymnasium, which proved a welcome refuge in the
wet November of that year. It was an unhealthy season, and to<span class="pagenum" id="Page_206">[Pg 206]</span> all his
other employments was now added that of helping to nurse his friend
Pomeroy, who was struck down with bilious fever.</p>

<p>His many-sided nature was in full activity. It is most characteristic
of him that at this important crisis of his intellectual life, the
best hour of day after day was given ungrudgingly to the task of
literally making a friend's bed in his sickness. A lighter trait of
the same kind may be found in the fact that, in the midst of the
fellowship examination, he had given his father detailed advice about
the “vassals’” reading:—“When Sam Murdoch has finished <i>Arabia</i>,
there are the volumes of the Cabinet Library, called <i>Drake,
Cavendish, and Dampier, and Circumnavigation of the Globe</i>,
Humboldt's <i>Travels and Polar Regions</i>, but it would be better to
change and try the third volume of <i>Household Words</i>.”</p>

<p>His thoughts turned homewards the more often, because his father’s
health was now becoming a matter for grave anxiety. In going up to
Trinity for the fellowship trials, he had been doubtful whether in any
case it would be right for him to stay up for the rest of the term.
And, although this question was decided in the affirmative, every
letter home bears some trace of his unceasing solicitude.</p>

<p>Thus, at the close of a period of manifold brightness, there was some
foreshadowing of darker days shortly to come, when Death would take
his father from him, and make the first breach in the circle of his
friends.</p>

<p><span class="pagenum" id="Page_207">[Pg 207]</span></p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1854 to 1856.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>India Street, 4th Feby. 1854.</i></p>

<p>I have got yours of the 1st inst., and to-night or on Monday I will
expect to hear of the Smith’s Prizes. I get congratulations on all
hands, including Prof. Kelland and Sandy Fraser, and all others
competent.</p>


<p class="right"><i>18 India St., 6 th Feby. 1854.</i></p>

<p>George Wedderburn came into my room at 2 <span class="allsmcap">A.M.</span> yesterday
morning, having seen the Saturday <i>Times</i>, received by the express
train, and I got your letter before breakfast yesterday. As you are
equal to the Senior in the champion trial, you are but a very little
behind him.</p>

<p>I am going to dine with John Cay, and with him proceed to the Royal
Society. I may perhaps catch Prof. Gregory about the microscopist.</p>


<p class="right"><i>5th March 1854.</i></p>

<p>Mrs. Morrieson told me she had a poetical epistle from you on St.
David’s Day.<a id="FNanchor_183" href="#Footnote_183" class="fnanchor">[183]</a></p>

<p>Aunt Jane stirred me up to sit for my picture, as she said you wished
for it and were entitled to ask for it, quâ wrangler. I have had four
sittings to Sir John Watson Gordon, and it is now far advanced; I
think it is very like. It is Kit-cat size, to be a companion to Dyce’s
picture of your mother and self, which Aunt Jane says she is to leave
to you.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To E. B. Litchfield, Esq.</span></p>

<p class="right"><i>Trin. Coll., 25th March 1854.</i></p>

<p>I am experiencing the effects of Mill, but I take him slowly. I do
not think him the last of his kind. I think more is wanted to bring
the connexion of sensation with Science to light, and show what it
is not. I have been reading Berkeley on the <i>Theory of Vision</i>,
and greatly admire it, as I do all his other non-mathematical works;<span class="pagenum" id="Page_208">[Pg 208]</span>
but I was disappointed to find that he had at last fallen into the
snare of his own paradoxes, and thought that his discoveries with
regard to the senses and their objects would show some fallacy in
those branches of high mathematics which he disliked. It is curious
to see how speculators are led by their neglect of exact sciences to
put themselves in opposition to them where they have not the slightest
point of contact with their systems. In the Minute Philosopher there
is some very bad Political Economy and much very good thinking on more
interesting subjects. Paradox is still sought for and exaggerated. We
live in an age of wonder still.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Trin. Coll., Whitsun. Eve, 1854.</i></p>

<p>I am in great luxury here, having but 2 pups., and able to read the
rest of the day, so I have made a big hole in some subjects I wish to
know. We have hot weather now, and I am just come from a meeting of
subscribers to the Bathing Shed, which we organised into a Swimming
Club so as to make it a more sociable affair, instead of mere “pay your
money and use your key.”</p>

<p>A nightingale has taken up his quarters just outside my window, and
works away every night. He is at it very fierce now. At night the owls
relieve him, softly sighing after their fashion.</p>

<p>I have made an instrument for seeing into the eye through the pupil.
The difficulty is to throw the light in at that small hole and look
in at the same time; but that difficulty is overcome, and I can see
a large part of the back of the eye quite distinctly with the image
of the candle on it. People find no inconvenience in being examined,
and I have got dogs to sit quite still and keep their eyes steady.
Dogs’ eyes are very beautiful behind, a copper-coloured ground, with
glorious bright patches and networks of blue, yellow, and green, with
blood-vessels great and small.</p>


<p class="right"><i>Trin. Coll., 21th Novr. /54.</i></p>

<p>I have been very busy of late with various things, and<span class="pagenum" id="Page_209">[Pg 209]</span> am just
beginning to make papers for the examination at Cheltenham, which I
have to conduct about the 11th of December. I have also to make papers
to polish off my pups. with I have been spinning colours a great deal,
and have got most accurate results, proving that ordinary peoples' eyes
are all made alike, though some are better than others, and that other
people see two colours instead of three; but all those who do so agree
amongst themselves. I have made a triangle of colours by which you may
make out everything.</p>
</div>

<figure class="figright width500" id="i_247" style="width: 300px;">
<img src="images/i_247.jpg" width="300" height="133" alt="A geometric
diagram showing two points labeled D on the left connected by long
lines to a cluster of points labeled B, K, W, G, and Y on the right,
forming a complex polyhedron-like network of intersecting lines.">
</figure>

<div class="blockquot">

<p>You see that W lies outside the triangle B, R, Y, so that White can't
be made with Blue, Red, and Yellow; but if you mix blue and yellow you
don’t get green, but pink—a colour between W and R. Those who see two
colours only distinguish blue and yellow, but not red and green: for
instance—</p>

<p>6 of blue and 94 of red make a red which looks to them like a gray made
of 10 W and 90 Black.</p>

<p>40 of blue and 60 of green make 34 of W and 66 Black.</p>

<p>I should like you to find out if the Normans have got Bishop Percy’s
<i>Reliques of Ancient Ballad Poetry</i>, for if they have I would not
send them a duplicate; if not I think the book would suit one-half of
that family.</p>

<p>If you can find out any people in Edinburgh who do not see colours
(I know the Dicksons don’t), pray drop a hint that I would like to
see them. I have put one here up to a dodge by which he distinguishes
colours without fail. I have also constructed a pair of squinting
spectacles, and am beginning operations on a squinting man.</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>18 India Street, Edinburgh, 19th Feb. /55.</i></p>

<p>My steps will be no more by the reedy and crooked<span class="pagenum" id="Page_210">[Pg 210]</span> till Easter term.
My father’s recovery is retarded by the frosty weather, though we have
got up an etherial mildness here by means of a good fire and a towel
hung up wet at the other end of the room, together with an internal
<i>exhibition</i> of nitric ether.</p>

<p>I wrote to Mackenzie about putting a respectable man in my rooms as a
stopper to Cat’s Hall men, Manns and Boy Joneses, but I have not heard
of his success. I have no time at present for anything except looking
through novels, etc., and finding passages which will not offend my
father to read to him. He strongly objects to new-fangled books,
and knows the old by heart. But he likes the <i>Essays in Intervals
of Business</i>, cause why, they have not too many words. The frost
here has lasted long, and I am beginning to make use of it. I get an
uncle to take my place in the afternoon, and I rush off to Lochend or
Duddingston. I have not yet succeeded in skating on one foot for an
indefinite time and getting up speed by rising and sinking at the bends
of the path; but I attribute my failure to want of faith, for I can get
up speed for a single bend, only I always slip at a certain critical
turning. However, I have only been 3 days, and I may do it yet. My
plans are not fixt, but I think it will be some while before my father
is on his pins again, and when he is I intend to look after him still,
but do a private streak of work, for I will soon be in a too much
bottled up condition of mathematics, from which even mental collapse
would be a relief. I have no intention of doing a Newton or any elegant
mathematics. I have a few thoughts on top-spinning and sensation
generally, and a kind of dim outline of Cambridge palavers, tending
to shadow forth the influence of mathematical training on opinion and
speculation.</p>

<p>I suppose when my father can move I will see him out of this eastern
clime and safe located in Gallovidian westnesses, and so be up in Cam.
before the beginning of next term.</p>

<p>I should like to know how many kept baccalaurean weeks go to each of
these terms, and when they begin and end. Overhaul the calendar, and
when found make note of.</p>
</div>

<p><span class="pagenum" id="Page_211">[Pg 211]</span></p>

<div class="blockquot">

<p>Is Pomeroy up, or where This is the 2nd time of asking.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., Saturday, 21st April 1855.</i><br>
[Date in John C. M.’s hand.]</p>

<p>Lots of men are going in for the H.E.I.C.S. examination,—Pomeroy, B.,
C., D. (the best double degree for many years), E. (Senior Wrangler),
etc., so I suppose the competition will be pretty active; but it is
evident that these men will be totally different judges, etc., tho’
they may be all good in examination subjects.</p>

<p>Pomeroy is a genial giant, generous and strong, but hasty in
condemnation tho’ slow to wrath. B., intelligent and able to detect
any humbug but his own; but excitable, and impudent in the extreme to
people he does not know. C. has strong feelings and affections, with a
great amount of sympathy for all cases, but it is repressed for want
of courage, and he is left with somewhat of a sneaking virtue of his
own, always trying to put on the manners which suit those he is with.
D. is a good man of business, using up every scrap of his time most
successfully, and honest, I believe. E. is what I don’t know, but I can
conceive him reduced by circumstances to act the part of Sir Elijah
Impey in India; but I hope circumstances may be different, and then he
may be a harmless mathematician or scientific referee, and leave a high
reputation behind him.</p>


<p class="right"><i>Trin. Coll., Vesp. SS. Philipp. &amp; S. Jac. 1855.</i></p>

<p>I have been working at the motion of fluids, and have got out some
results. I am going to show the colour trick at the Philosophical on
Monday. Routh has been writing a book about Newton in conjunction with
Lord Brougham. Stokes is back again and lecturing as usual.</p>


<p class="right"><i>Saturday, 5th May 1855.</i></p>

<p>The Royal Society have been very considerate in sending me my paper on
colours just when I wanted it for the<span class="pagenum" id="Page_212">[Pg 212]</span> Philosophical here. I am to let
them see the tricks on Monday evening, and I have been there preparing
their experiments in the gaslight. There is to be a meeting in my rooms
to-night to discuss Adam Smith’s “Theory of Moral Sentiments,” so I
must clear up my litter presently. I am working away at electricity
again, and have been working my way into the views of heavy German
writers. It takes a long time to reduce to order all the notions one
gets from these men, but I hope to see my way through the subject and
arrive at something intelligible in the way of a theory.</p>


<p class="right"><i>Trin. Coll., 15th May 1855.</i></p>

<p>The colour trick came off on Monday, 7th. I had the proof sheets of
my paper, and was going to read; but I changed my mind and talked
instead, which was more to the purpose. There were sundry men who
thought that Blue and Yellow make Green, so I had to undeceive them. I
have got Hay’s book of colours out of the Univ. Library, and am working
through the specimens, matching them with the top. I have a new trick
of stretching the string horizontally above the top, so as to touch
the upper part of the axis. The motion of the axis sets the string
a-vibrating in the same time with the revolutions of the top, and the
colours are seen in the haze produced by the vibration. Thomson has
been spinning the top, and he finds my diagram of colours agrees with
his experiments, but he doubts about browns what is their composition.
I have got colcothar brown, and can make white with it, and blue and
green; also, by mixing red with a little blue and green and a great
deal of black, I can match colcothar exactly.</p>

<p>I have been perfecting my instrument for looking into the eye. Ware has
a little beast like old Ask,<a id="FNanchor_184" href="#Footnote_184" class="fnanchor">[184]</a> which sits quite steady and seems to
like being looked at, and I have got several men who have large pupils
and do not wish to let me look in. I have seen the image of the candle
distinctly in all the eyes I have tried, and the veins of the<span class="pagenum" id="Page_213">[Pg 213]</span> retina
were visible in some; but the dogs’ eyes showed all the ramifications
of veins, with glorious blue and green network, so that you might copy
down everything. I have shown lots of men the image in my own eye by
shutting off the light till the pupil dilated and then letting it on.</p>

<p>I am reading Electricity and working at Fluid Motion, and have got out
the condition of a fluid being able to flow the same way for a length
of time and not wriggle about.</p>
</div>

<div class="blockquot">

<p class="right"><i>Trin. Coll., Eve. of H. M. Nativity.</i></p>

<p>Wednesday last I went with Hort and Elphinstone to the Ray Club, which
met at Kingsley of Sidney’s rooms. Kingsley is great in photography and
microscopes, and showed photographs of infusoria, very beautiful, also
live plants and animals, with oxy-hydrogen microscope.</p>

<p>... I am getting on with my electrical calculations now and then, and
working out anything that seems to help the understanding thereof.</p>


<p class="nindc"><span class="allsmcap">From his Father,</span></p>

<p class="right"><i>Glenlair, 21st May 1855.</i></p>

<p>Have you put a burn in fit condition to flow evenly, and not beat
on its banks from side to side? That would be the useful practical
application.</p>


<p class="nindc"><span class="allsmcap">From Professor J. D. Forbes.</span></p>

<p class="right"><i>Clifton, Bristol, 4th May 1855.</i></p>

<p>I left directions with Messrs. Neill &amp; Co. to forward proofs of your
paper, by inquiring at 18 India Street, and I understand that they were
sent out on the 1st May.</p>

<p>I am informed that my note to you about some of my experiments on
colour has been printed in the <i>Edinburgh Philosophical Journal</i>.
This was by no means what I intended.... What I thought that you might
do was to introduce into that part of your paper where you speak of
what has been done or written on the subject, mention of the fact
that as early as January 18— (I do not at the moment recollect<span class="pagenum" id="Page_214">[Pg 214]</span>
the year I stated to you) I had used the method of rapid motion
in blending colours; that I had endeavoured to obtain an equation
between certain mixed colours and pure gray; and that I had pointed
out before Helmholtz, or I believe any one else, that a mixture of
yellow and blue, under these circumstances at least, does not produce
green; you yourself being a witness to what I then tried, though I was
prevented from resuming the subject by ill health and some experimental
occupations (conduction of heat) which I considered more imperative.</p>

<p>I hope you will continue to prosecute your interesting inquiries, and
with an equal measure of success.</p>

<p>I address this to Cambridge, as I think you said you should be there
this month.</p>


<p class="nindc"><span class="allsmcap">From the Same.</span></p>

<p class="right"><i>Clifton, Bristol, 16th May 1855.</i></p>

<p>I am much obliged by your note mentioning your intention of referring
to my experiments.</p>

<p>You inquire how I altered the proportions of the constituent colours.
My plan was, in fact, the same as yours. I had sectors much larger than
I required of each colour, making them overlap, and fixing them down
by a screw at the centre, pressing a disc of indiarubber on the discs.
When I got the anomalous result of blue and yellow, I got Mr. Hay to
make a disc of <i>many</i> alternating narrow sectors merely to see
whether it might be a physiological effect from the imperfect blending
of the colours.</p>

<p>I still think the experiment ought to be tried <i>without motion</i>,
by winding blue and yellow threads of silk or worsted round a card and
looking at it at a good distance, or (as you proposed) by viewing it
with a telescope out of focus.</p>

<p>You will recollect that I had a whirling-machine (made on purpose), in
which a number of discs revolved simultaneously with equal velocities.
I used black and white on one of these; colours on another. Your
teetotum, combining both, I consider preferable for experiments. By
the<span class="pagenum" id="Page_215">[Pg 215]</span> way, I did not get the teetotum you were to leave for me.</p>

<p><i>P.S.</i>—I hope you have got the proof of the plate as well as of
the paper. If not, write to Messrs. Johnston, engravers, 4 St. Andrew
Square, Edinburgh.</p>


<p class="nindc"><span class="allsmcap">To E. B. Litchfield, Esq.</span></p>

<p class="right"><i>Trin. Coll., 6th June 1855.</i></p>

<p>It is hard work grinding out “appropriate ideas,” as Whewell calls
them. However, I think they are coming out at last, and by dint of
knocking them against all the facts and ½-digested theories afloat, I
hope to bring them to shape, after which I hope to understand something
more about inductive philosophy than I do at present.</p>

<p>I have a project of sifting the theory of light and making everything
stand upon definite experiments and definite assumptions, so that
things may not be supposed to be assumptions when they are either
definitions or experiments.</p>

<p>I have been looking into all the dogs’ eyes here to see the bright
coating at the back of the eye, thro’ an instrument I made to that end.
The spectacle is very fine. I remember the appearance of Mungo’s eyes
at Cheltenham. He would be the dog to sit. Human eyes are very dark and
brown as to their retina, but you can see the image of a candle quite
well on it, and sometimes the blood-vessels, etc.</p>


<p class="nindc"><span class="allsmcap">From William Dyce Cay, Esq., to John C. M.</span></p>

<p class="nindc">(<i>Glasgow, at the Meeting of the British Association</i>).</p>

<p class="right"><i>18th September 1855.</i></p>

<p>Sir David Brewster was upon the triple spectrum. As far as I can
understand, he believes the spectrum to be composed of three
colours—red, blue, and yellow; and that the intermediate colours
are composed of mixtures of these, as, for example, the green from a
mixture of blue and yellow, which, I think, is different from what
James believes.<span class="pagenum" id="Page_216">[Pg 216]</span> James did not say anything in the controversy which
followed his speech, as he was to meet Sir D. Brewster at the Ramsays’
afterwards, where he would have his top and other apparatus to show him.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="nindc">(<i>After the Meeting of the British Association at Glasgow</i>).</p>

<p class="right"><i>Holbrooke, by Derby, 2th Sept. 1855.</i></p>

<p>We had a paper from Brewster on the theory of three colours in
the spectrum, in which he treated Whewell with philosophic pity,
commending him to the care of Prof. Wartman of Geneva, who was
considered the greatest authority in cases of his kind, cases in
fact of colour-blindness. Whewell was in the room, but went out, and
avoided the quarrel; and Stokes made a few remarks, stating the case
not only clearly but courteously. However, Brewster did not seem
to see that Stokes admitted his experiments to be correct, and the
newspapers represented Stokes as calling in question the accuracy of
the experiments.</p>

<p>I am getting my electrical mathematics into shape, and I see through
some parts which were rather hazy before; but I do not find very much
time for it at present, because I am reading about heat and fluids, so
as not to tell lies in my lectures. I got a note from the Society of
Arts about the platometer, awarding thanks, and offering to defray the
expenses to the extent of £10, on the machine being produced in working
order. When I have arranged it in my head, I intend to write to James
Bryson about it.</p>

<p>I got a long letter from Thomson about colours and electricity. He is
beginning to believe in my theory about all colours being capable of
reference to three standard ones, and he is very glad that I should
poach on his electrical preserves.</p>

<p class="right"><i>Trin. Coll, 27th Sept. 1855.</i></p>

<p>... It is difficult to keep up one’s interest in intellectual matters
when friends of the intellectual kind are<span class="pagenum" id="Page_217">[Pg 217]</span> scarce.<a id="FNanchor_185" href="#Footnote_185" class="fnanchor">[185]</a> However, there
are plenty friends not intellectual, who serve to bring out the active
and practical habits of mind, which overly-intellectual people seldom
do. Wherefore, if I am to be up this term, I intend to addict myself
rather to the working men who are getting up classes, than to pups.,
who are in the main a vexation. Meanwhile there is the examination<a id="FNanchor_186" href="#Footnote_186" class="fnanchor">[186]</a>
to consider.</p>
</div>

<div class="blockquot">

<p class="right"><i>Trin. Coll., 5th October 1855.</i></p>

<p>You say Dr. Wilson has sent his book. I will write and thank him. I
suppose it is about colour-blindness. I intend to begin Poisson’s
papers on electricity and magnetism to-morrow. I have got them out of
the library; my reading hitherto has been of novels,—<i>Shirley</i>
and <i>The Newcomes</i>, and now <i>Westward Ho</i>.</p>


<p class="right"><i>Trin. Coll., 10th October 1855.</i></p>

<p>Macmillan proposes to get up a book of optics, with my assistance,
and I feel inclined for the job. There is great bother in making a
mathematical book, especially on a subject with which you are familiar,
for in correcting it you do as you would to pups.—look if the
principle and result is right, and forget to look out for small errors
in the course of the work. However, I expect the work will be salutary,
as involving hard work, and in the end much abuse from coaches and
students, and certainly no vain fame, except in Macmillan’s puffs. But,
if I have rightly conceived the plan of an educational book on optics,
it will be very different in manner, though not in matter, from those
now used.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 10th October 1855.</i></p>

<p>The book sent by Dr. Wilson is the full edition about colour-blindness,
with notes and appendices, containing your letter to him and notices of
your communications to him on the subject.</p>
</div>

<p><span class="pagenum" id="Page_218">[Pg 218]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Trin. Coll., 17th October 1855.</i></p>

<p>I expect to be grinding this term. There are lectures on hydrostatics
and optics, papers for questionists to be set and read over with the
men, which is procrastinations. Besides this I may have to lecture the
working men, and what spare time I have I intend to use on various
subjects, which will keep me in work for some time to come, so I do
not require any pupils to keep my hand in this term. I was looking
for Jowett’s book in the library, but, as usual, all the new theology
had been carried off in a lump by the M.A.’s, who get in the first
day. I wanted Ellicott, but he was out too, so I took Carlyle on the
French Revolution. I have been reading the English language, comprising
Chaucer, Sir Tristram, Bacon F., Pope, Berkeley, Goldsmith, Cowper,
Burns’ letters, Isaac Taylor’s <i>Saturday Night</i>, Carlyle, Ruskin,
Kingsley, Maurice, and combining the whole with Trench on <i>English
Past and Present</i>, and with all this I derive pleasure and
information, but not a single glimmer of a theory about Words.</p>

<p>And yet I have presently to state whether words mould thought or
thought brews words. Is not one theory as good as another? Faith and
a dale better too, if it was not for the sake of laying them together
by the ears, which is a difficult task when you have to catch both
yourself.</p>

<p>I was staying at the Blackburns’ when I was at Glasgow, but they were
away, and the Ramsays fed and tended me. I found your photograph there,
together with a few other pleasant recollections. I have been over to
H. M. Butler, who is come up again. We were talking about Maurice,
etc. Maurice is a man I am loath to say nay to, or to accuse of wilful
perversion of facts; but in some matters I think he is in great error,
especially in his estimate of respectable ordinary Christians, as far
as regards their creed. He cannot go too far in enforcing practice and
work on people who were bound to it beforehand theoretically confess
it, but he is too hard upon the theories, and totally misrepresents<span class="pagenum" id="Page_219">[Pg 219]</span>
them. I would rather be taken for a Yezide than for one of Maurice’s
popular religionists.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 17th October 1855.</i></p>

<p>The lectures were settled last Friday. I am to do the upper division
of the third year in hydrostatics and optics, and I have most of the
exercising of the questionists.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>Glenlair, 20th October 1855.</i></p>

<p>If you do a book for M'Millan on optics, do not let him hurry it on.
Take full time to yourself to revise and re-revise the MS., and let
anything published be creditable. Do nothing in a careless manner, and
so get a bad name. A first work especially should be very carefully got
up.</p>

<p>When you are set to lecture on hydrostatics and optics, have you any
apparatus for illustration?</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 25th October 1855.</i></p>

<p>I have refused to take pupils this term, as I want to get some time for
reading and doing private mathematics, and then I can bestow some time
on the men who attend lectures.</p>

<p>I go in bad weather to an institution just opened for sports of all
sorts—jumping, vaulting, etc. By a little exercise of the arms every
day, one comes to enjoy one’s breath, and to sleep much better than if
one did nothing but walk on level roads.</p>


<p class="right"><i>1st November 1855.</i></p>

<p>I have been lecturing two weeks now, and the class seems improving, and
they come up and ask questions, which is a good sign.</p>

<p>I have been making curves to show the relations of pressure and volume
in gases, and they make the subject easier. I think I told you about
the Ray Club. I was<span class="pagenum" id="Page_220">[Pg 220]</span> elected an associate last Wednesday.... We had a
discussion and an essay by Pomeroy last Saturday about the position
of the British nation in India, and sought through ancient and modern
history for instances of such a relation between two nations, but found
none. We seem to be in the position of having undertaken the management
of India at the most critical period, when all the old institutions
and religions must break up, and yet it is by no means plain how new
civilisation and self-government among people so different from us is
to be introduced. One thing is clear, that if we neglect them, or turn
them adrift again, or simply make money of them, then we must look
to Spain and the Americans for our examples of wicked management and
consequent ruin.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>11th November 1855.</i></p>

<p>The platometer will require much consideration, both by you and by any
one that undertakes the making. You need hardly expect the details all
rightly planned at the first; many defects will occur, and new devices
contrived to conquer unforeseen difficulties in the execution. I would
suspect £10 would not go far to get it into anything like good working
order. If the instrument were made, to whom is it to belong? And if it
succeeds well, for whose profit is all to be contrived? Does Bryson so
understand it as to be able to make it? Could he estimate the cost, or
would he contract to get an instrument up? Fixing on a suitable size is
very important.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 12th November 1855.</i></p>

<p>I attended Willis on Mechanism to-day, and I think I will attend his
course, which is about the parts of machinery. I was lecturing about
the velocity of water escaping from a hole this morning. There was a
great noise outside, and we looked out at a magnificent jet from a pipe
which had gone wrong in the court. So that I was saved the trouble of
making experiments.</p>
</div>

<p><span class="pagenum" id="Page_221">[Pg 221]</span></p>

<div class="blockquot">

<p>I was talking to Willis about the platometer, and he thinks it will
work. Instead of toothed wheels to keep the spheres in position always,
I think watch-spring bands would be better.</p>


<p class="right"><i>Trin. Coll., 25th November 1855.</i></p>

<p>I think I told you that Pomeroy was ill. He has had rather a sharp
attack of bilious fever. His mother has come up. He was getting round
on Thursday, but he saw too many people, and was rather the worse
of it. However, the doctor says that the recovery simply requires
attention, and patience, and no hurrying.</p>

<p>I have been reading old books of optics, and find many things in them
far better than what is new. The foreign mathematicians are discovering
for themselves methods which were well known at Cambridge in 1720, but
are now forgotten.</p>

<p>I have got a contrivance made for expounding instruments. It is a
squared rod, one yard long, on which slide pieces, which will carry
lenses. Each piece has a wedge which fixes it tight on the rod, and a
saw-shaft, with holes through it, for fastening the pasteboard frame of
the lens. By means of this I intend to set up all kinds of models of
instruments.</p>


<p class="nindc"><span class="allsmcap">To R. B. Litchfield, Esq.</span></p>

<p class="right"><i>Trin. Coll., 28th November 1855.</i></p>

<p>I am busy with questionists pretty regularly just now, slanging them
one after another for the same things. As they have just set upon me
for the evening, I must stop now and get out some optical things to
show them.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 3d December 1855.</i></p>

<p>I had four questionist papers last week, as my subjects come thick
there; so I am full of men looking over papers. I have also to get
ready a paper on Faraday’s Lines of Force for next Monday.</p>
</div>

<p><span class="pagenum" id="Page_222">[Pg 222]</span></p>

<div class="blockquot">

<p>Pomeroy is still very ill, but to-day he feels easier, and his mouth is
not quite so dry and sore. He gets food every two or three hours, and
port wine every time. I go up in the morning and look after the getting
up and bed-making department along with the nurse, after which Mrs.
Pomeroy comes, and the nurse goes to bed.</p>

<p>Maurice was here from Friday to Monday, inspecting the working men’s
education. He was at Goodwin’s on Friday night, where we met him and
the teachers of the Cambridge affair. He talked of the history of the
foundation of the old colleges, and how they were mostly intended to
counteract the monastic system, and allow of work and study without
retirement from the world.</p>


<p class="right"><i>Trin. Coll., 11th December.</i></p>

<p>Last night I lectured on Lines of Force at the Philosophical. I put off
the second part of it to next term. I have been drawing a lot of lines
of force by an easy dodge. I have got to draw them accurately without
calculation.</p>

<p>Pomeroy has been improving slowly, but sometimes stopping. He is so big
that it requires a great deal to get up his strength again. I saw Dr.
Paget at the Philosophical to-day, and he seemed to think him in a fair
way to recover.</p>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_177" href="#FNanchor_177" class="label">[177]</a> 
The “colour-box,” though perfected only in 1862, was in
full operation in the study at Glenlair several years before this—I
think as early as 1850. And even then he had begun spinning coloured
discs, proportionately arranged, so as to ascertain the true “mixture
of colours.” He was fond of insisting, to his female cousins, aunts,
etc., on the truth that blue and yellow do not make green. I remember
his explaining to me the difference between pigments and colours, and
showing me, through the “colour-box,” that the central band in the
spectrum was different from any of the hitherto so-called “primary
colours.” His theory on this subject was gradually formed through an
immense number of ingeniously arranged observations.</p>

<p>His interest in Faraday’s investigations must have dated from a very
early time, certainly before 1849. And now he sought to give to these
speculations, at which his imaginative mind had long been working,
precise mathematical expression. I wish I could recall the date (1857?)
of a drive down the Vale of Orr, during which he described to me for
the first time, with extraordinary volubility, the swift, invisible
motions by which magnetic and galvanic phenomena were to be accounted
for. It was like listening to a fairy-tale. For the substance of it see
his papers in the <i>Philosophical Magazine</i> for 1861-2.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_178" href="#FNanchor_178" class="label">[178]</a> 
An autograph copy was found amongst his papers. Another
copy, together with the interesting fact mentioned above, determining
the date, has been supplied by Canon Farrar’s kindness.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_179" href="#FNanchor_179" class="label">[179]</a> 
<i>Supra</i>, <a href="#Page_114">p. 114.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_180" href="#FNanchor_180" class="label">[180]</a> 
Now Bishop of Lichfield. Maxwell had recommended him for
co-optation by the “Apostles’” Club.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_181" href="#FNanchor_181" class="label">[181]</a> 
The MS. of a considerable part of this hook is still
extant. There appears to have been sometimes a contest in his mind
between the claims of different subjects. “I will have nothing to do
with optics,” he was heard once to exclaim.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_182" href="#FNanchor_182" class="label">[182]</a> 
Professor Willis.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_183" href="#FNanchor_183" class="label">[183]</a> 
Mrs. Morrieson’s early home was in Montgomeryshire.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_184" href="#FNanchor_184" class="label">[184]</a> 
Above, <a href="#Page_57">p. 57.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_185" href="#FNanchor_185" class="label">[185]</a> 
This is said <i>à propos</i> of a recent visit to a
college friend who was settled as a clergyman in the country.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_186" href="#FNanchor_186" class="label">[186]</a> 
For the Trinity College Fellowship.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_223">[Pg 223]</span></p>

<h2 class="nobreak" id="CHAPTER_VIII">CHAPTER VIII.<br>
<span class="allsmcap">ESSAYS AT CAMBRIDGE—1853 TO 1856.</span></h2>
</div>

<p class="nind">
THE description of Maxwell’s life at Cambridge would be
incomplete without some notice of the Essays written by him from time
to time for the “Apostles’”</p>

<p>Club. These range from the spring of 1853 to the summer of 1856.
Thrown off, as such things are, in irresponsible gaiety of heart,
mere “gardens of Adonis,” as Plato would call them, they contain real
indications of the writer’s speculative tendencies, and are most
characteristic of the activity and fulness of his mind, of his ironical
humour, and of his provoking discursiveness and indirectness of
expression. He is not “upon his oath,” and often throws out tentatively
a whole train of arguments or ideas.</p>

<div class="blockquot">

<p class="nindc space-above2">
1. “<i>Decision</i>.” Written in February 1853.</p>

<div class="sidenote2"><i>Æt.</i> 21.</div>

<p>After a humorous sketch of the distraction arising from the different
associations of term and vacation time, the question is raised whether
on the whole a learned education is unfavourable to decision of
character and opinion. The answer pointed at, though not distinctly
given, is that high education may often unsettle opinion, but ought to
strengthen character. It must suffice here to quote a few of the most
characteristic passages:—</p>

<p>“... In this charitable (holiday) frame of mind, we<span class="pagenum" id="Page_224">[Pg 224]</span> resolved to try
the effect of our learning upon a mixed company.</p>

<p>“Not to dazzle them too much at first, we merely ventured to quote
to an elderly lady a passage from Griffin on Presbyopic Vision. She
intended to get a new pair of spectacles, and hoped that optical
advice, fresh from College, might assist her in her choice. She was
surprised to learn that she must ascertain the distance behind the
retina at which the image of a distant object is formed, and that she
might then determine from the proper formula the focal lengths of the
lenses she required.</p>

<p>“Shocked at the unhesitating way in which we proposed the most
barbarous if not impossible operations, she replied that she would
rather try several pairs, and take those that suited her best.”</p>

<p>“... When this indecision” (of opinion) “cannot be traced to
hypochondria, we generally find indications of a defective appreciation
of quantity and a deceptive memory.</p>

<p>“Its victims measure reasons by their number and not by their weight.
They do not say 'so much' but 'so many things to be said on both
sides.’ To make the number equal on both sides they will split an
argument or state it in several ways. These ingenious self-tormentors
have invented a form of reasoning which ought to take its place beside
the 'reasoning in a circle.’ We may call it reasoning in a corner,
or tergiversation.... It derives its name from the motion of the
imprisoned monarch in a drawn game at draughts, and is resorted to
when pressed by a disjunctive argument.... In this way these clacking
metronomes endeavour to transfer their inquietude to their neighbours.”</p>

<p>“... It is this consciousness of aim that gives to their experience the
character of self-education. While other men are drifted hither and
thither by conflicting influences, their sails seem to resolve every
blast in a favourable direction. To them catastrophes are lessons and
mysteries illustrations. Every thing and every person is estimated by
its effect in accelerating personal advancement.</p>
</div>

<p><span class="pagenum" id="Page_225">[Pg 225]</span></p>

<div class="blockquot">

<p>“The aims thus adopted may be different in kind and value. One may aim
at effective deeds, another at completeness, a third at correctness,
a fourth at dignity, while another class estimates its progress by
the universality of its sentiments and the comprehensiveness of
its sympathy with the varieties of the human mind. Some, in short,
attend more to self-government, and some to mental expansion. When
these tendencies can be combined and subordinated, there emerges the
perfectly educated man, who, in the rigidity of his principles, acts
with decision, and in the expansibility of his sympathy tolerates all
opinions.”</p>


<p class="nindc space-above2">
2. “<i>What is the Nature of Evidence of Design?</i>” 1853.</p>

<p>“Design! The very word ... disturbs our quiet discussions about how
things happen with restless questionings about the why of them all.
We seem to have recklessly abandoned the railroad of phenomenology,
and the black rocks of Ontology stiffen their serried brows and frown
inevitable destruction.</p>

<p>“... The belief in design is a necessary consequence of the Laws of
Thought acting on the phenomena of perception.</p>

<p>“... The essentials then for true evidence of design are—(1) A
phenomenon having significance to us; (2) Two ascertained chains of
physical causes contingently connected, and both having the same
apparent terminations, viz., the phenomenon itself and some presupposed
personality.... If the discovery of a watch awakens my torpid
intelligence I perceive a significant end which the watch subserves
It goes, and, considering its locality, it is going well.... My young
and growing reason points out two sets of phenomena ... (<i>a</i>) the
elasticity of springs, etc. etc., and (<i>b</i>) the astronomical facts
which render the mean solar day the unit of civil time combined with
those social habits which require a cognisance of the time of day.</p>

<p>“... It is the business of science to investigate these causal chains.
If they are found not to be independent but to meet in some ascertained
point, we must transfer the<span class="pagenum" id="Page_226">[Pg 226]</span> evidence of design from the ultimate
fact to the existence of the chain. Thus, suppose we ascertained that
watches are now made by machinery ... the machinery including the watch
forms one more complicated and therefore more evident instance of
design.”</p>

<p>“... The only subordinate centres of causation which I have seen
formally investigated are men and animals; the latter even are often
overlooked. But every well-ascertained law points to some central
cause, and at once constitutes that centre a <i>being</i> in the
general sense of the word. Whether that being be <i>personal</i> is
a question which may be determined by induction. The less difficult
question whether the <i>being</i> be <i>intelligent</i> is more
practicable, and should be kept in view in the investigation of
organised beings.</p>

<p>“The search for such invisible potencies or wisdoms may appear novel
and unsanctioned.... For my part I do not think that any speculations
about the personality or intelligence of subordinate agents in creation
could ever be perverted into witchcraft or demonolatry.</p>

<p>“Why should not the Original Creator have shared the pleasure of His
work with His creatures and made the morning stars sing together, etc.?</p>

<p>“I suspect that such a hope has prompted many speculations of natural
historians, who would be ashamed to put it into words.<a id="FNanchor_187" href="#Footnote_187" class="fnanchor">[187]</a></p>
</div>

<div class="blockquot">

<p>“... Three fallacies—(1) Putting the final cause in the place of a
physical connection, as when Bernoulli saw the propriety of making the
curves of isochronous oscillations and of shortest time of descent
both cycloids; (2) The erroneous assertion of a physical relation,
as when Bacon supplemented the statement of Socrates about the
eyebrows<span class="pagenum" id="Page_227">[Pg 227]</span> by saying that pilosity is incident to moist places; (3)
(and worst) applying an argument from final causes to wrongly asserted
phenomena:—‘Because water is incompressible, it cannot transmit sound,
and therefore fishes have no ears.' Every fact here stated is erroneous”</p>

<p>In the course of this paper—in which are discernible the traces
of early impressions derived through the poetry of Milton—there
occurs also incidentally a statement of the Hamiltonian doctrine of
Perception,<a id="FNanchor_188" href="#Footnote_188" class="fnanchor">[188]</a> with the following significant corollary:—</p>
</div>

<div class="blockquot">

<p>“Perception is the ultimate consciousness of self and thing together.</p>

<p>“If we admit, as we must, that this ultimate phenomenon is incapable
of further analysis, and that subject and object alone are immediately
concerned in it, it follows that the fact is strictly private and
incommunicable. One only can know it, therefore two cannot agree in
a name for it. And since the fact is simple it cannot be thought of
by itself nor compared alone with any other equally simple fact. We
may therefore dismiss all questions about the absolute nature of
perception, and all theories of their resemblances and differences. We
may next refuse to turn our attention to perception in general, as all
perceptions are particular.”</p>


<p class="nindc space-above2">
3. <i>Idiotic Imps</i>. Summer Term, 1853.</p>

<p>Starting from Isaac Taylor’s <i>Physical Theory of another life</i>,
which Maxwell at this time seems to have regarded as in itself an
innocent and rather attractive piece of fancy,—“the perusal of it has
a tendency rather to excite speculation than to satisfy curiosity, and
the author obtains the approbation of the reader, while he fails to
convince him of the soundness of his views,”—he takes occasion from
it to<span class="pagenum" id="Page_228">[Pg 228]</span> characterise the “Dark Sciences” to which Taylor’s book may
unintentionally lend encouragement—a result to be deprecated.</p>

<p>“The first question I would ask concerning a spiritual theory would
be, Is it favourable or adverse to the present developments of Dark
Science? The Dark Sciences ... while they profess to treat of laws
which have never been investigated, afford the most conspicuous
examples of the operation of the well-known laws of association ... in
imitating the phraseology of science, and in combining its facts with
those which must naturally suggest themselves to a mind unnaturally
disposed. In the misbegotten science thus produced we have speciously
sounding laws of which our first impression is that they are truisms,
and the second that they are absurd, and a bewildering mass of
experimental proof, of which all the tendencies lie on the surface and
all the data turn out when examined to be heaped together as confusedly
as the stores of button-makers ... and those undigested narratives
which are said to form the nutriment of the minute philosopher.... The
most orthodox system of metaphysics may be transformed into a dark
science by its phraseology being popularised, while its principles are
lost sight of.”</p>

<p>Three phases of dark science are described:—</p>

<p>“(1.) At first they were or pretended to be physical sciences. Their
language was imitated from popular physics, and their professed aim
was to explain occult phenomena by means of new and still more occult
material laws. Experiments in animal magnetism were always performed
with the nose carefully turned towards the north. In electrobiology a
scrupulous system of insulation was practised at first, and afterwards,
when galvanism became more popular than statical electricity,
circuits were formed of alternate elements, those of one sex being
placed between those of the other.... The fluid which in former times
circulated through the nerves under the form of animal spirits, is in
our day expanded so as to fill the universe, and<span class="pagenum" id="Page_229">[Pg 229]</span> is the invisible
medium through which the communion of the sensitive takes place.</p>

<p>“(2.) The next phase of the dark sciences is that in which ... the
phraseology of physics is exchanged for that of psychology. In this
stage we hear much of the power of the will. The verb to will acquires
a new and popular sense, so that every one now is able to will a thing
without bequeathing it. People can will not to be able to do a thing,
then try and not succeed; while those of stronger minds can will their
victims out of their wits and back again.</p>

<p>“(3.) The third or pneumatological phase begins by distrusting, as
it well may, the explanations prevalent during the former stages of
apparitions, distant intercourse, etc. It suggests that different
minds may have some communion, though separated by space, through
some spiritual medium. Such a suggestion if discreetly followed up
might lead to important discoveries, and would certainly give rise to
entertaining meditations. But the cultivators of the dark sciences have
done as they have ever delighted to do. Their spirits are not content
with making themselves present</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">‘Where all the nerves of sense are numb,</div>
    <div class="verse indent0">Spirit to spirit, ghost to ghost.’</div>
  </div>
</div>
</div>

<p class="nind">
but they become the familiar spirits of money-making media, and rap out
lies for hours together for the amusement of a promiscuous ‘circle.’
... While the believers sit round the table of the medium and form one
loop of the figure 8, the spiritual circle enclosing the celestial
mahogany forms the upper portion of the curve, the medium herself
constituting the double point. But who shall say of the dark sciences
that they have reached the maximum of darkness? Men have listened to
the toes of a medium as to the voice of the departed. Let them now
stand about her table as about the table of devils. If one spirit can
wrap itself in petticoats, why may not another dance with three legs?
A most searching question truly! And accordingly the powerful analysis
of Godfrey has led him to the conclusion that a table of which the
plane surface is touched<span class="pagenum" id="Page_230">[Pg 230]</span> by believing fingers may be transformed into
a diaboloid of revolution.... Will there be an interminable series of
such expressions of belief, each more unnatural than its predecessor,
and gradually converging towards absolute absurdity?”</p>


<p class="nindc space-above2">
4. <i>Has everything beautiful in Art its original in Nature</i> Spring
of 1854—shortly after the Tripos Examination.</p>

<p>“As the possibility of working out the question within the time forms
no part of our specification, we may glance at heights which mock the
attenuated triangle of the mathematician, and throw our pebble into
depths which his cord and plummet can never sound.”</p>

<p>Maxwell here takes his revenge upon the Senate-house by becoming more
discursive than ever.<a id="FNanchor_189" href="#Footnote_189" class="fnanchor">[189]</a></p>

<p>He begins by deprecating precise definitions and proposing an appeal to
facts.</p>

<p>His conclusion is as follows:—“Nothing beautiful can be produced by
Man except by the laws of mind acting in him as those of Nature do
without him; and therefore the kind of beauty he can thus evolve must
be limited by the very small number of correlative sciences which he
has mastered; but as the Theoretic and imaginative faculty is far in
advance of Reason, he can apprehend and artistically reproduce natural
beauty of a higher order than his science can attain to; and as his
Moral powers are capable of a still wider range, he may make his work
the embodiment of a still higher beauty, which expresses the glory of
nature as the instrument by which our spirits are exercised, delighted,
and taught. If there is anything more I desire to say it is that while
I confess the vastness of nature and the narrowness of our symbolical
sciences, yet I fear not any effect which either Science or Knowledge
may have on the beauty of that which is beautiful once and for ever.”</p>

<p>The following observations occur in the course of the essay:—</p>
</div>

<p><span class="pagenum" id="Page_231">[Pg 231]</span></p>

<div class="blockquot">

<p>“All your analysis is cruelly anatomical, and your separated faculties
have all the appearance of preparations. You may retain their names
for distinctness, but forbear to tear them asunder for lecture-room
demonstration.... They separate a faculty by saying it is not
intellectual, and then, by reasoning blindfold, every philosopher goes
up his own tree, finds a mare’s nest and laughs at the eggs, which turn
out to be pure intellectual abstractions in spite of every definition.</p>

<p>“With respect to beauty of things audible and visible, we have a firm
conviction that the pleasure it affords to any being would be of the
same kind by whatever organisation he became conscious of it.... Our
enjoyment of music is accompanied by an intuitive perception of the
relations of sounds, and the agreement of the human race would go far
to establish the universality of these conditions of pleasure, though
Science had not discovered their physical and numerical significance.”</p>

<p><i>Beauty of Form</i>.—“A mathematician might express his admiration
of the Ellipse. Ruskin agrees with him.... It is a universal condition
of the enjoyable that the mind must believe in the existence of a law,
and yet have a mystery to move about in.... All things are full of
ellipses—bicentral sources of lasting joy, as the wondrous Oken might
have said.” Beauty of form, then, is—1. Geometrical; 2. Organic; 3.
“Rivers and mountains have not even an organic symmetry; the pleasure
we derive from their forms is not that of comprehension, but of
apprehension of their fitness as the forms of flowing and withstanding
matter. When such objects are represented by Art, they acquire an
additional beauty as the language of Nature understood by Man, the
interpreter, although by no means the emendator, of her expressions.</p>

<p>“... The power of Making is man’s highest power in connexion with
Nature.”</p>

<p><i>Beauty of Colour</i>.—“The Science of Colour does, indeed, point
out certain arrangements and gradations which follow as necessarily
from first principles, as the curves of the<span class="pagenum" id="Page_232">[Pg 232]</span> second order from their
equations. These results of science are, many of them, realised in
natural phenomena taking place according to those physical laws of
which our mathematical formulæ are symbols; but it is possible that
combinations of colours may be imagined or calculated, which no optical
phenomenon we are acquainted with could reproduce. Such a result would
no more prove the impropriety of the arrangement than ignorance of the
planetary orbits kept the Greeks from admiring the Ellipse.”</p>


<p class="nindc space-above2">
5. <i>Envelopment: Can Ideas be developed without Reference to Things
as their developing Authorities?</i> Summer Term, 1854.</p>

<p>Early in 1854 Maxwell had read J. H. Newman’s<a id="FNanchor_190" href="#Footnote_190" class="fnanchor">[190]</a> Essay on the
Development of Christian Doctrine. He appears to have felt an
inconsistency between the tenor of that work and its title, which set
him meditating on the difference between true Development—<i>i.e.</i>
Education—and Envelopment or Self-Involution, as a tendency incident
to certain habits of thought.</p>

<p>He traces the working of this tendency in various subjects ending with
theology, and then proceeds as follows:—</p>

<p>“Envelopment is a process by which the human mind, possessed with
a preternatural impatience of facts and fascinated by the apparent
simplicity of some half-apprehended theory, seeks, by involving the
chain of its speculations in hopeless confusion, to round it, as it
were, to a separate whole.</p>

<p>“Thus Mr. Newman and his predecessors take up some single practice of
Christians, and by means of analogies derived from the practices of
Egyptian priests, Roman emperors, or Jewish rabbis, they determine,
most precisely, the situation, extent, and exposure of the place of
purging by fire, together with all the technicalities, observances, and
etiquette of that mysterious region. The convolutions of the brain are
very wonderful.”</p>
</div>

<p><span class="pagenum" id="Page_233">[Pg 233]</span></p>

<div class="blockquot">

<p>As a further illustration he proceeds to trace the genesis of
phreno-mesmerism.</p>


<p>Against the Theory of the Development of Doctrine he sets the fact of
the Education of Mankind.</p>


<p class="space-above2">
The Essay is highly ironical and full of caustic touches, but it is
difficult to detach them for quotation.</p>

<p>“One great art in argument when you have the first move is to divide
everything into that which is and that which is not in some assigned
class. In this way you make it the business of the opponent to discover
what other important things there may be which may be said of the
subject in hand.</p>

<p>“... These subtle differences when further multiplied by the
application of the seven tests of development, would require a seven
years’ apprenticeship with Thomas Aquinas before anything could be said
of them except assent or contempt.</p>

<p>“... In every human pursuit there are two courses—one, that which
in its lowest form is called the useful, and has for its ultimate,
object the extension of knowledge, the dominion over Nature, and
the welfare of mankind. The objects of the second course are
entirely self-contained. Theories are elaborated for theories’ sake,
difficulties are sought out and treasured as such, and no argument is
to be considered perfect unless it lands the reasoner at the point from
which he started.</p>

<p>“... Some years ago I encountered a gentleman whose main object was
to discover the musical relations of the number eleven. I hear on
good authority that the question is not only more perplexed but more
interesting than ever.</p>

<p>“... I have unaccountably passed over that Logic by means of which
many a powerful mind has persuaded itself that it was usefully engaged
while devoting a life to the defence or attack of the fourth figure
of the syllogism, and that Metaphysics which even now seeks to find
arguments about the operations of the senses, while it rejects the aid
of physiology or any other appeal to facts.</p>
</div>

<p><span class="pagenum" id="Page_234">[Pg 234]</span></p>

<div class="blockquot">

<p>“I now proceed to envelop an argument from one of those dark sciences
which seem to have been sent up from Dom Daniel for the special purpose
of displaying reasonings of this kind.</p>

<p>“It is well known that the brain is the organ of intellectual activity.
It is held by all that the intellect is made up of many distinct
faculties. Therefore the brain must be composed of corresponding
organs.” ...</p>

<p>The Essay concludes quite seriously—“The education of man is so
well provided for in the world around him, and so hopeless in any of
the worlds which he makes for himself, that it becomes of the utmost
importance to distinguish natural truth from artificial system, the
development of a science from the envelopment of a craft.”</p>


<p class="nindc space-above2">
6. <i>Morality.</i> May 1855. (See above, p. 202), <i>Is Ethical Truth
obtainable from an Individual Point of View?</i></p>

<p>An inquiry concerning the first principles of Moral Philosophy.</p>

<p>Of three criteria, fitness, pleasure, and freedom, the last is
preferred, but is pronounced incomplete. Adam Smith’s use of the
principle of sympathy is then considered. “The repeated action of what
Smith calls sympathy, calls forth various moral principles, which may
be deduced, no doubt, from other theories, as necessary truths, but of
which the actual presence is now first accounted for.... Instead of
supposing the moral action of the mind to be a speculation on fitness,
a calculation of happiness, or an effort towards freedom, he makes it
depend on a recognition of our relation to others like ourselves.” This
method (that of self-projection) is pronounced the only true one, but
is to be extended so as to embrace other relations than that of mere
similarity.</p>

<p>Such is the bare outline of an essay which would fill at least a dozen
pages. It touches on various themes, from the origin of law to the
religious sanction of morals, and contains no little evidence of the
writer’s growing power of observing human life.</p>
</div>

<p><span class="pagenum" id="Page_235">[Pg 235]</span></p>

<div class="blockquot">

<p class="nindc space-above2">
7. <i>Language and Speculation.</i> Autumn of 1855. (See above, p.
218.) <i>Is the Modern Vocabulary of the English Language the Effect or
the Cause of its Speculative State?</i></p>

<p>A series of observations on style, original but very discursive,
chiefly aimed at certain literary affectations which were then
beginning to creep in.</p>

<p>“... The new form of the old thought must be dressed out with words,
and must attract attention by bringing forward what should be kept in
the background. No wonder the poor fellow thinks his head is turned,
when he is trying to see over the collar of his coat.</p>

<p>“... By all means let us have technical terms belonging to every
science and mystery practised by men, but let us not have mere
freemasonry or Ziph language by which men of the same cult can secretly
combine.”</p>


<p class="nindc space-above2">
8. <i>Analogies.</i> February 1856. <i>Are there Real Analogies in
Nature?</i></p>

<p>This essay contains a serious exposition of Maxwell’s deliberate views
on philosophical questions, and is therefore given here entire, not
omitting the playful opening paragraph.</p>

<p>“In the ancient and religious foundation of Peterhouse there is
observed this rule, that whoso makes a pun shall be counted the author
of it, but that whoso pretends to find it out shall be counted the
publisher of it, and that both shall be fined. Now, as in a pun two
truths lie hid under one expression, so in an analogy one truth is
discovered under two expressions. Every question concerning analogies
is therefore the reciprocal of a question concerning puns, and the
solutions can be transposed by reciprocation. But since we are still in
doubt as to the legitimacy of reasoning by analogy, and as reasoning
even by paradox has been pronounced less heinous than reasoning by
puns, we must adopt<span class="pagenum" id="Page_236">[Pg 236]</span> the direct method with respect to analogy, and
then, if necessary, deduce by reciprocation the theory of puns.</p>

<p>“That analogies appear to exist is plain in the face of things, for all
parables, fables, similes, metaphors, tropes, and figures of speech
are analogies, natural or revealed, artificial or concealed. The
question is entirely of their reality. Now, no question exists as to
the possibility of an analogy without a mind to recognise it—that is
rank nonsense. You might as well talk of a demonstration or refutation
existing unconditionally. Neither is there any question as to the
occurrence of analogies to our minds. They are as plenty as reasons,
not to say blackberries. For, not to mention all the things in external
nature which men have seen as the projections of things in their own
minds, the whole framework of science, up to the very pinnacle of
philosophy, seems sometimes a dissected model of nature, and sometimes
a natural growth on the inner surface of the mind. Now, if in examining
the admitted truths in science and philosophy, we find certain general
principles appearing throughout a vast range of subjects, and sometimes
re-appearing in some quite distinct part of human knowledge; and if,
on turning to the constitution of the intellect itself, we think
we can discern there the reason of this uniformity, in the form of
a fundamental law of the right action of the intellect, are we to
conclude that these various departments of nature in which analogous
laws exist, have a real inter-dependence; or that their relation is
only apparent and owing to the necessary conditions of human thought?</p>

<p>“There is nothing more essential to the right understanding of things
than a perception of the relations of number. Now the very first notion
of number implies a previous act of intelligence. Before we can count
any number of things, we must pick them out of the universe, and give
each of them a fictitious unity by definition. Until we have done this,
the universe of sense is neither one nor many, but indefinite. But yet,
do what we will, Nature seems to have a certain horror of partition.
Perhaps the most natural thing to count “one” for is a man or human<span class="pagenum" id="Page_237">[Pg 237]</span>
being, but yet it is very difficult to do so. Some count by heads,
others by souls, others by noses; still there is a tendency either
to run together into masses or to split up into limbs. The dimmed
outlines of phenomenal things all merge into another unless we put on
the focussing glass of theory and screw it up sometimes to one pitch of
definition, and sometimes to another, so as to see down into different
depths through the great millstone of the world.</p>

<p>“As for space and time, any man will tell you that 'it is now known and
ascertained that they are merely modifications of our own minds.' And
yet if we conceive of the mind as absolutely indivisible and capable
of only one state at a time, we must admit that these states may be
arranged in chronological order, and that this is the only real order
of these states. For we have no reason to believe, on the ground of a
given succession of simple sensations, that differences in position,
as well as in order of occurrence, exist among the causes of these
sensations. But yet we are convinced of the co-existence of different
objects at the same time, and of the identity of the same object at
different times. Now if we admit that we can think of difference
independent of sequence, and of sequence without difference, we have
admitted enough on which to found the possibility of the ideas of space
and time.</p>

<p>“But if we come to look more closely into these ideas, as developed in
human beings, we find that <i>their</i> space has triple extension, but
is the same in all directions, without behind or before, whereas time
extends only back and forward, and always goes forward.</p>

<p>“To inquire why these peculiarities of these fundamental ideas
are so would require a most painful if not impossible act of
self-excenteration; but to determine whether there is anything in
Nature corresponding to them, or whether they are mere projections of
our mental machinery on the surface of external things, is absolutely
necessary to appease the cravings of intelligence. Now it appears to me
that when we say that space has three dimensions, we not only express
the impossibility of conceiving a fourth dimension, co-ordinate<span class="pagenum" id="Page_238">[Pg 238]</span> with
the three known ones, but assert the objective truth that points may
differ in position by the independent variation of three variables.
Here, therefore, we have a real analogy between the constitution of the
intellect and that of the external world.</p>

<p>“With respect to time, it is sometimes assumed that the consecution
of ideas is a fact precisely the same kind as the sequence of events
in time. But it does not appear that there is any closer connection
between these than between mental difference, and difference of
position. No doubt it is possible to assign the accurate date of every
act of thought, but I doubt whether a chronological table drawn up in
this way would coincide with the sequence of ideas of which we are
conscious. There is an analogy, but I think not an identity, between
these two orders of thoughts and things. Again, if we know what is at
any assigned point of space at any assigned instant of time, we may be
said to know all the events in Nature. We cannot conceive any other
thing which it would be necessary to know; and, in fact, if any other
necessary element does exist, it never enters into any phenomenon so as
to make it differ from what it would be on the supposition of space and
time being the only necessary elements.</p>

<p>“We cannot, however, think any set of thoughts without conceiving
of them as depending on reasons. These reasons, when spoken of with
relation to objects, get the name of causes, which are reasons,
analogically referred to objects instead of thoughts. When the objects
are mechanical, or are considered in a mechanical point of view, the
causes are still more strictly defined, and are called <i>forces</i>.</p>

<p>“Now if we are acquainted not only with the events, but also with
the forces, in Nature, we acquire the power of predicting events not
previously known.</p>

<p>“This conception of cause, we are informed, has been ascertained to
be a notion of invariable sequence. No doubt invariable sequence, if
observed, would suggest the notion of cause, just as the end of a poker
painted red suggests the notion of heat, but although a cause without
its invariable<span class="pagenum" id="Page_239">[Pg 239]</span> effect is absurd, a cause by its apparent frustration
only suggests the notion of an equal and opposite cause.</p>

<p>“Now the analogy between reasons, causes, forces, principles, and moral
rules, is glaring, but dazzling.</p>

<p>“A reason or argument is a conductor by which the mind is led from a
proposition to a necessary consequence of that proposition. In pure
logic reasons must all tend in the same direction. There can be no
conflict of reasons. We may lose sight of them or abandon them, but
cannot pit them against one another. If our faculties were indefinitely
intensified, so that we could see all the consequences of any
admission, then all reasons would resolve themselves into one reason,
and all demonstrative truth would be one proposition. There would be
no room for plurality of reasons, still less for conflict. But when we
come to causes of phenomena and not reasons of truths, the conflict of
causes, or rather the mutual annihilation of effects, is manifest. Not
but what there is a tendency in the human mind to lump up all causes,
and give them an aggregate name, or to trace chains of causes up to
their knots and asymptotes. Still we see, or seem to see, a plurality
of causes at work, and there are some who are content with plurality.</p>

<p>“Those who are thus content with plurality delight in the use of the
word force as applied to cause. Cause is a metaphysical word implying
something unchangeable and always producing its effect. Force on the
other hand is a scientific word, signifying something which always
meets with opposition, and often with successful opposition, but
yet never fails to do what it can in its own favour. Such are the
physical forces with which science deals, and their maxim is that
might is right, and they call themselves laws of nature. But there are
other laws of nature which determine the form and action of organic
structure. These are founded on the forces of nature, but they seem to
do no work except that of direction. Ought they to be called forces?
A force does work in proportion to its strength. These <i>direct</i>
forces to work after a model. They are <i>moulds</i>, not forces.<span class="pagenum" id="Page_240">[Pg 240]</span> Now
since we have here a standard from which deviation may take place, we
have, besides the notion of strength, which belongs to force, that of
health, which belongs to organic law. Organic beings are not conscious
of organic laws, and it is not the conscious being that takes part
in them, but another set of laws now appear in very close connexion
with the conscious being. I mean the laws of thought. These may be
interfered with by organic laws, or by physical disturbances, and no
doubt every such interference is regulated by the laws of the brain
and of the connexion between that medulla and the process of thought.
But the thing to be observed is, that the laws which regulate the
right process of the intellect are identical with the most abstract
of all laws, those which are found among the relations of necessary
truths, and that though these are mixed up with, and modified by, the
most complex systems of phenomena in physiology and physics, they must
be recognised as supreme among the other laws of thought. And this
supremacy does not consist in superior strength, as in physical laws,
nor yet, I think, in reproducing a type as in organic laws, but in
being right and true; even when other causes have been for a season
masters of the brain.</p>

<p>“When we consider voluntary actions in general, we think we see causes
acting like forces on the willing being. Some of our motions arise
from physical necessity, some from irritability or organic excitement,
some are performed by our machinery without our knowledge, and some
evidently are due to us and our volitions. Of these, again, some are
merely a repetition of a customary act, some are due to the attractions
of pleasure or the pressure of constrained activity, and a few show
some indications of being the results of distinct acts of the will.
Here again we have a continuation of the analogy of Cause. Some had
supposed that in will they had found the only true cause, and that all
physical causes are only apparent. I need not say that this doctrine is
exploded.</p>

<p>“What we have to observe is, that new elements enter into the nature of
these higher causes, for mere abstract<span class="pagenum" id="Page_241">[Pg 241]</span> reasons are simply absolute;
forces are related by their strength; organic laws act towards
resemblances to types; animal emotions tend to that which promotes the
enjoyment of life; and will is in great measure actually subject to all
these, although certain other laws of <i>right</i>, which are abstract
and demonstrable, like those of reason, are <i>supreme</i> among the
laws of will.</p>

<p>“Now the question of the reality of analogies in nature derives most
of its interest from its application to the opinion, that all the
phenomena of nature, being varieties of motion, can only differ in
complexity, and therefore the only way of studying nature, is to
master the fundamental laws of motion first, and then examine what
kinds of complication of these laws must be studied in order to obtain
true views of the universe. If this theory be true, we must look for
indications of these fundamental laws throughout the whole range of
science, and not least among those remarkable products of organic life,
the results of cerebration (commonly called ‘thinking’). In this case,
of course, the resemblances between the laws of different classes
of phenomena should hardly be called analogies, as they are only
transformed identities.</p>

<p>“If, on the other hand, we start from the study of the laws of
thought (the abstract, logical laws, not the physiological), then
these apparent analogies become merely repetitions by reflexion of
certain necessary modes of action to which our minds are subject.
I do not see how, upon either hypothesis, we can account for the
existence of one set of laws of which the supremacy is necessary,
but to the operation contingent. But we find another set of laws
of the same kind, and sometimes coinciding with physical laws, the
operation of which is inflexible when once in action, but depends in
its beginnings on some act of volition. The theory of the consequences
of actions is greatly perplexed by the fact that each act sets in
motion many trains of machinery, which react on other agents and come
into regions of physical and metaphysical chaos from which it is
difficult to disentangle them. But if we could place the<span class="pagenum" id="Page_242">[Pg 242]</span> telescope
of theory in proper adjustment, to see not the physical events which
form the subordinate foci of the disturbance propagated through the
universe, but the moral foci where the true image of the original act
is reproduced, then we shall recognise the fact, that when we clearly
see any moral act, then there appears a moral necessity for the trains
of consequences of that act, which are spreading through the world to
be concentrated on some focus, so as to give a true and complete image
of the act in its moral point of view. All that bystanders see, is the
physical act, and some of its immediate physical consequences, but as a
partial pencil of light, even when not adapted for distinct vision, may
enable us to see an <i>object</i>, and not merely light, so the partial
view we have of any act, though far from perfect, may enable us to see
it morally as an act, and not merely physically as an event.</p>

<p>“If we think we see in the diverging trains of physical consequences
not only a capability of forming a true image of the act, but also of
reacting upon the agent, either directly or after a long circuit, then
perhaps we have caught the idea of <i>necessary</i> retribution, as the
legitimate consequence of all moral action.</p>

<p>“But as this idea of the <i>necessary</i> reaction of the consequences
of action is derived only from a few instances, in which we have
guessed at such a law among the necessary laws of the universe; and we
have a much more distinct idea of <i>justice</i>, derived from those
laws which we necessarily recognise as supreme, we connect the idea
of retribution much more with that of <i>justice</i> than with that
of <i>cause and effect</i>. We therefore regard retribution as the
result of <i>interference</i> with the mechanical order of things, and
intended to vindicate the supremacy of the right order of things, but
still we suspect that the two orders of things will eventually dissolve
into one.</p>

<p>“I have been somewhat diffuse and confused on the subject of moral law,
in order to show to what length analogy will carry the speculations of
men. Whenever they see a relation between two things they know well,
and<span class="pagenum" id="Page_243">[Pg 243]</span> think they see there must be a similar relation between things
less known, they reason from the one to the other. This supposes
that although pairs of things may differ widely from each other, the
relation in the one pair may be the same as that in the other. Now, as
in a scientific point of view the relation is the most important thing
to know, a knowledge of the one thing leads us a long way towards a
knowledge of the other. If all that we know is relation, and if all
the relations of one pair of things correspond to those of another
pair, it will be difficult to distinguish the one pair from the other,
although not presenting a single point of resemblance, unless we have
some difference of relation to something else, whereby to distinguish
them. Such mistakes can hardly occur except in mathematical and
physical analogies, but if we are going to study the constitution of
the individual mental man, and draw all our arguments from the laws of
society on the one hand, or those of the nervous tissue on the other,
we may chance to convert useful helps into Wills-of-the-wisp. Perhaps
the ‘book,’ as it has been called, of nature is regularly paged; if so,
no doubt the introductory parts will explain those that follow, and the
methods taught in the first chapters will be taken for granted and used
as illustrations in the more advanced parts of the course; but if it is
not a ‘book’ at all, but a magazine, nothing is more foolish to suppose
that one part can throw light on another.</p>

<p>“Perhaps the next most remarkable analogy is between the principle,
law, or plan according to which all things are made suitably to what
they have to do, and the intention which a man has of making machines
which will work. The doctrine of final causes, although productive of
barrenness in its exclusive form, has certainly been a great help to
enquirers into nature; and if we only maintain the existence of the
analogy, and allow observation to determine its form, we cannot be led
far from the truth.</p>

<p>“There is another analogy which seems to be supplanting the other
on its own ground, which lies between the principle, law, or plan
according to which the forms of<span class="pagenum" id="Page_244">[Pg 244]</span> things are made to have a certain
community of type, and that which induces human artists to make a set
of different things according to varieties of the same model. Here
apparently the final cause is analogy or homogeneity, to the exclusion
of usefulness.</p>

<p>“And last of all we have the secondary forms of crystals bursting
in upon us, and sparkling in the rigidity of mathematical necessity
and telling us, neither of harmony of design, usefulness or moral
significance,—nothing but spherical trigonometry and Napier’s
analogies. It is because we have blindly excluded the lessons of these
angular bodies from the domain of human knowledge that we are still
in doubt about the great doctrine that the only laws of matter are
those which our minds must fabricate, and the only laws of mind are
fabricated for it by matter.”</p>


<p class="nindc space-above2">
9. <i>Autobiography.</i> (Dated) 8th March 1856. <i>Is Autobiography
possible?</i></p>

<p>Under the guise of an ironical paradox, that all biography is (1)
impossible, (2) inevitable, Maxwell recommends the simple record of
facts, and deprecates the method of introspection. Of many shrewd
remarks occurring in the course of this essay, the following are the
most noticeable:—</p>

<p>“... When a man once begins to make a theory of himself, he generally
succeeds in making himself into a theory.</p>

<p>“... The truthfulness of the biography depends quite as much upon the
relations which subsisted between the author and his subject, as upon
his fidelity in collecting authentic accounts of his actions.</p>

<p>“... It will be found that the motives under which the celebrated
characters of history have acted, are, whether good or bad, pretty
much of the same order of refinement, as long as we gather them from
the same historian. It is when we pass from one historian to another
that we discover a new order of motives, both in the good and the bad
characters.</p>

<p>“... People do not talk of you, or if they do, they<span class="pagenum" id="Page_245">[Pg 245]</span> make blunders. But
they do reflect you, and that more faithfully than your looking-glass.</p>

<p>“... The stomach-pump of the confessional ought only to be used in
cases of manifest poisoning. More gentle remedies are better for the
constitution in ordinary cases.</p>

<p>“... Every man has a right and is bound to become acquainted with
himself; but he will find himself out better by intercourse with
well-chosen reagents, than by putting on his own thumbscrews, or
by sending round to his friends for their opinions. In the choice
of reagents, the first thing to be avoided is incapability and
insincerity, which generally go together.</p>

<p>“... Suppose such a history or biography to exist, where actions are
described without comment, but in a spirit faithful to the highest
truth. It will be an indestructible picture of life, which cannot be
distorted by future accidents, and which, by its clear arrangement and
perfect simplicity, is sure to pass into our experience without that
opposition which, by the constitution of man, accompanies the forcible
administration of moral precept.”</p>


<p class="nindc space-above2">
10. <i>Unnecessary Thought.</i> October (?), 1856. “<i>Is a horror of
Unnecessary Thought natural or unnatural? Which does Nature abhor most,
a superplenum or a vacuum of thought ”?</i></p>

<p>A great part of every life is necessarily unconscious or mechanical.
“We have a natural and widespread aversion to the act of thinking,
which exists more or less in all men.” But, on the other hand, abstract
thought needs to be continually checked through contact with reality,
and it is more important that our thoughts should have a living root in
experience, than that they should be perfectly self-consistent at any
particular stage of their growth.</p>

<p>“... They know the laws by heart, and do the calculations by
fingers.... When will they begin to think? Then comes active life: What
do they do that by? Precedent, wheel-tracks, and finger-posts.</p>

<p>“... There is one part of the process at least to which<span class="pagenum" id="Page_246">[Pg 246]</span> attention is
unfavourable. I mean the very important and necessary operation of
forgetting useless facts.</p>

<p>“... Growth goes on in the mind as in the body by a process of
appropriation and rejection; and the mental growth is rendered steady
and real by its close connection with material and external things.”</p>
</div>


<p class="space-above2">
11 and 12.—Two unfinished Essays, on <i>Sensation</i>, and on
<i>Reason and Faith</i>, may be probably assigned to the period of
attendance on his father’s illness in Edinburgh, in the spring of
1855. See his letter to C. J. Monro, of Feb. 19, on <a href="#Page_210">p. 210</a>. “I have
a few thoughts on ... sensation generally, and a kind of dim outline
of Cambridge palavers, tending to shadow forth the influence of
mathematical training on opinion and speculation.”</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_187" href="#FNanchor_187" class="label">[187]</a> 
This Neo-platonic fancy (of δημιουργοί), with which the
reader may contrast the serio-comic lines on “Paradoxical Philosophy,”
is embodied in the alternative title of the paper—“Ought the Discovery
of a Plurality of Intelligent Creators to weaken our Belief in an
Ultimate First Cause?” A third title has been added later in the
author’s hand—“Does the Existence of Causal Chains prove an Astral
Entity or a Cosmothetic Idealism?”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_188" href="#FNanchor_188" class="label">[188]</a> 
This statement concludes as follows:—“The late
superfluity of assertions might have been avoided by simply,
unintelligibly and therefore unanswerably, proclaiming myself a
natural dualist, uncontaminated with the heresy of unitarianism or the
pollution of cosmothetic idealism.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_189" href="#FNanchor_189" class="label">[189]</a> 
See above, <a href="#Page_167">pp. 167</a>, <a href="#Page_168">8.</a></p>

</div>

<p><span class="pagenum" id="Page_247">[Pg 247]</span></p><div class="footnote">

<p class="nind"><a id="Footnote_190" href="#FNanchor_190" class="label">[190]</a> 
Cardinal Newman.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h2 class="nobreak" id="CHAPTER_IX">CHAPTER IX.<br>
DEATH OF HIS FATHER—PROFESSORSHIP AT ABERDEEN—1856, 1857—<i>Æt.</i>
24-25.</h2>
</div>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent14">“And yet thy heart</div>
    <div class="verse indent0">The lowliest duties on herself did lay.”</div>
  </div>
</div>
</div>

<p class="nind">
SOON after his return to Cambridge in February 1856 (after
seeing his father comfortably established in Edinburgh), Maxwell
heard from his old friend Professor Forbes that the Chair of Natural
Philosophy at Marischal College, Aberdeen, was vacant, and he shortly
afterwards became a candidate. He had never contemplated a life of
entire leisure, but it may seem strange that Cambridge, where besides
his lectureship he had various philanthropic interests, should not have
afforded him a sufficient field for regular work. He foresaw that the
Scotch appointment would please his father, and that the arrangement of
session and vacation time would enable him to spend the whole summer
uninterruptedly at Glenlair. Some expressions in his letters also seem
to indicate that he rather shrank from the prospect of becoming a
Cambridge “Don.” He had observed the narrowing tendencies of college
life, and preferred the rubs of the world.</p>

<p><span class="pagenum" id="Page_248">[Pg 248]</span></p>

<p>His letters to his father and others at this time sufficiently explain
the course of his candidature, in which the point most deserving notice
is the generous way in which he speaks of his rivals. While treating
the whole matter with his usual grave irony, he seems to have conducted
his part of it with considerable sagacity, and when he returned to
Edinburgh about the middle of March everything was well in train. He
had the pleasure of knowing that his father’s interest in the question
was at least equal to his own, and that the old man had been roused by
it to some return of his former vigour. But the end was near. After a
few days spent in Edinburgh, the father and son went home to Glenlair,
as they had planned—a matter of no small anxiety and difficulty. The
short vacation had all but passed away, when, on Thursday the 2d of
April, just before his son was to have returned to Cambridge, Mr. John
Clerk Maxwell suddenly expired.</p>

<p>The outward change was not very great. Maxwell went up to Cambridge as
usual. Glenlair was still his home. His interest in his own subjects
was undiminished. His candidature for Aberdeen continued. But the
personal loss to him was incalculable and irreparable. Their long daily
companionship had been followed by a correspondence which was all but
daily, by vacations spent together, and an uninterrupted interchange,
whether present or absent, of thoughts and social interests, both light
and grave. During the last six months it is true the old man had been
failing, and, to outward observers, was considerably<span class="pagenum" id="Page_249">[Pg 249]</span> changed. But
the change had only called out his son's affection into more active
exercise, and had never checked the flow of communication by word or
letter. What depth of feeling lay beneath Maxwell’s quiet demeanour at
this time may be inferred from the poem written at Cambridge during
that summer term, and put into my hands when we met afterwards at
Glenlair. Some lines of it may be appropriately inserted here:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Yes, I know the forms that meet me are but phantoms of the brain,</div>
    <div class="verse indent0">For they walk in mortal bodies, and they have not ceased from pain,</div>
    <div class="verse indent0">Oh those signs of human weakness, left behind for ever now,</div>
    <div class="verse indent0">Dearer far to me than glories round a fancied seraph’s brow.</div>
    <div class="verse indent0">Oh the old familiar voices; oh the patient waiting eyes;</div>
    <div class="verse indent0">Let me live with them in dreamland while the world in slumber lies.</div>
    <div class="verse indent0">For by bonds of sacred honour will they guard my soul in sleep</div>
    <div class="verse indent0">From the spells of aimless fancies that around my senses creep.</div>
    <div class="verse indent0">They will link the past and present into one continuous life;</div>
    <div class="verse indent0">While I feel their hope, their patience, nerve me for the daily strife.</div>
    <div class="verse indent0">For it is not all a fancy that our lives and theirs are one,</div>
    <div class="verse indent0">And we know that all we see is but an endless work begun.</div>
    <div class="verse indent0">Part is left in nature’s keeping, part has entered into rest;</div>
    <div class="verse indent0">Part remains to grow and ripen hidden in some living breast.”</div>
  </div>
</div>
</div>

<p>Suck was James Clerk Maxwell during the “years of April blood.”</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1856.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin., 14th Feb. 1856.</i></p>

<p>Yesterday the Kay Club met at Hort’s. I took my great top there and
spun it with coloured discs attached to it. I have been planning a form
of top, which will have more variety of motion, but I am working out
the theory, so that I will wait till I know the necessary dimensions
before I settle the plan.</p>
</div>

<p><span class="pagenum" id="Page_250">[Pg 250]</span></p>

<div class="blockquot">

<p>I told Willie (Cay) how I had hung up a bullet by a combination of
threads.</p>

<p>I have drawn from theory the curves which it ought to describe, and
when I set the bullet a-going over the proper curve, it traces it out
over and over again as if it were doing a pre-ordained dance, and kept
a steady eye on the line on the paper. I have enlarged my stock of
models for solid geometry, made of coloured thread, stretched between
two pasteboard ends.</p>


<p class="nindc"><span class="allsmcap">From Professor J. D. Forbes.</span></p>

<p class="right"><i>Edinburgh, 13th Feb. 1856.</i></p>

<p>You may not perhaps have heard that Mr. Gray, Professor of Natural
Philosophy, Marischal College, Aberdeen, is dead. He was a pleasing and
energetic person, in the prime of life and health, a few months ago,
when I saw him last.</p>

<p>I have no idea whether the situation would be any object to you; but I
thought I would mention it, as I think it would be a pity were it not
filled by a Scotchman, and you are the person who occurs to me as best
fitted for it.</p>

<p>Do not imagine from my writing. that I have the smallest influence
in the matter, or interest in it beyond the welfare of the Scottish
Universities.</p>

<p>It is in the gift of the Crown. The Lord Advocate and Home Secretary
are the parties to apply to. I am not acquainted with either.</p>

<p>In the Commissioners’ Report of 1830 the emoluments are stated at about
£350. But they are not always to be depended upon.</p>

<p>Another point. I think you ought certainly to be a Fellow of the Royal
Society of Edinburgh. I shall be glad to propose you if you wish it.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 15th Feb. 1856.</i></p>

<p>Professor Forbes has written to me to say that the Professorship of
Nat. Phil, at Marischal College, Aberdeen, is vacant by the death of
Mr. Gray, and he inquires if I<span class="pagenum" id="Page_251">[Pg 251]</span> would apply for the situation, so I
want to know what your notion or plan may be. For my own part, I think
the sooner I get into regular work the better, and that the best way of
getting into such work is to profess one’s readiness by applying for it.</p>

<p>The appointment lies with the Crown—that is, the Lord Advocate
and Home Secretary. I suppose the correct thing to do is to send
certificates of merit, signed by swells, to one or other of these
officers.</p>

<p>I am going to ask about the method of the thing here, and Thacker has
promised to get me the College Testimonials. If you see any one in
Edinburgh that understands the sort of thing, could you pick up the
outline of the process?</p>

<p>In all ordinary affairs political distinctions are supposed to weigh a
great deal in Scotland. The English notion is that in pure and even in
mixed mathematics politics are of little use, however much a knowledge
of these sciences may promote the study of politics. As to Theology,
I am not aware that the mathematicians, as a body, are guilty of any
heresies, however some of them may have erred. But these are too
mysterious subjects to furnish matter for calculation, so I may tell
you that the reflecting stereoscope was finished yesterday, and looks
well, and that I got a Devil made at the same time, which I play at the
Gymnasium for relaxation and breathing time.</p>

<p>Forbes also suggests my joining the Royal Society.</p>


<p class="right"><i>Trin. Coll., 20th Feb. /56.</i></p>

<p>As far as writing (Testimonials) goes, there is a good deal, and if you
believe the Testimonials you would think the Government had in their
hands the triumph or downfall of education generally, according as they
elected one or not.</p>

<p>However, wisdom is of many kinds, and I do not know which dwells with
wise counsellors most, whether scientific, practical, political, or
ecclesiastical. I hear there are candidates of all kinds relying on
the predominance of one or other of these kinds of wisdom in the
constitution of the Government.</p>
</div>

<p><span class="pagenum" id="Page_252">[Pg 252]</span></p>

<div class="blockquot">

<p>I had a letter from Dr. Swan of Edinburgh, who is a candidate, asking
me for my good opinion, which I gave him, so far as I had one. His
printed papers are good, and I hear he is so himself. Maclennan is also
a candidate. He has the qualification of making himself understood.</p>

<p>The results of this term are chiefly solid Geometry Lectures,
stereoscopic pictures, and optical theorems. My lectures are to be on
Rigid Dynamics and Astronomy next term, so I do not expect to be out of
work by reason of Aberdeen, and I have plenty to get through in those
subjects.</p>

<p>I have been making more stereoscopic curves for my lectures. I intend
to select some and draw them very neat the size of the ordinary
stereoscopic pictures, and write a description of them, and publish
them as mathematical illustrations. I am going to do one now to
illustrate the theory of contour lines in maps, and to show how the
rivers must run, and where the lines of watershed must be.</p>


<p class="nindc"><span class="allsmcap">From his Father.</span></p>

<p class="right"><i>22d Feby. 1856.</i></p>

<p>... I believe there is some salary, but fees and pupils, I think,
cannot be very plenty. But if the <i>postie</i> be gotten, and prove
not good, it can be given up; at any rate it occupies but half the year.</p>


<p class="nindc"><span class="allsmcap">To his Father.</span></p>

<p class="right"><i>Trin. Coll., 12th March.</i></p>

<p>I was at the Working College to-day, working at decimal fractions. We
are getting up a preparatory school for biggish boys to get up their
preliminaries. We are also agitating in favour of early closing of
shops. We have got the whole of the ironmongers, and all the shoemakers
but one. The booksellers have done it some time. The Pitt Press keeps
late hours, and is to be petitioned to shut up.</p>

<p>I have just written out an abstract of the second part of my paper on
Faraday’s Lines of Force. I hope soon to write<span class="pagenum" id="Page_253">[Pg 253]</span> properly the paper
of which it is an abstract. It is four weeks since I read it. I have
done nothing in that way this term, but am just beginning to feel the
electrical state come on again, and I hope to work it up well next term.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Thursday Afternoon (3d April 1856.)</i></p>

<p><span class="allsmcap">Dear Aunt</span>—My father died to-day at twelve o’clock. He was
sleepless and confused at night, but got up to breakfast. He saw Sandy
a few minutes, and spoke rationally, then came into the drawing-room,
and sat down on a chair for a few minutes to rest, and gave a short cry
and never spoke again. We gave him ether for a little, but he could not
swallow it. There was no warning, and apparently no pain. He expected
it long, and described it so himself.</p>

<p>Do you think Uncle Robert could come and help a little? Tell Dr. Bell
and other people. As it is, it is better than if it had been when
I was away. He would not let me stay. I was to go to Cambridge on
Friday.—Your aff. nephew,</p>

<p class="right"><span class="allsmcap">J. C. Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">To Mrs. Blackburn of Killearn.</span></p>

<p class="right"><i>Glenlair, Thursday.</i></p>

<p><span class="allsmcap">Dear Mrs. Blackburn</span>—My father died suddenly to-day at 12
o’clock. He had been giving directions about the garden, and he said he
would sit down and rest a little as usual. After a few minutes I asked
him to lie down on the sofa, and he did not seem inclined to do so, and
then I got him some ether, which had helped him before.</p>

<p>Before he could take any he had a slight struggle, and all was over. He
hardly breathed afterwards.</p>

<p>He used often to talk to me about this, which has come at last, and he
seemed fully to have made up his mind to it and to be prepared for it.
His nights have sometimes been troubled, and last night I was with him
the whole time trying to get him into a comfortable sleep, which did
not come till light.</p>
</div>

<p><span class="pagenum" id="Page_254">[Pg 254]</span></p>

<div class="blockquot">

<p>Otherwise we thought him better than when in Edin. He was very glad to
get back here again.</p>

<p>I write to you that you may tell Mrs. Wedderburn. She ought to know,
and I trust you will let her know, that not only was there no pain or
distress about my father’s death, but he had often been speaking of how
glad he was that he had got everything put in. order, and that he was
home again.</p>

<p>I have written to ask my Uncle Robert Cay to come and help me in
various things, as I am rather alone here. Of course I have written to
Sir George, and will do so to other relatives as soon as I can.—Your
affte. cousin,</p>

<p class="right"><span class="allsmcap">James Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">From R. Dundas Cay, Esq., to Miss Cay, on Mr. John
Clerk Maxwell’s Death.</span></p>

<p class="right"><i>Glenlair, 8th April 1856.</i></p>

<p>I think you will be glad to hear how we are getting on. It is very nice
to see how natural James is. There is no affectation of more feeling
than he really has, but he talks away upon his own subjects when not
busy with the necessary preparations for to-morrow. Fortunately these
occupy him a good deal, and as I think the business is of use to him, I
only assist him and keep him talking. For instance, he made out all the
list and directed the letters himself; I sat by and sealed them. Then
my health requires a walk every day, so we go out and talk away very
much as usual all the time, discussing the thinning of plantations, etc.</p>

<p>It is beautiful to see the feeling of all the people towards him, all
thinking for him, and trying to assist him in every way, and he trying
to carry on everything as before:—or when he wants to make a change,
his anxiety, lest people should think he disapproves of the former
customs. For instance, he wished to have the servants in for prayers
every evening, instead of our reading by ourselves and reading to them
separately; he was quite afraid they should think his doing so would
look as if he thought it was wrong, it not having been done before.</p>
</div>

<p><span class="pagenum" id="Page_255">[Pg 255]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Trin. Coll., 22d April 1856.</i></p>

<p>I have had many things to attend to lately, which have kept me from
writing to you. I am glad you wrote to me. I got a very kind letter
from your mother and Bob, for which you must thank them meanwhile. My
uncles, Robert and Albert, stayed with me till the 15th. That day I got
a letter from Cambridge about college matters, and so I had to set to
work at home more vigorously. George Wedderburn came in the afternoon,
and we had two hard days’ work of various kinds.</p>

<p>On Friday he and I left Glenlair, and I got here on Saturday, and since
yesterday have been lecturing.</p>

<p>All things are as if I had been up after a common vacation, and I see
them all the same as they used to be. I have got back among chapels
and halls and scholarships, and all the regular routine, with now
and then some expression of condolence, which is all that strangers
can or ought to afford. Neither they nor I enter on a subject which
must be misunderstood; but it seems to me that while all the old
<i>subjects</i> are as interesting to me as ever, I talk about them
without understanding the men I talk to.</p>

<p>I have two or three stiff bits of work to get through this term here,
and I hope to overtake them. When the term is over I must go home and
pay diligent attention to everything there, so that I may learn what to
do.</p>

<p>The first thing I must do is carry on my father’s work of personally
superintending everything at home, and for doing this I have his
regular accounts of what used to be done, and the memories of all the
people, who tell me everything they know. As for my own pursuits, it
was my father’s wish, and it is mine, that I should go on with them. We
used to settle that what I ought to be engaged in was some occupation
of teaching, admitting of long vacations for being at home; and when
my father heard of the Aberdeen proposition he very much approved. I
have not heard anything very lately, but I believe my name is not yet
<span class="pagenum" id="Page_256">[Pg 256]</span>put out of question in the \(mathrm{L}^{\mathrm{d}}\). Advocate’s book.
If I get back to Glenlair I shall have the mark of my father’s work
on everything I see. Much of them is still his, and I must be in some
degree his steward to take care of them. I trust that the knowledge of
his plans may be a guide to me, and never a constraint.</p>

<p>I am glad to hear of your [Oxford] W[orking Men’s] Coll[ege]. The
preparatory school here has at once got from seventy to ninety
scholars, all in earnest, and they have had to migrate to a larger
schoolhouse.</p>

<p>We might consider of you and Bob and W. Cay coming for a quiet week or
two to Glenlair in summer, if all goes well. Bob is with Willie and
Charlie now touring.</p>

<p>I am getting a new top turned to show my class the motion of bodies of
various forms about a fixed point. I expect to get very neat results
from it, and agreeing with theory of course.</p>


<p class="nindc"><span class="allsmcap">From Professor J. D. Forbes.</span></p>

<p class="right"><i>Bridge of Allan, 30th April 1856.</i></p>

<p><span class="allsmcap">My dear Sir</span>—I have just seen in the newspaper that you have
been appointed to the Chair in Marischal College, on which I beg
sincerely to congratulate you.</p>

<p>I regret much that it should at the same time be my lot to express my
sympathy on the occasion of the recent death of your father. Such a
loss occurs but once in a lifetime. In your case I am sure that it has
the greatest alleviation which it admits of—I mean the consciousness
that you have been an affectionate and dutiful son, and that your
excellent conduct relieved your father’s mind from every shade of
anxiety regarding you.—Believe me always, yours very sincerely,</p>

<p class="right"><span class="allsmcap">James D. Forbes.</span></p>


<p class="nindc"><span class="allsmcap">To B. B. Litchfield, Esq.</span></p>

<p class="right"><i>Trinity, 4th June 1856.</i></p>

<p>On Thurs. evening I take the North-western route to the North. I am
busy looking over immense rubbish of papers, etc., for some things not
to be burnt lie among much combustible matter, and some is soft and
good for packing.</p>
</div>

<p><span class="pagenum" id="Page_257">[Pg 257]</span></p>

<div class="blockquot">

<p>It is not pleasant to go down to live solitary, but it would not be
pleasant to stay up either, when all one had to do lay elsewhere. The
transition state from a man into a Don must come at last, and it must
be painful, like gradual outrooting of nerves. When it is done there is
no more pain, but occasional reminders from some suckers, tap-roots, or
other remnants of the old nerves, just to show what was there and what
might have been.</p>
</div>

<div class="sidenote2">1856.
<i>Æt.</i> 25.</div>

<p>After his father’s death, Maxwell set himself anew to the tasks before
him, with a mingled sense of loss and responsibility. One of his
first duties was to apply himself to the management of his estate. He
remained at Glenlair during most of the summer, only making a short
excursion to Belfast on account of his cousin, William Cay, who, in
accordance with his advice, was about to study Engineering under James
Thomson, the brother of the Glasgow Professor. In the autumn, besides
entertaining Charles Hope Cay, then a boy of fifteen, in his school
holidays, he had various Cambridge friends to stay with him, as in
former years.<a id="FNanchor_191" href="#Footnote_191" class="fnanchor">[191]</a></p>

<p>In November he began his work at Aberdeen. A Scotch Professor has one
advantage over a College lecturer at Cambridge. If his students are
less advanced, he has the entire direction of their work in his own
department. It is left to him, apart from any<span class="pagenum" id="Page_258">[Pg 258]</span> prescribed system,
to determine the order in which the parts of his subject shall be
developed. His selection of topics is not dominated by the Final
Examination. This peculiarity of his position was fully appreciated
by Clerk Maxwell, whose experience of the course in Edinburgh under
Forbes, gave him a “standpoint” from which to arrange his great fund of
scientific acquirement in presenting it to his students.</p>

<p>Had Maxwell the qualities of a teacher? That he was not on the whole
successful in oral communication is an impression too widespread to be
contradicted without positive proof. Yet his letters bear sufficient
evidence that in many respects he had a true vocation as an educator.
The combination of keen sympathy with native authority and dignity,
the intense interest in his subject, his endless power of taking
trouble, his philanthropic enthusiasm, his critical study of mankind,
his wide range of language and ideas, must have enabled him to make
his mark as a public teacher, either at Aberdeen or Cambridge, if he
had remained long enough at either place to wear off some superficial
impediments, to adapt his methods to his environment, and to effect a
thorough understanding with his pupils. As it was, his lectureship at
Trinity lasted only for a year, and in the Scotch university he had
only taught for three short sessions when Marischal College was on
the point of being suppressed, and his reputation as a teacher was,
under these circumstances, brought into comparison with that of others
whose strength lay in exposition. To those who know what is implied
in academical contests<span class="pagenum" id="Page_259">[Pg 259]</span> and controversies, the mention of these facts
will be a sufficient caution against taking the lowest estimate of
Maxwell’s teaching powers; and in after years “at Cambridge, where his
class consisted of picked students,” we have good authority for saying
“his lectures were listened to with an attention and pleasure similar
to that with which his books are now read.” But at this earlier time
there were certainly drawbacks, of which he himself was imperfectly
conscious. Between his students’ ignorance and his vast knowledge, it
was difficult to find a common measure. The advice which he once gave
a friend whose duty it was to preach to a country congregation, “Why
don’t you give it them thinner?” must often have been applicable to
himself. Another hindrance lay in the very richness of his imagination,
and the swiftness of his wit. The ideas with which his mind was teeming
were perpetually intersecting, and their interferences, like those of
the waves of light, made “dark bands” in the place of colour, to the
unassisted eye. Illustrations of <i>ignotum per ignotius</i>, or of the
abstruse by some unobserved property of the familiar, were multiplied
with dazzling rapidity. Then the spirit of indirectness and paradox,
though he was aware of its dangers, would often take possession of him
against his will, and either from shyness, or momentary excitement, or
the despair of making himself understood, would land him in “chaotic
statements,” breaking off with some quirk of ironical humour. Add to
this his occasional hesitation, his shortsightedness, and the long
years of<span class="pagenum" id="Page_260">[Pg 260]</span> solitary intercourse with his father, who understood his
meaning from the slightest hint and rather encouraged the family trick
of “calling things out of their names,” and the list of hindrances is
sufficiently formidable. But he was striving to overcome those of which
he knew, and even if he had never done so completely, the weight of his
character as well as the profundity of his genius, and his unvarying
kindliness, must have won their way.</p>

<p>As marking his educational enthusiasm, it should not be forgotten here
that he continued at Aberdeen the practice which he had commenced at
Cambridge, of lecturing to working men. This was entirely voluntary,
and for aught I know may have been regarded as a piece of eccentricity.</p>

<p>A trivial incident may be recorded as throwing light on his relations
to professors and students severally. The professors had unlimited
access to the library, and were in the habit of sometimes taking out
a volume for the use of a friend. The students were only allowed two
volumes at a time. Maxwell took out books for his students, and when
checked for this by his colleagues explained that the students were his
friends.</p>

<p>Amongst the human phenomena surrounding him, one which genuinely
interested him was the religious “revival” which took place about
that time in Scotland. His intercourse with evangelical friends in
England had prepared him to sympathise with such “experiences,” and
his Calvinistic. reading had familiarised him with the language used.
And he was less<span class="pagenum" id="Page_261">[Pg 261]</span> jealous of Antinomianism than of a cut and dried
morality.<a id="FNanchor_192" href="#Footnote_192" class="fnanchor">[192]</a> But he was in no wise distracted from his professional
duties by this or anything else, and although he referred to it in
conversation, it has left no trace in any of his remaining letters
which I have seen.</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1856-1857.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To R B. Litchfield, Esq.</span></p>

<p class="right"><i>Glenlair, 4th July 1856.</i></p>

<p>I have got some prisms and opticals from Edinbro’, and I am fitting up
a compendious colour-machine capable of transportation. I have also my
top for doing dynamics and several colour-diagrams, so that if I come
to Cheltenham I shall not be empty handed. At the same time I should
like to hear from you soon.</p>

<p>I have been giving a portion of time to Saturn’s Rings, which I find
a stiff subject but curious, especially the case of the motion of a
fluid ring. The very forces which would tend to divide the ring into
great drops or satellites are made by the motion to keep the fluid in a
uniform ring.</p>

<p>I find I get fonder of metaphysics and less of calculation continually,
and my metaphysics are fast settling into the rigid high style, that
is about ten times as far <i>above</i> Whewell as Mill is <i>below</i>
him, or Comte or Macaulay <i>below</i> Mill, using above and below
conventionally like <i>up</i> and <i>down</i> in Bradshaw.</p>

<p>Experiment furnishes us with the values of our arbitrary constants,
but only suggests the form of the functions. Afterwards, when the form
is not only recognised but understood scientifically, we find that it
rests on precisely the same foundation as Euclid does, that is, it is
simply the contradiction of an absurdity, out of which may we all get
our legs at last!</p>
</div>

<p><span class="pagenum" id="Page_262">[Pg 262]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 18th July 1856.</i></p>

<p>I can promise you milk and honey and mutton, with wind and water to
match, a reasonable stock of natives of great diversity, and very
unlike any natives I know elsewhere. I also expect a cousin<a id="FNanchor_193" href="#Footnote_193" class="fnanchor">[193]</a> here,
who carries a clear and active mind in a body ditto, and I hope to make
them stick closer together by the material above stated.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 9th September 1856.</i></p>

<p>My only hope for Pomeroy is that he may keep his health; if that
remains I think it quite presumptuous to interfere with him by hopes
or otherwise, for I would rather be interfered with by him (from which
I am safe) than bother a man who steers so well himself. You must
remember that besides the clerical shell of respectability which is to
be put on, there is sometimes a lay shell of ανηριθμον γελασμα, which
has in some measure to be put off, or perhaps more truly drawn in, for
no one that has once known can ever forget that instead of two views
there are three, good, bad, and grotesque; and tho’ all things are full
of jokes, that does not hinder them from being quite full, or even
more so, of more solemn matters. It also strikes me that if we were to
compare notes, the thing we would most differ about would be the notion
we have of the “standpoint” (see religious prints, <i>passim</i>) of
the men whom we know in common.</p>

<p>My own notion is that you see him where he ought to be according to
principle, and I see him where he acts, as if he was, that is, in the
position which would naturally produce his actual life. But I find
on comparing notes with other people that a man always shows himself
up differently according to the man who is with him. In fact I do it
myself, so I must now show up the fishing side for the benefit of
Charlie (Cay).</p>
</div>

<p><span class="pagenum" id="Page_263">[Pg 263]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, 14th October 1856.</i></p>

<p>... During September I had Lushington, Maclennan, and two cousins “Cay”
here. Now I am writing a solemn address or manifesto to the Natural
Philosophers of the North,<a id="FNanchor_194" href="#Footnote_194" class="fnanchor">[194]</a> which I am afraid I must reinforce with
coffee and anchovies, and a roaring hot fire and spread coat-tails to
make it all natural. By the way, I have proved that if there be nine
coefficients of magnetic induction, perpetual motion will set in, and
a small crystalline sphere will inevitably destroy the universe by
increasing all velocities till the friction brings all nature into a
state of incandescence, or as H—— would say, Terrestrial all in Chaos
shall exhibit efflorescence.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>129 Union Street, Aberdeen,<br>
27th February 1857.</i></p>

<p>You are right about my being two letters in debt to you. I proceed to
“post you up” to the most recent epoch. The weather is mild and sunny,
but the winter has been severe. The planets Jupiter and Venus have been
neighbours; Saturn, Mars, and Mercury also visible.</p>

<p>To descend to particulars. I find everything going on very smoothly.
I never passed an equal time with less trouble. I have plenty of work
but no vexation as yet. In fact, I am beginning to fear that I must get
into some scrape just to put an end to my complacency.</p>

<p>I will begin with the College. We are having public meetings and
caucuses (that is, the students are) for the election of Lord Hector.
Lord Stanley won’t come. Lord Elgin is doubtful. They seem to prefer
Elgin to Layard. We are to have a commission consisting of Col. Mure,
Cosmo Innes, and Stirling of Keir.</p>

<p>To-morrow I hold my second general examination on the subject we have
done. I hope that my men of science<span class="pagenum" id="Page_264">[Pg 264]</span> won’t have their heads turned with
politics. I have all the squibs regularly presented to me. They are not
very good.</p>

<p>I have had 13 special examinations, and the two last have been the best
answered of any. I send you my paper for to-morrow to give it to Bob
Campbell with my profoundest esteem.</p>

<p>We have been at the theory of Heat and the Steam Engine this month, and
on Monday we begin Optics. I have a volunteer class who have been thro’
astronomy, and we are now at high Optics. Tuesday week I give a lecture
to operatives, etc., on the Eye. I have just been getting cods’ and
bullocks’ eyes, to refresh my memory and practise dissection. The size
of the cod and the ox eye is nearly the same. As this was our last day
of fluids, I finished off with a splendid fountain in the sunlight. We
were not very wet.</p>

<p>Out of College I have made the most of my time in seeing the natives.
I used to walk <i>every day</i> with Professor Martin, but he was not
well for some time, and we broke that habit. I get on better with
people of more decision and less refinement, because they keep me in
better order.</p>

<p>I have been keeping up friendly relations with the King’s College men,
and they seem to be very friendly too. I have not received any rebukes
yet from our men for so doing, but I find that the families of some
of our professors have no dealings, and never had, with those of the
King’s people. Theoretically we profess charity.</p>

<p>I had a glorious solitary walk to-day in Kincardineshire by the
coast—black cliffs and white breakers. I took my second dip this
season. I have found a splendid place, sheltered and safe, with
gymnastics on a pole afterwards.</p>


<p class="nindc"><span class="allsmcap">To the Rev. Lewis Campbell.</span></p>

<p class="right"><i>129 Union Street,<br>
Aberdeen, 6th February 1857.</i></p>

<p>I got your letter<a id="FNanchor_195" href="#Footnote_195" class="fnanchor">[195]</a> this morning at breakfast. I was somewhat seedy
from being up late, but the perusal seemed<span class="pagenum" id="Page_265">[Pg 265]</span> to clear up everything, and
I got on better with explaining the properties of elastic fluids than
I had any reason to hope. So when I have doubts about the best mode of
explaining anything, I must consult your letter, only it will not do
for ever. I must have a new one now and then.</p>
</div>

<div class="blockquot">

<p>But I have not been so glad for long. Knowing you of old, I can see
how things are by the way you write, and it is not always that similar
announcements have given me similar satisfaction.</p>

<p>So I am glad that you do not know what “it” was. Avoid the neuter
pronoun. “It” is unworthy of beasts that perish. “He” and “She” are
for ever and ever. What the form of the pronoun may be after this I
cannot tell, but I think more is meant in the distinction than is fully
expressed in this life.</p>

<p>The Sadducees on the one side, and the ascetics on the other, point out
the errors. Solomon, Prov. <span class="allsmcap">VIII.</span>, <i>et passim</i>, and Eph.
<span class="allsmcap">VI.</span>, indicate matter of contemplation not unallied to action,
which in good ground bears good fruit.</p>

<p>But as Urania remarked to Melpomene, I am but displaying the fact of my
belonging to a lower stage in the scale of things, so I must for the
present go down beside my native rill.</p>

<p>With respect to this “northern hermitage,” my cell is pretty
commodious. In quitting the cenobitic cloister of Trinity for the
howling wilderness of Union Street, I have not been made an anchoret.
It is quite consistent with the eremitic life to modify one’s fast in
friends’ houses 4 days per week or so.</p>

<p>One thing I am thankful for, though perhaps you will not believe
it.—Up to the present time I have not even been tempted to mystify any
one.</p>

<p>I have made out who were most likely to excite my passion that way,
and I have avoided some, and broken the ice with others. I am glad
B—— is not here; he would have ruined me. I once met him. I was as
much astonished as he was at the chaotic statements I began to make.
But as far as I can learn I have not been misunderstood<span class="pagenum" id="Page_266">[Pg 266]</span> in anything,
and no one has heard a single oracle from my lips. Of course I do
not mean that my class do not mistake my meaning sometimes. That is
found out and remedied day by day. I speak of professors, ministers,
doctors, advocates, matrons, maidens, and phenomenal existences
(Chimeræ bombylantes in vacuo). We are through mechanics. I had an
\(\mathrm{ex}^{\mathrm{n}}\) on bookwork on 24th Jan. I got answers to
all the questions and riders, though no one floored them all right. I
have now to be brewing experiments on Heat, as well as determining the
form of doctrine to be presented to the finite capacities of my men.</p>


<p class="nindc"><span class="allsmcap">From C. J. Monro, Esq.</span></p>

<p class="right"><i>15th February 1857.</i></p>

<p>Have you seen the Pomeroy packet? It has much more in it than any
travels I ever read. Lots of phenomena, human and otherwise, on the way
out: especially the waves in a storm....</p>

<p>... They who deal in instruments of strings say that if you strike
a certain note you hear certain others above. Is that because of
the further terms in a Fourier’s integral, or because a sympathetic
vibration is excited in certain other of the strings of the same
instrument? I observe Weber says that it does not occur in wind
instruments.</p>


<p class="nindc"><span class="allsmcap">From Professor J. D. Forbes.</span></p>

<p class="right"><i>Edinburgh, 31st March 1857.</i></p>

<p><span class="allsmcap">My dear Maxwell</span>—I have often wished to ask you to tell me
how your first session had turned out; consequently I was exceedingly
glad to get your letter this Evening, and to find that you have not
been disappointed in the results of the step to which you kindly say
that my assistance was of some use. In what you say about the monotony
of reiteration, I can confidently assure you that your conclusions are
quite correct; certain precautions being taken which an active mind
like yours is sure to fall upon.</p>

<p>We shall be delighted to see you at the R. S. on the 20th<span class="pagenum" id="Page_267">[Pg 267]</span> and to have
your paper, which, if convenient, please to put into my hands, as a
matter of form, when ready.</p>

<p>I have been at several meetings of the Society, but am feeling a little
just now the effects of the season and the winter’s work, so I shall
not be there on the 6th. On the whole, however, I have got through the
winter well.</p>

<p>I shall like much to see your Top, of which I read the account in the
<i>Athenæum</i>.</p>

<p>Have you observed in that same flippant paper for last Saturday an
attack upon Faraday (as it seems to me) of a most presumptuous and
ignorant kind? Though by no means as yet a convert to the views which
Faraday maintains, yet I have so far a general appreciation of them as
to believe that this conceited mathematician (some fifteenth Cambridge
wrangler, I guess) is ignorant altogether of what Faraday wishes to
prove.—Always yours sincerely,</p>

<p class="right"><span class="allsmcap">James D. Forbes.</span></p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, Springholm,<br>
Dumfries, 20th May 1857.</i></p>

<p>I went to Old Aberdeen for Fourier, ... but I have forgotten what was
to be discovered out of him.</p>

<p>The session went off smoothly enough. I had Sun all the beginning of
optics, and worked off all the experimental part up to Fraunhofer’s
lines, which were glorious to see with a water prism I have set up in
the form of a cubical box, 5 inch side. The only things not generally
done that I attempted last session were the undulatory medium made of
bullets for advanced class, and Plateau’s experiments on a sphere of
oil in a mixture of spirits and water of exactly its own density.</p>

<p>I succeeded very well with heat. The experiments on latent heat came
out very accurate. That was my part, and the class could explain
and work out the results better than I expected. Next year I intend
to mix experimental physics with mechanics, devoting Tuesday and
<span class="allsmcap">Thursday<span class="pagenum" id="Page_268">[Pg 268]</span></span> (what would Stokes say?) to the science of
experimenting accurately.</p>

<p>I got a glorified top made at Aberdeen. I think you saw the wooden type
at Cambridge. I have made it the occasion of a short screed on rotation
coming out in the Roy. Soc., Edinburgh, presently.</p>

<p>Last week I brewed chlorophyll (as the chemists word it), a green
liquor, which turns the invisible light red. My pot of all the winter
spinach that remained was portentous, so I exhibited the optical
effects, which were allowed to be worth the potful.</p>

<p>My last grind was the reduction of equations of colour which I made
last year. The result was eminently satisfactory.</p>


<p class="nindc"><span class="allsmcap">To R B. Litchfield, Esq.</span></p>

<p class="right"><i>Glenlair, 29th May 1857.</i></p>

<p>It is with a profound feeling of pity that I write to a denizen of Hare
Court after participating in the blessings of this splendid day. We had
just enough of cloud to prevent scorching, and the grass seemed to like
to grow just as much as the beasts to eat it.</p>

<p>I have not had a mathematical idea for about a fortnight, when I wrote
them all away to Prof. Thomson, and I have not got an answer yet with
fresh ones. But I believe there is a department of mind conducted
independent of consciousness, where things are fermented and decocted,
so that when they are run off they come clear.</p>

<p>By the way, I found it useful at Aberdeen to tell the students what
parts of the subject they were mt to remember, but to get up and forget
at once as being rudimentary notions necessary to development, but
requiring to be sloughed off before maturity.</p>

<p>I have no one with me but the domestics and dog. The valley seems
deserted of its gentry; but we have one gentleman from Dumfriesshire,
who is living in a hired house, and building with great magnificence
an Episcopal Chapel in Castle-Douglas at his own expense. His own
house is 20 miles off, a capital place, and this is perhaps the least<span class="pagenum" id="Page_269">[Pg 269]</span>
Episcopal part of Scotland by reason of the memory of the dragoons.
One old family of the Stewartry is of that persuasion, and most of
the persecutors’ families are now Presbyterian and Whig, so that the
congregation is but feeble.</p>

<p>It is very different at Aberdeen, where the Presbyterians persecuted
far more than the Prelatists, so there I actually found a true Jacobite
(female, I could not undertake to produce a male specimen), and there
are three distinct Episcopal religions in Aberdeen, all pretty lively.</p>

<p>Can you tell me what the illustrated Tennyson is like? I shan’t see it
till I go to Edinbro’. I don’t mean are the prints the best possible,
or impervious to green spectacles; but are they nice diagrams as such
things go? I should like to know before long about it, and whether the
characters are of the Adamic type, and in reasonable condition, or
pre-Rafaelitic in all but colour, and symbolising everything except the
“Archetypal Skeleton” and the “Nature of Limbs.”</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, 5th June 1857.</i></p>

<p>I have not seen article seven, but I agree with your dissent from
it entirely. On the vested interest principle, I think the men who
intended to keep their fellowships by celibacy and ordination, and
got them on that footing, should not be allowed to desert the virgin
choir or neglect the priestly office, but on those principles should
be allowed to live out their days, provided the whole amount of souls
cured annually does not amount to £20 in the King’s Book. But my
doctrine is that the various grades of College officers should be set
on such a basis that, although chance lecturers might be sometimes
chosen from among fresh fellows who are going away soon, the reliable
assistant tutors, and those that have a plain calling that way, should
after a few years be elected permanent officers of the College, and be
tutors and deans in their time, and seniors also, with leave to marry,
or rather, never prohibited or asked any questions on that head, and
with leave to retire after<span class="pagenum" id="Page_270">[Pg 270]</span> so many years’ service as seniors. As for
the men of the world, we should have a limited term of existence, and
that independent of marriage or “parsonage.”</p>

<p>I saw a paragraph about the Female’ Artists Exhibition, and that Mrs.
Hugh Blackburn had her Phaethon there.... She has done a very small
picture of a haystack making, somewhat pre-Raphaelite in pose, but
graceful withal, and such that the Moidart natives know every lass
on the stack, whether seen behind or before. It was at the Edinburgh
Academy of Painters.</p>

<p>I have done a screed of introduction to optics, and am at a sort
of general summary of mechanical principles—doctrines relating to
absolute and relative motion, analysis of the doctrine of Force into
the smallest number of independent truths, theory of angular momentum
and couples of work done, and <i>vis viva</i>, of actual and potential
energy, with continual jaw on the doctrine of measurement by units all
through.</p>


<p class="nindc"><span class="allsmcap">To Rev. Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, 7th August 1857.</i></p>

<div class="sidenote"><i>Æt.</i> 26.</div>

<p>I got your letter yesterday. I have oftener corresponded with people
I expected to see than with those I had just left, so you must excuse
my being rather more glad of it than if I had expected it. So you were
better than I took you for; put that in the Logic-mill and grind it
by “Conversion of Props.” Since you left I have been stirring up old
correspondents. Poor W—— is “himself again,” with not many to care
about him. He could not keep the A—— youths in order, and tried
to get his authority backed by the big authorities. Then I suppose
ensued a struggle between bodily weakness and hesitation, and mental
sternness, stubbornness, and conscientiousness. The result probably
was something severe in substance and mild in manner, or otherwise
open to scorn from the youths.—I don’t know, but he has resigned his
place. The youths then proceeded to express their penitence, and the
authorities their regret. But he is now taking private pupils for that
seat of ... learning, with not more friends and friendliness than<span class="pagenum" id="Page_271">[Pg 271]</span> of
old. Not exactly. I am glad to hear of his knowing some mathematical
men, actuaries, etc., and corresponding with them, and he is much more
friendly by the post than by speech and face.</p>

<p>Yesterday we did our Castle-Douglas, and round by Greenlaw (Gordon,
Esq.) Old Greenlaw impounded us at once, and embarked us in his boat
down to Threave Castle, where some falsified antiquity, and some apart
behind thick woven thorns bathed in the black water of Dee.</p>

<p>Then back to dinner with another party of chance visitors, songs both
of the drawing-room and the quire and the cotton fields, and, to
conclude, the unpremeditated hop.</p>

<p>The thing was not destitute of its humours. Old Greenlaw, heir of
entail, with charters in his bedroom belonging to “Young Lochinvar”
his forbear, and various Douglases, with rights of pit and gallows,
and other curious privileges, sending all his people and visitors
neck and heels in the very best direction for themselves. Son and
daughter—mild, indefatigable, generally useful, doing (at home)
exactly as they are bid. One gay litter(ar)y widow, charming never so
wisely, with her hair about her ears and her elbows on her knees, on a
low stool, talking Handel, or Ruskin, or Macaulay, or general pathos of
unprotected female, passing off into criticism, witticism, pleasantry,
unmitigated slang, sporting, and betting.</p>

<p>One little Episcopal chaplain, a Celt, whom I see often, but do not
quite fathom—that is, I don’t know how far he respects and how far he
is amused with his most patronising friends. One, mathematical teacher
somewhere,—friend to chaplain. Voice. Mild, good fellow, like a grown
up chorister, quite modest about everything except his voice—“What
will they say in England,” “The Standard Bearer,” “Oh Susannah”
(Chaplain leads chorus), “Courtin’ down in Tenessee” (Chaplain
obligato), “Yet once more” (Handel), “But who may abide” (do.), and so
on.</p>

<p>One good old widow lady, with manners. One son to
\(\mathrm{d}^{\circ}.\), —sanguine temperament, open countenance, very
much run to nose, brain inactive, probably fertile in military virtue.<span class="pagenum" id="Page_272">[Pg 272]</span>
Two daughters to \(\mathrm{d}^{\circ}.\),—healthy, physical force
girls, brains more developed owing to their not having escaped in the
form of nose.</p>

<p>Now, conceive the Voice set down beside one of the physical forces,
and trying to interest her in the capacities of different rooms for
singing in, she being more benevolent and horsefleshy than technically
musical,—the Chaplain entertaining the other with an account of his
solitary life in his rooms,—old Greenlaw hospitably entreating the
mannerly widow, and trying to get the Nose to talk.</p>

<p>The young widow fixed on Colin, and informed him that if Solomon were
to reappear with all his wisdom, as well as his glory, he would yet
have to learn the polka; and that the mode of feasting adopted by the
Incas of Peru reminded her strongly of a custom prevalent among the
Merovingian race of kings of France.</p>

<p>Living in the Pampas she regarded as an enviable lot, and she was at
a loss to know the best mode of studying Euclid for the advantage of
being able to teach a young brother of six (years old).</p>

<p>So we did not get home till near 11, and I had to be up at Glenlair
at 5 this morning, the result of which is that at 12 to-night I am
a little sleepy. Johnnie<a id="FNanchor_196" href="#Footnote_196" class="fnanchor">[196]</a> can swim across the big pool at the
Chapel, all by himself. His taste of water through the nose did him
great good.... I have had some races after stones down the water in
Loch Loan. I have kept the stone in sight a good way, but it has always
beaten me. I’ll try some broken crockery to begin with.</p>

<p>I have succeeded in establishing the existence of an error in my
Saturnian mazes, but I have not detected it yet. I have finished the
first part of the Réligion Naturelle.<a id="FNanchor_197" href="#Footnote_197" class="fnanchor">[197]</a> I am not a follower of those
who believe they know what perfection must imply, and then make a deity
to that pattern; but it is very well put, and carries one through,
though if the book belongs to this age at all, it is eminently unlike
most books of this century in England. But I only know<span class="pagenum" id="Page_273">[Pg 273]</span> one other book
of French argument on the positive (not positiviste) side, and that
also worked by “demonstration.” My notion is, that reason, taste, and
conscience are the judges of all knowledge, pleasure, and action, and
that they are the exponents not of a code, but of the unwritten law,
which they reveal as they judge by it <i>in presence of the facts</i>.
The facts must be witnessed to by the senses, and cross-examined by
the intellect, and not unless everything is properly put on record and
proved as fact, will any question of law be resolved at headquarters.</p>

<p>We are only going through our Lehrjahr in the knowledge of Perfection,
and we may have a Wanderjahr to complete even after getting the first
diploma, which is a certificate of having eyes to see the work, a
conscience to feel after Right, and faith to believe in the Word, and
to reach a station thereby where both those eyes and that conscience
may be satisfied, or at least appeased. I do not think it is doing
Reason, etc. any injustice to say that rough dead facts are the
necessary basis on which to work in order to elicit the living truth,
not from the facts, but either from the utterer of facts or the giver
of Reason, which two are one, or Reason would never decipher facts.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">For know, whatever was created needs</div>
    <div class="verse indent0">To be sustained and fed. Of elements</div>
    <div class="verse indent0">The grosser feeds the purer, etc.</div>
    <div class="verse indent0">—— various degrees</div>
    <div class="verse indent0">Of substance, and in things that live, of life</div>
    <div class="verse indent14">Meanwhile enjoy</div>
    <div class="verse indent0">Your fill what happiness this happy state</div>
    <div class="verse indent0">Can comprehend, incapable of more.</div>
  </div>
</div>
</div>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_191" href="#FNanchor_191" class="label">[191]</a> 
With one of these, who happened to be “Carlyle-mad,”
he drove one day on pilgrimage to Craigenputtock. The enthusiast, in
his rapture, harangued an old peasant, who was hoeing “neeps,” on
the glorious doings of the former tenant of the farm-house. The man
listened, stooping over his work till the rhapsody was over, then
looked up for a moment saying, “It is aye gude that mends,” and resumed
his labour. Maxwell was fond of relating this.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_192" href="#FNanchor_192" class="label">[192]</a> 
See <a href="#Page_111">p. 111.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_193" href="#FNanchor_193" class="label">[193]</a> 
Charles Hope Cay.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_194" href="#FNanchor_194" class="label">[194]</a> 
His Inaugural Lecture at Aberdeen.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_195" href="#FNanchor_195" class="label">[195]</a> 
Announcing our marriage engagement.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_196" href="#FNanchor_196" class="label">[196]</a> 
His cousin John Cay, younger brother of William and
Charles.</p>

</div>

<p><span class="pagenum" id="Page_274">[Pg 274]</span></p>

<div class="footnote">

<p class="nind"><a id="Footnote_197" href="#FNanchor_197" class="label">[197]</a> 
By M. Jules Simon.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h2 class="nobreak" id="CHAPTER_X">CHAPTER X.<br>
<span class="allsmcap">ABERDEEN—MARRIAGE—1857 TO 1860</span>, <i>Æt.</i> 26-29.</h2>
</div>

<p class="nind">
THE Glenlair letters of 1857 (see last chapter) sufficiently
indicate, Maxwell’s mental condition in the interval between his first
and second sessions at Aberdeen. His expansive sociable spirit is
putting forth fresh feelers, and he has made a new beginning in his
observation of man in society. But he has not yet recovered from the
loss of the preceding year, and those who read between the lines cannot
fail to trace here and there a touch of sadness peering from beneath
the habitual buoyancy of his style.</p>

<p>In September of this year another loss renewed the feeling of
desolation which had haunted him since his father’s death. His friend
Pomeroy, whom he had nursed in illness, and of whose career in India
he had augured so highly, was carried off by a second attack of fever,
caused by a hurried journey during the first outbreak of the Mutiny.
Maxwell’s letters to Mr. Litchfield show how keenly he felt this blow,
and what deep thoughts on human life and destiny were once more stirred
up in him.</p>

<p>His original work on electricity was now for a while interrupted by
another laborious task, which<span class="pagenum" id="Page_275">[Pg 275]</span> absorbed his best energies for more than
a year. The examiners for the Adam’s Prize, given by St. John's College
in honour of the discovery of Neptune,<a id="FNanchor_198" href="#Footnote_198" class="fnanchor">[198]</a> had set as a subject,
“The Structure of Saturn's Ring.” To frame and test an hypothesis
which should account for the observed phenomena was a problem of no
ordinary complexity, and one to which the speculative imagination and
mathematical ingenuity of Clerk Maxwell were particularly adapted. It
appears to have completely fascinated him for the time. The essay by
which he gained the prize, and which he published after elaborately
revising it, is well known to students, and the allusions to the
subject in his letters at this time will be read with interest.</p>

<p>Such was the strain of feeling, and such the chief intellectual
interest, with which he returned to Aberdeen, where he seems to have
been once more destined, though in his native country, to understand
more than he was understood; and in his letters, together with the
deepening earnestness and the unfailing humour, there is now and then
mingled for the first time a grain of bitterness, or what may be
taken for such. But it is rather the cry of a spirit hungering for
completion. And the phase of disharmony quickly passes off, and is
followed by a song of triumph.</p>


<p class="space-above2">
Of his new acquaintances at Aberdeen he had become most intimate with
the family of Principal Dewar of Marischal College, and he was a
frequent<span class="pagenum" id="Page_276">[Pg 276]</span> visitor at their house. His deep and varied knowledge, not
only of his own and kindred subjects, but of history, literature, and
theology, his excellence of heart, and the religious earnestness which
underlay his humorous “shell,” were there appreciated and admired. He
had been asked to join them in their annual visit to Ardhallow, the
home of the Principal’s son-in-law, Mr. M‘Cunn, in the neighbourhood of
Dunoon, and had accepted the invitation. The time of his stay there in
September 1857 is marked by letters which, unlike some others of this
period, reflect his brightest mood.</p>


<p class="space-above2">
In February 1858 he announced his betrothal to Katherine Mary Dewar,
and they were married early in the following June. In May he had made
a journey to the south of England to visit me in my parish of Milford,
in Hampshire, and to act as “best man” on the occasion of our marriage,
which took place at Brighton. My wife and I found our way to Aberdeen
in time to be present at the wedding there, and were shortly afterwards
entertained at Glenlair.</p>

<p>The correspondence of these months and the poems then written contain
the record of feelings which in the years that followed were transfused
in action and embodied in a married life which can only be spoken of as
one of unexampled devotion.<a id="FNanchor_199" href="#Footnote_199" class="fnanchor">[199]</a></p>


<p class="space-above2">
He remained for two more sessions at Aberdeen.<span class="pagenum" id="Page_277">[Pg 277]</span> But in 1860 came the
fusion of the colleges, and the Professorship of Natural Philosophy at
Marischal College was one of those suppressed. In the same winter his
old friend Professor James D. Forbes, after struggling for eight years
against ill-health, resigned his Chair, and Maxwell became a candidate
for the vacant post. It is enough to have alluded once for all<a id="FNanchor_200" href="#Footnote_200" class="fnanchor">[200]</a> to
the contest, which ended in the appointment of Professor Tait. It only
remains to say that Maxwell’s relations with that eminent man, who had
been his companion both in Edinburgh and at Cambridge, always continued
to be of the most friendly kind; and their correspondence, often of
the quaintest description, would of itself fill a volume of very
entertaining reading for those possessed of a clue to the labyrinth of
science, learning, wit, and frolicsome allusion, which it contains.
The two men looked over proof-sheets of each other’s writings, and
when they most differed, Maxwell’s criticism condensed in humorous
verse was always understood and welcomed by the Edinburgh Professor. In
the summer<span class="pagenum" id="Page_278">[Pg 278]</span> of 1860 the ex-professor of Aberdeen was appointed to the
vacant Professorship of Natural Philosophy in King’s College, London.</p>

<div class="blockquot">

<p class="nindc space-above2">
<span class="allsmcap">To Lewis Campbell, Esq.</span></p>

<p class="right"><i>Glenlair, 28th August 1857.</i></p>

<p>... I have been battering away at Saturn, returning to the charge every
now and then. I have effected several breaches in the solid ring, and
now I am splash into the fluid one, amid a clash of symbols truly
astounding. When I reappear it will be in the dusky ring, which is
something like the state of the air supposing the siege of Sebastopol
conducted from a forest of guns 100 miles one way, and 30,000 miles the
other, and the shot never to stop, but go spinning away round a circle,
radius 170,000 miles....</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Ardhallow, Dunoon, 4th Sept. 1857.</i></p>

<p>The road along Loch Eck is the most glorious for shape and colour of
hills and rocks that I have seen anywhere, specially on a fine calm
day, with clouds as well as sun, and with large patches of withered
bracken mixed with green on the less steep parts of the hills. Then the
crushing and doubling up of the strata, and the slicing and cracking
of the already doubled up strata, quite without respect to previous
torment, gives a notion of active force, as well as passive, even to
ungeological minds. We inspected Duncan Marshall, the Hermit of these
parts, and wound up the day with a pull in the boat till dark....</p>

<p>Mrs. Wed[derburn] professes herself ready to “follow South” when
asked, so when Johnny and I have done our Moidart and Loch Aylort,
we shall hoist sail or get up steam or something, and then very
likely he may reappear to his parent and aunt, and I shall continue
my road with my aunt to wait upon the faithful Tobs, and realise
Saturn’s Rings, and probably feed a few natives of the valley with<span class="pagenum" id="Page_279">[Pg 279]</span>
the produce of its soil. I was writing great screeds of letters
to Professor Thomson about those Rings, and lo! he was a-laying
of the telegraph which was to go to America, and bringing his
obtrusive science to bear upon the engineers, so that they broke
the cable with not following (it appears) his advice. However,
I know nothing. List to the new words to a common song, which I
conceived on the railway to Glasgow. As I have only a bizzing, loose,
interruption-to-talking-&amp;-deathblow-to-general-conversation-memory of
the orthodox version, I don’t know if the metre is correct; but it
is some such rambling metre anyhow, and contains some insignificant
though apparently treasonable remarks in a perfect thicket of vain
repetitions. To avoid these let \((\mathrm{U})\) = “Under the sea,”
so that \(2(\mathrm{U})=\), by parity of reasoning, represents two
repetitions of that sentiment. This being granted, we shall have as
follows:—</p>
</div>

<div class="poetry-container"><span class="allsmcap">The Song of the Atlantic Telegraph Company.</span></div>
<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="verse indent0">Mark how the telegraph motions to me,</div>
    </div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="verse indent11">Signals are coming along,</div>
    <div class="verse indent6">With a wag, wag, wag;</div>
    <div class="verse indent0">The telegraph needle is vibrating free,</div>
    <div class="verse indent0">And every vibration is telling to me</div>
    <div class="verse indent6">How they drag, drag, drag,</div>
    <div class="verse indent11">The telegraph cable along,</div>
    </div>
    <div class="poetry-container">II.</div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="verse indent0">No little signals are coming to me,</div>
    </div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
    <div class="stanza">
    <div class="verse indent11">Something has surely gone wrong,</div>
    <div class="verse indent6">And it’s broke, broke, broke;</div>
    <div class="verse indent0">What is the cause of it does not transpire,</div>
    <div class="verse indent0">But something has broken the telegraph wire</div>
    <div class="verse indent6">With a stroke, stroke, stroke,</div>
    <div class="verse indent11">Or else they’ve been pulling too strong.</div>
  </div>
    <div class="poetry-container">III.<span class="pagenum" id="Page_280">[Pg 280]</span></div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="verse indent0">Fishes are whispering. What can it be,</div>
    </div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="stanza">So many hundred miles long?</div>
    <div class="verse indent6">For it’s strange, strange, strange,</div>
    <div class="verse indent0">How they could spin out such durable stuff,</div>
    <div class="verse indent0">Lying all wiry, elastic, and tough,</div>
    <div class="verse indent6">Without change, change, change,</div>
    <div class="verse indent11">In the salt water so strong</div>
</div>
    <div class="poetry-container">IV.</div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
  <div class="stanza">
    <div class="verse indent0">There let us leave it for fishes to see;</div>
</div>
    <div class="poetry-container">\(2(\mathrm{u})\)</div>
    <div class="stanza">
    <div class="verse indent11">They’ll see lots of cables ere long,</div>
    <div class="verse indent6">For we’ll twine, twine, twine,</div>
    <div class="verse indent0">And spin a new cable, and try it again,</div>
    <div class="verse indent0">And settle our bargains of cotton and grain,</div>
    <div class="verse indent6">With a line, line, line,—</div>
    <div class="verse indent11">A line that will never go wrong.</div>
</div>
</div>
</div>

<p class="nind">Receive, etc.</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To K. B. Litchfield, Esq.</span></p>

<p class="right"><i>Glenlair, 23d Sept. 1857.</i></p>

<p>I have just returned from the remote Highlands, and have met all the
Indian news on my way, and found your letter at home. I suppose it is
best to say what I think to you, rather than what I feel, for that is
confusion. You may well ask “Why?” I myself see a horrible despair
waiting for us if we knew or even paid enough attention to things
happening continually. Is it merely a reaction from our animal life
that makes us comfortable again? or excitement of some other kind? or
defective sympathy? No; I think real sympathy is the very thing we
want, and we suffer more from want of union than from any other cause.
I cannot make the thing clearer either to you or to myself; but as I
was coming home and expecting bad news, I thought of dead and absent
friends, and how they endeavoured<span class="pagenum" id="Page_281">[Pg 281]</span> when alive to make themselves known
to us, and how the impression they had left in us remained untouched
and sacred during their absence. Then I thought of those who had left
the clearest impression on me,—how some were dead, and their character
never known or proved to the world, and their deeds never done as
they would have been if they had lived. But this secret knowledge is
strengthening as well as sad, if our brother’s life is an inheritance
to us when he falls, and we rise (like Triamond) to fight his battle as
well as our own.</p>

<p>Do not understand all this as a theory. I wish to say that it is in
personal union with my friends that I hope to escape the despair which
belongs to the contemplation of the outward aspect of things with human
eyes. Either be a machine and see nothing but “phenomena,” or else try
to be a man, feeling your life interwoven, as it is, with many others,
and strengthened by them whether in life or in death. You will say
that this is what a man writes after a course of healthy exercise and
boisterous health, when he suddenly feels a pull on his soul, but his
body goes on as before. But though my knowledge of our friend does not
reach so far back as yours, there is a great part of all my thoughts
which bears the mark of his honest handling, for to me he was most
liberal in communication, so that all manner of thought became our
common property. When he was ill at Cambridge, my father, who was then
rather better, was very much concerned about him, so that afterwards,
when he was worse himself, he would speak of him from recollections of
what I had told him before. So I used to think of them together,—the
one guiding me along by wise plans in the ways of freedom, and the
other supplying the energy of speculative honesty and the freshness
of a younger mind. And is all gone? Certainly not, look at it as you
will. I am not trying to persuade myself into hope. I find I cannot do
otherwise. I have been miserable about these very things when there
seemed no particular reason at the time, and then, when the time was
worst, felt well; but that must be one’s own personal affair. If we
can hear the General’s voice<span class="pagenum" id="Page_282">[Pg 282]</span> we will rise in our tears and go to our
places, having conquered ourselves. Long ago I felt like a peasant in a
country overrun with soldiers, and saw nothing but carnage and danger.
Since then I have learned at least that some soldiers in the field die
nobly, and that all are summoned there for a cause.</p>

<p>I am very sorry for India, and for you and poor Mrs. Pomeroy. She had a
stake in him that none of us could have.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>Glenlair, 28th September 1857.</i></p>

<p>My dear friend Pomeroy died at Ghazeepore about 1st August, from
overwork and forced marches. He was a civilian, and appointed assistant
magistrate at Azinghur. He and the rest of the civilians proceeded
thither with about 400 men. When they got there they fought about
2000 insurgents in two feet of water, and beat them off three times.
Pomeroy volunteered to take in a wounded man (Lieut. Lewis, 65 N. I.)
to Ghazeepore, when no one else would venture to go. He stayed there a
few days, but was unwell Then he went back to his post at Azinghur for
about a week. On the news of the Dinapore mutiny they were all ordered
in, and made a forced march on Ghazeepore, forty miles.</p>

<p>He died soon after getting in.</p>

<p>Of all the men I have known he was the most likely to have done
something for India, I never knew a man more able to see his way
through difficulties, more respected by men of all classes, or more
determined that duty should be done whatever might happen. We have one
comfort for ourselves, that few men have made themselves more open to
their friends, so that many men may receive something of his spirit,
though he is cut off before strangers could take example by his deeds.</p>


<p class="nindc"><span class="allsmcap">To E. B. Litchfield, Esq.</span></p>

<p class="right"><i>Glenlair, 15th October 1857.</i></p>

<p>I was glad S. sent me the letter. Remember that<span class="pagenum" id="Page_283">[Pg 283]</span> besides all the danger
and distance from friends, there was the fever, of which he had already
long experience, and which in such times he knew to be as inconvenient
to his friends as himself. But it is no use saying this and that. Some
men redeem their characters by their deeds, and we praise them. Those
that merely show their character by their deeds should be remembered,
not praised; and a complete true man will live longest in the memory,
and I cannot but think will be less changed in reality, than one who
has doubtfully struggled with duplicity in his constitution, and has
walked with hesitation, though along a good path. I know that both do
deny and renounce themselves in favour of duty and truth, as they come
to see them; and as they come to see how goodness, having the knowledge
of evil, has passed through sorrow to the highest state of all, they
accept it as a token that they have found their true head and leader,
and so, with their eyes on him, they complete the process called the
knowledge of Good and Evil, which they commenced so early and so
ignorantly.</p>

<p>Now, what the “completion of the process” is I cannot conceive, but
I can feel the difference of Good and Evil in some degree, and I can
conceive the perception of that difference to grow by contemplating
the Good till the confusion of the two becomes an impossibility. Then
comes the mystery. I have memory and a history, or I am nothing at all.
That memory and history contain evil, which I renounce, and must still
maintain that I was evil. But it contains the image of absolute good,
and the fight for it, and the consciousness that all this is right.</p>

<p>So there the matter lies, a problem certain of solution....</p>

<p>I am grinding hard at Saturn, and have picked many holes in him, and am
fitting him up new and true. I am sure of most of him now, and have got
over some stumbling-blocks which kept me niggling at calculations two
years.</p>

<p>I am to have some artisans as weekly students this winter.</p>
</div>

<p><span class="pagenum" id="Page_284">[Pg 284]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Lauriston Lodge,<br>
Edinburgh, 25th October 1857.</i></p>

<p>... As to collecting memorials, that is a thing to do faithfully if
at all. No man can write himself down wholly at once, so no one thing
will give a complete autograph of the man. As for anecdotes, they are
to be tolerated as the roughest way of giving to the public sketches of
public men; but they will satisfy no private friend, not even him from
whose memory they are drawn.</p>

<p>But if any essays (I know some that were not read aloud to any
particular people, but were written by himself for himself) or anything
else of his are to be had, they might be given to Mrs. Pomeroy with
what explanation we could give, and so (not hastily but) when times
occur, she might continue to learn more of him and his honestly fought
and thoroughly conquered and well secured path through a land of
shadows, where friends and foes seemed to exchange appearances, so
that honesty and sincerity had parted with order and reverence, and
indecision had passed for conscientiousness, and enquiry after truth
had been taken for infidelity. A sad world to seek for truth in under
any man’s guiding. The exact point at which this progress has been
interrupted may be disputed by men, but they have no jurisdiction, and
are ignorant even of their own true faith till something bring it into
action.</p>

<p>I could not conceive of any one undertaking to <i>write</i> a
<i>memoir</i>. I am fully satisfied of the impossibility of that, with
respect to any <i>young</i> man. The journal of voyage, which was meant
to be read, is far the best memorial, and it is a very good one indeed
for his mother and friends, for it is so wonderfully open-hearted
and unaffected. I appreciate these qualities on account of the force
which it requires for me to say or do anything according to nature,
especially in ordinary circumstances.</p>

<p>This spring I read a great deal of MS. at home, which gave me much
light about my father and his dealings with various people. There were
journals of travels and adventures<span class="pagenum" id="Page_285">[Pg 285]</span> from twelve years of age to thirty,
and many other things. Well, I have found that reading profitable in
making me remember him better, and honour him more, and understand
better how he ordered his life, and who were his friends. That is the
use and intent of keeping anything belonging to our friends. I do not
intend to advertise these things for public sale, for I doubt whether
the public would be better, and I would be worse.</p>
</div>

<p>The following letter from Pomeroy to his mother, of which a copy was
found in Maxwell’s handwriting, throws further light on the character
of the man whose loss was felt so deeply:—</p>

<div class="blockquot">

<p class="right"><i>Azingurh, July 28, 1857.</i></p>

<p><span class="allsmcap">My dear Mother</span>—I sit down to write to you in rather a solemn
mood, partly owing to my having received yesterday a note from Mrs. W.
H. T., which I enclose, and partly because that, in this part of India,
and particularly in these outlying stations, with no European soldiers,
the lives of Englishmen more clearly lie in God’s hand than on most
occasions in our sojourn on earth.</p>

<p>I have told you in former letters that I volunteered to go with any
civilians who reoccupied a station in the Benares district. I did this
completely of my own responsibility, and whether I was right or wrong
God alone knows. I was then in excellent health, and I could not bear
to think that I should be absolutely doing nothing in a safe station,
when an additional European, who could ride or use firearms, even if
he could do nothing else, was not utterly useless to the brave men who
were going out in order to make, persuade, or enable the natives to
cultivate their fields, during the three important months of the year,
and so avoid a famine.</p>

<p>Mr. Tucker responded immediately to my volunteering, and appointed
me “Assistant Magistrate” of Azingurh, with nearly —— a month. You
know the delay in going, and that I was ill during that time. We left
(Benares) on the 16th, and arrived here on the 18th. The march, which
I performed partly on horseback and partly in my buggy, did not do
me any harm, but the fatigue, excitement, and varied feelings caused
by an affray with a body of natives, led by Oude Zemindars, in which
we were finally victorious, after five hours of half fighting (not
that I fought much, but I was on horseback most of the time), rather
weakened me. Then there was a wounded man to be taken into Ghazipoor,
and of those whose duty it was to accompany him nobody who could be
spared could be induced to go, so I volunteered,<span class="pagenum" id="Page_286">[Pg 286]</span> whereby I pleased
him, poor fellow, and his fellow-officers very much, and I believe I
was of use to him. I hoped to have got three days rest at Ghazipoor,
but the excitement of seeing new faces, and giving all my news over
and over again, and trying to soothe angry officers whose corps had
been abused, and explaining mistakes, etc. etc., made the rest very
ambiguous; and the journey back knocked me up. I was very feverish
last night, but Home (the magistrate) took tremendous care of me, put
my bed next his, and got me limes and honey, and everything he could
get for cough or fever. To-day I am a great deal better, but still on
rice-milk and chicken-broth, and as I have no duties but a share in the
mess management, I get lots of lying down, but no absolute rest, as
the nine of us, civil and military, live in one six-roomed bungalow.
Don’t imagine that nine (only) is the number walking about inside:
everybody’s bearer except mine and another’s, I believe, walk about
like tame dogs, bringing their masters’ slightest wants, for few think
of getting anything for themselves, even from across the room.</p>

<p>We have a very grave piece of intelligence from the neighbourhood of
Legowlie, the headquarters of the 12th Irregular Cavalry. A native
brought a report to a gentleman living 8 miles from Legowlie, that on
the 24th of July the men of the 12th who were there left the station,
and that the commanding officer (Major Holmes) and his wife, and the
Doctor (Gardner), had been killed. This news has at length reached
us, whom it concerns nearly, as one hundred of the same regiment are
here. On the other side, it is to be said that all the principal
native officers were absent from Legowlie, two being here now, and one
elsewhere, so that the mutiny may not spread, and we have no treasure
here to tempt them, and the Hindu Sepoys are not likely to join them,
though their hatred of Musselmans has two or three times given way to
their desire for plunder or love of Christian blood. Our position is
precarious, but I can look it straight in the face, and in four days or
less the crisis will, I hope, have passed.</p>

<p>Herne is a Poole man, with an uncle there of the name of Biddel. His
wife is in the hills, and he hears from her now pretty often, but there
is a month’s interval between the departure and arrival of her letters.
He is a decidedly religious man of a very genuine stamp. He read us
last Sunday that grand sermon the Bishop of Calcutta preached towards
the end of June. You should get it if it is to be had in England.</p>

<p>We are daily expecting to hear of the safety of Lucknow. Poor Mrs.
Cooper! She and her children must have been living in cellars for the
last month, to be out of the way of cannon balls: and to live in a
cellar in India must be dreadfully trying. If any children survive it
will be a mercy,—a mercy indeed if they escape the awful, horrible
fate of the ladies of Cawnpore. Mrs. Cave, whom I mentioned in my
Journal, was, I fear, at the latter place. As a Madras fusilier said to
me (in a broad Irish accent), “I don’t care what they do to the likes
of me—but the women—and Ladies too!”</p>
</div>

<p><span class="pagenum" id="Page_287">[Pg 287]</span></p>

<div class="blockquot">

<p>Poor T—— writes me letters intended to be cheery, but really awfully
dismal. She bears up bravely, and thinks no one sees her sorrow.</p>

<p>We have a picture in the house that belonged to some one who fled from
this on the 3d June. It is called “Woman’s Mission.” You must have seen
it in the print-shop windows,—two Scutari volunteer nurses attending
a wounded man. A pathetic picture suits our feelings. All but two, I
believe, have either wife or lover to think of; but sorry should I or
any be that any woman should be with us. Poor Batty married a very
short time ago, and had to part from his Bride almost immediately, and
send her to Calcutta. He, too, has lost a Brother.</p>

<p>I hope the English papers will have better and truer accounts than the
Indian generally have; but you cannot follow events without some good
map, like Allen’s £2: 2s. one. So don’t try; it will only puzzle you,
and the <i>Times</i> will give you the pith of the matter. The fire
is now really being extinguished, though it will be long before stray
points cease to flare up and burn those within their range.</p>

<p>There are two hundred of the King of Nepaul’s Goorkas on the march to
form part of our garrison, and on those we think we can really depend.
They are very brave, and more than a match for Sepoys, and are more
different in race and manners from the Hindus than we are, and very
different in religion.</p>

<p>Urgent requisitions have been sent to Ghazipoor and Benares for
Europeans, which may now at length be answered.</p>

<p>With regard to Mrs. T——, whom I was nearly forgetting in my
egotism, I hope—if she has by the time this reaches you visited
Cheltenham—that you have seen her. What a comfort it must be to her,
poor thing, to think that she made him face those thoughts he had
shunned and shirked so long. She left by last mail, so she will have
been a fortnight in England or Ireland when this reaches you. I hope
to write you a letter by Bombay and Marseilles of a later date, and
to Editha by Calcutta and Marseilles; so that this letter, which I
confess is an alarmist one, will not arrive till you know the Event. I
have written what I have that you may see I know my danger, and have,
I hope, right feelings under it.—I remain, my very dear mother, your
most affectionate son,</p>

<p class="right"><span class="allsmcap">Robert Henry Pomeroy.</span></p>


<p class="nindc"><span class="allsmcap">To Prof. Maxwell from Prof. G. G. Stokes.</span></p>

<p class="right"><i>School of Mines,<br>
Jermyn Street, 7th November /57.</i></p>

<p>I have just received your papers on a dynamical top, etc., and the
account of experiments on the perception of colour. The latter, which
I missed seeing at the time when it was published, I have just read
with great interest. The results<span class="pagenum" id="Page_288">[Pg 288]</span> afford most remarkable and important
evidence in favour of the theory of three primary colour-perceptions, a
theory which you, and you alone, so far as I know, have established on
an exact numerical basis.</p>


<p class="nindc"><span class="allsmcap">To Prof. J. C. Maxwell from Prof. Faraday.</span></p>

<p class="right"><i>Albemarle Street,<br>
7th November 1857.</i></p>

<p>I have just read and thank you heartily for your papers. I intended
to send you copies of two of mine. I think I have sent them, but do
not find them ticked off. So I now send copies, not because they are
assumed as deserving your attention, but as a mark of my respect, and
desire to thank you in the best way that I can.</p>


<p class="nindc"><span class="allsmcap">To Prof. J. C. Maxwell from Prof. Tyndall.</span></p>

<p class="right"><i>Royal Institution,<br>
7th November 1857.</i></p>

<p>I am very much obliged to you for your kind thoughtfulness in sending
me your papers on the Dynamical Top and on the Perception of Colour, as
also for your memoir on Lines of Force, received some time ago. I never
doubted the possibility of giving Faraday’s notions a mathematical
form, and you would probably be one of the last to deny the possibility
of a totally different imagery by which the phenomena might be
represented.<a id="FNanchor_201" href="#Footnote_201" class="fnanchor">[201]</a></p>


<p class="nindc"><span class="allsmcap">To Prof. Maxwell from Prof. Faraday.</span><a id="FNanchor_202" href="#Footnote_202" class="fnanchor">[202]</a></p>

<p class="right"><i>Albemarle Street, London,<br>
13th November 1857.</i></p>

<p>If on a former occasion I seemed to ask you what you<span class="pagenum" id="Page_289">[Pg 289]</span> thought of my
paper, it was very wrong; for I do not think any one should be called
upon for the expression of their thoughts before they are prepared, and
wish to give them. I have often enough to decline giving an opinion
because my mind is not ready to come to a conclusion, or does not wish
to be committed to a view that may by further consideration be changed.
But having received your last letter, I am exceedingly grateful to you
for it, and rejoice that my forgetfulness of having sent the former
paper on conservation has brought about such a result. Your letter is
to me the first intercommunication on the subject with one of your mode
and habit of thinking. It will do me much good, and I shall read and
meditate it again and again.</p>
</div>

<div class="blockquot">

<p>I daresay I have myself greatly to blame for the vague use of
expressive words. I perceive that I do not use the word “force” as you
define it, “the tendency of a body to pass from one place to another.”
What I mean by the word is the <i>source</i> or <i>sources</i> of
all possible actions of the particles or materials of the universe;
these being often called the <i>powers</i> of nature when spoken of in
respect of the different manners in which their effects are shown. In a
paper which I have received at the moment from the <i>Phil. Mag.</i>,
by Dr. Woods, they were called the “forces, such as electricity, heat,
etc.” In this way I have used the word “force” in the description of
gravity which I have given as that expressing the received idea of its
nature and source; and such of my remarks as express an opinion or are
critical apply only to that sense of it. You may remember I speak to
labourers like myself, experimentalists on force generally, who receive
that description of gravity as a physical truth, and believe that it
expresses all, and no more than all, that concerns the nature and
locality of the power. To these it limits the formation of their ideas,
and the direction of their exertions, and to these I have endeavoured
to speak; showing how such a thought, if accepted, pledged them to a
very limited and probably erroneous view of the cause of the force,
and to ask them to consider whether they should not look (for a time
at least) to a source in part external to<span class="pagenum" id="Page_290">[Pg 290]</span> the particles. I send you
two or three old printed lines <i>marked</i>, relating to this point.
To those who <i>disown</i> the definition or description as imperfect,
I have nothing to urge, as there is then probably no real difference
between us.</p>

<p>I hang on to your words because they are to me weighty, and where you
say, “I for my part can not realise your dissatisfaction with the
law of gravitation, provided you conceive it according to your own
principles,” they give me great comfort. I have nothing to say against
the law of action of gravity. It is against the law which measures
its total strength as an inherent force that I venture to oppose my
opinion; and I must have expressed myself badly (though I do not find
the weak point) or I should not have conveyed any other impression.
All I wanted to do was to move men (not No. I. but No. II.) from the
unreserved acceptance of a principle of physical action which might be
opposed to natural truth. The idea that we may possibly have to connect
<i>repulsion</i> with the lines of gravitation force (which is going
far beyond anything my mind would venture on at present, except in
private cogitation), shows how far we may have to depart from the view
I oppose.</p>

<p>There is one thing I would be glad to ask you. When a mathematician
engaged in investigating physical actions and results has arrived at
his conclusions, may they not be expressed in common language as fully,
clearly, and definitely as in mathematical formulæ? If so, would it
not be a great boon to such as I to express them so?—translating
them out of their hieroglyphics, that we also might work upon them by
experiment. I think it must be so, because I have always found that you
could convey to me a perfectly clear idea of your conclusions, which,
though they may give me no full understanding of the steps of your
process, give me the results neither above nor below the truth, and
so clear in character that I can think and work from them. If this be
possible, would it not be a good thing if mathematicians, working on
these subjects, were to give us the results in this popular, useful,
working state, as well as in that which is their own and proper to them?</p>
</div>

<p><span class="pagenum" id="Page_291">[Pg 291]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To H. P. Droop, Esq.</span></p>

<p class="right"><i>129 Union Street, Aberdeen,<br>
14th November 1857.</i></p>

<p>I am very busy with Saturn on the top of my regular work. He is all
remodelled and recast, but I have more to do to him yet, for I wish
to redeem the character of mathematicians, and make it intelligible.
I have a large advanced class for Newton, physical astronomy, the
electric sciences, and high optics. What is your department by the way?</p>

<p>I have also a mechanics’ class in the evening, once a week, on
mechanical principles, such as doctrine of lever work done by machines,
etc. So I have 15 hours a week, which is a deal of talking straight
forward.</p>

<p>I am getting several tops (like the one I had at Cambridge) made here
for various parties who teach rigid dynamics.</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>127 Union Street, Aberdeen,<br>
26th November 1857.</i></p>

<p>The enclosed letters came from Mrs. Pomeroy to me. I think they are,
one of them at least, yours. I doubt of the smaller one, but you will
know. They seem dropping in still on poor Mrs. Pomeroy. Even ordinary
returned letters are strange things to read again, as if you had been
talking on when everybody had gone away.</p>

<p>I got your letter of the 6th. I have been grinding so hard ever since I
came here that I left many letters unanswered. When I have time I shall
write to you, and meanwhile only thank you for your letter.</p>

<p>I am at full college work again. A small class with a bad name for
stupidity, so there was the more field for exciting them to more
activity. So I have got into regular ways, and have every man <i>viva
voce'd</i> once a week, and the whole class examined in writing on
Tuesdays, and roundly and sharply abused on Wednesday morning; and lots
of exercises which I find it advantageous to brew myself overnight.</p>
</div>

<p><span class="pagenum" id="Page_292">[Pg 292]</span></p>

<div class="blockquot">

<p>Public Opinion here says that what our colleges want is inferior
professors, and more of them for the money. Such men, says P. O.,
would devote their attention more to what would pay, and would pay
more deference to the authority of the local press than superior or
better paid men. Therefore, although every individual but one who came
before the Commission was privately convinced that the best thing in
itself would be to fuse our two institutions into one, with one staff
of teachers, yet they all agreed that the public opinion of the whole
was the opposite of the private opinion of each, and that more harm
than good would result from adopting the course which seemed good to
the members, but not to the body, of the public. So the battle rages
hot between Union (of Universities only) and Fusion (of classes and
professors). Almost all the professors in Arts are fusionists, and
all the country south of the Dee, together with England and the rest
of Europe and the world, but Aberdeen (on the platform), is Unionist,
and nothing else is listened to at public meetings, though perhaps
a majority of those present might be fusionists. Such is Public
Opinion; but we are all quiet again now, and I am working at various
high matters, for I have a very good class for Physical Astronomy,
Electricity, and Undulations, etc., and I want to do them justice.</p>

<p>I have had a lot of correspondence about Saturn’s Rings, Electric
Telegraph, Tops, and Colours. I am making a Collision of Bodies’
machine, and a model of Airy’s Transit Circle (with lenses), and I am
having students’ teas when I can. Also a class of operatives on Monday
evening, who do better exercises than the University men about false
balances, Quantity of Work, etc.</p>


<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>129 Union Street, Aberdeen,<br>
28th Nov. 1857.</i></p>

<p>I had a letter from Willy to-day about jet pumps to be made for real
drains, but not saying anything about the Professorship of Engineering.</p>

<p>I have been pretty steady at work since I came. The<span class="pagenum" id="Page_293">[Pg 293]</span> class is small and
not bright, but I am going to give them plenty to do from the first,
and I find it a good plan. I have a large attendance of my old pupils,
who go on with the higher subjects. This is not part of the College
course, so they come merely from choice, and I have begun with the
least amusing part of what I intend to give them. Many had been reading
in summer, for they did very good papers for me on the old subjects at
the beginning of the month. Most of my spare time I have been doing
Saturn’s Rings, which is getting on now, but lately I have had a great
many long letters to write,—some to Glenlair, some to private friends,
and some all about science.... I have had letters from Thomson and
Challis about Saturn—from Hayward of Durham University about the brass
top, of which he wants one. He says that the Earth has been really
found to change its axis regularly in the way I supposed. Faraday has
also been writing about his own subjects. I have had also to write
Forbes a long report on colours, so that for every note I have got I
have had to write a couple of sheets in reply, and reporting progress
takes a deal of writing and spelling....</p>

<p>I have had two students’ teas, at which I am becoming expert. I have
also indulged in long walks, and have seen more of the country. The
evenings are beautiful at this season. There have been some very fine
waves on the cliffs south of the Dee.</p>


<p class="nindc"><span class="allsmcap">To the Rev. L. Campbell.</span></p>

<p class="nindc"><i>(On taking Priest's Orders).</i></p>

<p class="right"><i>129 Union Street, Aberdeen,<br>
22d Dec. 1857.</i></p>

<p>I take for granted that sometime on Sunday last you entered the second
of the ecclesiastical transformations. May your life and doctrine set
forth God’s glory, and be the means of setting forward the salvation
of all men! Some of my friends think that the separation to a “holy
function” puts a man into an artificial position with respect to the
conduct of his thoughts, words, and acts, and that he is<span class="pagenum" id="Page_294">[Pg 294]</span> immersed in a
professional atmosphere,—a world, in fact, differing from the world of
business or of fashion only in the general colouring of its scenery. It
has always seemed to me that men who have fallen into this “religious
world” have completely failed in getting into the Church, seeing that
the Church professes to be an escape from the world, and the only
escape. And what holds of the Church ought to hold of the clergy
preeminently. So far my theory of the Church not being a clerical
world. How I believe it not only as a theory, but as a fact, that a man
will find the thing so if he will try it himself.</p>

<p>The restraints and professional stiffness of sentiment are not made for
lawful members, but for those whom the truth has not yet made entirely
free. I have to tell my men that all they see, and their own bodies,
are subject to laws which they cannot alter, and that if they wish
to do anything they must work according to those laws, or fail, and
therefore we study the laws. You have to say that what men are and the
nature of their actions depends on the state of their wills, and that
by God’s grace, through union with Christ, the contradictions and false
action of those wills may be settled and solved, so that one way lies
perfect freedom, and the other way bondage under the devil, the world,
and the flesh, and therefore you entreat them to give heed to the
things which they have heard.</p>

<p>How, no man accuses me of being stiff, because I try to make what I
say precise. Everybody knows that I believe it, whether I am stating
a well-established law or only a half-verified conjecture. And I
think that you have fully more right to be respected, inasmuch as
the nature of your message implies the duty of <i>preaching</i> it,
and the convictions that may be arrived at are as cogent, being more
<i>clear</i>, if less <i>distinct</i>, than scientific truths.</p>

<p>I have been reading Butler’s <i>Analogy</i> again, specially with
reference to obscurities in style and language, and also to distinguish
the merits of the man, and what habits of thought they depended on.
Also Herschel’s Essays, of which read that on Kosmos, and Froude’s
History. One night I read<span class="pagenum" id="Page_295">[Pg 295]</span> 160 pages of Buckle’s <i>History of
Civilisation</i>—a bumptious book, strong positivism, emancipation
from exploded notions, and that style of thing, but a great deal of
actually original matter, the true result of fertile study, and not
mere brain-spinning. The style is not refined, but it is clear, and
avoids fine writing. Froude is very good that way, though you can see
the sort of pleasure that a University man takes in actually realising
what he has talked over at Hall about showing what England was in the
middle ages, and transfusing himself, style and all, thereinto, that
his friends may see. A solitary student never does that sort of thing,
nor can he appreciate the graces of imitation. I wish Froude would
state whether he translates, and from what language, in each document.</p>

<p>I am still at Saturn’s Rings. At present two rings of satellites are
disturbing one another. I have devised a machine to exhibit the motions
of the satellites in a disturbed ring; and Ramage is making it, for
the edification of sensible image worshippers. He has made four new
dynamical tops, for various seats of learning.</p>

<p>I have set up a model of Airy’s Transit Circle, and described it to
my advanced class to-day. That institution is working well, with a
steady attendance of fourteen, who have come of their own accord to do
subjects not required by the College, <i>and the dryest first</i>.</p>

<p>To the present time we have been on Newton’s <i>Principia</i> (that
is, Sects, <span class="allsmcap">I.</span> <span class="allsmcap">II.</span> <span class="allsmcap">III.</span>, as they are,—and
a general view of the Lunar Theory, and of the improvements and
discoveries founded on such inquiries). Now we go on to Magnetism,
which I have not before attempted to explain.</p>

<p>The other class is at two subjects at once. Theoretical and
mathematical mechanics is the regular subject, but two days a week
we have been doing principles of mechanism, and I think the thing
will work well. We now go on to Friction, Elasticity, and Breakage,
considered as subjects for experiment, and as we go on we shall take
up other experimental subjects germane to the regular course. I am
happy in the knowledge of a good tinsmith, in addition to a smith,<span class="pagenum" id="Page_296">[Pg 296]</span> an
optician, and a carpenter. The tinsmith made the Transit Circle.</p>

<p>College Fusion is holding up its head again under the fostering care
of Dr. David Brown (father to Alexander of Queen’s).<a id="FNanchor_203" href="#Footnote_203" class="fnanchor">[203]</a> Know all men
I am a Fusionist, and thereby an enemy of all the respectable citizens
who are Unionists (that is, unite the three learned faculties, and
leave double chairs in Arts). But there is no use writing out their
theory to you. They want inferior men for professors—men who will find
it their interest to teach what will pay to small classes, and who will
be more under the influence of parents and the local press than more
learned or better paid men would be in a larger college.</p>
</div>

<p>I send you a description of the Murtle Lecture delivered in our Public
School:—</p>

<div class="blockquot">

<p>To those who admire the genius of the bard who sang of The Dee, the
Don, Balgownie Brigg’s black wall, the following lines will be welcome
from their resemblance to the opening of one of his poems:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Know ye the Hall where the birch and the myrtle</div>
    <div class="verse indent2">Are emblems of things half profane, half divine,</div>
    <div class="verse indent0">Where the hiss of the serpent, the coo of the turtle,</div>
    <div class="verse indent2">Are counted cheap fun at a sixpenny fine?</div>
    <div class="verse indent0">Know ye the Hall of the pulpit and form,</div>
    <div class="verse indent0">With its air ever mouldy, its stove never warm;</div>
    <div class="verse indent0">Where the chill blasts of Eurus, oppressed with the stench,</div>
    <div class="verse indent0">Wax faint at the window, and strong at the bench;</div>
    <div class="verse indent0">Where Tertian and Semi are hot in dispute,</div>
    <div class="verse indent0">And the voice of the Magistrand never is mute;</div>
    <div class="verse indent0">Where the scrape of the foot and the audible sigh</div>
    <div class="verse indent0">In nature though varied, in discord may vie,</div>
    <div class="verse indent0">Till the accents of Wisdom are stifled and die;</div>
    <div class="verse indent0">Where the Bajuns are dense as the cookies they chew,</div>
    <div class="verse indent0">And all save the Regents have something to do;—</div><span class="pagenum" id="Page_297">[Pg 297]</span>
    <div class="verse indent0">’Tis our Hall of Assembly, our high moral School,</div>
    <div class="verse indent0">Must its walls never rest from the bray of the fool?</div>
    <div class="verse indent0">Oh vain as the prospect of summer in May</div>
    <div class="verse indent0">Are the lessons they learn and the fines that they pay.</div>
  </div>
</div>
</div>

<p class="nind">
All the public discipline, fines, etc., are arranged and levied at the
Public School. The Bajuns, Semis, Tertians, and Magistrands are the
four years of men. The Regents are the four Professors—Greek, Nat.
Hist., Nat. Phil., and Mor. Phil.</p>

<p>Gaiety is just beginning here again. Society is pretty steady in
this latitude,—plenty of diversity, but little of great merit or
demerit,—honest on the whole, and not vulgar.... No jokes of any kind
are understood here. I have not made one for two months, and if I feel
one coming I shall bite my tongue. I shall write as soon as I hear
again from you.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>129 Union Street, 20th Jan. 1858.</i></p>

<p>I should have written to thank you for the little book,<a id="FNanchor_204" href="#Footnote_204" class="fnanchor">[204]</a> but I
think you will prefer my thanks now that I have read it.</p>
</div>

<div class="blockquot">

<p>What is the English book that says <i>dasz Wahrheit Offenbarung mache,
nicht Offenbarung Wahrheit</i>?</p>

<p>The marrow of the book lies in the man’s being a Fremdling, conscious
of the shell that surrounds him and divides him from others, and able
neither to live in it nor to break it. But the shell is only the outer
surface of a minute drop of fluid, impenetrable because minute, and
arising from molecular forces in himself. But he meets with another
drop, confined to one spot it is true, but a great deal larger than
himself. He coalesces, and both are now larger and more fluid than
before. Note that though he was movable and active, she fixed and
ill, she knew the Hofrath; he knew no one, unless perhaps his mother.
People differ in their need of knowing others, and in their power of
conquering that knowledge. I have been reading<span class="pagenum" id="Page_298">[Pg 298]</span> Lavater and his life.
He needed to know people; he was a man of a refined and tender spirit,
but it was vigorous, although not very massive or powerful, and he
came to know people, made friends, a few enemies, stuck to his work,
and lived happy. Other men have lived well and done good without even
wishing to burst the shell of separate existence, feeling it like the
natural garment of a personal being.</p>

<p>How I find that the transfusive tendency is not identical with personal
attraction (using the last two words in anything but their newspaper
sense). There are some people whom I feel disposed to love, honour, and
obey, though in many things I may dislike them, and may have no wish
to have a complete fusion of thought and feeling with them. There are
others who are easily sympathised with, and open out willingly, but
do not thereby acquire the power and authority which the first have
without seeking it. Both is best, but of the two the first is more
permanent than the second.</p>

<p>To return to the book, the different sex of the parties is treated as
an accident, but by the effect on the man it certainly is not, neither
is the effect of it insensible on the lady. She treats his statements
with more reverence than is their due, as coming from a man, and, I
think, fails entirely in framing a scheme for coalescing, without
entering on that state of which marriage is the symbol, even though by
accident there may be checks which may enable or compel the parties to
stop short. It is not society that does it; it is a law in us. How I
must stop, or I shall be teaching my grand-mother to suck eggs.</p>

<p>Let me try my hand on that worthy relative in her professional as
well as private capacity, with respect to the Lilleshall sermon. I am
sure you will be able, with pains, to put anything you have sure hold
of before your hearers; but there are certain subjects which, after
being handled by some of our writers, get coated over with language
so tenacious that it is difficult to recognise them in plain clothes,
so that you become like the “lovely song of one that hath a pleasant
voice.”</p>
</div>

<p><span class="pagenum" id="Page_299">[Pg 299]</span></p>

<div class="blockquot">

<p>Now it is good to learn wisdom wherever it is to be found, but in
teaching it, it must be made light, wholesome, and digestible, by
being stripped of all vagueness and wordiness, and refitted with
illustrations and conceptions carefully adapted to the hearers. Not but
what the other method is pleasant to listen to, and not without profit
(if taken with salt); but there are good books, out of which you may
preach very bad sermons, with which your people may be as delighted as
Mary Anne was with Faraday’s lecture, of which she gave an account to
<i>Punch</i>.</p>

<p>I find my principal work here is teaching my men to avoid vague
expressions, as “a certain force,” meaning uncertain; <i>may</i>
instead of <i>must</i>; <i>will be</i> instead of <i>is</i>;
<i>proportional</i> instead of <i>equal</i>....</p>

<p>As to yourself, I do not know whether college or parish work is best
for you to be set to. I am not sorry about the rich people. They
require you as much as the poor. But you must find out your own spirit,
and what you were made for, and not steer by men either towards one man
or from another.</p>

<p>Now I sent you a libellous description of our public school here last
letter. Last week I was walking with the tune of the “Lörelei” running
in my head, and it set itself into a “kind of allegory.” The words are
very crude, but that is the way they came together. I profess myself
responsible for most things I say, but less for this than for most:—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Alone on a hillside of heather,</div>
    <div class="verse indent2">I lay with dark thoughts in my mind,</div>
    <div class="verse indent0">In the midst of the beautiful weather</div>
    <div class="verse indent2">I was deaf, I was dumb, I was blind.</div>
    <div class="verse indent0">I knew not the glories around me,</div>
    <div class="verse indent2">I thought of the world as it seems,</div>
    <div class="verse indent0">Till a spirit of melody found me,</div>
    <div class="verse indent2">And taught me in visions and dreams.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">For the sound of a chorus of voices</div>
    <div class="verse indent2">Came gathering up from below,</div>
    <div class="verse indent0">And I heard how all Nature rejoices,</div>
    <div class="verse indent2">And moves with a musical flow.</div><span class="pagenum" id="Page_300">[Pg 300]</span>
    <div class="verse indent0">O strange! we are lost in delusion,</div>
    <div class="verse indent2">Our ways and doings are wrong,</div>
    <div class="verse indent0">We are drowning in wilful confusion</div>
    <div class="verse indent2">The notes of that wonderful song.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But listen, what harmony holy</div>
    <div class="verse indent2">Is mingling its notes with our own!</div>
    <div class="verse indent0">The discord is vanishing slowly,</div>
    <div class="verse indent2">And melts in that dominant tone.</div>
    <div class="verse indent0">And they that have heard it can never</div>
    <div class="verse indent2">Return to confusion again;</div>
    <div class="verse indent0">Their voices are music for ever,</div>
    <div class="verse indent2">And join in the mystical strain.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">No mortal can utter the beauty</div>
    <div class="verse indent2">That dwells in the song that they sing;</div>
    <div class="verse indent0">They move in the pathway of duty,</div>
    <div class="verse indent2">They follow the steps of their King.</div>
    <div class="verse indent0">I would barter the world and its glory,</div>
    <div class="verse indent2">The vision of joy to prolong,</div>
    <div class="verse indent0">Or to hear and remember the story</div>
    <div class="verse indent2">That lies in the heart of their song.</div>
  </div>
</div>
</div>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>129 Union Street, 31st January 1858.</i></p>

<p>Thank you for your letter, so kind and so speedy. Now there are two of
us, and I have that knowledge which is better than all advice. Not that
I undervalue the advice at all, only the sense of unity between us is
the main thing, whether we keep up correspondence or not. And I know
that my friends are <i>ipso facto</i> your’s, and your’s mine, so that
we are a large and influential body....</p>

<p>But don’t suppose that I intend to make you my confessor. It would not
be just to you, for I do not like being confessed to myself; and I
think every one should bear his own burden, though willing to lighten
that of others. Besides, confession brings into set words and distinct
outlines, doubtful suspicions and half-formed thoughts, which would
fade at once if they were not stirred up.</p>
</div>

<p><span class="pagenum" id="Page_301">[Pg 301]</span></p>

<div class="blockquot">

<p>To do the thing adequately, without extenuation, voluntary
exaggeration, or colouring of any kind, is far beyond human power.
The consciousness of the presence of God is the only guarantee
for true self-knowledge. Everything else is mere fiction, fancy
portraiture,—done to please one’s friends or self, or to exhibit one’s
moral discrimination at the expense of character.</p>

<hr class="r5">

<p>And now be assured that I feel like Spenser’s “Diamond,” who had
“Priamond’s” spirit in him as well as his own. There is another human
aid that is with me. The memory of my father is a great help to being
practical and active. The more I think of him the better I get on, and
I am the less tempted to absurdity and eccentricity in thought.</p>

<p>As for outward act, no one here seems to think me odd or daft. Some did
at Cambridge, but here I have escaped. My rule is to avoid the company
of young men whom I do not respect, unless I have the control of them.</p>

<p>King’s College has its Senior Wrangler this year. I announced it to my
class yesterday morning. Lightfoot has commissioned some more from me
to be sent to Trinity.</p>


<p class="nindc"><span class="allsmcap">To E. B. Litchfield, Esq.</span></p>

<p class="right"><i>129 Union Street,<br>
Aberdeen, 7th February 1858.</i></p>

<p>When I last wrote I was on my way here. Since then I have been at work,
Statics and Dynamics; two days a week being devoted to Principles of
Mechanism, and afterwards to Friction, Elasticity and Strength of
Materials, and also Clocks and Watches, when we come to the pendulum.
We have just begun hydrostatics. I have found a better text-book for
hydrostatics than I had thought for,—the run of them are so bad,
both Cambridge and other ones,—Galbraith and Haughton’s <i>Manual of
Hydrostatics</i> (Longmans, 2s.) There are also manuals of Mechanics
and Optics of the same set. There is no humbug in them, and many
practical matters are introduced instead of mere intricacies. The only
defect is a somewhat ostentatious resignation of the demonstrations<span class="pagenum" id="Page_302">[Pg 302]</span>
of certain truths, and a leaning upon feigned experiments instead of
them. But this is exactly the place where the students trust most to
the professor, so that I care less about it. I shall adopt the Optics,
which have no such defect, and possibly the Mechanics, next year.</p>

<p>My students of last year, to the number of about fourteen, form a
voluntary class, and continue their studies. We went through Newton
<span class="allsmcap">I. II. III.</span>, and took a rough view of the Lunar Theory, and
of the present state of Astronomy. Then we have taken up Magnetism and
Electricity, static and current, and now we are at Electro-magnetism
and Ampère’s Laws. I intend to make Faraday’s book the backbone of all
the rest, as he himself is the nucleus of everything electric since
1830.</p>

<p>So much for class work. Saturn’s Rings are going on still, but this
month I am clearing out some spare time to work them in. I have got up
a model to show the motions of a ring of satellites, a very neat piece
of work, by Ramage, the maker of the “top.”</p>

<p>For other things—I have not much time in winter for improving my
mind. I have read Froude’s History, <i>Aurora Leigh</i>, and Hopkins’s
<i>Essay on Geology</i>, also Herschel’s collected Essays, which I like
much, also Lavater’s life and <i>Physiognomy</i>, which has introduced
me to him pleasantly though verbosely. I like the man very much, quite
apart from his conclusions and dogmas. They are only results, and far
inferior to methods. But many of them are true if properly understood
and applied, and I suppose the rest are worth respect as the statements
of a truth-telling man.</p>

<p>Well, work is good, and reading is good, but friends are better. I have
but a finite number of friends, and they are dropping off, one here,
one there. A few live and flourish. Let it be long, and let us work
while it is day, for the night is coming, and work by day leads to rest
by night.</p>


<p class="nindc"><span class="allsmcap">To Rev. Lewis Campbell.</span></p>

<p class="right"><i>129 Union Street,<br>
Aberdeen, 17th February 1858.</i></p>

<p>... I have not been reading much of late. I have<span class="pagenum" id="Page_303">[Pg 303]</span> been hard at
mathematics. In fact I set myself a great arithmetical job of
calculating the tangential action of two rings of satellites, and
I am near through with it now. I have got a very neat model of my
theoretical ring, a credit to Aberdeen workmen. Here is a diagram, but
the thing is complex and difficult to draw:—</p>

<p>Two wheels turning on parallel parts of a cranked axle; thirty-six
little cranks of same length between corresponding points of the
circumferences; each carries a little ivory satellite.<a id="FNanchor_205" href="#Footnote_205" class="fnanchor">[205]</a></p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Miss Cay.</span></p>

<p class="right"><i>129 Union Street,<br>
18th February 1858.</i></p>

<p><span class="allsmcap">Dear Aunt</span>—This comes to tell you that I am going to have a
wife.</p>

<p>I am not going to write out a catalogue of qualities, as I am not fit;
but I can tell you that we are quite necessary to one another, and
understand each other better than most couples I have seen.</p>

<p>Don’t be afraid; she is not mathematical; but there are other things
besides that, and she certainly won’t stop the mathematics. The only
one that can speak as an eyewitness is Johnnie, and he only saw her
when we were both trying to act the indifferent. We have been trying it
since, but it would not do, and it was not good for either.</p>

<p>So now you know who it is, even Katherine Mary Dewar (hitherto). I have
heard Uncle Robert speak (second-hand) of her father, the Principal.
Her mother is a first-rate lady, very quiet and discreet, but has stuff
in her to go through anything in the way of endurance.... So there is
the state of the case. I settled the matter with her, and the rest of
them are all conformable.</p>

<p>I hope some day to make you better acquainted. I can hardly admit that
Johnnie saw her at all,—not as he will when she appears in a true
light.... For the present you<span class="pagenum" id="Page_304">[Pg 304]</span> must just take what I say on trust. You
know that I am not given to big words. So have faith and you shall know.</p>

<p>... I don’t write separately to Uncle Robert, seeing he is with
you, and I am very busy, and just now I should just write the same
thing over again, and I have not a copying press. So good-bye.—Your
affectionate nephew.</p>


<p class="nindc"><span class="allsmcap">To E. B. Litchfield, Esq.</span></p>

<p class="right"><i>129 Union Street,<br>
Aberdeen, 5th March 1858.</i></p>

<p>My “lines” are so pleasant to me that I think that everybody ought to
come to me to catch the infection of happiness. This college work is
what I and my father looked forward to for long, and I find we were
both quite right—that it was the thing for me to do. And with respect
to the particular college, I think we have more discipline and more
liberty, and therefore more power of useful work, than anywhere else.
It is a great thing to be the acknowledged “regent” of one’s class for
a year, so as to have them to one’s self except in mathematics and
what additional classes they take. Then the next year I get those that
choose to come, which makes a select class for the higher branches.
They have all great power of work.</p>

<p>In Aberdeen I have met with great kindness from all sects of people,
and you now know of my greatest achievement in the way of discovery,
namely, the method of converting friendship and esteem into something
far better. We are following up that discovery, and making more of it
every day; getting deeper and deeper into the mysteries of personality,
so as to know that we ourselves are united, and not merely attracted by
qualities or virtues, either bodily or mental.—(Don’t suppose we talk
metaphysics.) ...</p>

<p>You will easily see that my “confession of faith” must be liable to
the objection that Satan made against Job’s piety. One thing I would
have you know, that I feel as free from compulsion to any form of
compromised faith as I did before I had any one to take care of, for I
think we both<span class="pagenum" id="Page_305">[Pg 305]</span> believe too much to be easily brought into bondage to
any set of opinions.</p>

<p>With respect to the “material sciences,” they appear to me to be
the appointed road to all scientific truth, whether metaphysical,
mental, or social. The knowledge which exists on these subjects
derives a great part of its value from ideas suggested by analogies
from the material sciences, and the remaining part, though valuable
and important to mankind, is not scientific but aphoristic. The
chief <i>philosophical</i> value of physics is that it gives the
mind something distinct to lay hold of, which, if you don’t, Nature
at once tells you you are wrong. Now, every stage of this conquest
of truth leaves a more or less presentable trace on the memory, so
that materials are furnished here more than anywhere else for the
investigation of the great question, “How does Knowledge come?”</p>

<p>I have observed that the practical cultivators of science (<i>e.g.</i>,
Sir J. Herschel, Faraday, Ampère, Oërsted, Newton, Young), although
differing excessively in turn of mind, have all a distinctness and a
freedom from the tyranny of words in dealing with questions of Order,
Law, etc., which pure speculators and literary men never attain.</p>

<p>Now, I am going to put down something on my own authority, which you
must not take for more than it is worth. There are certain men who
write books, who assume that whatever things are orderly, certain, and
capable of being accurately predicted by men of experience, belong to
one category; and whatever things are the result of conscious action,
whatever are capricious, contingent, and cannot be foreseen, belong to
another category.</p>

<p>All the time I have lived and thought, I have seen more and more
reason to disagree with this opinion, and to hold that all want of
order, caprice, and unaccountableness results from interference with
liberty, which would, if unimpeded, result in order, certainty, and
trustworthiness (certainty of success of predicting). Remember I do
not say that caprice and disorder are not the result of free will (so
called), only I say that there is a liberty which is not disorder,<span class="pagenum" id="Page_306">[Pg 306]</span> and
that this is by no means less free than the other, but more.</p>

<p>In the next place, there are various states of mind, and schools of
philosophy corresponding to various stages in the evolution of the idea
of liberty.</p>

<p>In one phase, human actions are the resultant (by
\(\mathrm{par}^{\mathrm{m}}\), of forces) of the various attractions
of surrounding things, modified in some degree by internal states,
regarding which all that is to be said is that they are subjectively
capricious, objectively the “<span class="allsmcap">Result of Law</span>,”—that is, the
wilfulness of our wills feels to us like liberty, being in reality
necessity.</p>

<p>In another phase, the wilfulness is seen to be anything but free will,
since it is merely a submission to the strongest attraction, after the
fashion of material things. So some say that a man’s will is the root
of all evil in him, and that he should mortify it out till nothing of
himself remains, and the man and his selfishness disappear together. So
said Gotama Buddha (see Max Müller), and many Christians have said and
thought nearly the same thing.</p>

<p>Nevertheless there is another phase still, in which there appears
a possibility of the exact contrary to the first state, namely, an
abandonment of wilfulness without extinction of will, but rather
by means of a great development of will, whereby, instead of being
consciously free and really in subjection to unknown laws, it becomes
consciously acting by law, and really free from the interference of
unrecognised laws.</p>

<p>There is a screed of metaphysics. I don’t suppose that is what you
wanted. I have no nostrum that is exactly what you want. Every man must
brew his own, or at least fill his own glass for himself, but I greatly
desire to hear some more from you, just to get into <i>rapport</i>.</p>

<p>As to the Roman Catholic question, it is another piece of the doctrine
of Liberty. People get tired of being able to do as they like, and
having to choose their own steps, and so they put themselves under holy
men, who, no doubt, are really wiser than themselves. But it is not
only wrong, but impossible, to transfer either will or responsibility
to another;<span class="pagenum" id="Page_307">[Pg 307]</span> and after the formula have been gone through, the patient
has just as much responsibility as before, and feels it too. But it is
a sad thing for any one to lose sight of their work, and to have to
seek some conventional, arbitrary treadmill-occupation prescribed by
sanitary jailors....</p>

<p>With respect to the class, I send you the paper they did last week.
Five floored it approximately, two first-rate. I got half-a-dozen
correct answers to questions on the effects of mixtures of ice and
steam in various proportions, and on the effect of heating and cooling
on the thrust of iron beams (numerical). From the higher class I have
essay on Vision (construction of eye, spectacles, stereoscopes, etc.)
So the work done is equivalent to the work spent.</p>


<p class="nindc"><span class="allsmcap">To Rev. Lewis Campbell.</span></p>

<p class="right"><i>Aberdeen, 15th March 1858.</i></p>

<p>When we had done with the eclipse to-day, the next calculation was
about the conjunction. The rough approximations bring it out early in
June....</p>

<p>The first part of May I will be busy at home. The second part I may go
to Cambridge, to London, to Brighton, as may be devised. After which we
concentrate our two selves at Aberdeen by the principle of concerted
tactics. This done, we steal a march, and throw our forces into the
happy valley, which we shall occupy without fear, and we only wait your
signals to be ready to welcome reinforcements from Brighton.... Good
night.—Your affectionate friend.</p>

<p class="right"><span class="allsmcap">J. C. Maxwell.</span></p>

<p><i>N.B.</i>—We are going to do optical experiments together in summer.
I am getting two prisms, and our eyes are so good as to see the spot on
the sun to-day without a telescope.</p>


<p class="nindc"><span class="allsmcap">To Prof. J. C. Maxwell from Prof. Forbes.</span></p>

<p class="right"><i>Edinburgh, 16th March 1858.</i></p>

<p>I was much obliged to you for your letter, and the announcement of
your marriage, which I have not the smallest<span class="pagenum" id="Page_308">[Pg 308]</span> doubt will add to your
happiness, while at the same time I do not fear its abstracting you
from science.</p>

<p>Your notice of Saturn will be very acceptable. But it should not run to
too great a length, as the 19th will probably be our last meeting, and
is always a crowded billet. Give me an idea of the least time requisite
to give an idea of your subject; and more particularly try to send me a
piece of the MS., so that I may legally hold it as a MS. delivered, and
take precedence of some trivial communications of which I stand rather
in dread.</p>

<p>I duly received the <i>Top</i>. I suppose it is all right, but my
energies have been absorbed in Electrical experiments merely for
lecture, and which have been very heavy upon me. I ought to have paid
for the Top ere now, but I will soon.</p>

<p>We saw the Eclipse very badly, and it seems that in England it was no
better. I had arranged to give a telegraphic account to R. Soc. last
night, from no less than 3 points on the central line....</p>


<p class="nindc"><span class="allsmcap">To Rev. Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Springholm,<br>
Dumfries, 28th April 1858.</i></p>

<p>... I wish you great joy, now and always! I hope to certify myself ere
long what sort of “friend’s wife” I am to have. I have faith already,
but sight is better, and you will have some pleasure in getting my
verdict, though you don’t need anything of the kind.</p>

<p>I have been very happy in observing the very admirable frame of mind
in which all my friends seem disposed to regard my affairs, and yet I
would rather that their opinions and sentiments had a more distinct
basis of observation. But I suppose they observe me, and see I am “all
right and no mistake.” ...</p>

<p>I tell you this ... because you are our friend for better for worse.</p>

<p>I shall bring you a small pen-wiper that Katherine made for you the
last day I was in Aberdeen. If you are careful<span class="pagenum" id="Page_309">[Pg 309]</span> in using it as it ought
to be used, you will get rid of all the “odium theologicum” and other
bitter principles sometimes occurring in parsons’ ink, and your heart
will indite good matter with the pen of a ready writer....</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, 29th April 1858.</i></p>

<p>... I displayed my model of Saturn’s Ring at the Edinburgh Royal
Society on the 19th. The anatomists seemed to take most interest in the
construction of it. We are going to do some experiments on colour this
summer, if my prisms turn out well. I have got a beautiful set of slits
made by Ramage, to let in the different pencils of light at the proper
places, and of the proper breadths.</p>


<p class="nindc"><span class="allsmcap">To Miss K. M. Dewar.</span></p>

<p class="right"><i>2d May 1858.</i></p>

<p>Now you must remember that all I say about texts and matters of that
sort is only a sort of help to being together when we read, for I am
not skilful to know what is the right meaning of anything so as to tell
other people, only I have a right to try to make it out myself, and
what I say to myself I may say to you.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>6th May 1858.</i></p>

<p>Isaiah <span class="allsmcap">LI</span>. and Gal. <span class="allsmcap">V</span>. I. suppose the leaven in
<span class="allsmcap">V</span>. 9 is the little bit of Judaism that they were going to
adopt on the plea that it is “safer” to do and believe too much than
too little, and yet these little things altered the character of the
whole of their religion by making it a thing of labour and wages,
instead of an inward growth of faith working by love, which purifies
the heart now, and encourages us to wait for the hope of righteousness.
But still the desire of the spirit is contrary to the desire of the
flesh, the one tending towards God, and the other towards the elements
of the world, so that we are kept stretched as it were, and this is
our training in this life. Our flesh is God’s making, who<span class="pagenum" id="Page_310">[Pg 310]</span> made us
part of His world; but then He has given us the power of coming nearer
to Himself, and so we ought to use the world and our bodies as means
towards the knowledge of Him, and stretch always as far as our state
will permit towards Him. If we do not, but wilfully seek back again
to the elements as the Israelites to Egypt, then we are not like
infants or even brutes, but far worse, as recoiling from God and His
blessedness. Here are manifest the works of the flesh, which are not
only not those of righteousness, but opposed to them; but the fruit of
the spirit comes when, like good trees, we stretch our best affections
upwards till we see the sun, and breathe the air and drink the rain,
and receive all free gifts, instead of sending our branches after our
roots, down among things that once had life but now are decaying, and
seeking there for nourishment that can only be had from above.</p>

<p>See the order of ripening of the fruit. How, love brings joy to
ourselves, and this, peace with others, and this, long-suffering of
their attacks, for why should we be angry? Gentleness is a higher
degree of this, being active. Goodness is used in a less general sense
than we use it. It seems something like “good nature,” only better
and more manly, and refers to the good disposition of a man among
men. Faith is put in here as the <i>result</i> of good living; which
is true, for it is nourished thereby. Then see what comes of adding
faith to a good disposition,—meekness, which we cannot afford to have
without faith; and lastly, temperance or moderation, which is also
founded on faith, and is a virtue that can never be perfect till all
the rest are so.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Milford, Lymington (Hants),<br>
9th May 1858.</i></p>

<p>To-day we were called at seven; were down soon thereafter, and had
everything leisurely and comfortably till ten, when we went to school.
I had a class of youths just beginning to read, and some of them
knew not what swine were, still less what a herd was. At eleven to
church—Lewis<span class="pagenum" id="Page_311">[Pg 311]</span> read prayers and lessons very well and distinctly, and
Chester preached on James <span class="allsmcap">I</span>. 15. Sin when it is finished
bringeth forth death. He showed up sin as the universal poison, and
showed how it might be seen working death in several instances, and
also in all, good and bad, in this life, and then turned to the next,
and finally indicated the remedy, though not so clearly as Paul in Rom.
<span class="allsmcap">VIII</span>. 2, which he should have read.</p>

<p>In the afternoon Chester read prayers and Lewis preached on “Ye must be
born again,” showing how respectable a man it was addressed to, and how
much he, and all the Jews, and all the world, and ourselves, needed to
be born from above (for that is the most correct version of the word
translated again). Then he described the changes on a man new-born, and
his state and privileges. I think he has got a good hold of the people,
and will do them good and great good.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>10th May 1858.</i></p>

<p>Eph. <span class="allsmcap">III</span>. 19.—Paul can express no more, but read the last
two verses and you will see this is not the crown, but only what can
be asked or thought. What a field for ambition there is,—for climbing
up, or rather, being drawn up, into Christ’s love, and receiving into
our little selves all the fulness of God. Let us bless God even now for
what He has made us capable of, and try not to shut out His spirit from
working freely.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>13th May 1858.</i></p>

<p>I have been reading again with you Eph. <span class="allsmcap">VI</span>. Here is more about
family relations. There are things which have meanings so deep that
if we follow on to know them we shall be led into great mysteries of
divinity. If we despise these relations of marriage, of parents and
children, of master and servant, everything will go wrong, and there
will be confusion as bad as in Lear’s case. But if we reverence them,
we shall even see beyond their first aspect a spiritual meaning, for
God speaks to us more plainly in these bonds of<span class="pagenum" id="Page_312">[Pg 312]</span> our life than in
anything that we can understand. So we find a great deal of Divine
Truth is spoken of in the Bible with reference to these three relations
and others.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>16th May 1858.</i></p>

<p>Phil. <span class="allsmcap">III</span>.—There is great wisdom in <span class="allsmcap">V</span>. 13. Never
look back with complacency on anything done, or attained, or possessed.
See the description of those who mind earthly things, and let us depart
from their ways. Conversation in <span class="allsmcap">V</span>. 20 means going backwards
and forwards, and refers to the walking of the preceding verses. What
a description of the power of Christ in the last verse, over “all
things,” and our vile bodies among the rest, and what a day it will be
when He has done all His work and is satisfied.</p>

<p>I think the more we enter together into Christ’s work He will have the
more room to work His work in us. For He always desires us to be one
that He may be one with us. Our worship is social, and Christ will be
wherever two or three are gathered together in His name.</p>

<p>I have been vexed that I could not speak better to ——. I had a long
walk with him, talking of what people have believed, and what was
necessary to be believed. I hope we may come to understand each other,
but more that he may come to the clear light. I wish I could speak to
him wise words. He is so anxious to hear, and I to speak, and then the
words are all wind after all.</p>


<p class="nindc"><span class="allsmcap">To Prof. J. C. Maxwell from Vernon Lushington, Esq.</span></p>

<p class="right"><i>Ockham, 31st May 1858.</i></p>

<p>Next Wednesday is <i>your</i> second of June, after which we shall
no longer be able to think of you as one of ourselves—the youthful
wanderers and seekers of the earth. So how can I better employ the end
of this Sunday evening than by bidding you Farewell and God speed?...</p>

<p>When Wednesday comes I hope I shall think of you.</p>

<p>I like thinking of you,—what you were, what you are, and what you may
be. All happiness be with you and yours!</p>
</div>

<p><span class="pagenum" id="Page_313">[Pg 313]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, 24th July 1858.</i></p>

<p>... We are no great students at present, preferring, various passive
enjoyments, resulting from the elemental influences of sun, wind, and
streams. This week I have begun to make a small hole into Saturn, who
has slept on his voluminous ring for months.</p>


<p class="nindc"><span class="allsmcap">To Mrs. Maxwell.</span></p>

<p class="right"><i>16th September 1859.</i></p>

<p>Mrs. Sabine learnt mathematics of her husband after she was married,
so she was not married for it. Murchison knew no geology when he was
married, but his wife did a little; and there was a fall of a cliff
in the morning early, and her maid told her of it, so she was for
up;<a id="FNanchor_206" href="#Footnote_206" class="fnanchor">[206]</a> so Murchison got up too, and there were the great hones of an
Icthyosaurus in the broken cliff, and he was interested and took to
geology. Before that he was an idle young officer.</p>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_198" href="#FNanchor_198" class="label">[198]</a> 
See above, <a href="#Page_85">p. 85.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_199" href="#FNanchor_199" class="label">[199]</a> 
See the Poems of 1858 amongst the Occasional Pieces in
<a href="#PART_III">Part III.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_200" href="#FNanchor_200" class="label">[200]</a> 
See above, <a href="#Page_258">p. 258</a>. As this candidature was the last
occasion on which Maxwell was compelled to collect testimonials, it
may be well to add here to what has been said above about his teaching
powers, that his success at Aberdeen was very strongly attested by
his colleagues, and in particular by Thomas Clark, the Professor of
Chemistry. And four years earlier, in February 1854, Professor G.
G. Stokes had given this important testimony:“... One thing more is
wanted in a teacher, namely, a power of conveying clearly his knowledge
to others. That Mr. Maxwell possesses that power I feel satisfied,
having once been present when he was giving an account of some of his
geometrical researches to the Cambridge Philosophical Society, on
which occasion I was struck with the singularly lucid manner of his
exposition.” (See <a href="#Page_212">p. 212.</a>)</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_201" href="#FNanchor_201" class="label">[201]</a> 
For confirmation of this, see Maxwell’s (fragmentary)
preface to the smaller treatise on electricity, published posthumously
in 1881; especially these words: “In the larger treatise I sometimes
made use of methods which I do not think the best in themselves, but
without which the student cannot follow the investigations of the
founders of the Mathematical Theory of Electricity. I have since become
aware of the superiority of methods akin to those of Faraday, and have
therefore adopted them from the first.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_202" href="#FNanchor_202" class="label">[202]</a> 
This letter has already been published in the <i>Life of
Faraday</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_203" href="#FNanchor_203" class="label">[203]</a> 
See a little book entitled “Crushed Hopes Crowned in
Death,” London, 1862.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_204" href="#FNanchor_204" class="label">[204]</a> 
<i>Deutche Liebe.</i> (By Prof. Max Müller.)</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_205" href="#FNanchor_205" class="label">[205]</a> 
The sketch which follows corresponds to the model which
is preserved in the Cavendish Laboratory. See <a href="#PART_II">Part II.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_206" href="#FNanchor_206" class="label">[206]</a> 
“was for up,” <i>i.e.</i> wished to get up.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_314">[Pg 314]</span></p>

<h2 class="nobreak" id="CHAPTER_XI">CHAPTER XI.<br>
<span class="allsmcap">KING’S COLLEGE, LONDON, 1860 TO 1865—GLENLAIR, 1860 to
1870—<i>ÆT.</i> 29-39.</span></h2>
</div>

<p class="nind">
FROM this point onward the interest of Maxwell’s life
(save things “wherewith the stranger intermeddles not”) is chiefly
concentrated in his scientific career. As some account of his labours
in science will be given in the second portion of this book, what
remains of the present narrative is comparatively brief.</p>

<div class="sidenote">1860-1865.
<i>Æt.</i> 29-34.</div>

<p>The work at King’s College was more exacting than that in Aberdeen.
There were nine months of lecturing in the year, and evening lectures
to artisans, etc., were recognised as a part of the Professor’s regular
duties. Maxwell retained the post until the spring of 1865, when he
was succeeded by Professor W. G. Adams, but continued lecturing to the
working men during the following winter.</p>

<p>In June 1860 Maxwell attended the British Association’s meeting at
Oxford, where he exhibited his box for mixing the colours of the
spectrum. He also presented to Section A a most important paper on
Bernoulli’s Theory of Gases; a theory which supposes that a gas
consists of a number of independent particles moving about among one
another without<span class="pagenum" id="Page_315">[Pg 315]</span> mutual interference, except when they come into
collision. Maxwell showed that the apparent viscosity of gases, their
low conductivity for heat, and Graham’s laws of diffusion, could be
satisfactorily explained by this theory, and gave reasons for believing
that in air at ordinary temperature each particle experiences on an
average more than 8,000,000,000 collisions per second. It is probable
that the contemplation of the “flight of brick-bats” (his own vivid
phrase for the constitution of Saturn’s rings) led him on to his
far-reaching investigations in this field of molecular physics.</p>

<p>On the 17th of May 1861 he delivered his first lecture before the
Royal Institution. The subject was “On the Theory of the three Primary
Colours.”</p>

<p>All this while Maxwell was quietly and securely laying the foundations,
deep and wide, of his great work on Electricity and Magnetism, but he
had not the leisure that was requisite for bringing it to completion.</p>

<p>The period of his King’s College Professorship was far, however, from
being scientifically unfruitful. The colour-box was perfected, and many
series of observations were made with it. Mrs. Maxwell’s observations
were found to have a special value. Through a striking discrepancy
between her readings and C. H. Cay’s, Maxwell discovered that the
blindness of the <i>Foramen Centrale</i> to blue light, which was
strongly marked in his own dark eyes, was either altogether absent from
hers, or present in a very low degree. The comparison of J. C. M.’s
(J.’s) eyes, and Mrs. M.’s (K.’s) is referred to in Part II.</p>

<p><span class="pagenum" id="Page_316">[Pg 316]</span></p>

<p>The experimental measurements by which the present standard of
electrical resistance (the Ohm) was first determined, were made at
King’s College by a sub-committee of the B.A., consisting of Maxwell,
Balfour Stewart, and Fleeming Jenkin, in 1862-63, in accordance with a
method proposed by Sir Wm. Thomson. A further experimental measurement
was made next year by Maxwell, Fleeming Jenkin, and Charles Hockin
(Fellow of St. John’s). The importance of the work may be estimated
by the fact that the system of units then determined by the B.A.
Committee was, in the main, adopted by the Electrical Congress which
met last year (1881) in Paris, and an International Commission has
been appointed by the European Governments to make a redetermination
of the standard of resistance first measured by the B.A. Committee.
Maxwell’s papers on this subject, with those of his fellow-workers,
were republished in 1873 in a volume edited by Fleeming Jenkin.<a id="FNanchor_207" href="#Footnote_207" class="fnanchor">[207]</a>
Many are the references to successful or fruitless “spins” in the home
letters of this period. The following quotation will suffice:—</p>

<div class="blockquot">

<p class="right"><i>28th January 1864.</i></p>

<p>We are going to have a spin with Balfour Stewart to-morrow. I hope we
shall have no accidents, for it puts off time so when anything works
wrong, and we cannot at first find out the reason, or when a string
breaks, and the whole spin has to begin again.... However, we hope to
bring out our standards by September, and Becker<a id="FNanchor_208" href="#Footnote_208" class="fnanchor">[208]</a> makes them up
excellently.</p>
</div>

<p><span class="pagenum" id="Page_317">[Pg 317]</span></p>

<p>A mass of correspondence, containing numerous suggestions made by
Maxwell from day to day in 1863-4, has been preserved by Professor
Jenkin. Two of the least technical passages will be found amongst the
letters in this chapter (pp. 337, 340).</p>


<p class="space-above2">
Another very important experimental investigation conducted by
Maxwell about this period was the determination of the ratio of the
electromagnetic and electrostatic units of electricity, for the
purpose of comparing this quantity with the velocity of light. As
this investigation will be again referred to in Part II., it is only
necessary to say here that the experiment amounts to a comparison
between the attractions of two electric currents flowing in coils of
wire, and the attraction or repulsion between two metal plates which
have each received a charge of electricity. Maxwell had pointed out
that, in accordance with his theory, the ratio of the units should
be equal to the velocity of light, and the value obtained by him was
intermediate between the extreme values obtained for that velocity by
previous observers. The experiment was the outcome of his theory of the
constitution of the space in the neighbourhood of magnetic and electric
currents, by which he accounted for all the then known phenomena of
magnetism and electricity, and which he published in a semi-popular
form in the <i>Philosophical Magazine</i> in 1861 and 1862.</p>

<p>During most of the King’s College time Maxwell resided at 8 Palace
Gardens Terrace, Kensington, where he carried on many of his
experiments in a large garret<span class="pagenum" id="Page_318">[Pg 318]</span> which ran the whole length of the
house. When experimenting at the window with the colour-box (which was
painted black, and nearly eight feet long), he excited the wonder of
his neighbours, who thought him mad to spend so many hours in staring
into a coffin. This was also the scene of his well-known experiments
on the viscosity of gases at different pressures and temperatures. For
some days a large fire was kept up in the room, though it was in the
midst of very hot weather. Kettles were kept on the fire, and large
quantities of steam allowed to flow into the room. Mrs. Maxwell acted
as stoker, which was very exhausting work when maintained for several
consecutive hours. After this the room was kept cool, for subsequent
experiments, by the employment of a considerable amount of ice.</p>

<p>During Maxwell’s residence in London his brother-in-law, the Rev.
Donald Dewar, came and stayed in his house in order to undergo a
painful operation at the hands of Sir James Ferguson. Maxwell gave up
the ground floor of his house to Mr. Dewar and his nurse. He himself,
meanwhile, used to take his meals in a very small back room, where
frequently he breakfasted (on porridge) on his knees, because there was
no room for another chair at the table. Maxwell acted frequently in the
capacity of nurse to Mr. Dewar, who would always look out anxiously for
his return from college, and whose face would light up with a smile of
pleasure and relief when he saw him coming, because he said he knew he
should be comfortable when Maxwell returned.</p>

<p><span class="pagenum" id="Page_319">[Pg 319]</span></p>

<p>One pleasant incident of his stay in London was the improvement of his
acquaintance with Faraday, with whom he seems to have dined on the
occasion of his lecture before the Royal Institution in 1861.</p>

<p>On one occasion he was wedged in a crowd attempting to escape from the
lecture theatre of the Royal Institution, when he was perceived by
Faraday, who, alluding to Maxwell’s work among the molecules, accosted
him in this wise—“Ho, Maxwell, cannot you get out? If any man can find
his way through a crowd it should be you.”</p>

<p>He also renewed his personal intercourse with Litchfield, Droop, and
other Cambridge friends.</p>

<p>His habit at this time was to do his scientific work chiefly in the
mornings, unless when entertaining friends, when he would give up
his days to them and take hours for work out of the night. In the
afternoons he would ride with Mrs. Maxwell. She had been recommended
horse exercise in 1860, when the pony “Charlie,” called after Charles
Hope Cay, was bought at the Rood fair. He was a high-bred, spirited,
light bay Galloway, with arched neck and flowing tail. Maxwell himself
broke him in, riding side-saddle, with a piece of carpet to take the
place of a habit. This pony was a great favourite until the end in 1879.</p>

<p>About this time (between 1860 and 1865) the endowment of Corsock Church
was completed, and the Manse built. Maxwell gave largely to both
objects, which were promoted mainly by his zeal and energy.</p>

<p>At the beginning and at the close of the King’s College period Maxwell
suffered from two severe<span class="pagenum" id="Page_320">[Pg 320]</span> illnesses, both of a dangerously infectious
nature, and in both of them he was nursed by Mrs. Maxwell. In September
1860 he had an attack of smallpox at Glenlair, which he was supposed
to have caught at the fair, where “Charlie” was bought. During this
illness his wife was left quite alone with him—the servants only
coming to the door of the sick-room. He has been heard to say that by
her assiduous nursing on this occasion she saved his life.</p>

<p>The second illness was in September 1865, also at Glenlair. Maxwell
had been riding a strange horse, and got a scratch on the head from a
bough of a tree; this was followed by an attack of erysipelas, which
brought him very low. Mrs. Maxwell was again his nurse, and to listen,
as he insisted on doing, to her quiet reading of their usual portion of
Scripture every evening, was the utmost mental effort which he could
bear.</p>


<div class="sidenote">1866-1870.
<i>Æt.</i> 35-39.</div>

<p>The years which followed the resignation of his post at King's College
were spent, for the most part, at Glenlair, the house being at this
time enlarged in general accordance with his father’s plan. And Maxwell
took advantage of this retirement to embody some of the results of his
investigations in substantive books. The great work on Electricity and
Magnetism, although not published till 1873, was now taking definite
shape, and the treatise on Heat, which appeared in 1870, had been
undertaken as a by-work during the same period.</p>

<p>His scientific and other correspondence also took<span class="pagenum" id="Page_321">[Pg 321]</span> up a good deal of
energy. Some measure of it is afforded by the fact that a “pillar”-box
was let into the rough stone wall on the roadside, across the Urr, for
the sole use of Glenlair House. Maxwell would himself carry the letters
to and from this rustic post-office in all weathers, at the same time
giving the dogs a run.</p>

<p>Both now and afterwards, his favourite exercise—as that in which his
wife could most readily share—was riding, in which he showed great
skill. Mr. Fergusson remembers him in 1874, on his new black horse,
“Dizzy,” which had been the despair of previous owners, “riding the
ring,” for the amusement of the children at Kilquhanity, throwing up
his whip and catching it, leaping over bars, etc.</p>

<p>A considerable portion of the evening would often be devoted to
Chaucer, Spenser, Milton, or a play of Shakespeare, which he would read
aloud to Mrs. Maxwell.</p>

<p>On Sundays, after returning from the kirk, he would bury himself in
the works of the old divines. For in theology, as in literature,
while reckoning frankly with all phases, his sympathies went largely
with the past. Not that he would have checked the real progress of
thought on the subject of religion, but he did not share the sanguine
hopes of some who have sought to hasten these “slow-paced” changes;
nor did he believe in progress by ignoring differences, or by merging
the sharp outlines of traditional systems in the haze of a “common
Christianity.” He was one of those in whom physical studies seem to<span class="pagenum" id="Page_322">[Pg 322]</span>
have the effect of leading the mind to dwell on the permanent aspects
of thought as well as of things, thus reinforcing the instincts of
conservatism. No mind ever delighted more in speculation, and yet none
was ever more jealous of the practical application or the popular
dissemination of what appeared to him as crude and half-baked theories
about the highest subjects. He preferred resting on the great thoughts
of other ages, though no man knew better wherein they (and scientific
theories likewise) fell short of certainty; and while he was anything
rather than a formalist or a dogmatist, and still clung to the belief
that love remains while knowledge vanishes away, he was the enemy of
indefiniteness and indifferentism, as well as of a style of preaching
which, as he used to say, “dings ye wi mere morality.” His theological
attitude, which it would be rash to develop further here, is indicated
to some extent in his letter to Bishop Ellicott, and in his reply to
the Secretary of the Victoria Institute, both of which will be found in
Chapter XII (<a href="#Page_393">pp. 393</a>, <a href="#Page_404">404</a>).</p>

<p>But he was far, indeed, from judging men by their opinions. “I have
no nose for heresy,” he used to say. His sympathy pierced beneath the
outer shell of circumstance and association, and he hardly ever failed
to discover what was best and strongest in those with whom he had to do.</p>

<p>His kindly relations with his neighbours and with their children may
be passed without further notice after what has been said above. But
it may be mentioned that he used occasionally to visit any sick<span class="pagenum" id="Page_323">[Pg 323]</span>
person in the village, and read and pray with them in cases where such
ministrations were welcomed.</p>

<p>One who visited at Glenlair between 1865 and 1869 was particularly
struck with the manner in which the daily prayers were conducted by the
master of the household. The prayer, which seemed extempore, was most
impressive and full of meaning.<a id="FNanchor_209" href="#Footnote_209" class="fnanchor">[209]</a></p>

<p>It is right also to record briefly his continued intercourse with
his cousins of the Cay family. Mr. William Dyce Cay, who had now
entered on his profession as a civil engineer, was employed by him to
build the bridge over the Urr, and has a vivid recollection of their
intercourse, both then (1861-2) and in<span class="pagenum" id="Page_324">[Pg 324]</span> former years. In particular he
remembers how, on one occasion, Maxwell spent the whole time during a
walk of several miles over the hill from Glenlair to Parton, “giving
one example after another to explain by illustration the principle of
virtual velocities.” ... “The feeling I had,” says Mr. Cay, “was that
before I got to the bottom of one example he had rushed off to another.”</p>

<p>And the reader will find in the correspondence two of Maxwell’s letters
to my friend Charles Hope Cay, and in another letter a few words
of bright description of him. He died in 1869, at the early age of
twenty-eight, the most devoted of teachers, one of the purest-hearted
and most amiable of men. If he <i>could</i> have listened to his
cousin’s gentle warnings against excessive zeal, perhaps his services
to Clifton College, if less vividly remembered, might have been
continued longer. But who knows? “They whom the gods love die young.”</p>

<div class="sidenote"><i>Æt.</i> 35.</div>

<p>Maxwell’s retirement was not by any means unbroken. There was a visit
to London in the spring of every year. And in the spring and early
summer of 1867 he made a tour in Italy with Mrs. Maxwell. They had
the misfortune to be stopped for quarantine at Marseilles, and his
remarkable power of physical endurance and of ministration were felt
by all who shared in the mishap. True to the associations of his early
days (see above, pp. 28, 121), he became the general water-carrier, and
in other ways contributed greatly to the alleviation of discomforts
that were by no means light.</p>

<p><span class="pagenum" id="Page_325">[Pg 325]</span></p>

<p>We met accidentally at Florence, and I remember his mentioning two
things as having particularly struck him amongst the innumerable
objects of interest at Rome. He had looked at the dome of St. Peter's
with an eye of sympathetic genius,<a id="FNanchor_210" href="#Footnote_210" class="fnanchor">[210]</a> and his ear for melody had
been satisfied by “the Pope's band.” He acquired Italian with great
rapidity, and amused himself with noticing the different phonetic
values of the letters in Italian and English.<a id="FNanchor_211" href="#Footnote_211" class="fnanchor">[211]</a> One of his chief
objects in learning the language was to be able to converse with
Professor Matteucci, whose bust now stands in the Campo Santo at Pisa.
During the same tour he took special pains to improve his acquaintance
with French and German. The only language he had any difficulty in
mastering was Dutch.</p>

<p>In the years 1866, 1867, 1869, and 1870, he was either Moderator or
Examiner in the Mathematical Tripos at Cambridge, where his influence
was more and more felt. His work on these occasions was, indeed, a
principal factor in the movement, to be hereafter described, which
led ultimately to important changes in the Examination system; to the
creation of the Cavendish Laboratory; and to the foundation of the
Chair of Experimental Physics.</p>

<p>His paper on the Viscosity of Gases, printed in the <i>Phil. Trans.</i>
for 1866, had been delivered by him as the Bakerian Lecture for that
year.</p>

<p><span class="pagenum" id="Page_326">[Pg 326]</span></p>

<div class="sidenote"><i>Æt.</i> 39.</div>

<p>He also attended several meetings of the British Association, and, in
1870, at the Liverpool meeting, was President of Section A (Mathematics
and Physics). His Presidential Address was on the relation of
Mathematics and Physics to each other—a theme suggested by Professor
Sylvester, who had been president of the same section in the previous
year. The opening passage, in which he alludes to other recent
scientific addresses, is characteristic; and may be quoted here:—</p>

<div class="blockquot">

<p>I have endeavoured to follow Mr. Spottiswoode, as with far-reaching
vision he distinguishes the systems of science into which phenomena,
our knowledge of which is still in the nebulous stage, are growing. I
have been carried, by the penetrating insight and forcible expression
of Dr. Tyndall, into that sanctuary of minuteness and of power, where
molecules obey the laws of their existence, clash together in fierce
collision, or grapple in yet more fierce embrace, building up in secret
the forms of visible things. I have been guided by Professor Sylvester
towards those serene heights</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Where never creeps a cloud or moves a wind,</div>
    <div class="verse indent0">Nor ever falls the least white star of snow,</div>
    <div class="verse indent0">Nor ever lowest roll of thunder moans,</div>
    <div class="verse indent0">Nor sound of human sorrow mounts, to mar</div>
    <div class="verse indent0">Their sacred everlasting calm.”</div>
  </div>
</div>
</div>

<p>But who will lead me into that still more hidden and dimmer region
where Thought weds Fact,—where the mental operation of the
mathematician and the physical action of the molecules are seen in
their true relation? Does not the way to it pass through the very den
of the metaphysician, strewed with the remains of former explorers and
abhorred by every man of science? ...</p>
</div>

<p>Two important papers read by Maxwell at the<span class="pagenum" id="Page_327">[Pg 327]</span> same meeting were
that “On Hills and Dales,” to which reference will be found in the
correspondence (pp. 382, 383), and that “On Colour Vision at different
Points of the Retina.”</p>

<p>The Cambridge examinations were the only cause which separated him
for more than a day or two from Mrs. Maxwell. When most pressed with
the load of papers to be read, he would write to her daily—sometimes
twice a day—in letters full of “<i>enfantillages</i>,” as in his
boyish endeavours to amuse his father, telling her of everything,
however minute, which, if she had seen it, would have detained her eye,
small social phenomena, grotesque or graceful (including the dress of
lady friends), together with the lighter aspects of the examinations;
College customs, such as the “grace-cup;” his dealings with his
co-examiners, and marks of honour to himself which he knew would please
her, though they were indifferent to him. And sometimes he falls into
the deeper vein, which was never long absent from his communion with
her, commenting on the portion of Scripture which he knew that she was
reading, and passing on to general meditations on life and duty.</p>

<p>In November 1868 his old teacher, James D. Forbes, had resigned the
principalship of the United College in the University of St. Andrew's,
and an effort was made by several of the professors<a id="FNanchor_212" href="#Footnote_212" class="fnanchor">[212]</a> to induce
Maxwell to stand for the vacant post, which was in the gift of the
Crown, and had been held by Brewster and<span class="pagenum" id="Page_328">[Pg 328]</span> Forbes successively. He was
touched by the kindness, and travelled a whole day from Galloway to
confer with us, but, on mature consideration, relinquished the idea.</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1860 to 1870.</span></p>

<div class="blockquot">

<p class="nindc"><i>To Rev. Lewis Campbell.</i></p>

<p class="right"><i>Marischal College,<br>
Aberdeen, 5th January 1860.</i></p>

<p>... I have been publishing my views about Elastic Spheres in the
<i>Phil. Mag</i>. for Jany., and am going to go on with it as I get
the \(\mathrm{prop}^{\mathrm{ns}}\), written out. I have also sent my
experiments on Colours to the Royal Society of London, so I have two
sets of irons in the fire, besides class work. I hope you get on with
Plato, and that your pupils are all Theætetuses, and that wisdom soaks
like oil into their inwards. There is a man here who is striving after
a general theory of things, but he has great difficulty in so churning
his thoughts as to coagulate and solidify the vague and nebulous
notions which wander in his head. He has been applying to me very
steadily whenever he can pounce on me, and I have prescribed for him as
I best could, and I hope his abstract of his general theory of things
will be palatable to the readers of the <i>British Ass. Reports</i> for
1859.</p>


<p class="nindc"><span class="allsmcap">To his Wife.</span></p>

<p class="right"><i>Edinburgh, 13th April 1860.</i></p>

<p>How let us read (2 Cor.) chapter <span class="allsmcap">XII.</span>, about the organisation
of the Church, and the different gifts of different Christians, and the
reason of these differences that Christ’s body may be more complete
in all its parts. If we felt more distinctly our union to Christ, we
would know our position as members of His body, and work more willingly
and intelligently along with all the rest in promoting the health and
growth of the body, by the use of every power which the spirit has
distributed to us.</p>
</div>

<p><span class="pagenum" id="Page_329">[Pg 329]</span></p>

<div class="blockquot">

<p>Let us read about charity,—that love which is so perfect that it
remains when that which is in part shall be done away. May God purify
our love, and make it fit for eternity, by grafting upon it the love of
Himself, that so both the human root and the engrafted branches and the
divine fruit may be holy to Him!</p>


<p class="nindc"><span class="allsmcap">From C. J. Monro, Esq.</span></p>

<p class="right"><i>Hadley, Barnet, N.<br>
23d October 1861.</i></p>

<p>Thank you much for the papers. That about vortices I had skimmed
already in the magazine. I shall now be able to do more than skim
it. The coincidence between the observed velocity of light and your
calculated velocity of a transverse vibration in your medium seems a
brilliant result. But I must say I think a few such results are wanted
before you can get people to think that, every time an electric current
is produced, a little file of particles is squeezed along between
rows of wheels. But the instances of bodily transfer of matter in the
phenomena of galvanism look like it already, and I admit that the
possibility of convincing the public is not the question.</p>


<p class="nindc"><span class="allsmcap">To H. B. Droop, Esq.</span> (of the Equity Bar).</p>

<p class="right"><i>Glenlair, Dalbeattie, N.B., 28th December 1861.</i></p>

<p>I enclose a short statement of the scheme of endowing the chapel which
was built near us in 1838 for this district, which is very far from
any parish church. If we can raise £1000, there is a fund already
raised which will contribute £2000, so as to give a salary of £120 to
the minister permanently, and as the people are too poor to support
the minister themselves, we hope to make the chapel independent of
chance contributions in this way. Great part of the funds for building
the church were subscribed in London by all kinds of people who were
friends of an English gentleman who then had property here; but we have
no longer any such means of drawing on the metropolis.</p>
</div>

<p><span class="pagenum" id="Page_330">[Pg 330]</span></p>

<div class="blockquot">

<p>If you can put us in the way of diminishing the deficit we shall be
grateful, and I will see that the money goes to the fund, and that the
names are duly entered, however small the contributions.</p>

<p>... I have nothing to do in King’s College till Jany. 20, so we came
here to rusticate. We have clear hard frost without snow, and all the
people are having curling matches on the ice, so that all day you hear
the curling-stones on the lochs in every direction for miles, for the
large expanse of ice vibrating in a regular manner makes a noise which,
though not particularly loud on the spot, is very little diminished by
distance. I am trying to form an exact mathematical expression for all
that is known about electro-magnetism without the aid of hypothesis,
and also what variations of Ampère’s formula are possible, without
contradicting his expressions. All that we know is about the action of
<i>closed</i> currents—that is, currents through closed curves. Now,
if you make a hypothesis (1) about the mutual action of the elements of
two currents, and find it agree with experiment on closed circuits, it
is not proved, for—</p>

<p>If you make another hypothesis (2) which would give <i>no action</i>
between an element and a <i>closed</i> circuit, you may make a
combination of (1) and (2) which will give the same result as (1). So
I am investigating the most general hypothesis about the mutual action
of elements, which fulfils the condition that the action between an
element and a closed circuit is null. This is the case if the action
between two elements can be reduced to forces between the extremities
of those elements depending only on the distance and + or — according
as they act between similar or opposite ends of the elements. If the
force is an attraction
\[
=\phi(r) s s^{\prime}\left(\cos \omega+2 \cos \theta \cos \theta^{\prime}\right)
\]
where \(\omega\) is the angle between \(s\) and \(s^{\prime}\),
\(r\) the distance of \(s\) and \(s^{\prime}\) and \(\theta\) and
\(\theta^{\prime}\) the angles \(s\) and \(s^{\prime}\), the elements,
make with \(r\), then the condition of no action will be fulfilled.</p>
</div>

<p><span class="pagenum" id="Page_331">[Pg 331]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>8 Palace Gardens Terrace, W.,<br>
24th January 1862.</i></p>

<p>... When I wrote to you about closed currents, it was partly to arrange
my own thoughts by imagining myself speaking to you. Ampère’s formula
containing \(n\) and \(k\) is the most general expression for an
attractive or repulsive force in the line joining the elements; and
I now find that if you take the most general expression consistent
with symmetry for an action transverse to that line, the resulting
expression for the action of a closed current on an element gives a
force not perpendicular to that element. Now, experiment 3d (Ampère)
shows that the force on a movable element is perp. to the directions of
the current, so that I see Ampère is right.</p>

<p>But the best way of stating the effects is with reference to “lines of
magnetic force.” Calculate the magnetic force in any plane, arising
from every element of the circuit, and from every other magnetising
agent, then the force on an element is in the line perp. to the plane
of the element and of the lines of force.</p>

<p>But I shall look up Cellerier and Plann, and the long article in
Karsten’s <i>Cyclopœdia</i>. I want to see if there is any evidence
from the mathematical expressions as to whether element acts on
element, or whether a current first produces a certain effect in the
surrounding field, which afterwards acts on any other current.</p>

<p>Perhaps there may be no mathematical reasons in favour of one
hypothesis rather than the another.</p>

<p>As a fact, the effect on a current at a given place depends solely
on the direction and magnitude of the magnetic force at that point,
whether the magnetic force arises from currents or from magnets. So
that the theory of the effect taking place through the intervention
of a medium is consistent with fact, and (to me) appears the simplest
in expression; but I must prove either that the direct action theory
is completely identical in its results, or that in some conceivable
case they may be different. My theory of the rotation<span class="pagenum" id="Page_332">[Pg 332]</span> of the plane of
polarised light by magnetism is coming out in the <i>Phil. Mag.</i> I
shall send you a copy.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>8 Palace Gardens Terrace,<br>
Kensington, London, W. 28th January 1862.</i></p>

<p>Some time ago, when investigating Bernoulli’s theory of gases, I was
surprised to find that the internal friction of a gas (if it depends on
the collision of particles) should be independent of the density.</p>

<p>Stokes has been examining Graham’s experiments on the rate of flow
of gases through fine tubes, and he finds that the friction, if
independent of density, accounts for Graham’s results, but, if taken
proportional to density, differs from those results very much. This
seems rather a curious result, and an additional phenomenon, explained
by the “collision of particles” theory of gases. Still one phenomenon
goes against that theory—the relation between specific heat at
constant pressure and at constant volume, which is in air = 1·408,
while it ought to be 1·333.</p>

<p>My brother-in-law, who is still with us, is getting better, and had his
first walk on crutches to-day across the room.</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>8 Palace Gardens Terrace,<br>
London W., 18th February 1862.</i></p>

<p class="right">(<i>Recd. 3d March</i>)</p>

<p>I got your letter in Scotland, whither we had gone for the Christmas
holidays. I have been brewing Platonic suds, but failed, owing I
suppose to a too low temperature. I had not read Plateau’s recipe then.
Some of the bubbles on the surface lasted a fortnight in the air, but
they were scummy and scaly and inelastic. I shall take more care next
time. Elliot of the Strand (30) is going to produce colour-tops, with
papers from De La Rue, and directions for use by me; and so I shall be
put in competition with the brass Blondin and the Top on the top of the
Top.</p>
</div>

<p><span class="pagenum" id="Page_333">[Pg 333]</span></p>

<div class="blockquot">

<p>... With regard to Britomart’s nurse—I have not Spenser here, but
I think Spenser was not a magician himself, and got all his black
art out of romances and not out of the professional treatises,—the
notions to be brought out were:—1st, The unweaving any web in which
B. had been caught; 2d, Doing so in witch-like fashion; 3d, Not like
a wicked witch, but like a well-intentioned nurse, unused to the art,
and therefore blunderingly. She believes in the number three and in
contrariety, and therefore says everything thrice and does everything
thrice, saying inversions of sentences, and doing reversions of her
revolutions, which are described in similar language. The revolutions
begin by + 3 (2\(pi\)) against the visible motion of the sun, then by a
revolution - (6\(pi\)) she returns all contrary and unweaves the first.
Then she goes round + (6\(pi\)), to make the final result contrary to
the natural revolution, and to make a complete triad. Withershins is,
I believe, equivalent to wider die Sonne in High Dutch, which I am not
aware is a modern or ancient idiom in that language, but it may be one
in a cognate language. If the “phamplets” have not turned up in Madeira
yet, let me know, that I may “replace” them.</p>

<p>I suppose in your equations, when the numbers do not amount to unity,
Black has been present.
\[
\cdot 841 \text{Brunsw}. \mathrm{G}+\cdot 159 \mathrm{W}=\cdot 200 \mathrm{V}+\cdot 423 \mathrm{U}+\cdot 377 \text{Black}.
\]</p>

<p>That is, green a little palish and dark mauve, your last
equation by the young eyes. It is something like a colour-blind
\(\mathrm{eq}^{\mathrm{n}}\), but all those I know say 100 Brunswick
G = 100 Vermillion, so that this person sees the green darker than
the Vermillion, or in other words sees much more of the second side
of the equation than a colour-blind person would. But in twilight
\(\mathrm{U}\) comes out strong, while \(\mathrm{G}\) does not; so that
I think the apparent equality arises from suppression of all colours
but blue (in \(\mathrm{U}\) and \(\mathrm{U}\)) in the twilight, so
that you may write—
\[
\cdot 841 \text{Black} + \cdot 159 \mathrm{W}=\cdot 577 \text{Black} +\cdot 423 \mathrm{U}
\]</p>

<p>There is no use going to the \(3^{\text{rd.}}\) place of decimals,
unless you spend a good while on each observation, and have first-rate<span class="pagenum" id="Page_334">[Pg 334]</span>
eyes. But if you can get observations to be consistent to the
\(3^{\text{rd.}}\) place of decimals, glory therein, and let me know
what the human eye can do.</p>

<p>Donkin gave me tea in Oxford, July 1, 1860.</p>

<p>I find that my belief in the reality of State affairs is no greater
in London than in Aberdeen, though I can see the clock at Westminster
on a clear day. If I went and saw the parks of artillery at Woolwich,
and the Consols going up and down in the city, and the Tuscarora and
Mr. Mason, I would know what like they were, but otherwise a printed
statement is more easily appropriated than experience is acquired by
being near where things are being transacted.</p>

<p>I am getting a large box made for mixture of colours. A beam of
sunlight is to be divided into colours by a prism, certain colours
selected by a screen with slits. These gathered by a lens, and restored
to the form of a beam by another prism, and then viewed by the eye
directly. I expect great difficulties in getting everything right
adjusted, but when that is done I shall be able to vary the intensity
of the colours to a great extent, and to have them far purer than by
any arrangement in which white light is allowed to fall on the final
prism.</p>

<p>I am also planning an instrument for measuring electrical effects
through different media, and comparing those media with air. A and B
are two equal metal discs, capable of motion towards each other by
fine screws; D is a metal disc suspended between them by a spring,
C; E is a piece of glass, sulphur, vulcanite, gutta-percha, etc. A
and B are then connected with a source of + electricity, and D with -
electricity. If everything was symmetrical, D would be attracted both
ways, and would be in unstable equilibrium, but this is rendered stable
by the elasticity of the spring G. To find the effect of the plate E,
you work A further or nearer till there is no motion of D consequent on
electrification. Then the plate of air between A and D is electrically
equivalent to the two plates of air and one of glass (say) between D
and B, whence we deduce the \(\mathrm{coeff}^{\mathrm{t.}}\) for E.</p>
</div>

<p><span class="pagenum" id="Page_335">[Pg 335]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Rev. Lewis Campbell.</span></p>

<p class="right"><i>8 Palace Gardens Terrace,<br>
Kensington, W, 21st April 1862.</i></p>

<p>It is now a long time since I wrote half a letter to you, but I have
never since had time to write or to find the scrap. I suppose, as it
was more than a good intention, but less than a perfect act, it may be
regarded as destined to paper purgatory. This is the season of work to
you, when folks visit shrines in April and May, but I get holiday this
week. I have been putting together a large optical box, 10 feet long,
containing two prisms of bisulphuret of carbon, the largest yet made
in London, five lenses and two mirrors, and a set of movable slits.
Everything requires to be adjusted over and over again if one thing is
not quite right placed, so I have plenty of trial work to do before it
is perfect, but the colours are most splendid.</p>

<p>I think you asked me once about Helmholtz and his philosophy. He is
not a philosopher in the exclusive sense, as Kant, Hegel, Mansel are
philosophers, but one who prosecutes physics and physiology, and
acquires therein not only skill in discovering any desideratum, but
wisdom to know what are the desiderata, <i>e.g.</i>, he was one of the
first, and is one of the most active, preachers of the doctrine that
since all kinds of energy are convertible, the first aim of science
at this time should be to ascertain in what way particular forms of
energy can be converted into each other, and what are the equivalent
quantities of the two forms of energy.</p>

<p>The notion is as old as Descartes (if not Solomon), and one statement
of it was familiar to Leibniz. It was wholly unknown to Comte, but all
sorts of people have worked at it of late,—Joule and Thomson for heat
and electricals, Andrews for chemical combinations, Dr. E. Smith for
human food and labour. We can now assert that the power of our bodies
is generated in the muscles, and is not conveyed to them by the nerves,
but produced during the transformation of substances in the muscle,
which are supplied fresh by the blood.</p>

<p>We can also form a rough estimate of the efficiency of<span class="pagenum" id="Page_336">[Pg 336]</span> a man as a mere
machine, and find that neither a perfect heat engine nor an electric
engine could produce so much work and waste so little in heat. We
therefore save our pains in investigating any theories of animal power
based on heat and electricity. We see also that the soul is not the
direct moving force of the body. If it were, it would only last till
it had done a certain amount of work, like the spring of a watch,
which works till it is run down. The soul is not the mere mover. Food
is the mover, and perishes in the using, which the soul does not.
There is action and reaction between body and soul, but it is not of a
kind in which energy passes from the one to the other,—as when a man
pulls a trigger it is the gunpowder that projects the bullet, or when
a pointsman shunts a train it is the rails that bear the thrust. But
the constitution of our nature is not explained by finding out what it
is not. It is well that it will go, and that we remain in possession,
though we do not understand it.</p>

<p>Hr. Clausius of Zurich, one of the heat philosophers, has been working
at the theory of gases being little bodies flying about, and has found
some cases in which he and I don’t tally, so I am working it out again.
Several experimental results have turned up lately, rather confirmatory
than otherwise of that theory.</p>

<p>I hope you enjoy the absence of pupils. I find that the division of
them into smaller classes is a great help to me and to them; but the
total oblivion of them for definite intervals is a necessary condition
of doing them justice at the proper time.</p>


<p class="nindc"><span class="allsmcap">To Fleeming Jenkin, Esq.</span><a id="FNanchor_213" href="#Footnote_213" class="fnanchor">[213]</a></p>

<p class="right"><i>27th Aug. 1863.</i></p>

<p>... To compare electromagnetic with electrostatic units:—</p>

<p>1<i>st</i>, Weber’s method.—Find the capacity of a condenser in
electrostatic measure (meters).</p>
</div>

<p><span class="pagenum" id="Page_337">[Pg 337]</span></p>

<div class="blockquot">

<p>Determine its potential when charged, and measure the charge of
discharge through a galvanometer.</p>

<p>2<i>d</i>, Thomson’s.—Find the electromotive force of a battery by
electromagnetic methods, and then weigh the attraction of two surfaces
connected with the two poles.</p>

<p>3<i>d</i>, (Not tried, but talked of by Jenkin).—Find the resistance
of a very bad conductor in both systems—</p>

<p>(1) By comparison with (4th June),</p>

<p>(2) By the log. decrement of charge per second.</p>

<p>All the methods require a properly graduated series of steps. The 1st
and 2d determine V, a velocity = 310,740,000 meters per second.</p>

<p>The 3d method determines \(\mathrm{V}^{2}\).</p>

<p>The first method requires a condenser of large capacity, and
the measurement of this capacity and that of the discharge by a
galvanometer.</p>

<p>I think this method looks the best; but I would use a much larger
condenser than Weber, and determine its capacity by more steps.</p>

<p>The chief difficulty of Thomson’s method is the measurement of a very
small force and a very small distance. I think these difficulties may
be overcome by making the force act on a comparatively stiff spring and
magnifying optically the deflection.</p>

<p>On the third method we require a very large condenser indeed, also
a series of resistances in steps between 4th June and that of the
insulating substance of the condenser, and a galvanometer (or
electrometer) to measure discharge (or tension)....</p>


<p class="nindc"><span class="allsmcap">To C. H. Cay, Esq.</span></p>

<p class="right"><i>8 Palace Gardens Terrace,<br>
18th November 1863.</i></p>

<p>We hope to hear how you are. A little literature helps to chase away
mathematics from the mind. I have read <i>Paracelsus</i> in parts, but
concluded that there was a great deal of poetry in it; but Mr. Browning
has written much better poems with half the quantity of poetry at his
disposal.<span class="pagenum" id="Page_338">[Pg 338]</span> Have you seen <i>Pessimus, a Prose Poem in Paradox</i>,
from Oxford, and <i>Sketch from Cambridge</i> by a Don who imagines
that mathematical men are safer not to talk shop than classical. I
know several men who see all nature in symbols, and express themselves
conformably whether in Quintics or Quantics, Invariants or Congruents.
I send you the electric scheme.</p>


<p class="nindc"><span class="allsmcap">To his Wife.</span></p>

<p class="right"><i>22d June 1864.</i></p>

<p>May the Lord preserve you from all evil, and cause all the evil that
assaults you to work out His own purposes, that the life of Jesus may
be made manifest in you, and may you see the eternal weight of glory
behind the momentary lightness of affliction, and so get your eyes off
things seen and temporal, and be refreshed with the things eternal! How
love is an eternal thing, and love between father and son or husband
and wife is not temporal if it be the right sort, for if the love of
Christ and the Church be a reason for loving one another, and if the
one be taken as an image of the other, then, if the mind of Christ be
in us, it will produce this love as part of its complete nature, and it
cannot be that the love which is first made holy, as being a reflection
of part of the glory of Christ, can be any way lessened or taken away
by a more complete transformation into the image of the Lord.</p>

<p>I have been back at 1 Cor. <span class="allsmcap">XIII</span>. I think the description of
charity or divine love is another loadstone for our life—to show us
that this is one thing which is not in parts, but perfect in its own
nature, and so it shall never be done away. It is nothing negative,
but a well-defined, living, almost acting picture of goodness; that
kind of it which is human, but also divine. Read along with it 1 John
<span class="allsmcap">IV.</span>, from verse 7 to end; or, if you like, the whole epistle
of John and Mark <span class="allsmcap">XII.</span> 28.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>23d June 1864.</i></p>

<p>Think what God has determined to do to all those who<span class="pagenum" id="Page_339">[Pg 339]</span> submit themselves
to His righteousness and are willing to receive His gift. They are to
be conformed to the image of His Son, and when that is fulfilled, and
God sees that they are conformed to the image of Christ, there can be
no more condemnation, for this is the praise which God Himself gives,
whose judgment is just. So we ought always to hope in Christ, for as
sure as we receive Him now, so sure will we be made conformable to
His image. Let us begin by taking no thought about worldly cares, and
setting our minds on the righteousness of God and His kingdom, and then
we shall have far clearer views about the worldly cares themselves,
and we shall be continually enabled to fight them under Him who has
overcome the world.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>26th June 1864.</i></p>

<p>Note in (2 Cor.) ver. 10 that the judgment is according to what we have
done, so that if we are to be counted righteous, we must really get
righteousness and do it. Note also that we are to receive the things
done in the body, not rewards or punishments merely, but the things
themselves are to be brought back to us, and we must meet them in the
spirit of Christ, who bore our sins and abolished them, or else we must
be overwhelmed altogether.</p>

<p>... I have come from Mr. Baptist Noel. The church was full to standing,
and the whole service was as plain as large print. The exposition was
the Parable of Talents, and the sermon was on John <span class="allsmcap">III.</span> 16.
The sermon was the text writ large, nothing ingenious or amusing,
and hardly any attempt at instruction, but plain and very serious
exhortation from a man who evidently believes neither more nor less
than what he says.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>28th June 1864.</i></p>

<p>I can always have you with me in my mind—why should we not have our
Lord always before us in our minds, for we have His life and character
and mind far more clearly described than we can know any one here? If
we had seen<span class="pagenum" id="Page_340">[Pg 340]</span> Him in the flesh we should not have known Him any better,
perhaps not so well. Pray to Him for a constant sight of Him, for He is
man that we may be able to look to Him, and God, so that He can create
us anew in His own image.</p>


<p class="nindc"><span class="allsmcap">To C. Hockin, Esq.</span></p>

<p class="right">Glenlair, Dalbeattie, September 7th 1864.</p>

<p>... I have been doing several electrical problems. I have got a theory
of “electric absorption,” <i>i.e.</i> residual charge, etc., and I
very much want determinations of the specific induction, electric
resistance, and absorption of good dielectrics, such as glass,
shell-lac, gutta-percha, ebonite, sulphur, etc.</p>

<p>I have also cleared the electromagnetic theory of light from all
unwarrantable assumption, so that we may safely determine the velocity
of light by measuring the attraction between bodies kept at a given
difference of potential, the value of which is known in electromagnetic
measure.</p>

<p>I hope there will be resistance coils at the British Association.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span><a id="FNanchor_214" href="#Footnote_214" class="fnanchor">[214]</a></p>

<p class="right"><i>8 Palace Gardens Terrace,<br>
London, W., 22d November 1864.</i></p>

<p>It was very kind of you to think of me at this time, and write to me. I
shall always remember your mother’s kindness to me, beginning more than
twenty-three years ago, and how she made me the same as you two when I
came to see you. To you her memory is what you can share with none, so
I can say no more except that you will continue to find that to have
had a mother so devoted to her duty gives you a consciousness of your
own obligations which will be strengthened whenever you think of her.</p>
</div>

<p><span class="pagenum" id="Page_341">[Pg 341]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To C. H. Cay, Esq.</span></p>

<p class="right"><i>Glenlair, 5th January 1865.</i></p>

<p>We are sorry to hear you cannot come and see us, but you seem better
by your letter, and I hope you will be able for your travels, and be
better able for your work afterwards, and not take it too severely,
and avoid merimnosity and taking over too much thought, which greatly
diminishes the efficiency of young teachers. We have been here since
22d ult., and are in the process of dining the valley in appropriate
batches. We have had very rough weather this week, which, combined with
the dining, has prevented our usual airings. The ordinary outing is to
the Brig of Urr, Katherine on Charlie and I on Darling. Charlie has got
a fine band on his forehead, with his name in blue and white beads.</p>

<p>The Manse of Corsock is now finished; it is near the river, not far
from the deep pool where we used to bathe.</p>

<p>I set Prof. W. Thomson a prop, which I had been working with for a
long time. He sent me 18 pages of letter of suggestions about it, none
of which would work; but on Jan 3, in the railway from Largs, he got
the way to it, which is all right; so we are jolly, having stormed the
citadel, when we only hoped to sap it by approximations.</p>
</div>

<figure class="figcenter width500" id="i_379a" style="width: 300px;">
<img src="images/i_379a.jpg" width="300" height="132" alt="A simple
line diagram showing a grid of curved lines forming a flow-field or
field-line pattern, with horizontal parallel lines on either side
converging and curving around a central point or obstacle in the
middle.">
</figure>

<div class="blockquot">

<p>The prop, was to draw a set of lines like this so that the ultimate
reticulations shall all be squares.</p>
</div>

<figure class="figcenter width500" id="i_379b" style="width: 300px;">
<img src="images/i_379b.jpg" width="300" height="127" alt="A simple
line diagram showing a vertical line labeled D intersecting a
horizontal arrangement of parallel bars or plates labeled B, A, and C,
resembling a layered or stacked structure.">
</figure>

<p><span class="pagenum" id="Page_342">[Pg 342]</span></p><div class="blockquot">

<p>The solution is exact, but rather stiff. Now I have a disc A hung by
a wire D, between two discs B, C, the interval being occupied by air,
hydrogen, carbonic acid, etc., the friction of which gradually brings
A to rest. In order to calculate the thickdom or viscosity of the gas,
I require to solve the problem above mentioned, which is now done,
and I have the apparatus now ready to begin. We are also intent on
electrical measurements, and are getting up apparatus, and have made
sets of wires of alloy of platinum and silver, which are to be sent all
abroad as standards of resistance. I have also a paper afloat, with an
electro-magnetic theory of light, which, till I am convinced to the
contrary, I hold to be great guns.</p>

<p>Spice<a id="FNanchor_215" href="#Footnote_215" class="fnanchor">[215]</a> is becoming first-rate: she is the principal patient under
the ophthalmoscope, and turns her eyes at command, so as to show the
tapetum, the optic nerve, or any required part. Dr. Bowman, the great
oculist, came to see the sight, and when we were out of town he came
again and brought Donders of Utrecht with him to visit Spice.</p>


<p class="nindc"><span class="allsmcap">To H. R Droop, Esq.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 19th July 1865.</i></p>

<p>There are so many different forms in which Societies may be cast, that
I should like very much to hear something of what those who have been
thinking about it propose as the plan of it.</p>

<p>There is the association for publishing each other’s productions; for
delivering lectures for the good of the public and the support of the
Society; for keeping a reading room or club, frequented by men of a
particular turn; for dining together once a month, etc.</p>

<p>I suppose W——’s object is to increase the happiness of men in London
who cultivate physical sciences, by their meeting together to read
papers and discuss them, the publication of these papers being only
one, and not the chief end of the Society, which fulfils its main
purpose in the act of meeting and enjoying itself.</p>
</div>

<p><span class="pagenum" id="Page_343">[Pg 343]</span></p>

<div class="blockquot">

<p>The Royal Society of Edinburgh used to be a very sociable body, but it
had several advantages. Most of the fellows lived within a mile of the
Society's rooms. They did not need to disturb their dinner arrangements
in order to attend.</p>

<p>Many of them were good speakers as well as sensible men, whose mode of
considering a subject was worth hearing, even if not correct.</p>

<p>The subjects were not limited to mathematics and physics, but included
geology, physiology, and occasionally antiquities and even literary
subjects. Biography of deceased fellows is still a subject of papers.
Now those who cultivate the mathematical and physical sciences are
sometimes unable to discuss a paper, because they would require to keep
it some days by them to form an opinion on it, and physical men can
get up a much better discussion about armour plates or the theory of
glaciers than about the conduction of heat or capillary attraction.</p>

<p>The only man I know who can make everything the subject of discussion
is Dr. Tyndall. Secure his attendance and that of somebody to differ
from him, and you are all right for a meeting.</p>

<p>If we can take the field with a plan in our head, I dare say we could
find a good many men who would co-operate.</p>

<p>We ride every day, sometimes both morning and evening, and so we
consume the roads. I have made 68 problems, all stiff ones, not
counting riders.</p>

<p>I am now getting the general equations for the motion of a gas
considered as an assemblage of molecules flying about with great
velocity. I find they must repel as inverse fifth power of distance.</p>


<p class="nindc"><span class="allsmcap">To C. H. Cay, Esq.</span></p>

<p class="right"><i>Glenlair, 14th October 1865.</i></p>

<p>... I hope you keep your conscience in good order, and do not bestow
more labour on erroneous papers than is useful to the youth who
wrote it. Always set him to look for the mistake, if he prefers that
to starting fresh, for to find your<span class="pagenum" id="Page_344">[Pg 344]</span> own mistake may sometimes be
profitable, but to seek for another man’s mistake is weariness to the
flesh.</p>

<p>There are three ways of learning props.—the heart, the head, and
the fingers; of these the fingers is the thing for examinations,
but it requires constant practice. Nevertheless the fingers have
a fully better retention of methods than the heart has. The head
method requires about a mustard seed of thought, which, of course, is
expensive, but then it takes away all anxiety. The heart method is
full of anxiety, but dispenses with the thought, and the finger method
requires great labour and constant practice, but dispenses with thought
and anxiety together.</p>

<p>We have had very fine weather since you went away, but I was laid up
for more than three weeks with erysipelas all over my head, and got
very shaky on my pins. But I have been out for a fortnight, and riding
regularly as of old, which is good for Katherine after the nursing, and
I eat about double what any man in Galloway does, and know nothing of
it in half an hour; but my legs are absorbing the beef as fast as it is
administered.</p>


<p class="nindc"><span class="allsmcap">To the Rev. C. B. Tayler.</span></p>

<p class="right"><i>8 Palace Gardens Terrace, W.,<br>
2d February 1866.</i></p>

<p>I was very glad to get your kind letter, and to be assured that you
still remembered me. I thought of you when I was in Cambridge, and
made up my mind to write to you and hear of you and Mrs. Tayler, and
your nephew George. A nephew of yours was for a short time in my class
in King’s Coll., and I asked him about you, but he had not seen you
lately. Is George still in Hull?</p>

<p>You ask for my history since I wrote to you before my marriage. We
remained in Aberdeen till 1860, when the union or fusion of the
Colleges took place, and I went to King’s Coll., London, where I
taught till last Easter, when I was succeeded by W. G. Adams, brother
of the astronomer. I have now my time fully occupied with experiments
and speculations of a physical kind, which I could not undertake<span class="pagenum" id="Page_345">[Pg 345]</span> as
long as I had public duties. These are the chronological data. It is
13 years nearly since I was with you, and you carried me about when
I could not move myself, but I remember everything about you and
Otley much better than most things before and after that time. I got
advantage from your nursing when my father was ill, and many other
things have since brought you and Mrs. Tayler to mind. If you and Mrs.
Tayler are to be in London during the spring, we shall be exceedingly
glad to see you here, or if you ever go to Scotland in summer or
autumn, we hope you will try and stay with us some time. My wife knows
you quite well,—that is, as well as I do,—all but what can only be
got by seeing and hearing directly, and it would do us both great good
to see you, and open up our minds a little.</p>

<p>Many people’s minds seem to be shut up with solemn charms, so that
though they seem Christians, and know what they mean to speak about,
they can say nothing. At Cambridge I heard several sermons from
excellent texts, but all either on other subjects or else right against
the text. There is a Mr. Offord in this street, a Baptist<a id="FNanchor_216" href="#Footnote_216" class="fnanchor">[216]</a> who
knows his Bible, and preaches as near it as he can, and does what he
can to let the statements in the Bible be understood by his hearers.
We generally go to him when in London, though we believe ourselves
baptized already.</p>
</div>

<div class="blockquot">

<p>Pray let me hear from you occasionally. We shall be here till the end
of March, and after that address Glenlair, Dalbeattie, N.B., which is
my permanent address, and is sure at all times to find me.</p>

<p>Mrs. Maxwell joins me in kind regards to you and Mrs. Tayler, and I
remain your afft. friend,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 3d November 1868.</i></p>

<p>I have given considerable thought to the subject of the<span class="pagenum" id="Page_346">[Pg 346]</span> candidature,
and have come to the decision not to stand. The warm interest which
you and other professors have taken in the matter has gratified me
very much, and the idea of following Principal Forbes had also a great
effect on my feelings, as well as the prospect of residing among
friends; but I still feel that my proper path does not lie in that
direction.—Your afft. friend,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 6th July 1870.</i></p>

<p>My question to the Mathematical Society bore fruit in various forms....
It would give my mind too great a wrench just now to go into elliptic
integrals, but I will do so when I come to revise about circular
conductors. ... I can cut the subject short with an easy conscience,
for I have no scruple about steering clear of tables of double entry,
especially when, in all really useful cases, convergent series may
be used with less trouble, and without any knowledge of elliptic
integrals. On this subject see a short paper on Fluid Displacement in
next part of the <i>Math. Soc. Trans.</i>, where I give a picture of
the stream lines, and the distortion of a transverse line as water
flows past a cylinder.</p>

<p>Mr. W. Benson, architect, 147 Albany Street, Regent Park, N.W., told
me that you had been writing to <i>Nature</i>, and that yours was the
only rational statement in a multitudinous correspondence on colours.
Mr. Benson considers that Aristotle and I have correct views about
primary colours. He has written a book, with coloured pictures, on
the science of colour, and he shows how to mix colours by means of a
prism. He wants to publish an elementary book with easy experiments,
but gets small encouragement, being supposed an heretic. No other
architect in the Architect’s Society believes him. This is interesting
to me, as showing the chromatic condition of architects. I made a great
colour-box in 1862, and worked it in London in ’62 and ’64. I have
about 200 equations each year, which are<span class="pagenum" id="Page_347">[Pg 347]</span> reduced but not published. I
have set it up here this year, and have just got it in working order.
I expect to get some more material, and work up the whole together. In
particular, I want to find any change or evidence of constancy in the
eyes of myself and wife during eight years. I can exhibit the yellow
spot to all who have it,—and all have it except Col. Strange, F.R.S.,
my late father-in-law, and my wife,—whether they be Negroes, Jews,
Parsees, Armenians, Russians, Italians, Germans, Frenchmen, Poles,
etc. Professor Pole, for instance, has it as strong as me, though he
is colour-blind; Mathison, also colour-blind, being fair, had it less
strongly marked.</p>

<p>One J. J. Müller in <i>Pogg. Ann.</i> for March and April 1870,
examines compound colours, and finds the violet without any tendency
to red, or the red to blue. He also selects a typical green out of the
spectrum.</p>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_207" href="#FNanchor_207" class="label">[207]</a> 
<i>Reports of the Committee on Electrical Standards,
appointed by the British Association for the advancement of
Science</i>. Spon, London and New York, 1873.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_208" href="#FNanchor_208" class="label">[208]</a> 
Of Messrs. Elliott Brothers.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_209" href="#FNanchor_209" class="label">[209]</a> 
The following fragments have been found amongst his
papers:—</p>

<p>“Almighty God, who hast created man in Thine own image, and made him a
living soul that he might seek after Thee and have dominion over Thy
creatures, teach us to study the works of Thy hands that we may subdue
the earth to our use, and strengthen our reason for Thy service; and so
to receive Thy blessed Word, that we may believe on Him whom Thou hast
sent to give us the knowledge of salvation and the remission of our
sins. All which we ask in the name of the same Jesus Christ our Lord.”</p>

<p>“O Lord, our Lord, how excellent is Thy name in all the earth, who hast
set Thy glory above the heavens, and out of the mouths of babes and
sucklings hast perfected praise. When we consider Thy heavens, the work
of Thy fingers, the moon and the stars which Thou hast ordained, teach
us to know that Thou art mindful of us, and visitest us, making us
rulers over the works of Thy hands, showing us the wisdom of Thy laws,
and crowning us with honour and glory in our earthly life; and looking
higher than the heavens, may we see Jesus, made a little lower than
the angels for the suffering of death, crowned with glory and honour,
that He, by the grace of God, should taste death for every man. O Lord,
fulfil Thy promise, and put all things in subjection under His feet.
Let sin be rooted out of the earth, and let the wicked be no more.
Bless Thou the Lord, O my soul, praise the Lord.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_210" href="#FNanchor_210" class="label">[210]</a> 
The tone in which he spoke of this brought home to me,
more than anything I have seen in books, the joy of Michael Angelo in
etherealising the work of Brunelleschi.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_211" href="#FNanchor_211" class="label">[211]</a> 
On learning from our teacher, Sign. Briganti, the
pronunciation of <i>suolo</i>, he said, “That is the English for
<i>rondinella</i>.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_212" href="#FNanchor_212" class="label">[212]</a> 
It is right that I should add that the suggestion did
not proceed from me.—<i>L. C.</i></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_213" href="#FNanchor_213" class="label">[213]</a> 
Now Professor of Engineering in Edinburgh.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_214" href="#FNanchor_214" class="label">[214]</a> 
Mrs. Morrieson died on the 17th of November 1864.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_215" href="#FNanchor_215" class="label">[215]</a> 
The Scotch terrier of the period.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_216" href="#FNanchor_216" class="label">[216]</a> 
Whilst in London, Mr. and Mrs. Maxwell occasionally
attended Nonconformist services, partly led, perhaps, by recollections
of the simple Presbyterian worship, to which Mrs. Maxwell had been
accustomed.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_348">[Pg 348]</span></p>

<h2 class="nobreak" id="CHAPTER_XII">CHAPTER XII.<br>
<span class="allsmcap">CAMBRIDGE—1871 TO 1879.</span></h2>
</div>

<p class="nind">
THE Chair of Experimental Physics in the University of
Cambridge was founded by a Grace of the Senate on the 9th of February
1871.</p>

<p>In October 1870 the Duke of Devonshire, who was Chancellor of the
University, had signified his desire to build and furnish a Physical
Laboratory for Cambridge. In acting as a member of the Royal Commission
on Scientific Education, he had perceived how useful such an
institution might be made. It was in connection with the acceptance of
this munificent offer that the new professorship was established by the
Senate.</p>

<p>The question, who should be the first professor? was for some time
attended with anxiety. It was understood that Sir William Thomson had
declined to stand, and it was thought uncertain whether Clerk Maxwell
could be persuaded to leave the retirement of his country-seat. After
some hesitation, arising chiefly from genuine diffidence, he was
induced to become a candidate, on the understanding that he might
retire at the end of a year, if he wished to do so. His candidature was
announced on the 24th of<span class="pagenum" id="Page_349">[Pg 349]</span> February.<a id="FNanchor_217" href="#Footnote_217" class="fnanchor">[217]</a> There was no opposition, and
he was appointed on the 8th of March.</p>

<p>The following letters indicate the part taken by various persons in
bringing about this result:—</p>

<div class="blockquot">

<p class="nindc space-above2">
<span class="allsmcap">From the Hon. J. W. Strutt</span> (Lord Rayleigh).</p>

<p class="right"><i>Cambridge, 14th February 1871.</i></p>

<p>When I came here last Friday I found every one talking about the new
professorship, and hoping that you would come. Thomson, it seems,
has definitely declined.... There is no one here in the least fit
for the post. What is wanted by most who know anything about it is
not so much a lecturer as a mathematician who has actual experience
in experimenting, and who might direct the energies of the younger
Fellows and bachelors into a proper channel. There must be many who
would be willing to work under a competent man, and who, while learning
themselves, would materially assist him.... I hope you may be induced
to come; if not, I don’t know who it is to be. Do not trouble to answer
me about this, as I believe others have written to you about it.</p>


<p class="nindc"><span class="allsmcap">From the Rev. E. W. Blore, M.A.</span> (now Vice-Master
of Trinity).</p>

<p class="right"><i>14th February 1871.</i></p>

<p>Many residents of influence are desirous that you should occupy the
post, hoping that in your hands this University would hold a leading
place in this department. It has, I believe, been ascertained that Sir
W. Thomson would not accept the professorship. I mention this lest you
should wish to avoid the possibility of coming into the field against
him.</p>
</div>

<p><span class="pagenum" id="Page_350">[Pg 350]</span></p>

<p>Maxwells usual modesty is apparent in the draft of his reply to this
letter:—</p>

<div class="blockquot">

<p class="right"><i>Glenlair, Dalbeattie, 15th February 1871.</i></p>

<p><span class="allsmcap">My dear Blore</span>—Though I feel much interest in the proposed
Chair of Experimental Physics, I had no intention of applying for it
when I got your letter, and I have none now, unless I come to see that
I can do some good by it.</p>

<p>... I am sorry Sir W. Thomson has declined to stand. He has had
practical experience in teaching experimental work, and his
experimental corps have turned out very good work. I have no experience
of this kind, and I have seen very little of the somewhat similar
arrangements of a class of real practical chemistry. The class of
Physical Investigations, which might be undertaken with the help of
men of Cambridge education, and which would be creditable to the
University, demand, in general, a considerable amount of dull labour
which may or may not be attractive to the pupils.</p>
</div>

<p>In the Grace of Senate of 9th February, it had been enacted that it
should be “the principal duty of the professor to teach and illustrate
the laws of Heat, Electricity, and Magnetism; to apply himself to the
advancement of the knowledge of such subjects; and to promote their
study in the University.”</p>

<p>For some time after his appointment, Maxwell’s principal work was
that of designing and superintending the erection of the Cavendish
Laboratory.</p>

<p>He inspected the Physical Laboratories of Sir William Thomson at
Glasgow and of Professor Clifton at Oxford, in order to embody in the
new structure the best features of both of these institutions. But
many of the most important arrangements<span class="pagenum" id="Page_351">[Pg 351]</span> were of his own invention. An
account of the Laboratory itself will be found in <i>Nature</i> (vol.
<span class="allsmcap">X.</span> p. 139); it is sufficient here to say that it would be
difficult to imagine a building better adapted to its purpose, or one
in the construction of which more provision should be made for possible
requirements. In no case was convenience sacrificed to architectural
effect, but in both respects the building is a decided success. The
architect was Mr. W. M. Fawcett of Cambridge, who appears to have
fully appreciated and thoroughly carried out all Professor Maxwell’s
suggestions. The contract was given to Mr. Loveday of Kibworth, his
tender being recommended by the report of the Syndicate appointed to
superintend the building, dated 1st March 1872.</p>


<p class="space-above2">
The work of arranging and furnishing the Cavendish Laboratory occupied
a considerable time. It was not completed until the spring of 1874,
when the practical work of experimenting commenced, and on the 16th of
June in that year, the Chancellor formally presented his gift to the
University. Sir Charles Lyell and the French astronomer Leverrier were
among those who visited the Laboratory and received the honorary degree
of LL.D. from the University on that occasion.</p>

<p>The following draft of a letter from Maxwell to the Vice-Chancellor in
the previous year affords an interesting illustration of the thorough
and business-like manner in which he had addressed himself to these
preliminary labours.</p>

<p><span class="pagenum" id="Page_352">[Pg 352]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Vice-Chancellor, Cambridge.</span></p>

<p class="nindc">(<i>Draft of a Letter.</i>)</p>

<p class="right"><i>Glenlair, 5th July 1878.</i></p>

<p>I enclose a provisional list of fixtures and apparatus required for the
Laboratory.</p>

<p>At present I am not able to estimate the prices of many of the articles.</p>

<p>Some of them are in the market, and have simply to be ordered; others
require to be constructed specially for the Laboratory.</p>

<p>I have begun with a list arranged according to the places and rooms in
the Laboratory, but, of course, all small things must be kept in cases,
either in the apparatus room, or in the special rooms.</p>

<p>The special duty of the professor of experimental physics is to teach
the sciences of heat and electricity, and also to encourage physical
research. The Laboratory must therefore contain apparatus for the
illustration of heat and electricity, and also for whatever physical
research seems most important or most promising.</p>

<p>The special researches connected with heat which I think most deserving
of our efforts at the present time are those relating to the elasticity
of bodies, and in general those which throw light on their molecular
constitution; and the most important electrical research is the
determination of the magnitude of certain electric quantities, and
their relations to each other.</p>

<p>These are the principles on which I have been planning the arrangement
of the Laboratory. But if in the course of years the course of
scientific research should he deflected, the plans of work must vary
too, and the rooms must be allotted differently.</p>

<p>I agree with you that the income of the Museums must be largely
increased in order to meet the demands of this and other new buildings,
and I am glad that the University is able to increase it.</p>

<p>It is impossible to procure many of the instruments, as<span class="pagenum" id="Page_353">[Pg 353]</span> they are
not kept in stock, and have to be made to order. Some of the most
important will require a considerable amount of supervision during
their construction, for their whole value depends on their fulfilling
conditions which can as yet be determined only by trial, so that it may
be some time before everything is in working order.</p>
</div>

<p>Even in 1874, however, there were still manifold desiderata, and the
Duke expressed his wish to furnish the Laboratory completely with the
necessary apparatus. To carry out this wish was again a work of time,
for the Professor would never order an important instrument until he
was satisfied that its design and construction were the best that could
be obtained. In his annual report to the University in 1877 Professor
Maxwell announced that the Chancellor had now “completed his gift to
the University, by furnishing the Cavendish Laboratory with apparatus
suited to the present state of science;” but at the same time he wrote
to the Vice-Chancellor stating that he should reserve to himself
the privilege of presenting to the Laboratory such apparatus as the
advancement of science might render it desirable for the University
to possess. And during the short remainder of his tenure of the
professorship he expended many hundreds of pounds in this manner. And
already, in the spring of 1874, he had presented to the Laboratory all
the apparatus in his own possession. The apparatus provided by the
British Association for their Committee on Electrical Standards (see
p. 316), was also deposited in the Laboratory, in accordance with a
resolution passed at the Edinburgh Meeting of 1871—the<span class="pagenum" id="Page_354">[Pg 354]</span> apparatus
remaining the property of the Association, and subject to the control
of the Committee.</p>


<p class="space-above2">
While the Laboratory was thus gradually made available, the other work
of the professorship went on uninterruptedly from the first. Maxwell
gave annual courses of lectures on the subjects prescribed in his
commission,<a id="FNanchor_218" href="#Footnote_218" class="fnanchor">[218]</a> commencing with October 1871, when he delivered his
inaugural lecture. This and the lecture “On Colour Vision,” given at
the Royal Institution shortly after his appointment in the preceding
spring, are perhaps the happiest of his literary efforts. Philosophic
grasp, scientific clearness, and poetic imagination could hardly be
more successfully combined.</p>

<p>The Cambridge lecture (October 1871) sets forth in luminous outline the
meaning and tendency of the moment in the evolution of the University
of Cambridge, which was marked by the institution of the<span class="pagenum" id="Page_355">[Pg 355]</span> course of
Experimental Physics, and the erection of the Devonshire Laboratory.</p>

<p>The following passage is especially characteristic:—</p>

<div class="blockquot">

<p>Science appears to us with a very different aspect after we have found
out that it is not in lecture-rooms only, and by means of the electric
light projected on a screen, that we may witness physical phenomena,
but that we may find illustrations of the highest doctrines of science
in games and gymnastics, in travelling by land and by water, in storms
of the air and of the sea, and wherever there is matter in motion.</p>

<p>This habit of recognising principles amid the endless variety of their
action can never degrade our sense of the sublimity of nature, or
mar our enjoyment of its beauty. On the contrary, it tends to rescue
our scientific ideas from that vague condition in which we too often
leave them, buried among the other products of a lazy credulity, and
to raise them into their proper position among the doctrines in which
our faith is so assured that we are ready at all times to act on them.
Experiments of illustration may be of very different kinds. Some may be
adaptations of the commonest operations of ordinary life; others may
be carefully arranged exhibitions of some phenomenon which occurs only
under peculiar conditions. They all, however, agree in this, that their
aim is to present some phenomenon to the senses of the student in such
a way that he may associate with it some appropriate scientific idea.
When he has grasped this idea, the experiment which illustrates it has
served its purpose.</p>

<p>In an experiment of research, on the other hand, this is not the
principal aim.... Experiments of this class—those in which measurement
of some kind is involved—are the proper work of a physical laboratory.
In every experiment we have first to make our senses familiar with the
phenomenon; but we must not stop here,—we must find out which of its
features are capable of measurement, and what measurements are required
in order to make a complete specification<span class="pagenum" id="Page_356">[Pg 356]</span> of the phenomenon. We must,
then, make these measurements, and deduce from them the result which we
require to find.</p>

<p>This characteristic of modern experiments—that they consist
principally of measurements—is so prominent that the opinion seems to
have got abroad that, in a few years, all the great physical constants
will have been approximately estimated, and that the only occupation
which will then be left to men of science will be to carry these
measurements to another place of decimals.</p>

<p>If this is really the state of things to which we are approaching, our
Laboratory may perhaps become celebrated as a place of conscientious
labour and consummate skill; but it will be out of place in the
University, and ought rather to be classed with the other great
workshops of our country, where equal ability is directed to more
useful ends.</p>

<p>But we have no right to think thus of the unsearchable riches of
creation, or of the untried fertility of those fresh minds into which
these riches will continually be poured.... The history of science
shows that even during that phase of her progress in which she devotes
herself to improving the accuracy of the numerical measurement of
quantities with which she has long been familiar, she is preparing the
materials for the subjugation of new regions, which would have remained
unknown if she had been contented with the rough methods of her early
pioneers.</p>
</div>

<p>The movement which was now to receive so great an impulse may be
roughly dated from Sir William Thomsons first appearance as a Public
Examiner in Cambridge; and Maxwell's own influence, as Examiner and
Moderator, had been mainly instrumental in promoting it. The nature
of the change has been described as follows by one whose University
experience reaches back into the previous time:—</p>

<p><span class="pagenum" id="Page_357">[Pg 357]</span></p><div class="blockquot">

<p>The style of mathematics which was popular in Cambridge for some time
before was, to say the least, one-sided, and one-sided in a somewhat
unproductive direction. There were many complaints that Cambridge
was behind the rest of the scientific world, and that, whereas the
students of so many other Universities were introduced to the splendid
discoveries of such subjects as Electricity and Heat, the Wranglers
of Cambridge spent their time upon mathematical trifles and problems,
so-called, barren alike of practical results and scientific interest.
Maxwell’s questions (as Moderator in 1866) infused fresh life into
the Cambridge Tripos, and, therefore, into the University studies, by
the number of original ideas and new lines of thought opened up by
them, thus preparing for the change of system in 1873, when so many
interesting subjects were added to the Examination.</p>
</div>

<p>Sir William Thomson gives the following important testimony to the same
effect:—</p>

<div class="blockquot">

<p class="right"><i>The University, Glasgow,<br>
21st January 1882.</i></p>

<p>The influence of Maxwell at Cambridge had undoubtedly a great effect in
directing mathematical studies into more fruitful channels than those
in which they had been running for many years. His published scientific
papers and books, his action as an examiner at Cambridge, and his
professorial lectures, all contributed to this effect; but above all,
his work in planning and carrying out the arrangements of the Cavendish
Laboratory. There is, indeed, nothing short of a revival of Physical
Science at Cambridge within the last fifteen years, and this is largely
due to Maxwell’s influence.</p>
</div>

<p>Evidence might easily be multiplied, but it is enough to quote the
weighty words of Lord Rayleigh at a recent public meeting at Cambridge
in support of the proposed Devonshire Memorial:—</p>

<p><span class="pagenum" id="Page_358">[Pg 358]</span></p><div class="blockquot">

<p>It was no little thing to have had Professor Maxwell so closely
connected with Cambridge, for by his genius effects were produced which
could hardly have been produced in any other way. Before coming there
to occupy the position he then held, he (Lord Rayleigh) had not given
any particular attention to electricity, but he found Cambridge to be
so saturated with the subject that he quickly came to the conclusion
that it would be best to make it his particular study. All this was
owing to the influence of Maxwell.<a id="FNanchor_219" href="#Footnote_219" class="fnanchor">[219]</a></p>
</div>


<p class="space-above2">
While speaking of his work in lecturing, it may be well briefly to
advert to the famous “Discourse on Molecules,” delivered before the
British Association at Bradford in September 1873, which has been more
often quoted than, perhaps, any other of his writings. This address
was extremely rich in scientific matter, but its chief interest lay in
the concluding paragraphs, which may be said to indicate more clearly
than any other of Maxwell’s writings the position of his mind towards
certain doctrines maintained by scientific men:—</p>

<div class="blockquot">

<p>In the heavens we discover by their light, and by their light alone,
stars so distant from each other that no material thing can ever have
passed from one to another;<span class="pagenum" id="Page_359">[Pg 359]</span> and yet this light, which is to us the
sole evidence of the existence of these distant worlds, tells us also
that each of them is built up of molecules of the same kinds as those
which we find on earth. A molecule of hydrogen, for example, whether in
Sirius or in Arcturus, executes its vibrations in precisely the same
time.</p>

<p>Each molecule therefore throughout the universe bears impressed upon
it the stamp of a metric system as distinctly as does the metre of the
Archives at Paris, or the double royal cubit of the temple of Karnac.</p>

<p>No theory of evolution can be formed to account for the similarity of
molecules, for evolution necessarily implies continuous change, and the
molecule is incapable of growth or decay, of generation or destruction.</p>

<p>None of the processes of Nature, since the time when Nature began, have
produced the slightest difference in the properties of any molecule. We
are therefore unable to ascribe either the existence of the molecules
or the identity of their properties to any of the causes which we call
natural.</p>

<p>On the other hand, the exact equality of each molecule to all others
of the same kind gives it, as Sir John Herschel has well said, the
essential character of a manufactured article, and precludes the idea
of its being eternal and self-existent.</p>

<p>Thus we have been led, along a strictly scientific path, very near to
the point at which Science must stop,—not that Science is debarred
from studying the internal mechanism of a molecule which she cannot
take to pieces, any more than from investigating an organism which
she cannot put together. But in tracing back the history of matter,
Science is arrested when she assures herself, on the one hand, that the
molecule has been made, and, on the other, that it has not been made by
any of the processes we call natural.</p>

<p>Science is incompetent to reason upon the creation of matter itself
out of nothing. We have reached the utmost limits of our thinking
faculties when we have admitted that because matter cannot be eternal
and self-existent it must have been created.</p>
</div>

<p><span class="pagenum" id="Page_360">[Pg 360]</span></p>

<div class="blockquot">

<p>It is only when we contemplate, not matter in itself, but the form in
which it actually exists, that our mind finds something on which it can
lay hold.</p>

<p>That matter, as such, should have certain fundamental properties,—that
it should exist in space and be capable of motion,—that its motion
should be persistent, and so on,—are truths which may, for anything we
know, be of the kind which metaphysicians call necessary. We may use
our knowledge of such truths for purposes of deduction, but we have no
data for speculating as to their origin.</p>

<p>But that there should be exactly so much matter and no more in every
molecule of hydrogen is a fact of a very different order. We have here
a particular distribution of matter—a <i>collocation</i>—to use the
expression of Dr. Chalmers, of things which we have no difficulty in
imagining to have been arranged otherwise.</p>

<p>The form and dimensions of the orbits of the planets, for instance,
are not determined by any law of nature, but depend upon a particular
collocation of matter. The same is the case with respect to the size
of the earth, from which the standard of what is called the metrical
system has been derived. But these astronomical and terrestrial
magnitudes are far inferior in scientific importance to that most
fundamental of all standards which forms the base of the molecular
system. Natural causes, as we know, are at work, which tend to modify,
if they do not at length destroy, all the arrangements and dimensions
of the earth and the whole solar system. But though in the course of
ages catastrophes have occurred and may yet occur in the heavens,
though ancient systems may be dissolved and new systems evolved out of
their ruins, the molecules out of which these systems are built—the
foundation-stones of the material universe—remain unbroken and unworn.
They continue this day as they were created—perfect in number and
measure and weight; and from the ineffaceable characters impressed on
them we may learn that those aspirations after accuracy in measurement,
and justice in action, which we reckon among our noblest attributes as
men, are ours because they are<span class="pagenum" id="Page_361">[Pg 361]</span> essential constituents of the image of
Him who in the beginning created, not only the heaven and the earth,
but the materials of which heaven and earth consist.</p>
</div>

<p>In 1875 he read before the Chemical Society a paper “On the Dynamical
Evidence of the Molecular Constitution of Bodies.”</p>

<p>The lecture on Thermodynamics at the Loan Exhibition of Scientific
Apparatus in London in 1876 (to which he had contributed his
real-image Stereoscope, etc.), was illustrated by his own model of the
Thermodynamic Surface.<a id="FNanchor_220" href="#Footnote_220" class="fnanchor">[220]</a></p>

<p>The last of his public lectures was the Rede Lecture “On the
Telephone,” delivered at Cambridge in 1878, and illustrated with the
aid of Mr. Gower’s Telephonic Harp.</p>

<p>After pointing out the extreme simplicity as well as the absolute
novelty of the invention, he made it the text of a discourse which is
remarkable both for suggestiveness and discursiveness.</p>

<div class="blockquot">

<p>I shall ... consider the telephone as a material symbol of the widely
separated departments of human knowledge, the cultivation of which has
led, by as many converging paths, to the invention of this instrument
by Professor Graham Bell.</p>

<p>... In a University we are especially bound to recognise not only the
unity of Science itself, but the communion of<span class="pagenum" id="Page_362">[Pg 362]</span> the workers of Science.
We are too apt to suppose that we are congregated here merely to be
within reach of certain appliances of study, such as museums and
laboratories, libraries and lectures, so that each of us may study what
he prefers. I suppose that when the bees crowd round the flowers it
is for the sake of the honey that they do so, never thinking that it
is the dust which they are carrying from flower to flower which is to
render possible a more splendid array of flowers and a busier crowd of
bees in the years to come.</p>

<p>We cannot therefore do better than improve the shining hour in helping
forward the cross-fertilisation of the Sciences.</p>

<p>One great beauty of Professor Bell's invention is that the instruments
at the two ends of the line are precisely alike.... The perfect
symmetry of the whole apparatus—the wire in the middle, the two
telephones at the ends of the wire, and the two gossips at the ends of
the telephones, may be very fascinating to a mere mathematician, but it
would not satisfy the evolutionist of the Spenserian type, who would
consider anything with both ends alike, such as the Amphisbæna, or
Mr. Bright’s terrier, or Mr. Bell’s telephone, to be an organism of a
very low type, which must have its functions differentiated before any
satisfactory integration can take place.</p>

<p>Accordingly many attempts have been made, by differentiating the
function of the transmitter from that of the receiver, to overcome the
principal limitation of the power of the telephone. As long as the
human voice is the sole motive power of the apparatus, it is manifest
that what is heard at one end must be fainter than what is spoken at
the other. But if the vibration set up at one end is used no longer
as the source of energy, but merely as a means of modulating the
strength of a current supplied by a voltaic battery, then there will
be no necessary limitation of the intensity of the resulting sound,
so that what is whispered to the transmitter may be proclaimed <i>ore
rotundo</i> by the receiver.</p>
</div>

<p><span class="pagenum" id="Page_363">[Pg 363]</span></p>

<p>He then briefly referred to Edison's loud-speaking telephone, and went
on to exhibit and explain the microphone of Professor Hughes.</p>

<div class="blockquot">

<p>I have said the telephone is an instance of the benefit to be derived
from the cross-fertilisation of the sciences. ... Professor Graham
Bell ... is the son of a very remarkable man, Alexander Melville Bell,
author of a book called <i>Visible Speech</i>, and of other works
relating to pronunciation. In fact his whole life has been employed in
teaching people to speak. He brought the art to such perfection that,
though a Scotchman, he taught himself in six months to speak English,
and I regret extremely that when I had the opportunity in Edinburgh
I did not take lessons from him.<a id="FNanchor_221" href="#Footnote_221" class="fnanchor">[221]</a> Mr. Melville Bell has made a
complete analysis and classification of all the sounds capable of
being uttered by the human voice, from the Zulu clicks to coughing and
sneezing; and he has embodied his results in a system of symbols, the
elements of which are not taken from any existing alphabet, but are
founded on the different configurations of the organs of speech.</p>
</div>

<div class="blockquot">

<p>... Helmholtz, by a series of daring strides, has effected a passage
for himself over that untrodden wild between acoustics and music—that
Serbonian bog where whole armies of scientific musicians and musical
men of science have sunk without filling it up.</p>

<p>We may not be able even yet to plant our feet in his tracks and follow
him right across—that would require the seven league boots of the
German Colossus; but to help us in Cambridge we have the Board of
Musical Studies vindicating for music its ancient place in a liberal
education. On the physical side we have Lord Rayleigh laying our
foundation deep and strong in his Theory of Sound. On the æsthetic<span class="pagenum" id="Page_364">[Pg 364]</span>
3side we have the University Musical Society doing the practical work,
and, in the space between, those conferences of Mr. Sedley Taylor,
where the wail of the Siren draws musician and mathematician together
down into the depths of their sensational being, and where the gorgeous
hues of the Phoneidoscope are seen to seethe and twine and coil like the</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Dragon boughts and elvish emblemings</div>
  </div>
</div>
</div>

<p class="nind">on the gates of that city, where</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">An ye heard a music, like enow</div>
    <div class="verse indent0">They are building still, seeing the city is built</div>
    <div class="verse indent0">To music, therefore never built at all</div>
    <div class="verse indent0">And therefore built for ever.</div>
  </div>
</div>
</div>

<p class="nind">The special educational value of this combined study of music and
acoustics is that more than almost any other study it involves a
continual appeal to what we must observe for ourselves.</p>

<p>The facts are things which must be felt; they cannot be learned from
any description of them.</p>

<p>All this has been said more than 200 years ago by one of our own
prophets, William Harvey of Gonville and Caius College:—“For whosoever
they be that read authors, and do not, by the aid of their own senses,
abstract true representations of the things themselves (comprehended
in the author’s expressions) they do not represent true ideas, but
deceitful idols and phantasmas; by which means they frame to themselves
certaine shadows and chimaeras, and all their theory and contemplation
(which they call science) represents nothing but waking men’s dreams
and sick men’s phrensies.”</p>
</div>

<p>After the opening of the Cavendish Laboratory in 1874, the most
continuous, as well as the most important, work of the Chair was the
superintendence of various courses of experiments, undertaken by young
aspirants for scientific distinction. With characteristic<span class="pagenum" id="Page_365">[Pg 365]</span> loyalty
and humility, Maxwell seems often to have taken more pride in their
researches than in his own. To enumerate the men who were thus favoured
would be to name many who are now amongst the most efficient teachers
of science in the United Kingdom. But there can be nothing invidious
in making particular mention of those who are named by Maxwell himself
in his correspondence, although the omission of other names may be
accidental. Besides Mr. W. Garnett, who was his demonstrator in the
Laboratory from first to last, he refers with especial satisfaction
to the work of Mr. George Chrystal, now Professor of Mathematics in
Edinburgh, and to that of Mr. W. D. Niven.</p>

<p>Mr. Chrystal was encouraged by him to undertake a series of experiments
for verifying Ohm’s Law respecting the relation between the current and
the electro-motive force in a wire, on which some doubt had been thrown
by Weber’s theories, and, in an opposite direction, by a series of
experiments reported to the British Association by Dr. Schuster in 1874.</p>

<p>In consequence of these doubts a committee was appointed by the British
Association consisting of Professor Maxwell, Professor Everitt, and
Dr. Schuster, and the report of this committee was presented to the
Association at their annual meeting in Glasgow in 1876. The report
consists mainly of an account of two experimental investigations
planned by Professor Maxwell and carried out in the Cavendish
Laboratory by Mr. Chrystal. To this report Mr. Chrystal added a brief
account of his experiments on the unilateral<span class="pagenum" id="Page_366">[Pg 366]</span> and bilateral deflection
of a galvanometer, affording a possible explanation of Dr. Schuster’s
result. The investigation proved that when a unit current passes
through a conductor of a square centimetre section, its resistance
does not differ from its value for indefinitely small currents by
0·000,000,001 per cent.</p>


<div class="sidenote">1873-9.</div>

<p>The scene of these congenial labours was surrounded with manifold
associations, which his love for Cambridge intensified. He had pleasant
intercourse with many persons there, and after a while resumed the
habit of occasional essay writing. Under the name of Erănus (or picnic)
a club of older men was formed, differing little apparently from the
“Apostles,” except in the greater seriousness of the discussions. Dr.
Lightfoot (now Bishop of Durham) and Professors Hort and Westcott
were members of this little circle of congenial spirits. Maxwell’s
contributions, containing his matured thoughts on various speculative
questions, will be found in <a href="#CHAPTER_XIII">Chapter XIII</a>. It may be remarked generally
that the most marked feature of his later life was an ever-increasing
soberness of spirit, and a deepening inward repose, which took nothing
from the brightness of his companionship, but rather kept fresh the
inexhaustible springs of cheerfulness and humorous mirth in him. The
beginnings of such “life in earnest” may be traced far back, but are
most obviously perceptible in his third year at Cambridge (1853),<a id="FNanchor_222" href="#Footnote_222" class="fnanchor">[222]</a>
in the summer<span class="pagenum" id="Page_367">[Pg 367]</span> of 1856, after his father’s death, and in the crisis of
his life at Aberdeen (1857-8).</p>

<p>This graver tone by no means checked the playful impulses that burst
forth from time to time in sparkling <i>jeux d'esprits</i>. It rather
fledged his arrows, while it loaded them, giving them a steadier
aim, so that his lightest effusions carried an unsuspected weight of
meaning. His wit was never more brilliant, more incisive, or (it may be
added) more perfectly good-humoured, than in the verses on Professor
Cayley’s portrait, and the “Notes of the President’s Address.” He found
time also to indulge his old taste for reading and writing in cypher,
and thus, on one occasion, considerably disconcerted a contributor to
the second column of the <i>Times</i>.</p>

<p>His outward appearance in these later years has been well described by
one who saw him first in 1866:—</p>

<p><span class="pagenum" id="Page_368">[Pg 368]</span></p><div class="blockquot">

<p>A man of middle height, with frame strongly knit, and a certain
spring and elasticity in his gait; dressed for comfortable ease
rather than elegance; a face expressive at once of sagacity and good
humour, but overlaid with a deep shade of thoughtfulness; features
boldly but pleasingly marked; eyes dark and glowing; hair and beard
perfectly black, and forming a strong contrast to the pallor of his
complexion.... He might have been taken, by a careless observer, for a
country gentleman, or rather, to be more accurate, for a north country
laird. A keener eye would have seen, however, that the man must be a
student of some sort, and one of more than ordinary intelligence.</p>

<p>In later years his hair had turned to iron gray, but until a few years
before his death he retained his elasticity of step.</p>

<p>The picture of Maxwell, as he appeared in 1866, became afterwards
perfectly familiar to residents in Cambridge. They will remember his
thoughtful face as he walked in the street, revolving some of the many
problems that engaged him, Toby lagging behind, till his master would
suddenly turn, as if starting from a reverie, and begin calling the dog.</p>
</div>

<p>The same authority continues—</p>

<div class="blockquot">

<p>... He had a strong sense of humour, and a keen relish for witty or
jocose repartee, but rarely betrayed enjoyment by outright laughter.
The outward sign and conspicuous manifestation of his enjoyment was
a peculiar twinkle and brightness of the eyes. There was, indeed,
nothing explosive in his mental composition, and as his mirth was never
boisterous, so neither was he fretful or irascible. Of a serenely
placid temper, genial and temperate in his enjoyments, and infinitely
patient when others would have been vexed or annoyed, he at all times
opposed a solid calm of nature to the vicissitudes of life.</p>

<p>In performing his private experiments at the laboratory, Maxwell was
very neat-handed and expeditious. When working thus, or when thinking
out a problem, he had a habit of whistling, not loudly, but in a
half-subdued manner, no<span class="pagenum" id="Page_369">[Pg 369]</span> particular tune discernible, but a sort of
running accompaniment to his inward thoughts.... He could carry the
full strength of his mental faculties rapidly from one subject to
another, and could pursue his studies under distractions which most
students would find intolerable, such as a loud conversation in the
room where he was at work. On these occasions he used, in a manner, to
take his dog into his confidence, and would say softly, “Tobi, Tobi,”
at intervals, and after thinking and working for a time, would at last
say (for example), “It must be so: Plato (<i>i.e.</i> Plateau), thou
reasonest well.” He would then join in the conversation.</p>

<p>... His acquaintance with the literature of his own country, and
especially with English poetry, was remarkable alike for its
extent, its exactness, and the wide range of his sympathies. His
critical taste, founded as it was on his native sagacity, and a keen
appreciation of literary beauty, was so true and discriminating that
his judgment was, in such matters, quite as valuable as on mathematical
writings. ... As he read with great rapidity, and had a retentive
memory, his mind was stored with many a choice fragment which had
caught his fancy. He was fond of reading aloud at home from his
favourite authors, particularly from Shakspeare, and of repeating such
passages as gave him the greatest pleasure.<a id="FNanchor_223" href="#Footnote_223" class="fnanchor">[223]</a></p>
</div>

<p>Maxwell wag rarely seen walking without a dog accompanying him, and,
when visiting the Laboratory for a short time, Toby or Coonie, or
both, would always attend him. Toby (II. or III.) came to Cambridge
with Professor Maxwell in 1871, and was thoroughly conversant with
the details of the Laboratory and some of<span class="pagenum" id="Page_370">[Pg 370]</span> its apparatus. He always
betrayed signs of uneasiness when he heard electric sparks, but when
summoned to his post he would sit down between his master’s feet and
allow the electrophorus to be excited upon his back, growling all the
time in a peculiar manner, as though to relieve his mind, but not
evidencing any signs of real discomfort. On one occasion Toby sat
quietly on an insulating support, and allowed himself to be rubbed
with a cat’s skin, when it was found that the dog became positively
electrified, contrary to the general belief that a cat’s skin is
positive to everything; whereupon Professor Maxwell remarked that “a
live dog is better than a dead lion.” It remains for a future physicist
to determine the electric relations of a live cat and dog.</p>

<p>One great charm of Maxwell’s society was his readiness to converse on
almost any topic with those whom he was accustomed to meet, although he
always showed a certain degree of shyness when introduced to strangers.
He would never tire of talking with boyish glee about the d——l on
two sticks and similar topics, and no one ever conversed with him for
five minutes without having some perfectly new ideas set before him;
sometimes so startling as to utterly confound the listener, but always
such as to well repay a thoughtful examination. Men have often asked,
after listening to a conversation on some scientific question, whether
Maxwell were in earnest or joking.<a id="FNanchor_224" href="#Footnote_224" class="fnanchor">[224]</a> The charm of his conversation
rendered it<span class="pagenum" id="Page_371">[Pg 371]</span> very difficult to carry on any independent work when
he was present, but his suggestions for future work far more than
compensated for the time thus spent.</p>

<p>On one occasion, after removing a large amount of calcareous deposit
which had accumulated in a curiously oolitic form in a boiler, Maxwell
sent it to the Professor of Geology with a request that he would
identify the formation. This he did at once, vindicating his science
from the aspersion which his brother professor would playfully have
cast on it.</p>

<p>Maxwell still found occasional recreation in riding at Cambridge as
well as more frequently at Glenlair, where he resided as much as
he could consistently with his professional duties.<a id="FNanchor_225" href="#Footnote_225" class="fnanchor">[225]</a> He always
arranged to leave Cambridge at the end of the Easter term in time to
officiate at the midsummer communion in the kirk at Parton, where he
was an elder. His liberality in his own neighbourhood was very great.
Besides the endowment of the church, and building of the manse at
Corsock, he had planned a large contribution to the cause of primary
education. When the School Board was instituted in the district,
Maxwell was very anxious to keep up the school established in the
reign of George III. at Merkland, in the immediate neighbourhood of
the village of Kirkpatrick-Durham, in addition to the Board school at
Corsock, five miles away. When this offer was refused, he set apart
a site and had plans made for a school to be<span class="pagenum" id="Page_372">[Pg 372]</span> erected and supported
at his own expense upon his estate, but failing health prevented the
accomplishment of his purpose.</p>

<p>The last few years of Maxwell’s life were saddened by the serious and
protracted illness of Mrs. Maxwell. Notwithstanding the inexhaustible
freshness of his spirit, his work could not but be somewhat modified by
a cause so grave. He was an excellent sick-nurse, and we have already
seen how he attended upon Pomeroy when attacked with fever in college,
how he devoted himself to his father during his illness, and how he
cared for his brother-in-law when in London. On one occasion during
Mrs. Maxwell’s illness he did not sleep in a bed for three weeks, but
conducted his lectures and other work at the Laboratory as usual. While
attending on his wife he would continue working at his manuscripts,
or would arrange a series of experiments to be carried out by one
of the workers at the Cavendish Laboratory; but the time which he
could personally devote to his own experiments was very limited. The
same cause prevented his attendance at meetings in London and at the
British Association, for which, however, he retained his affection.
His wonderful devotion to his wife, and the almost mystical manner in
which he regarded the marriage tie, are sufficiently apparent from his
letters.</p>

<p>The meeting of the British Association, held at Belfast in 1874 when
Professor Tyndall was President, was the last which Maxwell attended.
Before Section A he read a note “On the Application of Kirchhoff’s
Rules for Electric Circuits to the Solution of<span class="pagenum" id="Page_373">[Pg 373]</span> a Geometrical Problem;”
but his attendance at this meeting will be remembered chiefly on
account of his paraphrase of the President’s address, which was
published in <i>Blackwood’s Magazine</i>, and, together with the late
Mr. Shilleto’s Greek translation of it, will be found reprinted in Part
III. His verses on the Red Lions, a social club consisting of members
of the Association, were also written at this meeting.</p>

<p>In university politics Maxwell was regarded as a Conservative, and, as
such, in November 1876, he was elected a member of the Council of the
Senate of the University. His views respecting various questions of
university reform are sufficiently indicated by his letters, especially
those addressed to Mr. Monro (see p. 269). He was also a member of the
Mathematical Studies and Examinations Syndicate, which was appointed on
17th May 1877, and which sat every week during term for a whole year
for the purpose of reorganising the Mathematical Tripos.</p>

<p>In 1873 and 1874 Professor Maxwell was one of the examiners for the
Natural Sciences Tripos, and in 1873 he was the first “Additional
Examiner” in the Mathematical Tripos under the new regulations which
then came into force. This was the fifth time that he had examined in
the Mathematical Tripos in the course of seven years. He was president
of the Cambridge Philosophical Society during the session 1876-7.<a id="FNanchor_226" href="#Footnote_226" class="fnanchor">[226]</a></p>

<p><span class="pagenum" id="Page_374">[Pg 374]</span></p>

<p>Besides many contributions to Nature and other similar publications
during his residence in Cambridge, Maxwell wrote several articles for
the Ninth Edition of the <i>Encyclopœdia Britannica</i>. The last
scientific paper he ever wrote was the very brief article on Harmonic
Analysis, the proof of which was sent for correction when its author
was too weak to read it.</p>

<p>Although the publication of the <i>Treatise on Heat</i> and of the
<i>Electricity and Magnetism</i> falls within this period, they were
mainly written during the time of his retirement at Glenlair. The
“small book on a great subject,” entitled <i>Matter and Motion</i>, was
merely the concise expression of his most habitual thoughts. But his
chief literary work during the last seven years of his life was the
editing of the <i>Electrical Researches of the Hon. Henry Cavendish,
F.R.S</i>.</p>

<p>Henry Cavendish was son of Lord Charles Cavendish<span class="pagenum" id="Page_375">[Pg 375]</span> and great uncle to
the present Duke of Devonshire. He published only two papers relating
to electricity—“An Attempt to Explain some of the Phenomena of
Electricity by means of an Elastic Fluid” (<i>Phil. Trans.</i> 1771)
and “An Account of some Attempts to Imitate the Effects of the Torpedo
by Electricity” (<i>Phil. Trans.</i> 1776). He had prepared, however,
some twenty packets of manuscript on Mathematical and Experimental
Electricity. These, after his death, were placed by the then Earl
of Burlington, now Duke of Devonshire, in the hands of the late Sir
William Snow Harris, who appears to have made an abstract of them,
with a commentary of great value on their contents. Of this abstract
and commentary Professor Maxwell was unable to gain possession,
but the Cavendish Manuscripts were placed in his hands by the Duke
of Devonshire in 1874. The manner in which the contents of these
manuscripts were investigated by Professor Maxwell, and the series of
experiments he conducted in order to test Cavendish’s results, will be
referred to in Part II. The final proof-sheets were returned to press
during the summer of 1879, and the book was published in October of
the same year. The letters on this subject, which will be found below,
are types of very many that were written by Maxwell respecting the
Cavendish papers.</p>

<p>The title of the book as published in October 1879 (one thick volume,
8vo) is <i>An Account of the Electrical Researches of the Honourable
Henry Cavendish</i>, F.R.S., <i>between</i> 1771 <i>and</i> 1781. Few
or none could have performed that task as he has performed it.<span class="pagenum" id="Page_376">[Pg 376]</span> And yet
some may wish that these precious years had been given rather to the
unimpeded prosecution of his own original researches.<a id="FNanchor_227" href="#Footnote_227" class="fnanchor">[227]</a></p>

<p>At my last meeting with him,—it was in his house at Cambridge, in the
year 1877,—in the midst of some discursive talk, he took the MS. of
this book out of a cabinet, and began showing it to me and discoursing
about it in the old eager, playful, affectionate way, just as with the
magic discs in boyhood, or the register of the colour-box observations
at a later time, in the little study at Glenlair. “And what,” I said,
“of your own investigations in various ways?” “I have to give up so
many things,” he answered, with a sad look, which till then I had never
seen in his eyes. Even before this, as it now appears, he had felt the
first symptoms of the inexorable malady, which in the spring of 1879
assumed a dangerous aspect, and killed him in the autumn of that year.</p>


<p class="nindc space-above2">
<span class="allsmcap">Letters, 1871 to 1879—<i>ÆT.</i>. 39-48.</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From C. J. Monro, Esq.</span></p>

<p class="right"><i>Hadley, Barnet, 3d March 1871.</i></p>

<p>The Hon. J. W. Strutt, son of Lord Rayleigh, and senior wrangler in
1865, has been meddling with your colours, and has given occasion also
to me to do so again. I send a selection of <i>Natures</i> containing
him and me, and my old contributions of last year, which, or one of
which, you say met Mr. Benson’s approval. Strutt’s last letter ends
with a sentence which obliged me to write to him<span class="pagenum" id="Page_377">[Pg 377]</span> personally; and I
could not help saying, with regard to the sentence which begins it,
p. 264, that I thought you would object to inferences founded on
comparison by contrast, and that the proper way was to compare by
matching recognised browns with a compound.</p>

<p>Listing’s paper, mentioned in p. 102, was to me rather a paradox,—I
had got to regard the subdivisions of the colour-scale which are
assumed in language, as something so arbitrary. If you cared to see
it, I have that number of Poggendorff; I think he would hardly agree
with your J. J. Müller. I wish you or Benson could eradicate the
insane trick of reasoning about colours <i>as identified by their
names</i>. People seem to think that blue is blue, and one blue as
good as another. Benson’s book I have seen (since I heard of it from
you), but not read. His way of mixing by means of a prism is very
happy.... I wish, with your new set up box, you would just put the
prism observations into relation with the disk ones. It would be very
easy. White we have got; and it would only be <i>strictly</i> necessary
to determine two other standard colours, such as vermilion or emerald,
by reference to the spectrum primaries. You don’t say whether your
dwellers in Mesopotamia and elsewhere agree on the whole better or
worse than “J” and “K,” who, I suppose, agree for better and for worse.
To judge by their case, the discrepancy would be a little diminished
by taking as units of colour co-ordinates for any given pair of eyes,
not the intensities of the primaries as they appear in the spectrum,
but their intensities as they appear in the combination which to that
pair of eyes makes (say) white. This amounts to transforming from
trilinear to Hamilton’s anharmonic co-ordinates with white for the
fourth point,— in the language of “scientific metaphor.” On the other
hand, ought not all your co-ordinates to be cooked by multiplying by
\(\dfrac{d.\, \text {scale, page}\, 68}{d.\, \text {wave-length}}\)?</p>

<p>You know where I learnt <i>scientific metaphor</i>. I have read
the address in Section A more than once with much pleasure, and, I
hope, profit in proportion. The pleasure, I<span class="pagenum" id="Page_378">[Pg 378]</span> confess, was with me,
as I found it was with Litchfield, partly that of recognising an old
well-remembered style, and reflecting that here at least was something
which might be “thought to be beyond the reach of change.”... By the
way, Boole is “one of the profoundest mathematicians of our time;” but
how about “thinkers”? Certainly his expositions of the principle of a
piece of mathematics are beautiful up to and, I don’t doubt, beyond
my appreciating. But that last chapter of the <i>Laws</i>, etc., from
which you quote, with Empedocles and Pseudo-Origen and the rest of
them, always seems to me to render a sound as of a largish internal
cavity; and the whole book, taken together with his B.S.E. paper on
testimony and least squares, presents, I think, too many instances
of a particular class of fallacy—I know I am speaking blasphemies,
but there would be a strike among the postmen if I put in all the
necessary qualifications—too many instances to be got over, not in
absolute number if they were of different kinds, for anybody may
make mistakes, but too many of one kind. The kind is <i>insufficient
interpretation</i>, <i>i.e.</i> letting your equations lead you by the
nose. The most serious example,—I maintain it is an example,—is his
insisting that his theory of logic is not founded on quantity, so that
it furnishes (he holds) an independent foundation for probabilities,
independent of the usual quantitative foundation. That this is a
fallacy, and that in particular it is an example of the fallacy of
insufficient interpretation, is evident surely when you find that, even
in the higher case of “secondary” propositions, the elective symbols
represent in his own opinion <i>quantities</i> of “time” after all.
With regard to the sentence you quote, I am always suspicious of any
inclination I may feel to find a question too easy; and, independently
of that, your quoting it is itself a staggerer. But the difficulty I
confess does strike me as a rather artificial one. There is nothing,
scarcely, in which I think Mill is so right and the Hamiltonians so
wrong as that question about logic being the laws of thought. Hamilton
says <i>as thought</i>, Mill says <i>as valid</i>, and so does Boole
and so do you; but if Mill is right, where is<span class="pagenum" id="Page_379">[Pg 379]</span> the difficulty? Why
<i>should</i> the conditions of thinking correctly he inviolable in the
sense of not preventing you from thinking incorrectly, provided they
are inviolable in the sense of ensuring that you take the consequences
if you do? The laws of projection in geometry are inviolable, but
nobody ever thought it a paradox that it is possible for a picture to
be <i>out of drawing</i> in spite of them, nor is it a paradox that in
unfamiliar classes of cases a rigorously accurate piece of perspective
<i>looks</i> out of drawing. Perhaps you meant, for I suppose the
report in <i>Nature</i> is incomplete, that it was a difficulty to
say in what sense mathematical propositions could be said to be
<i>certain</i>, considering that one may make mistakes about them.
Perhaps something else, which for the above reason or others, is hidden
from me.</p>

<p>... By the way, I hope it is true that you are to profess experimental
physics at Cambridge, or what I hope comes to the same thing, that you
are a candidate.</p>


<p class="nindc"><span class="allsmcap">To C. J. Monro, Esq.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 15th March 1871.</i></p>

<p>I have been so busy writing a sermon on Colour, and Tyndalising my
imagination up to the lecture point, that along with other business I
have had no leisure to write to any one.</p>

<p>I think a good deal may be learned from the names of colours, not about
colours, of course, but about names; and I think it is remarkable that
the rhematic instinct has been so much more active, at least in modern
times, on the less refrangible side of primary green (\(\lambda=510
\times 10^{-9} \text{inches})\).</p>

<p>I am not up in ancient colours, but my recollection of the
interpretations of the lexicographers is of considerable confusion
of hues between red and yellow, and rather more discrimination on
the blue side. Qu. If this is true, has the red sensation become
better developed since those days? Benson has a new book, Chapman &amp;
Hall, 1871, called <i>Manual of Colour</i>.<span class="pagenum" id="Page_380">[Pg 380]</span> I think it is a great
improvement on the Quarto, both in size and quality. It is the size of
this paper I write on.</p>

<p>I have not asked you if you wish to go to sermon on Colour, for I do
not think the P. I.<a id="FNanchor_228" href="#Footnote_228" class="fnanchor">[228]</a> a good place to go to of nights, even for
strong men. I have, however, some tickets to spare.</p>

<p>The peculiarity of our space is that of its three dimensions none is
before or after another. As is \(x\), so is \(y\) and so is \(z\).</p>

<p>If you have 4 dimensions this becomes a puzzle, for—first, if three of
them are in our space, then which three? Also, if we lived in space of
\(m\) dimensions, but were only capable of thinking \(n\) of them, then
1st, Which \(n\)? 2d, If so, things would happen requiring the rest to
explain them, and so we should either be stultified or made wiser.</p>

<p>I am quite sure that the kind of continuity which has four dimensions
all co-equal is not to be discovered by merely generalising Cartesian
space equations. (I don’t mean by Cartesian space that which Spinoza
worked from Extension the one essential property of matter, and Quiet
the best glue to stick bodies together). I think it was Jacob Steiner
who considered the final cause of space to be the suggestion of new
forms of continuity.</p>

<p>I hope you will continue to trail clouds of glory after you, and
tropical air, and be as it were a climate to yourself. I am glad to see
you occasionally in <i>Nature</i>. I shall be in London for a few days
next week,—address Athenæum Club.</p>

<p>I think Strutt on sky-blue is very good. It settles Clausius’s
vesicular theory,</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“for, putting all his words together.</div>
    <div class="verse indent0">’tis 3 blue beans in 1 blue bladder.”—<i>Mat. Prior.</i></div>
  </div>
</div>
</div>

<p>The Exp. Phys. at Cambridge is not built yet, but we are going to try.</p>
</div>

<p><span class="pagenum" id="Page_381">[Pg 381]</span></p>

<div class="blockquot">

<p>The desideratum is to set a Don and a Freshman to observe and register
(say) the vibrations of a magnet together, or the Don to turn a winch,
and the Freshman to observe and govern him.</p>


<p class="nindc"><span class="allsmcap">From Professor Tyndall.</span></p>

<p class="right"><i>Monday.</i></p>

<p><span class="allsmcap">My dear Maxwell</span>—Why ... did you run away so rapidly. I wished
to shake your hand before parting.—Yours ever,</p>

<p class="right"><span class="allsmcap">John Tyndall.</span></p>


<p class="nindc"><span class="allsmcap">To Mrs. Maxwell.</span></p>

<p class="right"><i>20th March 1871.</i></p>

<p>There are two parties about the professorship. One wants popular
lectures, and the other cares more for experimental work. I think there
should be a gradation—popular lectures and rough experiments for the
masses; real experiments for real students; and laborious experiments
for first-rate men like Trotter and Stuart and Strutt.</p>


<p class="nindc"><span class="allsmcap">From C. J. Monro, Esq.</span></p>

<p class="right"><i>Hadley, 21st March 1871.</i></p>

<p>... I never observed before that ancient colour-nomenclature was more
discriminate than ours for the more “violently” refracted tints as
compared with the less; but I think there must be something in it.
But I have always suspected that they referred colour to a positively
distinct set of co-ordinates from ours. Gladstone says something of
this sort in <i>Homer</i>; who put it into his head I can’t think;
if he made it out for himself I should be very sorry to agree with
a man who does not believe in spectrum analysis, and does believe
that Leto is the Virgin Mary. Such queer applications of words of
colour one does find. You know the “pale” horse of the Apocalypse
(vi. 8); well, that is \(\chi \lambda \omega \rho o ́ s\) which
is usually “green,” you know. General Daumas says the Arabs call
“vert” what the French call “louvet” in horses; and <i>louvet</i>,
in Littré, “Se dit, chez le cheval, d’une robe caractérisé par la
présence de<span class="pagenum" id="Page_382">[Pg 382]</span> la nuance jaune et du noir, qui lui donne une certaine
ressemblance avec le poil du loup.... Substantivement,” he continues,
“Le louvet n’est, à proprement parler, qu’un isabelle charbonné.” The
Arabic for green, and (I have no doubt) the word Daumas speaks of,
is akhdár, kh as ch in Scotch, and the dot marking a modification
which, it happens, is imitated by interpolating an L in Spanish
and Portuguese; so \(\chi\lambda\omega\rho\mathrm{o}'\varsigma\)
may have been supposed to have something to do with the Semitic
word. However, according to dictionaries, “the three greens” in
Arabic are “gold, wine, and meat,” which beats the green horse.
I suppose the Revisionists will leave “pale,” and certainly
\(\chi\lambda\omega\rho\mathrm{ò}\nu\) δέος? is the Homeric for a blue
funk. But \(\chi\lambda\omega\rho\mathrm{o}'\varsigma\), and akhdár,
too, are certainly the colour of chlorophyll, and Daumas’s remark is a
note on a line in a translation from a poet, which runs “Ces chevaux
verts comme le roseau qui croit au bord des fleuves.”</p>

<p>I am glad you are going to preach, and I should like to sit under you,
but as you assume, it would not do. Thanks all the same.</p>


<p class="nindc"><span class="allsmcap">To Mrs. Maxwell.</span></p>

<p class="right"><i>Athenæum, 22d March 1871.</i></p>

<p>I also got a first-rate letter from Monro about colour, and the Arab
words for it (I suppose he studied them in Algeria). They call horses
of a smutty yellow colour “green.” The “pale” horse in Revelation is
generally transcribed green elsewhere, the word being applied to grass,
etc. But the three green things in the Arabic dictionary are “gold,
wine, and meat,” which is a very hard saying.</p>


<p class="nindc"><span class="allsmcap">From C. J. Monro, Esq.</span></p>

<p class="right"><i>Hadley, Barnet, 10th September 1871.</i></p>

<p>... Of your own things, the <i>Classification of Quantities</i> and
the <i>Hills and Dales</i>, are all I have read to much purpose. Nor
them either, you may say, if I go on to ask why you say that “in the
pure theory of surfaces there is no method of determining a line of
water-shed or water-course, except<span class="pagenum" id="Page_383">[Pg 383]</span> as therein is excepted, that is in
page 6? Why does not this determine them? to wit—
\[
\left(\frac{d z}{d x}\right)^{2}+\left(\frac{d z}{d y}\right)^{2} \text {maximum,}\, \&\left\{\begin{array}{l}
z \max \text {for a shed.} \\
z \operatorname{min.} \text {for a course.}
\end{array}\right.
\]
Or if this does determine them, how does it resolve itself into “first
finding,” etc.?</p>

<p>I am glad you like Strutt on sky-blue. You see he sees his way now to
a new theory of double refraction. Looking at your old letter again,
I don’t quite see the force of either of your objections to space of
more than three dimensions. First, you ask if we can think some of the
dimensions and not others, then which? Surely one might answer, that
depends—depends namely on your circumstances—on circumstances which
in your circumstances you cannot expect to judge of.</p>

<p>“I can easily believe,” as Darwin would say, that before we were tidal
ascidians we were a slimy sheet of cells floating on the surface of
the sea. Well, in those days, the missing dimension, and the two
forthcoming ones respectively, kept changing with the rotation of the
earth,—we now know how, but could not guess then. So, now, the missing
dimension or dimensions, if any, might be determined by circumstances
which we could not tell unless we knew all about the said dimension or
dimensions.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 19th October 1872.</i></p>

<p>... Lectures begin 24th. Laboratory rising, I hear, but I have no
place to erect my chair, but move about like the cuckoo, depositing
my notions in the chemical lecture-room 1st term; in the Botanical in
Lent, and in Comparative Anatomy in Easter.</p>

<p>I am continually engaged in stirring up the Clarendon Press, but they
have been tolerably regular for two months. I find nine sheets in
thirteen weeks is their average. Tait gives me great help in detecting
absurdities. I am getting converted to Quaternions, and have put some
in my book, in<span class="pagenum" id="Page_384">[Pg 384]</span> a heretical form, however, for as the Greek alphabet
was used up, I have used German capitals from \(\mathfrak{A}\) to
\(\mathfrak{J}\) to stand for Vectors, and, of course, \(\nabla\)
occurs continually. This letter is called “Nabla,”<a id="FNanchor_229" href="#Footnote_229" class="fnanchor">[229]</a> and the
investigation a Nablody. You will be glad to hear that the theory
of gases is being experimented on by Profs. Loschmidt and Stefan of
Vienna, and that the conductivity of air and hydrogen are within 2 per
cent of the value calculated from my experiments on friction of gases,
though the diffusion of one gas into another is “<i>in erglanzender
ubereinstimmung mit</i> \(\dfrac{d p}{d t}\) <i>schen Theorie</i>.”</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Professor W. G. Adams.</span></p>

<p class="right"><i>Natural Science Tripos,<br>
3d December 1873.</i></p>

<p>I got Professor Guthrie’s circular some time ago. I do not approve
of the plan of a physical society considered as an instrument for
the improvement of natural knowledge. If it is to publish papers on
physical subjects which would not find their place in the transactions
of existing societies, or in scientific journals, I think the progress
towards dissolution will be very rapid. But if there is sufficient
liveliness and leisure among persons interested in experiments to
maintain a series of stated meetings to show experiments, and talk
about them as some of the Ray Club do here, then I wish them all joy;
only the manners and customs of London, and the distances at which
people live from any convenient centre, are very much against the
vitality of such sociability.</p>

<p>To make the meeting a dinner supplies that solid ground to which the
formers of societies must trust if they would build for aye. A dinner
has the advantage over mere scientific communications, that it can
always be had when certain conditions are satisfied, and that no one
can doubt its existence. On the other hand, it completely excludes any
scientific matter which cannot be expressed in the form of conversation
with your two chance neighbours, or else by<span class="pagenum" id="Page_385">[Pg 385]</span> a formal speech on your
legs; and during its whole continuance it reduces the Society to the
form of a closed curve, the elements of which are incapable of changing
their relative position.</p>

<p>For the evolution of science by societies the main requisite is the
perfect freedom of communication between each member and any one of the
others who may act as a reagent.</p>

<p>The gaseous condition is exemplified in the soiree, where the members
rush about confusedly, and the only communication is during a
collision, which in some instances may be prolonged by button-holing.</p>

<p>The opposite condition, the crystalline, is shown in the lecture, where
the members sit in rows, while science flows in an uninterrupted stream
from a source which we take as the origin. This is radiation of science.</p>

<p>Conduction takes place along the series of members seated round a
dinner table, and fixed there for several hours, with flowers in the
middle to prevent any cross currents.</p>

<p>The condition most favourable to life is an intermediate plastic or
colloidal condition, where the order of business is (1) Greetings and
confused talk; (2) A short communication from one who has something
to say and to show; (3) Remarks on the communication addressed to
the Chair, introducing matters irrelevant to the communication but
interesting to the members; (4) This lets each member see who is
interested in his special hobby, and who is likely to help him; and’
leads to (5) Confused conversation and examination of objects on the
table.</p>

<p>I have not indicated how this programme is to be combined with eating.
It is more easily carried out in a small town than in London, and more
easily in Faraday’s young days (see his life by B. Jones) than now. It
might answer in some London district where there happen to be several
clubbable senior men who could attract the juniors from a distance.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 3d April 1873.</i></p>

<p>The roof of the Devonshire Laboratory is being put on,<span class="pagenum" id="Page_386">[Pg 386]</span> and we hope to
have some floors in by May, and the contractors cleared out by October.
We are busy electing School Boards here. The religious difficulty is
unknown here. The chief party is that which insists on keeping down
the rates; no other platform will do. All candidates must show the
retrenchment ticket.</p>

<p>The Cambridge Philosophical Society have been entertained by Mr. Paley
on Solar Myths, Odusseus as the Setting Sun, etc. Your Trachiniæ is
rather in that style, but I think Middlemarch is not a mere unconscious
myth, as the Odyssey was to its author, but an elaborately conscious
one, in which all the characters are intended to be astronomical or
meteorological.</p>

<p>Rosamond is evidently the Dawn. By her fascinations she draws up into
her embrace the rising sun, represented as the Healer from one point
of view, and the Opener of Mysteries from another; his name, Lyd Gate,
being compounded of two nouns, both of which signify something which
opens, as the eye-lids of the morn, and the gates of day. But as the
sun-god ascends, the same clouds which emblazoned his rising, absorb
all his beams, and put a stop to the early promise of enlightenment,
so that he, the ascending sun, disappears from the heavens. But the
Rosa Munda of the dawn (see Vision of Sin) reappears as the Rosa Mundi
in the evening, along with her daughters \(\unicode{x2640}\) and
\(\unicode{x263f}\), in the chariot of the setting sun, who is also a
healer, but not an enlightener.</p>

<p>Dorothea, on the other hand, the goddess of gifts, represents the other
half of the revolution. She is at first attracted by and united to the
fading glories of the days that are no more, but after passing, as the
title of the last book expressly tells us, “from sunset to sunrise,” we
find her in union with the pioneer of the coming age, the editor.</p>

<p>Her sister Celia, the Hollow One, represents the vault of the midnight
sky, and the nothingness of things.</p>

<p>There is no need to refer to Nicolas Bulstrode, who evidently
represents the Mithraic mystery, or to the kindly family of Garth,
representing the work of nature under the<span class="pagenum" id="Page_387">[Pg 387]</span> rays of the sun, or to the
various clergymen and doctors, who are all planets. The whole thing is,
and is intended to be, a solar myth from beginning to end.</p>


<p class="nindc"><span class="allsmcap">To Mrs. Maxwell.</span></p>

<p class="right"><i>December 1873.</i></p>

<p>I am always with you in spirit, but there is One who is nearer to you
and to me than we ever can be to each other, and it is only through
Him and in Him that we can ever really get to know each other. Let us
try to realise the great mystery in Ephesians <span class="allsmcap">V.</span>, and then we
shall be in our right position with respect to the world outside, the
men and women whom Christ came to save from their sins.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>11 Scroope Terrace,<br>
Cambridge, 26th February 1874.</i></p>

<p>Jackson has sent me a MS. of yours about the mechanism of the
heavens.<a id="FNanchor_230" href="#Footnote_230" class="fnanchor">[230]</a> After the interpretation of είλλομένην, about which
Greek appears to meet Greek as to whether it expresses motion or only
configuration, the main point seems to be, What is the motion and
function of τὸν διὰ παντὸς πόλον?</p>

<p>(\(\alpha\)) Is it in one piece with the sphere of the stars? or
(\(\beta\)) with that of the sun or (\(\gamma\)) is it fixed in the
earth?</p>

<p>It is evidently a good stout axle, not a mere geometrical line, and it
has some stiff work to do.</p>

<p>What is this work?</p>

<p>If the earth is fixed, and the great shafts has its bearings in a hole
in the earth, then she (the earth) may, in virtue of her dignity and
office, cause the axle to revolve, carrying with it the stars according
to \(\alpha\), or the sun according to \(\beta\). Thus the earth may
be the cause of the motion of the Same without moving herself, as a
spinster is the cause of the whirling of the spindle, though she does
not herself pirouette.</p>
</div>

<p><span class="pagenum" id="Page_388">[Pg 388]</span></p><div class="blockquot">

<p>Or we may suppose the earth to act as one who twirls an expanded
umbrella over his head about its stick as an axis, the holes in the
same representing the stars. The objection to this view (which seems to
me to be Jowett’s) is that in stating the relation between the earth
and the axis, the earth is said to be related to the axis (packed or
whirling as the case may be), and not the axis to the earth. Now, I
suppose that without all contradiction the less is related to the
better. Here the earth is like a ball of clay packed round a graft on
the branch of a tree, rather than like a field in which, by means of a
rotatory boring tool, men bore for water.</p>

<p>But the business of the earth is not so much to keep the stars in
motion as to effect the changes of night and day. This she may do
either by rotating herself from W. to E., or by controlling the motion
of the sun, by the help of the great shaft.</p>

<p>Now, if you always observe at the same time of night (a common
practice), you find the eastern stars higher every day, and the western
lower. All have the <i>same</i> motion, which carries them round from
E. to W. in a <i>year</i>.</p>

<p>Mars, Jupiter, and Saturn, in spite of their wanderings go on the whole
in the same direction, but slower. Venus and Mercury oscillate about
the sun, and the moon goes the opposite way—from W. to E.</p>

<p>That this way of viewing the matter was really prevalent at one time
is plain, from the expression the rising of such a star to denote not
a time of night but a time of year. It means either (1) the day when
the star rises, just before it is lost in the brightness of the sun
who follows it, or (2) the day when the star is rising, when it just
becomes visible after sunset.</p>

<p>Virgil, who speaks of stars rising, evidently had no practical
knowledge of what he meant. Plato, if he sometimes gets hazy, is far
clearer than Virgil. Grote would place him far below Mr. Jellinger
Symons, who denied the rotation of the moon, because Grote makes
Plato say that both the heavens and the earth rotate both in the same
direction, and with the same angular velocity.</p>
</div>

<p><span class="pagenum" id="Page_389">[Pg 389]</span></p>

<div class="blockquot">

<p>I think I understand you to make Plato make the earth sit still and
preside over the heavenly motions, and so become the artificer of day
and night, like a policeman who swings his bull’s-eye round to his
back. But his words are capable of being used by the movers of the
earth, as Milton says,</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">If earth, <i>industrious of herself, fetch day</i></div>
    <div class="verse indent0">Travelling east.</div>
  </div>
</div>
</div>

<p>I hope you will let me know whether I have not misunderstood both you,
Plato, and the Truth. I have never thanked you for your Œdipus, etc.,
which I have enjoyed. But at present I am all day at the Laboratory,
which is emerging from chaos, but is not yet cleared of gas-men, who
are the laziest and most permanent of all the gods who have been
hatched under heaven.<a id="FNanchor_231" href="#Footnote_231" class="fnanchor">[231]</a></p>

<p>Mrs. Maxwell joins me in kind regards to Mrs. Campbell and
yourself.—Your afft. friend.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To W. Garnett, Esq.</span></p>

<p class="right"><i>Glenlair, 8th July 1874.</i></p>

<p>... In the MS. he [Cavendish] appears to be familiar with the theory of
divided currents, and also of conductors in series, but some reference
to his printed paper [on the Torpedo] is required to throw light on
what he says. He made a most extensive series of experiments on the
conductivity of saline solutions in tubes compared with wires of
different metals, and it seems as if more marks were wanted for him if
he cut out G. S. Ohm long before constant currents were invented. His
measurements of capacity will give us some work at the Cavendish Lab.,
before we work up to the point where he left it. His only defect is
not having Thomson’s electrometer. He found out inductive capacity of
glass, resin, wax, etc.</p>
</div>

<p><span class="pagenum" id="Page_390">[Pg 390]</span></p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 26th September 1874.</i></p>

<div class="sidenote"><i>Æt.</i> 43.</div>

<p>Yours of the 29th instant is to hand. Whether your devotion to Michael
Angelo has urged you to anticipate his day, or whether Time gallops
with those who sit to view Necessity, with her weary pund o’ tow massed
round her rock, being all the remains of the stane o’ lint with which
she was originally endowed, those who may be set to construe this
sentence will be apt to lose much time.</p>

<p>With regard to atoms, I am preparing a hash of them for Baynes of the
<i>Britannica</i>. The easiest way of showing what atoms can’t do is
to get some sort of notion of what they can do. If atoms are finite
in number, each of them being of a certain weight, then it becomes
impossible that the germ from which a man is developed should contain
(actually, of course, not potentially, for potentiality is nonsense
in materialism unless it is expressed as configuration and motion)
gemmules of everything which the man is to inherit, and by which he
is differentiated from other animals and men,—his father’s temper,
his mother’s memory, his grand-father’s way of blowing his nose, his
arboreal ancestor’s arrangement of hair on his arms, and his more
remote littoral ancestor’s devotion to the tide-swaying moon. Francis
Galton, whose mission it seems to be to ride other men’s hobbies to
death, has invented the felicitous expression “structureless germs.”
Now, if a germ, or anything else, contains in itself a power of
development into some distinct thing, and if this power is purely
physical, arising from the configuration and motion of parts of the
germ, it is nonsense to call it structureless because the microscope
does not show the structure; the germ of a rat <i>must</i> contain
more separable parts and organs than there are drops in the sea. But
if we are sure that there are not more than a few million molecules
in it, each molecule being composed of component molecules, identical
with those of carbon, oxygen, nitrogen, hydrogen, etc., there is no
room left for the sort of structure which is required for pangenesis
on purely physical principles. Again, suppose that a great many
individual atoms take part in a disturbance<span class="pagenum" id="Page_391">[Pg 391]</span> in my brain, to whom does
this signify anything? As for the atoms, they have been in far worse
rows before they became naturalised in my brain, but they forget the
days before, etc.<a id="FNanchor_232" href="#Footnote_232" class="fnanchor">[232]</a> At any rate the atoms are a very tough lot, and
can stand a great deal of knocking about, and it is strange to find a
number of them combining to form a man of feeling.</p>

<p>In your letter you apply the word imponderable to a molecule. Don’t
do that again. It may also be worth knowing that the æther cannot be
molecular. If it were, it would be a gas, and a pint of it would have
the same properties as regards heat, etc., as a pint of air, except
that it would not be so heavy.</p>

<p>Under what form (right or light) can an atom be imagined? Bezonian!
speak or die! Now I must go to post with two dogs in the rain.—Your
afft. friend.</p>
</div>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>11 Scroope Terrace,<br>
Cambridge, 4th March 1876.</i></p>

<div class="sidenote2"><i>Æt.</i> 44.</div>

<p>Aias arrived here about a week ago. I read him with pleasure. He
recalled the year 1851, when I got him up. The outline of the play
seems very bare and unpromising compared with some others, but this
is relieved by other features which are not in the “argument,” as
<i>e.g.</i> the loyalty of the chorus and of Tecmessa to Aias under
all circumstances (for the chorus in general veers about, and backs
occasionally, according as the wind blows or the cat jumps).</p>

<p>This contrasts favourably with the character of Athena, who is but so,
only not so comic as the Atreidæ.</p>

<p>But why do Ulysses and Aias not name each other in the same language? I
suppose the last syllable of Odysseus, pronounced Anglicé, is somewhat
unpleasant in verse, and Ajax, though familiarised by Pope, has lost
the interjectional sound of your hero’s name.</p>
</div>

<p><span class="pagenum" id="Page_392">[Pg 392]</span></p>

<div class="blockquot">

<p>Two Aberdonians, Chrystal and Mollison, are working at the Cavendish
Laboratory. I think Chrystal’s work is of a kind not comparable
with that done in “a third-class German university,” which was the
charitable hope of <i>Nature</i> as to what we might aspire to in ten
years' time. He has worked steadily at the testing of Ohm's Law since
October, and Ohm has come out triumphant, though in some experiments
the wire was kept bright red-hot by the current.—Your afft. friend.</p>


<p class="nindc"><span class="allsmcap">From the Right Rev. C. J. Ellicott, D.D., Lord Bishop of Gloucester
and Bristol.</span></p>

<p class="right"><i>Palace, Gloucester, 21st Nov. 1876.</i></p>

<p><span class="allsmcap">My dear Sir</span>—Will you kindly pardon a great liberty? I have
quoted in a forthcoming charge a remarkable expression of yours that
atoms are “manufactured articles.” Could you in your kindness give me
the proper title and reference to the paper and the page? I am now,
alas, far from libraries, and have, in matters scientific especially,
to ask the aid of others. Will you excuse me asking this further
question?</p>

<p>Are you, as a scientific man, able to accept the statement that is
often made on the theological side, viz. that the creation of the sun
posterior to fight involves no serious difficulty,—the creation of
light being the establishment of the primal vibrations, generally;
the creation of the sun, the primal formation of an origin, whence
vibrations would be propagated earthward?</p>

<p>My own mind,—far from a scientific one,—is not clear on this point.
I surmise, then, that the scientific mind might not only not be clear
as to the explanation, but equitably bound to say that it was no
explanation at all. Excuse the trouble I am giving you, for the truth’s
sake, and believe me, very faithfully yours,</p>

<p class="right"><span class="allsmcap">C. J. Gloucester and Bristol.</span></p>
</div>

<p>Maxwell replied as follows by return of post:—</p>

<p><span class="pagenum" id="Page_393">[Pg 393]</span></p>

<div class="blockquot">

<p class="right"><i>11 Scroope Terrace, Cambridge,<br>
Nov. 1876.</i></p>

<p><span class="allsmcap">My Lord Bishop</span>—The comparison of atoms or of molecules to
“manufactured articles,” was originally made by Sir J. F. D. Herschel
in his “Preliminary Discourse on the Study of Natural Philosophy,” Art.
28, p. 38 (ed. 1851, Longmans).</p>

<p>I send you by book post several papers in which I have directed
attention to certain kinds of equality among all molecules of the same
substance, and to the bearing of this fact on speculations as to their
origin.</p>

<p>The comparison to “manufactured articles” was criticised (I think in a
letter to <i>Nature</i>) by Mr. C. J. Monro [<i>Nature</i>, <span class="allsmcap">X</span>.
481, 15th October 1874], and the latter part of the <i>Encyc.
Brit.</i>, Article “Atom,” is intended to meet this criticism, which
points out that in some cases the uniformity among manufactured
articles is evidence of want of power in the manufacturer to adapt each
article to its special use.</p>

<p>What I thought of was not so much that uniformity of result which is
due to uniformity in the process of formation, as a uniformity intended
and accomplished by the same wisdom and power of which uniformity,
accuracy, symmetry, consistency, and continuity of plan are as
important attributes as the contrivance of the special utility of each
individual thing.</p>

<p>With respect to your second question, there is a statement printed in
most commentaries that the fact of light being created before the sun
is in striking agreement with the last results of science (I quote from
memory).</p>

<p>I have often wished to ascertain the date of the original appearance
of this statement, as this would be the only way of finding what “last
result of science” it referred to. It is certainly older than the time
when any notions of the undulatory theory became prevalent among men of
science or commentators.</p>

<p>If it were necessary to provide an interpretation of the text in
accordance with the science of 1876 (which may not agree with that of
1896), it would be very tempting to<span class="pagenum" id="Page_394">[Pg 394]</span> say that the light of the first
day means the all-embracing æther, the vehicle of radiation, and not
actual light, whether from the sun or from any other source. But I
cannot suppose that this was the very idea meant to be conveyed by the
original author of the book to those for whom he was writing. He tells
us of a previous darkness. Both light and darkness imply a being who
can see if there is light, but not if it is dark, and the words are
always understood so. That light and darkness are terms relative to the
creature only is recognised in Ps. <span class="allsmcap">CXXXIX.</span> 12.</p>

<p>As a mere matter of conjectural cosmogony, however, we naturally
suppose those things most primeval which we find least subject to
change.</p>

<p>Now the æther or material substance which fills all the interspace
between world and world, without a gap or flaw of \(\dfrac{1}{100000}\)
anywhere, and which probably penetrates through all grosser matters,
is the largest, most uniform and apparently most permanent object we
know, and we are therefore inclined to suppose that it existed before
the formation of the systems of gross matter which now exist within it,
just as we suppose the sea older than the individual fishes in it.</p>

<p>But I should be very sorry if an interpretation founded on almost
conjectural scientific hypothesis were to get fastened to the text in
Genesis, even if by so doing it got rid of the old statement of the
commentators which has long ceased to be intelligible. The rate of
change of scientific hypothesis is naturally much more rapid than that
of Biblical interpretations, so that if an interpretation is founded
on such an hypothesis, it may help to keep the hypothesis above ground
long after it ought to be buried and forgotten.</p>

<p>At the same time I think that each individual man should do all he can
to impress his own mind with the extent, the order, and the unity of
the universe, and should carry these ideas with him as he reads such
passages as the 1st Chap, of the Ep. to Colossians (see Lightfoot on
Colossians, p. 182), just as enlarged conceptions of the extent<span class="pagenum" id="Page_395">[Pg 395]</span> and
unity of the world of life may be of service to us in reading Psalm
viii.; Heb. <span class="allsmcap">II.</span> 6, etc. Believe me, yours faithfully,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">From the Bishop of Gloucester and Bristol.</span></p>

<p class="right"><i>Palace, Gloucester,<br>
24th Nov. 1876.</i></p>

<p><span class="allsmcap">Dear Professor Clerk Maxwell</span>—Allow me not to lose a post
in thanking you most warmly for your most kind letter and for the
packet of pamphlets,—for which I hardly know how enough to express
my gratitude. They are exactly what I needed,—yet I fear I may be
taking from your stock more than I ought to take. I have already read
a good deal of the <i>Encyc. Brit.</i> article on atoms; so pray, if
you are short of copies, don’t hesitate to drop me a line. The paper
on attraction was also most welcome. I am ashamed to own (for bishops
should not enter into these pleasures) that I have of late been
speculating a good deal on the physical explanation of gravitation. I
seem to feel it must be in the Ether,—and yet how, I see not. In the
case of a body near the earth, I can conceive a vast amount of elastic
ether behind it, and possibly urging it on, while a small quantity is
under it, being excluded by the earth.</p>

<p>I seem also to see how this might be applied to the case of the heavy
bodies that fell nearer to the steep side of Schehallion than they
ought to have done by calculation; but then, when I attempt to go
farther, I find the theory break down.</p>

<p>It seems to me that we want for several things, <i>e.g.</i> light, the
conception of an ether-beach all round the visible universe from which
waves might be reflexively started, and at which the particles might be
more closely packed; but then again I see not what it is that keeps up
the beach.</p>

<p>But I am really ashamed of troubling you, a scientific man, with
such wanderings. It will only show that your kindness is thoroughly
appreciated.</p>

<p>I cordially agree with you as to the light question. Theologians are
a great deal too fond of using up the last<span class="pagenum" id="Page_396">[Pg 396]</span> scientific hypothesis
they can get hold of. The Christian Knowledge Society are publishing
my charge. When it is published I shall ask you to do me the favour
to accept a copy. You will then see that the best note in the little
volume is due to your kindness and aid. I remain, with all good wishes,
and sincere thanks, very faithfully yours,</p>

<p class="right"><span class="allsmcap">C. J. Gloucester and Bristol.</span></p>

<p>(<i>P.S.</i>)—If you are in London in the spring and near the
Athenæum, do me the kindness of looking in on me, as I shall be
very glad to make your personal acquaintance. I am commonly in town
regularly after Easter.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, Christmas 1876.</i></p>

<div class="sidenote"><i>Æt.</i> 45.</div>

<p>... I hope that when this severe weather is past you will be able to
derive benefit from a moderate use of Plato and Sophocles.</p>

<p>We intended to have gone round by Edinburgh, to pay Aunt Jane a visit;
but we both had such bad colds that we came home to nurse them, and are
now snowed up, and enjoying the artificial heat of coals, peats, and
sticks judiciously intermingled.</p>

<p>The demonstrator at the Cavendish Laboratory has been out of sorts all
this term, and has had to go home about a month ago, so we have not
been in full force there. I hope he will be well in February, to absorb
the energy of the new B.A.’s set free from the Tripos and its attendant
anxieties.</p>

<p>As we get richer in apparatus, mathematical lectures give way to
experimental, and the black board to the lamp and scale. I have had a
pupil quite innocent of mathematics who has learned to measure focal
lengths of lenses, and has found the electro-motive force from the
water-pipes to the gas-pipes, and from either set of pipes to the
lightning-conductor.</p>

<p>I have been making a mechanical model of an induction coil, in which
the primary and secondary currents are represented by the motion of
wheels, and in which I can symbolise<span class="pagenum" id="Page_397">[Pg 397]</span> all the effects of putting in
more or less of the iron core, or more or less resistance and Leyden
jars in either circuit.</p>

<p>I have also been making a clay model of Prof. W. Gibb’s thermodynamic
surface, representing the relations of the solid liquid and gaseous
states, and the different paths by which a body may get from the one to
the other.—Your afft. friend,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">To W. Garnett</span>, Esq.<a id="FNanchor_233" href="#Footnote_233" class="fnanchor">[233]</a></p>

<p class="right"><i>Glenlair, 4th January 1877.</i></p>

<p>By all means take the Groves and coils for your lecture. Are you aware
that the electric flash is entirely due to the resinous particles of
electricity? This is well known on the stage, where they blow the
particles through a tube over a candle to make stage lightning. The
vitreous electricity has nothing to do with it, as you may prove by
using pounded glass.</p>
</div>


<p>In a letter to Mr. Garnett, dated Glenlair, 9th July 1877, Professor
Maxwell gave the following suggestions respecting a projected article
on Dynamics, and the letter, like those which follow it, is a good
illustration of the help he was constantly rendering to his students
and others who asked his advice:—</p>

<div class="blockquot">

<p>I think it a pity that the old historical word Dynamics should, for
mere considerations of time, be split up into Kinematics, Kinetics, and
Statics. With respect to the divisions of the subject, I think they
fall thus:—</p>

<p>1. Early attempts at founding the science, ancient Kinematics
(mechanical description of curves, etc.) generally correct.</p>

<p>Ancient Statics.—Archimedes.</p>

<p class="hanging2">
Modern Dynamics.—Galileo, first founder. Descartes, good up to
Kinematics and Statics, failed in Kinetics.</p>
</div>

<p><span class="pagenum" id="Page_398">[Pg 398]</span></p>

<div class="blockquot">

<p><i>Promoters</i>—</p>

<p class="nindc"><span class="allsmcap">Wren, Wallis, Huygens, Hooke.</span></p>

<p>Laws of collision established, and motion in a circle.</p>

<p class="nindc"><span class="allsmcap">Newton.</span></p>

<p>Three laws of motion. Form suggested by the laws of Descartes. Meaning
established by Newton’s own copious and complete examples of using them.</p>

<p>Second statement of Newton’s third Law.</p>

<p>My notions on the three laws are in “Matter and Motion.”</p>
</div>

<p class="nindc"><span class="allsmcap">Newtonians.</span></p>

<table class="autotable">
<tbody><tr>
<td class="tdl"><i>Cambridge School.</i></td>
<td class="tdl">&nbsp;&nbsp;&nbsp;<i>Popularisers.</i></td>
<td class="tdl">&nbsp;&nbsp;&nbsp;<i>Scotch School.</i></td>
</tr><tr>
<td class="tdl">Roger Cotes.</td>
<td class="tdl">D. Gregory.</td>
<td class="tdl">Colin Maclaurin.<a id="FNanchor_234" href="#Footnote_234" class="fnanchor">[234]</a></td>
</tr><tr>
<td class="tdl">Robert Smith, etc.</td>
<td class="tdl">Desaguliers.</td>
<td class="tdl">James Gregory.</td>
</tr><tr>
<td class="tdl">Attwood.</td>
<td class="tdl">Mme. du Chatelet</td>
<td class="tdl">J. Playfair.</td>
</tr><tr>
<td class="tdl">Whewell.</td>
<td class="tdl">and Voltaire.</td>
<td class="tdl">Ivory.</td>
</tr>
 </tbody>
</table>

<div class="blockquot">

<p>Leibniz and the Vis Viva Controversy.</p>

<p>Methods of dealing with connected systems.</p>

<p>Example of correct methods by Newton and others before D’Alembert.</p>

<p>D’Alembert’s enunciation.—Its historical importance.</p>

<p>Euler. The Bernoullis, etc. Laplace, the flower of this stage of
development.</p>

<p>Lagrange and Virtual Velocity.</p>

<p>This is the germ of the method of energy which was fully developed
in mathematical form in the <i>Mecanique Analytique</i>, but very
little appreciated outside the inner circle of mathematicians till the
physical theory of energy became generally known.</p>

<p>Mathematical development of higher dynamics. (See Cayley’s <i>Brit.
Ass. Report</i>, 1857 and 1862? specially Hamilton and Jacobi.)</p>

<p>Effect of T and T' since 1867.<span class="pagenum" id="Page_399">[Pg 399]</span> Kirchoffs notions in beginning of
Vorlesungen (not equal to Lagrange, but worth noticing).</p>

<p>I also think that Clausius’ equation and definition of “Virial” is
important.</p>

<p>The dynamics of other varieties of space than our own requires very
brief notice indeed.—Yours truly,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>


<p class="nindc"><span class="allsmcap">To W. Garnett, Esq.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 24th July 1877.</i></p>

<p>... There is a great slur over the word mechanics since a few poets and
biologists have misused it. Pratt thought it a fine word.</p>

<p>The result of motion without reference to time I call Displacement.
Kinematics must involve the idea of time if it treats of continuous
displacements, velocities, and accelerations, though it does not
contain within itself materials for comparing different intervals of
time. For this we must go to the science which deals with matter; call
it Kinetics, Dynamics, or Mechanics.</p>

<p>But I consider that Statics also deserves a place on the same level as
Kinematics, as it deals with the equivalence of different systems of
forces. But I do not agree with Whewell that Statics is more elementary
than Kinematics....</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 11th August 1877.</i></p>

<p>Your experiments on electrified paraffin oil are excellent, and may
lead to increase of knowledge.</p>

<p>If the fluid dielectric and also the air are perfect insulators,
nothing can get electrified, but the equation at the surface, instead
of being \(\mathrm{P}=\mathrm{P}_{0}\). will be
\[
\mathrm{P}+\left.\frac{1}{8 n}\left(\mathrm{K}^{2}-1\right) \frac{\overline{d \mathrm{V}}}{d \nu}\right|^{2}=\mathrm{P}_{0}
\]
(excluding capillary action) where \(\dfrac{d V}{d \nu}\) is the
resultant<span class="pagenum" id="Page_400">[Pg 400]</span> electric force normal to the surface and just outside it.
This causes the surface to rise wherever the normal force is great, or
close to the electrodes.</p>

<hr class="r5">

<p>The science of displacements is in Euc. I. 4, etc., and wherever
one figure is placed upon another. It belongs to the method of
contemplating the relations of two figures which may be supposed to
co-exist, though we may also suppose that they are copies of the same
figure in different positions.</p>

<p>But just as we assume that distance is a continuous quantity capable
of measurement, though all our attempts at measurement are made
with instruments made of non-rigid and discontinuous matter, so we
may assume that time is a continuously flowing quantity capable of
measurement, though we have not yet found out any accurate method of
comparing distant intervals of time.</p>

<p>Now Kinematics requires no more than this notion of time, as the
common independent variable \(t\). If we suppose that \(\tau\) is that
(unknown) which flows uniformly, then for kinematical purposes it is
enough that \(t\) is a function of \(t\); but when we come to Kinetics
proper we must have \(\dfrac{d^{2} t}{d \tau^{2}}\) very small.</p>

<p>Have you read Julius in <i>Nature</i>, about the beginning of June?
[14th June].</p>

<p>The most constant things we know are the properties of bodies. For
instance, water in equilibrium with ice and vapour gives us a good deal.</p>

<p>I. A unit of density (not the orthodox one) \(\dfrac{M}{L^{3}}=D\).</p>

<p>II. A unit of pressure (too small for practical use)
\(\dfrac{\mathrm{M}}{\mathrm{LT}^{2}}=\mathrm{P}\).</p>

<p>III. A unit of time (namely, the time of revolution of a satellite just
grazing a sphere of water) =\(\mathrm{T}\).</p>

<p>These three quantities being independent of each other
give \(\mathrm{M}\), \(\mathrm{L}\) and \(\mathrm{T}\).</p>

<p><span class="pagenum" id="Page_401">[Pg 401]</span></p>

<p>\(\dfrac{\mathrm{P}}{\mathrm{D}}\) gives a \((\text{velocity}^{2})\)
which could also be got from the \(\frac{\mathrm{P}}{\mathrm{D}}\) of
the vapour (a different one).</p>

<p>Then this gives also a standard temperature; all that we want is to get
pure water.</p>


<p class="nindc"><span class="allsmcap">To the Same.</span></p>

<p class="right"><i>Glenlair, 23d August 1877.</i></p>

<p>I have been copying Cavendish on the resistance of electrolytes. If
there is any one who would try a few of them roughly in the U tube,
it might be interesting to compare with Cavendish’s results. For weak
solutions Kohlrausch may be referred to.</p>
</div>

<p class="nindc"><i>Sea Salt (Chloride of Sodium.)</i></p>

<table class="autotable">
<tbody><tr>
<td class="tdc"></td>
<td class="tdc"><i>Experiments in January 1781.</i></td>
<td class="tdc"></td>
<td class="tdc"></td>
</tr><tr>
<td class="tdc">Watered to 1 of Salt.</td>
<td class="tdc"></td>
<td class="tdc">Resistance.</td>
<td class="tdc">Resistance \(\times\) quantity of Salt.</td>
</tr><tr>
<td class="tdl">Saturated sol.</td>
<td class="tdc">\(3 \cdot 78\)</td>
<td class="tdc">\(\cdot 602\)</td>
<td class="tdc"></td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">12</td>
<td class="tdc">\(1 \cdot 91\)</td>
<td class="tdc">\(\cdot 602\)</td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">30</td>
<td class="tdc">\(3 \cdot 97\)</td>
<td class="tdc">\(\cdot 500\)</td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">70</td>
<td class="tdc">\(8 \cdot 8\)</td>
<td class="tdc">\(\cdot 475\)</td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">143</td>
<td class="tdc">\(15 \cdot 75\)</td>
<td class="tdc">\(\cdot 352\)</td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">1000</td>
<td class="tdc">\(93 \cdot 02\)</td>
<td class="tdc">\(\cdot 352\)</td>
</tr><tr>
<td class="tdc"></td>
<td class="tdc">20,000</td>
<td class="tdc">\(18 \cdot 23\)</td>
<td class="tdc">\(\cdot 345\)</td>
</tr>
 </tbody>
</table>

<div class="blockquot">

<p>Salt in 20,000 conducts about 7 times better than distilled water.</p>

<p>Salt in 69 of water conducts 1·97 times better at \(105^{\circ}
\mathrm{F}.\) than at \(58 \frac{1}{2}^{\circ}.\).</p>

<p>If Professor Liveing is in Cambridge, could you ask him to put me in
the way of finding the best book on chemistry for the year 1777, so as
to obtain the equivalents and the names of salts used by Cavendish?</p>

<p>The numbers in the first columns are the quantities which were
equivalent to the “acid” in solution of 1 of salt in 29 of water.<span class="pagenum" id="Page_402">[Pg 402]</span>
\(3 \cdot 2\) Sal Sylvii (potassium chloride). \(2 \cdot 3\) Sal Amm.
(ammonium chloride). \(14 \cdot 10\) Calc. S.S.A. (?) \(2 \cdot 21\)
Calcined Glauber's Salt (sodium sulphate). \(3 \cdot 17\) Quadrangular
Nitre (sodium nitrate). \(5 \cdot 19\) Salt D. (?)</p>

<p>The solutions were 3, 10, 12.</p>

<p>I am going to try if this is Troy or Apothecaries’ weight.</p>

<p>Saturated solution (1 in 3·78) of common salt has 437,000 the
resistance of iron wire. New distilled water has more resistance than
distilled water kept a year.</p>

<p>All these results and many more were got by comparison of the strength
of shocks taken through Cavendish’s body. I think this series of
experiments is the most wonderful of them all, and well worth
verification.</p>

<hr class="r5">

<p>Cavendish is the first verifier of Ohm’s Law, for he finds by
successive series of experiments that the resistance is as the
following power of the velocity, 1·08, 1·03, ·980, and concludes that
it is as the first power. All this by the physiological galvanometer.</p>

<p>... Can you solve the equation
\[
\frac{d z}{d x}\left(\frac{d^{2} z}{d y^{2}}-2 \frac{d^{2} z}{d x d y}\right)+\frac{d z}{d y}\left(\frac{d^{2} z}{d x^{2}}-2 \frac{d^{2}
    z}{d x d y}\right)=0?
\]</p>

<p>\(z=\dfrac{\mathrm{A}}{x y}\) is a solution. Find the general ditto.</p>


<p class="nindc"><span class="allsmcap">To Professor Lewis Campbell.</span></p>

<p class="right"><i>11 Scroope Terrace,<br>
Cambridge, 5th January 1878.</i></p>

<div class="sidenote"><i>Æt.</i> 46.</div>

<p>It is more than a month that I have had your letter lying by me.
I am glad you like Chrystal. His departure is a great loss to the
laboratory, as it is difficult to find any one to take up heavy work.
W. D. Niven (brother of the competitor) is going in for a heavy
piece of work on conduction of heat in gases. I am no judge of Greek
plays,<span class="pagenum" id="Page_403">[Pg 403]</span> but I think that your success in choruses is fully equal to
that in dialogue, considering the greater difficulty, not only in
the interpretation, but in guessing the kind of effect, musical,
rhythmical, rhetorical, poetical, and pictorial, which was aimed at in
the delivery of the chorus.</p>

<p>We have all been conversing on the telephone. Garnett recognised
the voice of a man who called by chance. But the phonograph will
preserve to posterity the voices of our best speakers and singers. See
<i>Nature</i> of Jan. 3d.</p>


<p class="nindc"><span class="allsmcap">To W. Garnett, Esq.</span></p>

<p class="right"><i>Glenlair, 20th September 1878.</i></p>

<p>... Cavendish would speak of the pressure of a voltaic battery (only he
hadn’t one), but we require to be educated up to his mark.</p>


<p class="nindc"><span class="allsmcap">To the Librarian of the Royal Society.</span></p>

<p class="right"><i>Glenlair, Dalbeattie, 23d June 1879.</i></p>

<p><span class="allsmcap">Dear Sir</span>—Your information about FF.R.S. has been so useful to
me that I now ask about Dr. G. Knight, F.R.S., librarian to the British
Museum.</p>

<p>(1.) Is his name Gowan, Gowen, Gowin, or Godwin, for I find all four
spellings current?</p>

<p>(2.) Who is the author of the paper in <i>Phil. Trans.</i> for 1776
(near the end of the vol.) describing his great magazines of magnets?</p>

<p>(3.) Are the magazines [sketch shown] mounted like great guns still in
the possession of the R.S.?</p>

<p>(4.) Is the portrait of Gowin Knight, by Benjamin Wilson, F.R.S., among
the pictures of the R.S.?</p>

<p>I have got from the Meteorological Office some Cavendish MSS. on
Magnetism which prompt these enquiries and also this—</p>

<p>When the R.S. was at Crane Court had it a garden adjoining? Also, where
was Crane Court?</p>

<p>Henry Cavendish and his father Lord Charles worked together at
observations of the variation compass and dipping<span class="pagenum" id="Page_404">[Pg 404]</span> needle in the R.S.
room and garden. Are the variation compass and dipping needle still in
the R.S. collection?</p>

<p>Cavendish wrote out directions for using the dipping needle for Captain
Pickersgill, Captain Bayley, Dalrymple.</p>

<p>Dalrymple, I find from Poggendorff, was hydrographer to the H.E.I.C.
If Cavendish apportioned his instructions according to the capacity of
the recipients, then their capacities would be in descending order,
Dalrymple, Pickersgill, Bayley. Were any of these F.R.S.?</p>

<p>Also, was John Walsh, F.R.S., also M.P.?</p>

<p>Do not answer any of these questions which would involve trouble, but
I have not here any means of answering them except by the aid of those
who are among the records of the past. None of the questions are of
vital importance, because I can leave out any statements I have made
which are doubtful.—Yours very truly,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>
</div>

<p>Professor Maxwell was frequently invited to join the Victoria
Institute, and in March 1875 he received a letter from the secretary
conveying the special invitation of the President and Council to
join the Society, “among whose members are his Grace the Archbishop
of Canterbury, and other prelates and leading ministers, several
professors of Oxford and Cambridge and other universities, and many
literary and scientific men.” The following is all that has been found
of a rough draft of his reply:—</p>

<div class="blockquot">

<p><span class="allsmcap">Sir</span>—I do not think it my duty to become a candidate for
admission into the Victoria Institute. Among the objects of the Society
are some of which I think very highly. I think men of science as well
as other men need to learn from Christ, and I think Christians whose
minds are scientific are bound to study science that their view of the
glory of<span class="pagenum" id="Page_405">[Pg 405]</span> God may be as extensive as their being is capable of. But I
think that the results which each man arrives at in his attempts to
harmonise his science with his Christianity ought not to be regarded as
having any significance except to the man himself, and to him only for
a time, and should not receive the stamp of a society. For it is of the
nature of science, especially of those branches of science which are
spreading into unknown regions to be continually——[here the MS. ends].</p>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_217" href="#FNanchor_217" class="label">[217]</a> 
On 23d February, Professor Stokes (who had been urgent
in pressing Maxwell to stand) wrote to him:—“I am glad you have
decided to come forward.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_218" href="#FNanchor_218" class="label">[218]</a> 
Throughout the tenure of his Cambridge Chair Maxwell
annually delivered a course of lectures on Heat and the Constitution of
Bodies during the October Term; on Electricity in the Lent Term; and on
Electro-Magnetism in the Easter Term. The character of these lectures
very much resembled that of the early chapters in the <i>Elementary
Treatise on Electricity</i>, which he wrote before taking the Cavendish
papers in hand, and which was published in a fragmentary form by the
Delegates of the Clarendon Press in October 1881. During the first four
or five years that Maxwell lectured in Cambridge, candidates for the
Ordinary or Poll Degree were compelled to attend professors’ lectures,
and not unfrequently they would appear at the Cavendish Laboratory.
Maxwell’s lectures were the delight of those who could follow him in
his brilliant expositions and rapid changes of thought.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_219" href="#FNanchor_219" class="label">[219]</a> 
Professor Westcott’s utterance on the same occasion,
though less immediately relevant, ought not to be omitted:—“It was
impossible to think of him whom they had so lately lost, to whom first
the charge of the Cavendish Laboratory had been committed, Prof.
Clerk Maxwell, and to recollect his genius and spirit, his subtle and
profound thought, his tender and humble reverence, without being sure
that that close connection between Physics and Theology which was
consecrated by the past was still a living reality among them. That was
an omen for the future. He felt, as probably all present felt, that he
owed a deep debt of gratitude to him, both for his researches, and for
the pregnant words in which he gathered up their lessons.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_220" href="#FNanchor_220" class="label">[220]</a> 
See <a href="#PART_II">Part II</a>. In the official handbook to the collection,
the articles entitled “General considerations respecting Scientific
Apparatus” and “Molecular Physics,” were written by Professor Maxwell.
When her Majesty the Queen visited the collection Professor Maxwell, at
the invitation of the Lords of the Committee of Council on Education,
attended as the representative of Molecular Physics.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_221" href="#FNanchor_221" class="label">[221]</a> 
Maxwell had profited not a little by his own studies in
this direction. But the Gallowegian tones are hard to modify, and even
in his verse such rhymes as “hasn’t” = “pleasant” recall to those who
knew him his peculiar mode of speech.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_222" href="#FNanchor_222" class="label">[222]</a> 
How readily his thoughts took a serious turn, even in
the earlier undergraduate days, may be seen in a letter (not given
above) of 26th March 1852:—</p>

<div class="sidenote"><i>Æt.</i> 20.</div>

<p>“A. was sent for by telegraph to his sister: he found her past
recovery, and she is since dead. The family is large, and till now was
entire, so that the grief is great and new.</p>

<p>“The attributes of man, as one of a family, seem to be more highly
developed in large families. The pronoun ‘we’ acquires a peculiar
significance. The family man has an idea of a <i>living</i> home, to
which he can in imagination retreat, and which gives him a steadiness
and force not his own. He is one member of a naturally constituted
society; he has protected his juniors and been protected by his
seniors; and now he has the consciousness that he is but one of the
arrows in the quiver of the Mighty, and that it is the interest of
others as well as his own that he should succeed.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_223" href="#FNanchor_223" class="label">[223]</a> 
There was found amongst his papers a scrap on which he
had written, in pencil, the whole of Shelley’s “Ode to the West Wind,”
in all probability from memory, and as a distraction from anxiety or
from severer study. His note-books, one of which he always carried
with him, are full of the most miscellaneous jottings, plans of works,
solutions of problems, extracts in prose and verse, etc.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_224" href="#FNanchor_224" class="label">[224]</a> 
For an instance of tumorous mystification, see the
letter to Mr. Garnett of 4th January 1877.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_225" href="#FNanchor_225" class="label">[225]</a> 
He kept up the old habit of regulating the clocks at
Glenlair by the sun, which, when on the meridian, threw the shadow of a
stick upon a notch cut in the stone outside the door.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_226" href="#FNanchor_226" class="label">[226]</a> 
An account of the last years of Maxwell’s life would not
be complete without a reference to his acquaintance with Professor H.
A. Rowland, formerly of Troy, and now of the Johns Hopkins University,
Baltimore. Professor Rowland visited Maxwell more than once, and on
these occasions much time was spent in comparing notes on electrical
questions. Some instruments which Professor Rowland designed were not
only identical with Maxwell’s in the relative dimensions of the several
parts, but their absolute dimensions also were very nearly the same.
After Maxwell’s death Professor Rowland pointed out some sources of
error in the experimental determination of the Ohm as carried out at
King’s College, and in the recent redetermination made by Lord Rayleigh
in the Cavendish Laboratory these sources of error have been removed.
Maxwell’s opinion of Professor Rowland was very high, and he frequently
alludes to him in his correspondence, and more than once “Rowland
of Troy, that doughty knight,” appears in his verses, where, as the
American investigator in a certain branch of magnetic science studied
here by Professor Oliver Lodge and Mr. Oliver Heaviside, he is in one
place referred to as “One Rowland for two Olivers.” I well remember
the interest with which Maxwell looked forward to Mr. Rowland’s first
visit, and the meeting of “Greek and Trojan” on that occasion at
Glenlair.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_227" href="#FNanchor_227" class="label">[227]</a> 
An unfinished fragment of a new work on Electricity, in
which he treads more closely than ever in the steps of Faraday, has
been edited since his death by Mr. Garnett and published in 1881.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_228" href="#FNanchor_228" class="label">[228]</a> 
Royal Institution.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_229" href="#FNanchor_229" class="label">[229]</a> 
The name of an Assyrian harp of the shape \(\nabla\).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_230" href="#FNanchor_230" class="label">[230]</a> 
See the <i>Cambridge Journal of Philology</i>, vol.
<span class="allsmcap">V.</span>, No. 10, pp. 206, foll.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_231" href="#FNanchor_231" class="label">[231]</a> 
Alluding to the passage of Plato’s <i>Timœus</i>, p. 40,
which had given rise to the previous discussion.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_232" href="#FNanchor_232" class="label">[232]</a> 
Tennyson’s <i>In Memoriam</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_233" href="#FNanchor_233" class="label">[233]</a> 
See <a href="#Page_370">p. 370.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_234" href="#FNanchor_234" class="label">[234]</a> 
Introduces \(\mathrm{M} \dfrac{d^{2} x}{d
t^{2}}=\mathrm{X}\) etc. See Maclaurin’s <i>Fluxions</i>.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_406">[Pg 406]</span></p>
<h2 class="nobreak" id="CHAPTER_XIII">CHAPTER XIII.<br>
<span class="allsmcap">ILLNESS AND DEATH—1879—<i>ÆT.</i> 47, 48.</span></h2>
</div>

<p class="nind">
AFTER his recovery from the attack of erysipelas at Glenlair
in 1865, Maxwell's health appears to have been fairly good until the
spring of 1877. He then began to be troubled with dyspeptic symptoms,
especially with a painful choking sensation after taking meat. He
consulted no one for about two years. But one day in 1877, on coming
into the Laboratory after his luncheon, he dissolved a crystal of
carbonate of soda in a small beaker of water, and drank it off. A
little while after this he said he had found how to manage so as to
avoid pain. The trouble proved obstinate, however, and at last, on the
21st of April 1879, he mentioned it when writing to Dr. Paget about
Mrs. Maxwell.</p>

<p>By this time his friends at Cambridge had begun to observe a change
in his appearance, and some failure of the old superabundant energy.
They missed the elasticity of step, and the well-known sparkle in his
eye. During the Easter Term of 1879 he attended the Laboratory daily,
but only stayed a very short time. At the end of the term he remarked
that he had been unable to do much more than to<span class="pagenum" id="Page_407">[Pg 407]</span> give his lectures. And
before leaving Cambridge for the vacation, he was more than once very
seriously unwell.</p>

<p>In June he returned, as usual, to Glenlair. His letters continued to be
marked by humorous cheerfulness, and, as was always the case, contained
information about everything and everybody except himself. He was still
unwearied in his exertions for those to whom his services could be
of use. But some casual remarks gave cause for apprehension that he
was not gaining strength, and after he had been in Scotland for a few
weeks he wrote that “he felt like a child, as for some time he had been
allowed no food but milk.” By and by the reports were more encouraging,
and in September, according to appointment, Mr. and Mrs. Garnett were
received at Glenlair. On Maxwell’s coming out of the house to welcome
them, Mr. Garnett saw a great change in him, and was for the first time
seriously alarmed.</p>

<p>In the evening, however, the master of the house conducted family
worship as usual for the assembled household. And the days passed much
in the same kindly fashion as of old, linking the present to the past
in “natural piety.” There were the drawings of the oval curves of 1846;
the family scrap-book, with Mrs. Blackburn’s water-colour sketches from
the earliest time; the Glenlair autograph book (see above, p. 16); the
bagpipes which saved the life of Captain Clerk in the Hooghly; and a
host of other treasures which Maxwell took delight in showing. He led
his guests down to the river, and accompanied them a<span class="pagenum" id="Page_408">[Pg 408]</span> little way along
its wooded banks, pointing out where the stepping-stones used to be,
where he bathed when a boy, and where the exploit of tub-navigation had
been performed. This was the longest walk he had taken for some time.
He was unable to drive with them in the afternoon, because he could not
bear the shaking of the carriage.</p>

<p>On the 2d of October 1879, in the midst of great weakness and of great
pain, he was told by the late Dr. Sanders of Edinburgh, who had been
summoned to Glenlair, that he had not a month to live. From that moment
he had only one anxiety, the same which had for so long been his chief
care—to provide for <i>her</i> comfort, whom he now saw that he must
leave behind.</p>

<p>He returned to Cambridge; but he was so weak as to be hardly able to
walk from the train to a carriage. Under the diligent care of Dr.
Paget his most painful symptoms were considerably relieved, and his
friends began to entertain fond hopes of his recovery. But his strength
gradually failed, and at length it was evident to all that the disease
could not be stayed.</p>

<p>During the last few weeks his sufferings were very great, but he
seldom mentioned them; and, apart from his anxiety for others, his
mind was absolutely calm. The one thought which weighed upon him,
and to which he constantly referred, was for the future welfare and
comfort of Mrs. Maxwell. During the whole period of their married life
(twenty-one years) his ever-present watchfulness and sympathy had
supported her even in the smallest domestic<span class="pagenum" id="Page_409">[Pg 409]</span> concerns; his knowledge,
his constructiveness, his dexterity of hand, had been ever ready to
minister to her slightest need,—and now, unable to nurse him as of
old, she seemed more than ever dependent on his care. To the last, he
regularly gave the orders that were necessary for her comfort, and
endeavoured to see that they were carried out.</p>

<p>When too weak to dwell on those scientific inquiries which had been the
work of his life, his mind continued active about many of his favourite
studies. He remarked one day that he had been wondering why the lines
in Shakespeare’s <i>Merchant of Venice</i>, about the harmony that is
in mortal souls (repeating the whole passage) should have been put in
the mouth of such a frivolous person as Lorenzo. At another time, when
continuous conversation had become impossible, and he had been lying
for some time with closed eyes, he looked up and repeated the verse,
“Every good gift and every perfect gift is from above,” etc., and then
added—“Do you know that that is a hexameter? πα̂σα δόσις άγαθὴ καὶ
πα̂ν δώρημα τέλειον. I wonder who composedit?” He frequently quoted
Richard Baxter’s hymn—</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Lord, it belongs not to my care,</div>
    <div class="verse indent2">Whether I die or live;</div>
    <div class="verse indent0">To love and serve Thee is my share,</div>
    <div class="verse indent2">And that Thy grace must give,” etc.</div>
  </div>
</div>
</div>

<p>On the Saturday preceding his death he received the Sacrament of the
Lord’s Supper from Dr. Guillemard, and it was while Dr. G. was putting
on his<span class="pagenum" id="Page_410">[Pg 410]</span> surplice that Maxwell repeated to him George Herbert’s lines on
the priest’s vestments, entitled <i>Aaron</i>.<a id="FNanchor_235" href="#Footnote_235" class="fnanchor">[235]</a> Maxwell’s mind and
memory remained perfectly clear to the very last.</p>

<p>The fortitude with which he bore his sufferings, and the calm
self-possession with which he met his end, impressed those most who
watched him most<span class="pagenum" id="Page_411">[Pg 411]</span> narrowly, and had the best reason to know the
acuteness of his sufferings.</p>

<p>The end may best be told by those who were nearest to him at the time.
I have been favoured with the following communications:—(1) From Dr.
Paget; (2) from the Rev. Dr. Guillemard; and (3) from his cousin, Mr.
Colin Mackenzie, who acted the part of a brother at the last, as he had
done many a time before.</p>

<div class="blockquot">

<p class="nindc">(1.) Dr. Paget's Statement.</p>

<p>In April 1879 he began to be troubled with some difficulty in
swallowing—the first significant symptom of the disease which was to
prove fatal. The summer he spent at Glenlair. At the end of July he
consulted Prof. Sanders and Prof. Spence of Edinburgh, and while at
Glenlair was attended by Dr. Lorraine of Castle-Douglas. But he grew
worse, and at the end of September Prof. Sanders was summoned to him
from Edinburgh. He was then suffering from attacks of violent pain, had
become dropsical, and his strength was rapidly fading. At Glenlair he
was seven miles from Dr. Lorraine. It was therefore decided to remove
him to Edinburgh or Cambridge. He chose Cambridge, and arrived there on
October 8, accompanied by Mrs. Maxwell, and attended during the journey
by Dr. Richard Lorraine.</p>

<p>In Cambridge his more severe sufferings were gradually in great measure
relieved, but the disease continued its progress. It was the disease of
which his mother had died at the same age.</p>

<p>As he had been in health, so was he in sickness and in face of death.
The calmness of his mind was never once disturbed. His sufferings were
acute for some days after his return to Cambridge, and, even after
their mitigation, were still of a kind to try severely any ordinary
patience and fortitude. But they were never spoken of by him in a<span class="pagenum" id="Page_412">[Pg 412]</span>
complaining tone. In the midst of them his thoughts and consideration
were rather for others than for himself.</p>

<p>Neither did the approach of death disturb his habitual composure.
Before leaving Glenlair he had learnt from Prof. Sanders that he had
not more than about a month to live. A few days before his death he
asked me (Dr. Paget) how much longer he could last. The inquiry was
made with the most perfect calmness. He wished to live until the
expected arrival from Edinburgh of his friend and relative Mr. Colin
Mackenzie. His only anxiety seemed to be about his wife, whose health
had for a few years been delicate, and had recently become worse. He
had been to her for some time the most tender and assiduous of nurses.
An hour only before his death, when, through extreme bodily weakness,
his voice was reduced to a whisper so feeble that it could be heard
only when the ear was held close to his mouth, the words whispered to
Dr. Paget related not to himself but to Mrs. Maxwell.</p>

<p>His intellect also remained clear and apparently unimpaired to the
last. While his bodily strength was ebbing away to death, his mind
never once wandered or wavered, but remained clear to the very end. No
man ever met death more consciously or more calmly.<a id="FNanchor_236" href="#Footnote_236" class="fnanchor">[236]</a></p>

<p>On November 5 he gently passed away.</p>
</div>

<p><span class="pagenum" id="Page_413">[Pg 413]</span></p>

<div class="blockquot">

<p>Dr. Paget’s report of Maxwell’s composure throughout his illness is
very strikingly confirmed by his letter to that physician, dated
October 3, which is too confidential to be inserted here, but consists
of a simple unadorned description of the facts of the case, and a
request for aid which he knew would be forthcoming. A stranger, in
reading that letter, would never divine, and indeed might find it hard
to believe, that on <i>the previous day</i> (Oct. 2) the writer had
been told by medical authority that he had only a month to live. Yet
such is the fact. The words “for I am really very helpless,” however
touching as a description of his condition, are merely the statement
of a reason why some one should be got “officially to help” Maxwell
himself, but really and chiefly to do for Mrs. Maxwell what he had
done so long as he had any strength in him. Students of history
may perhaps recall Nicias’s letter to the Athenians:—“You should
also send a general to succeed me, for I have a disease, and cannot
remain;”<a id="FNanchor_237" href="#Footnote_237" class="fnanchor">[237]</a> but the words of the unfortunate general, “I claim your
indulgence,”<a id="FNanchor_238" href="#Footnote_238" class="fnanchor">[238]</a> though dignified enough, are more than Maxwell would
have written.</p>
</div>

<p><span class="pagenum" id="Page_414">[Pg 414]</span></p>

<p>(2.) The following letter, addressed to me by the Rev. Dr. Guillemard,
of the Little Trinity Church, Cambridge, may be left to speak for
itself:—</p>

<div class="blockquot">

<p class="right"><i>Cambridge, 19th May 1881.</i></p>

<p><span class="allsmcap">My dear Sir</span>—I shall disappoint you very much in my
reminiscences of Maxwell. I never was an <span class="allsmcap">intimate friend</span>
of his, though we were always on the very best terms, and met not
unfrequently, and he was most constant and assiduous in his attendance
at church, and interested in all church matters.</p>

<p>But I knew very little about his <i>inner self</i> before I was
summoned to his dying bed; and he had been brought very low
physically, before his return to Cambridge, and was unequal to much
<i>continuous</i> thought or conversation. He welcomed me warmly
whenever I visited him, joined fervently in all acts of prayer,
listened with a most intelligent interest to all I read, either out of
the Bible (which he knew well-nigh by heart) or out of any of our great
devotional writers in prose or poetry; was especially fond of any new
hymns, and frequently capped such by reciting from his wonderful memory
some parallel passages of his favourite old authors, specially George
Herbert.</p>

<p>His faith in the grand cardinal verities was firm, simple, and full;
and he avowed it humbly but unhesitatingly, with the deepest gratitude
for the revelation of the truth in Jesus. I do not think he had any
doubts or difficulties to cloud his clear mind or shake his peace.</p>

<p>He was calmly and serenely resigned to the will of God, and bowed in
meek acquiescence before what he believed to be the Word of God.</p>

<p>I never saw a sign of impatience or fretfulness under all his long
suffering, or heard an approach to a murmur. His one and only care
was for his wife. It was a grand sight to see him day by day girding
himself calmly and resolutely for the last struggle, and he passed
through it undismayed. I wish I had preserved any of his last words:
they have passed away from my shallow memory.—Yours very truly,</p>

<p class="right"><span class="allsmcap">W. H. Guillemard.</span></p>
</div>

<p>I am also permitted to insert the following more circumstantial
account, which was written by Dr.<span class="pagenum" id="Page_415">[Pg 415]</span> Guillemard to the Rev. Isaac Bowman,
Vicar of South Creake, Fakenham, Norfolk, on the 9th of December 1879,
within five weeks after Maxwell's death:—</p>

<div class="blockquot">

<p>He suffered exquisite pain, hardly able to lie still for a minute
together, sleepless, and with no appetite for the food which he so
required.</p>

<p>He understood his position from the first; knew what it all meant, and
calmly girded himself for the awful struggle. He welcomed me at once
as visiting him, not only as a friend, but as the Parish Priest come
to assist him and to minister to him, and spoke of our relations with
a grave, simple cheerfulness. You know the lightheartedness of the
man in ordinary times; and really it abode on him throughout; he was
never downcast or overburdened, and yet he was the humblest and most
diffident of men, with the deepest sense of his own unworthiness, of
his many short-comings, of his neglected opportunities. “But he loved
much, and love had cast out fear.” I used to go to him nearly every
day of the five or six weeks he was here, to read and pray with him.
He preferred the prayers of the Church, and asked for them, and by the
wonderful power of his memory knew them all by heart; but he gladly
joined in other devotions, and took special delight in sacred poetry,
of which I generally read him two or three short pieces.</p>

<p>He knew all our best writers in that line thoroughly: Milton, Keble,
Newman, Wesley, George Herbert—the latter his chief favourite; and
he repeated to me the morning after an unusually bad night, the five
stanzas of “Aaron” without a mistake. His knowledge of the Bible
was remarkable, and he constantly asked for his most deeply-prized
passages. Four days before he was removed from us he received the Holy
Communion at my hands, with holy, reverent, fervid devotion, and said
what strength it gave him.</p>

<p>I saw him only once again; he was too weak and restless and exhausted
for much intercourse; but as I rose from my knees he said:—“My dear
friend, you have been<span class="pagenum" id="Page_416">[Pg 416]</span> a true under shepherd to me: read me, before you
go, the beautiful prayer out of the Burial Service, 'Suffer me not at
my last hour’”—and his grasp of my hand, as we parted, told me all he
felt.</p>

<p>I had known but little of his inner self before his illness; he was
singularly reticent; and though we occasionally discussed a text
critically, we rarely got upon doctrine, or anything that touched upon
the spiritual life. He was a constant regular attendant at church,
and seldom, if ever, failed to join in our monthly late celebration
of Holy Communion, and he was a generous contributor to all our
parish charitable institutions. But his illness drew out the whole
heart and soul and spirit of the man: his firm and undoubting faith
in the Incarnation and all its results; in the full sufficing of the
Atonement; in the work of the Holy Spirit. He had gauged and fathomed
all the schemes and systems of philosophy, and had found them utterly
empty and unsatisfying—“unworkable” was his own word about them— and
he turned with simple faith to the Gospel of the Saviour.</p>
</div>

<p>(3.) Mr. Colin Mackenzie, who is by this time well known to the reader,
was present at the last. He says:—</p>

<div class="blockquot">

<p>A few minutes before his death, Professor Clerk Maxwell was being held
up in bed, struggling for breath, when he said slowly and distinctly,
“God help me! God help my wife!” he then turned to me (Mr. Mackenzie)
and said, “Colin, you are strong, lift me up;” He next said, “Lay me
down lower, for I am very low myself, and it suits me to be low.” After
this he breathed deeply and slowly, and, with a long look at his wife,
passed away.</p>
</div>

<p><span class="pagenum" id="Page_417">[Pg 417]</span></p>

<p>(4.) Another friend who saw him in his last illness, the Rev. Professor
Hort, has summed up his recollections of Maxwell, especially of the
graver side of his character, in the following letter:—</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">From Prof. F. J. A. Hort to Prof. L. Campbell.</span></p>

<p class="right"><i>Feb. 4, 1882.</i></p>

<p>It is with extreme regret that I find myself powerless to comply with
your request that I should contribute to your Memoir of Professor
Maxwell a sketch of his position in reference to theology and religion.
A competent and faithful account of Maxwell’s inner thoughts during
manhood would for several reasons have been of the highest interest.
But his habitual reticence as to all that moved him deeply, and my own
bad memory, have together left me without the materials needed for a
task in itself most attractive. Though the impression of rare greatness
which he left upon me in the first days of our acquaintance became
stronger and stronger to the end, I have little to offer but a few
vague and scattered reminiscences. Such as they are, I am thankful to
be allowed to send them.</p>

<p>My earlier recollections of Maxwell are chiefly associated with a small
society at Cambridge to which we both belonged, which used to meet
on Saturday evenings for the discussion of literary and speculative
questions. The aversion to rhetoric which he found traditional among
its members was much to his taste, and he always took an animated
and interested part in the conversations. Unfortunately his love of
speaking in parables, combined with a certain obscurity of intonation,
rendered it often difficult to seize his meaning; but bright and
penetrating little sayings, usually whimsical in form, and sometimes
accompanied by strange gestures, recurred almost unfailingly at no
distant intervals. Whether the tone of his mind was much affected by
his participation in our discussions it is difficult to say. During
the time that I knew him I can recall no perceptible signs of change
other than quiet growth, and suspect that he attained too early and too
stable a maturity to receive easily a new direction from any kind of
intercourse with his University contemporaries. But it is likely enough
that his mind was at least invigorated and consolidated by an influence
which others have found reason to count among the strongest and also on
the whole most salutary that they have known.<span class="pagenum" id="Page_418">[Pg 418]</span> The same may probably
be said of the influence of Mr. Maurice's writings, which certainly
occupied Maxwell at this time. To what extent he was affected by them
I do not know; but the tone in which he used to speak of Mr. Maurice
leads me to think that they must have at least given him considerable
aid in the adjustment and clearing up of his own beliefs on the highest
subjects.</p>

<p>My intercourse with Maxwell dropped when we both left Cambridge. When I
returned in 1872, after an absence of fifteen years, he had lately been
installed at the new Cavendish Laboratory, and I had the happiness of
looking forward to a renewal of friendship with him. I found him, as
was natural, a graver man than of old; but as warm of heart and fresh
in mind as ever. Owing to accidental circumstances on both sides, we
met seldomer than I had hoped, though certainly there was no diminution
of cordiality on the part of either. Strangely enough, it was again to
the meetings of a small society, in purpose not unlike the former, that
I owe most of my impressions of Maxwell in these later years. Though
he was often unable to attend its meetings, and could rarely stay for
more than an hour, he seemed to find much satisfaction in thus joining
in the discussion of speculative questions with a few friends, chiefly
middle-aged men, representing among them great diversity of studies,
and no less diversity of opinion. The old peculiarities of his manner
of speaking remained virtually unchanged. It was still no easy matter
to read the course of his thoughts through the humorous veil which they
wove for themselves; and still the obscurity would now and then be lit
up by some radiant explosion.</p>

<p>Perhaps the most noteworthy of Maxwell’s characteristics was his
absolute independence of mind, an independence unsullied by conceit
or consciousness. Preserved by his simplicity and humility from any
fondness for barren paradox, he endeavoured always to see things with
his own eyes, without regard to the points of view assumed on one
side or another in ordinary controversy: in a word, he was more free
from “notionalism” than any one whom I have known.<span class="pagenum" id="Page_419">[Pg 419]</span> The testimony of
his unshaken faith to Christian truth was, I venture to think, of
exceptional value on account of his freedom from the mental dualism
often found in distinguished men who are absorbed chiefly in physical
inquiries. It would have been alien to his whole nature to seclude any
province of his beliefs from the free exercise of whatever faculties he
possessed; and in his eyes every subject had its affinities with the
rest of the universal truth. His strong sense of the vastness of the
world not now accessible to human powers, and of the partial nature of
all human modes of apprehension, seemed to enlarge for him the domain
of reasonable belief. Thus in later years it was a favourite thought
of his that the relation of parts to wholes pervades the invisible no
less than the visible world, and that beneath the individuality which
accompanies our personal life there lies hidden a deeper community
of being as well as of feeling and action. But no one could be less
of a dreamer, or less capable of putting either fancies or wishes in
the place of sober reality. In mind, as in speech, his veracity was
thorough and resolute: he carried into every thought a perfect fidelity
to the divine proverb which hung beside yet more sacred verses on the
wall of his private room, “The lip of truth shall be established for
ever.”</p>

<p>During Maxwell’s last illness I had the privilege of enjoying two
conversations with him; and not long afterwards I put on paper a
short and desultory record of some of his words. These notes contain
nothing that might not with propriety be brought under other eyes, and
therefore I venture to quote them here. Most of what passed on these
two occasions presented nothing worthy of remark, unless it be the
cheerful naturalness with which Maxwell spoke on all the varied topics
that happened to come up before us. His thoughts had evidently been
mainly taking a retrospective direction; and every interest of life
seemed to be hallowed and brightened by the probable nearness of the
Divine summons to a new form of existence.</p>

<p>He told me briefly the story of his illness; how he had been ailing
all the year, but had gone northward after<span class="pagenum" id="Page_420">[Pg 420]</span> Easter Term without
apprehending anything worse than transient ill-health. He had taken
with him Professor Clifford’s <i>Lectures and Essays</i> which he had
been asked to review. He had read them with close attention for the
purpose, and had then, at some time in the summer, prepared to write
his criticism. It was a difficult and delicate task, he said, for
“there were many things in the book that wanted trouncing, and yet the
trouncing had to be done with extreme care and gentleness, Clifford was
such a nice fellow.” As soon as he tried to begin, his brain refused
its office, and he found himself incapable of composition; and then he
knew that his illness had become serious.</p>

<p>Something, I forget what, led the conversation to the perilousness
of strong religious excitement in early youth, on account of the
spiritual exhaustion and permanent religious insensibility that are
apt to follow the dying-out of the original fervour, and that derive a
plausible justification from the premature and fallacious experience.
He spoke with thankfulness of his own escape from a similar danger.
“The ferment,” he said, “about the Free Church movement had one very
bad effect. Quite young people were carried away by it; and when the
natural reaction came, they ceased to think about religious matters
at all, and became unable to receive fresh impressions. My father was
so much afraid of this, that he placed me where I should be under the
influence of Dean Ramsay, knowing him to be a good and sensible man.</p>

<p>“My father was an advocate. This added much to his usefulness in the
country. He was always fond of inventing plans for country houses;
his note-books shew that he did this as early as when he was twelve
years old. He wanted to build his house on a scale suited to what he
thought he would require as sheriff, and had so built a small part
of it when he died. We afterwards completed it, as far as possible
according to his idea, but on a much smaller scale. He had wished me to
be an advocate; but I never attended law classes, as by that time it
had already become apparent that my tastes lay in another direction.
Moreover, he looked<span class="pagenum" id="Page_421">[Pg 421]</span> up greatly to James Forbes, and desired that I
should be like him. My father died before my marriage, and before I
had been actually elected Professor at Aberdeen. He had been greatly
interested in the sending in of offers of application. He much wished
me to have a Scottish Professorship, that I might have the long
vacation free for living at home.</p>

<p>“My interest is always in things rather than in persons. I cannot help
thinking about the immediate circumstances which have brought a thing
to pass, rather than about any will setting them in motion. What is
done by what is called myself is, I feel, done by something greater
than myself in me. My interest in things has always made me care much
more for theology than for anthropology; states of the will only puzzle
me. I cannot ascribe so much to a depraved will as some people do,
though I do to a certain extent believe in it. Much wrong-doing seems
to be no more than not doing the right thing; and that finite beings
should fail in that does not seem to need the supposition of a depraved
will.” On my saying that, though the immediate cause of the miseries
of the world is oftener folly than wickedness, yet men’s folly can
frequently be traced back to past misdoing on their part, he warmly
assented, and then added in a different strain: “They were foolish
because they did not ask for wisdom,—not, of course, absolute wisdom,
but the wisdom needed for the moment.</p>

<p>“I have been thinking how very gently I have been always dealt with. I
have never had a violent shove in all my life.</p>

<p>“The only desire which I can have is like David to serve my own
generation by the will of God, and then fall asleep.”</p>
</div>

<p>The unexampled impression which his death produced at Cambridge was
due to other causes besides his scientific eminence. Those who lived
so near to him, though they saw little of him, could not fail to have
some feeling of the man. Some rumours of his<span class="pagenum" id="Page_422">[Pg 422]</span> wonderful peacefulness in
suffering had gone far enough to touch many hearts. And it was a deep
and widely-spread emotion which found a voice that Sunday in St. Mary’s
Church, through the mouth of one who had known him when both were
scholars of Trinity—the Rev. Dr. Butler, the distinguished headmaster
of Harrow School:—</p>

<div class="blockquot">

<p>It is a solemn thing—even the least thoughtful is touched by it—when
a great intellect passes away into the silence, and we see it no
more. Such a loss, such a void, is present, I feel certain, to many
here to-day. It is not often, even in this great home of thought and
knowledge, that so bright a light is extinguished as that which is
now mourned by many illustrious mourners, here chiefly, but also far
beyond this place. I shall be believed when I say in all simplicity
that I wish it had fallen to some more competent tongue to put into
words those feelings of reverent affection which are, I am persuaded,
uppermost in many hearts on this Sunday. My poor words shall be few,
but believe me they come from the heart. You know, brethren, with what
an eager pride we follow the fortunes of those whom we have loved and
reverenced in our undergraduate days. We may see them but seldom, few
letters may pass between us, but their names are never common names.
They never become to us only what other men are. When I came up to
Trinity twenty-eight years ago, James Clerk Maxwell was just beginning
his second year. His position among us—I speak in the presence of many
who remember that time—was unique. He was the one acknowledged man of
genius among the undergraduates. We understood even then that, though
barely of age, he was in his own line of inquiry not a beginner, but
a master. His name was already a familiar name to men of science. If
he lived, it was certain that he was one of that small but sacred band
to whom it would be given to enlarge the bounds of human knowledge.
It was a position which might have turned the head of a smaller<span class="pagenum" id="Page_423">[Pg 423]</span>
man; but the friend of whom we were all so proud, and who seemed, as
it were, to link us thus early with the great outside world of the
pioneers of knowledge, had one of those rich and lavish natures which
no prosperity can impoverish, and which make faith in goodness easy
for others. I have often thought that those who never knew the grand
old Adam Sedgwick and the then young and ever youthful Clerk Maxwell,
had yet to learn the largeness and fulness of the moulds in which
some choice natures are framed. Of the scientific greatness of our
friend we were most of us unable to judge; but any one could see and
admire the boy-like glee, the joyous invention, the wide reading, the
eager thirst for truth, the subtle thought, the perfect temper, the
unfailing reverence, the singular absence of any taint of the breath of
worldliness in any of its thousand forms.</p>

<p>Brethren, you may know such men now among your college friends, though
there can be but few in any year, or indeed in any century, that
possess the rare genius of the man whom we deplore. If it be so, then,
if you will accept the counsel of a stranger, thank God for His gift.
Believe me when I tell you that a few such blessings will come to you
in later life. There are blessings that come once in a lifetime. One of
these is the reverence with which we look up to greatness and goodness
in a college friend—above us, beyond us, far out of our mental or
moral grasp, but still one of us, near to us, our own. You know in
part, at least, how in this case the promise of youth was more than
fulfilled, and how the man who, but a fortnight ago, was the ornament
of the University, and—shall I be wrong in saying it?—almost the
discoverer of a new world of knowledge, was even more loved than he
was admired, retaining after twenty years of fame that mirth, that
simplicity, that childlike delight in all that is fresh and wonderful,
which we rejoice to think of as some of the surest accompaniment of
true scientific genius.</p>

<p>You know, also, that he was a devout as well as thoughtful Christian. I
do not note this in the triumphant spirit of a controversialist. I will
not for a moment assume<span class="pagenum" id="Page_424">[Pg 424]</span> that there is any natural opposition between
scientific genius and simple Christian faith. I will not compare him
with others who have had the genius without the faith. Christianity,
though she thankfully welcomes and deeply prizes them, does not need
now, any more than when St. Paul first preached the Cross at Corinth,
the speculations of the subtle or the wisdom of the wise. If I wished
to show men, especially young men, the living force of the Gospel, I
would take them not so much to a learned and devout Christian man,
to whom all stores of knowledge were familiar, but to some, country
village, where for fifty years there had been devout traditions and
devout practice. There they would see the gospel lived out; truths,
which other men spoke of, seen and known; a spirit not of this world
visibly, hourly present; citizenship in heaven daily assumed, and daily
realised. Such characters I believe to be the most convincing preachers
to those who ask whether Revelation is a fable, and God. an unknowable.
Yes, in most cases,—not, I admit in all,—simple faith, even
peradventure more than devout genius, is mighty for removing doubts
and implanting fresh conviction. But having said this, we may well
give thanks to God that our friend was what he was, a firm Christian
believer, and that his powerful mind, after ranging at will through the
illimitable spaces of Creation, and almost handling what he called “the
foundation stones of the material universe,” found its true rest and
happiness in the love and the mercy of Him whom the humblest Christian
calls his Father. Of such a man it may be truly said that he had his
citizenship in heaven, and that he looked for, as a Saviour, the Lord
Jesus Christ, through whom the unnumbered worlds were made, and in the
likeness of whose image our new and spiritual body will be fashioned.</p>
</div>

<p>There was a preliminary funeral ceremony in Trinity College Chapel,
where the first part of the Burial Service was read, in the presence
of all the leading members of the University. The body was<span class="pagenum" id="Page_425">[Pg 425]</span> then taken
home to Glenlair, and buried in Parton Churchyard, the funeral being
attended by numbers of his countrymen from far and near.</p>


<p class="space-above2">In these reminiscences I have purposely abstained as much as possible
from comment. But in concluding this portion of the present work, I may
be permitted to record a very few general observations or impressions.</p>

<p>The leading note of Maxwell's character is a grand simplicity. But in
attempting to analyse it we find a complex of qualities which exist
separately in smaller men. Extraordinary gentleness is combined with
keen penetration, wonderful activity with a no less wonderful repose,
personal humility and modesty with intellectual scorn. His deep
reserve in common intercourse was commensurate with the fulness of his
occasional outpourings to those he loved. His tenderness for all living
things was deep and instinctive; from earliest childhood he could not
hurt a fly. Not less instinctive was the sense of equality amongst all
human beings, which underlay the plainness of his address. But, on the
other hand, his respect for the actual order of the world and for the
wisdom of the past, was at least as steadfast as his faith in progress.
While fearless in speculation, he was strongly conservative in practice.</p>

<p>In his intellectual faculties there was also a balance of powers which
are often opposed. His imagination was in the highest sense concrete,
grasping the actual reality, and not only the relations<span class="pagenum" id="Page_426">[Pg 426]</span> of things. No
one was ever more impatient of mere abstractions.<a id="FNanchor_239" href="#Footnote_239" class="fnanchor">[239]</a> Yet few have had
so firm a hold upon ideas. Once more, while he was continually striving
to reduce to greater definiteness men's conceptions of leading physical
laws, he seemed habitually to live in a sort of mystical communion with
the infinite.</p>

<p>His aunt, Mrs. Wedderbum, who had the care of him during so much of
his early life, said on the occasion of his marriage, “James has lived
hitherto at the gate of heaven.”</p>

<p>Mr. Colin Mackenzie has repeated to me two sayings of his during those
last days, which may be repeated here—“Old chap, I have read up many
queer religions: there is nothing like the old thing after all;”
and—“I have looked into most philosophical systems, and I have seen
that none will work without a God.”</p>

<p>Maxwell's humour, which with many passed for mere eccentricity, and to
some was the characteristic by which he was chiefly known, at least in
earlier life, may be passed over lightly here. With strangers it was
sometimes the veil of a sensitiveness which but for this would have
made him the victim of his immediate surroundings. In confidential
intercourse it was a perpetual fund of delight, the vehicle of his
exuberant fancy, as it glanced in all directions from the immediate
topic of discourse.</p>

<p>It was his way of acknowledging “the grotesque view ”<a id="FNanchor_240" href="#Footnote_240" class="fnanchor">[240]</a> of
everything. Like other humourists whom<span class="pagenum" id="Page_427">[Pg 427]</span> I have known, he was never
tired of a joke which had once tickled him; only, if retained in
employment, it must always be tricked out with some new livery, and
have some fresh turn given to it. As late as the summer of 1879,
in writing to Professor Baynes about an article on Chemistry for
the <i>Encyclopœdia Britannica</i>, he repeated in some new way the
well-worn jest about “an Analyser or a Charlatan.” Even on his deathbed
at Cambridge, in familiar converse with his cousin and friend, Mr.
Colin Mackenzie, he still used the old quaint familiar speech:—“No,
not that phial! the little red-headed chap!”</p>

<p>Nor is it necessary to dwell on the rare freshness of feeling which
he carried into middle life. The reader of his correspondence at any
period must feel involuntarily that he had “the dew of his youth.”</p>

<p>In thinking of him in college days, I used often to associate him in
my own mind with Socrates. There is one point in the resemblance which
I had not then realised, the “Socratic strength” of Antisthenes—his
extraordinary power of moral and physical endurance.—Once at
Cambridge, when his wife was lying ill in her room, and a terrier,
who had already shown “a wild trick of his ancestors,” was watching
beside the bed, Maxwell happened to go in for the purpose of moving
her. The dog sprang at him and fastened on his nose. In order not to
disturb Mrs. Maxwell, he went out quietly, holding his arm beneath the
creature, which was still hanging to his face.</p>

<p>What had struck me, I suppose, in making the above comparison, was
the eager spirit of inquiry<span class="pagenum" id="Page_428">[Pg 428]</span> beneath the ironical shell. I might have
added the union of speculation with mysticism, and of conservatism
with progressive thought. But in one essential point, the dialectical
cross-questioning method, the analogy fails. For Maxwell had not spent
his youth in the Athenian agora, but in the solitudes of Galloway,
where he had interrogated Nature more than Man.</p>

<p>In his conversation he might rather be compared with the earlier Greek
thinkers, “who,” says Plato, (Soph. 243 B) “went on their several ways,
without caring whether they took us with them, or left us behind.” The
necessity of utterance was often stronger with him than the endeavour
to make himself understood, and he would pour out his ideas in simple
affectionateness to those who could not follow them. His thoughts were
often tentative, but his expression of them was always dogmatic, even
in the negative formula “No one knows what is meant by” so and so.</p>

<p>His indirect, allusive way of speaking was not, however, wilfully
assumed, but was the result of idiosyncrasy and early habit; and it
disappeared utterly in the presence of any great occasion—a great
joy, a great sorrow, or a great duty. Then his speech resolved itself
into statements of fact, brief and unemotional, but absolutely simple
and direct. And, latterly at all events, such were generally the
characteristics of his style in writing. I have been told by Mr.
Huddlestone, a late Fellow of King’s College, Cambridge, that when
consulted about a lightning<span class="pagenum" id="Page_429">[Pg 429]</span> conductor for King's College Chapel (a
building which he greatly loved) Maxwell called and made a verbal
explanation which was unintelligible, but in going away he fortunately
left a written statement, and this was perfectly clear.</p>

<p>The Galloway boy was in many ways the father of the Cambridge man; and
even the “ploys” of his childhood contained a germ of his life-work.
Indeed, it may be said that with him, despite the popular adage, “Work
when you work,” etc., play was always passing into work and work into
play. In twirling his magic discs, his mind was already busied about
the cause of optical phenomena. He plied the devil-on-two-sticks with
the same eager industry, and with the same simple enjoyment, with
which he afterwards spun his dynamical top. And amidst his profoundest
investigations, whether about the Rings of Saturn or the Lines of
Force, or the molecular structure of material things, the playful
spirit of his boyhood was ever ready to break forth. Meanwhile, alike
beneath the grave and sparkling mood, a spirit of deep piety pervaded
all he did, whether in the most private relations of life, or in
his position as an appointed teacher and investigator, or in his
philosophic contemplation of the universe. There is no attribute from
which the thought of him is more inseparable.</p>

<p>He had keen sympathy with ideal aspirations, together with an
occasional sense of their fruitlessness. “It’s no use thinking of the
chap ye might have been.” When, in their early married life, Mrs.
Maxwell was oppressed with a sense of failure in her<span class="pagenum" id="Page_430">[Pg 430]</span> first attempts at
Cottage-visiting, he made her sit down while he read to her Milton’s
sonnet ending with the line, “They also serve, who only stand and wait.”</p>

<p>He appears in early days to have been conscious of some superficial
weaknesses, of a certain excitability of temperament, leading to
“preconscious states” and preventing him from at once setting himself
right in new surroundings; also of the equal danger of shrinking into
himself, and “mystifying” those about him. This difficulty, and many
others “within and without,” he overcame. But it would be too much to
say of him that “his affections never swayed more than his reason,”
or that he obtained as firm a foothold in practical life as he had by
birthright in the region of scientific thought. This great mass of mind
was so delicately hung as to be guided sometimes by a silken thread.
Few men, if any, would venture to argue or remonstrate with Maxwell
when he had decided on a course of action in the council-chamber
of his own breast. But he could not consciously hurt any creature,
nor permit the possibility of causing pain to those he loved. Nor
was his power over others always adequate to the keenness of his
perceptions. For while his penetration often reached the secrets of
the heart, his. generosity sometimes overlooked the most obvious
characteristics—especially in the shape of mean or vulgar motives.</p>

<p>His liberality, in every sense of the word, was absolute. People have
been disposed to criticise the plainness of his entertainments, without
knowing<span class="pagenum" id="Page_431">[Pg 431]</span> that while this was a matter of taste, the difference between
the plain and the luxurious table was uniformly dispensed in charity.
He has also been supposed by some who think that science should disown
religion, to have been intolerant as well as orthodox. The contrary
was true. And in particular, the mutual admiration and regard for
one another of two such men as Maxwell and Clifford, notwithstanding
their profound divergence of opinion on subjects of human interest,
deserves to be quoted as an honourable exception to the narrow
exclusiveness which has been too prevalent alike in the Christian and
the anti-Christian world.<a id="FNanchor_241" href="#Footnote_241" class="fnanchor">[241]</a></p>

<p>He never sought for fame, but with sacred devotion continued in mature
life the labours which had been his spontaneous delight in boyhood.
Yet, considering the high region in which he worked, he received a
large measure of recognition even in his lifetime. The Rumford Medal,
conferred in 1860, was the first of a long list of honours, which up to
his last year continued to accumulate from all parts of the civilised
world.<a id="FNanchor_242" href="#Footnote_242" class="fnanchor">[242]</a> And some of those who had an eye<span class="pagenum" id="Page_432">[Pg 432]</span> for genius, though their
intellectual interests lay in different spheres from his, could not
forbear their testimony. Out of many such expressions it is enough to
have selected one. Mr. Frederick Pollock in his work on Spinoza, having
occasion to refer to Maxwell’s views on matter and space, adds the
following note (p. 115):—</p>

<div class="blockquot">

<p>Clerk Maxwell was living when these lines were written: I cannot let
them pass through the press without adding a word of tribute to a man
of profound and original genius, too early lost to England and to
Science.</p>
</div>

<p>Great as was the range and depth of Maxwell’s powers, that which is
still more remarkable is the unity of his nature and of his life. This
unity came not from circumstance, for there were breaks in his outward
career, but from the native strength of the spirit that was in him. In
the eyes of those who knew him best, the whole man gained in beauty
year by year. As son, friend, lover, husband; in science, in society,
in religion; whether buried in retirement or immersed in business—he
is absolutely single-hearted. This is true of his mental as well as of
his emotional being, for indeed they were inseparably blended. And the
fixity of his devotion both to persons and<span class="pagenum" id="Page_433">[Pg 433]</span> ideas was compatible with
all but universal sympathies and the most fearless openness of thought.
There are no “water-tight compartments,”<a id="FNanchor_243" href="#Footnote_243" class="fnanchor">[243]</a> there is no “tabooed
ground;”<a id="FNanchor_244" href="#Footnote_244" class="fnanchor">[244]</a> in spite of much natural reserve, he never really
lost his predilection for “a thorough draft.”<a id="FNanchor_245" href="#Footnote_245" class="fnanchor">[245]</a> That marvellous
interpenetration of scientific industry, philosophic insight, poetic
feeling and imagination, and overflowing humour, was closely related to
the profound <i>sincerity</i> which, after all is said, is the truest
sign alike of his genius and of his inmost nature, and is most apt to
make his life instructive beyond the limits of the scientific world.
He would not wish to be set up as an authority on subjects (such as
historical criticism) which, however interesting to him, he had not
had leisure to study exhaustively. But our age has much to learn from
his example. And in his life, regarded as a whole, there is a depth of
goodness which can be but faintly indicated in his biography.</p>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_235" href="#FNanchor_235" class="label">[235]</a> 
<span class="allsmcap">AARON.</span></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Holiness on the head,</div>
    <div class="verse indent2">Light and perfections on the breast,</div>
    <div class="verse indent0">Harmonious bells below, raising the dead</div>
    <div class="verse indent2">To lead them unto life and rest:</div>
    <div class="verse indent2">Thus are true Aarons drest.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Profaneness in my head,</div>
    <div class="verse indent2">Defects and darkness in my breast,</div>
    <div class="verse indent0">A noise of passions ringing me for dead</div>
    <div class="verse indent2">Unto a place where is no rest:</div>
    <div class="verse indent2">Poor priest, thus am I drest.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Only another head</div>
    <div class="verse indent2">I have, another heart and breast,</div>
    <div class="verse indent0">Another music, making live, not dead,</div>
    <div class="verse indent2">Without whom I could have no rest:</div>
    <div class="verse indent2">In Him I am well drest.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Christ is my only head,</div>
    <div class="verse indent2">My alone only heart and breast,</div>
    <div class="verse indent0">My only music, striking me e’en dead;</div>
    <div class="verse indent2">That to the old man I may rest,</div>
    <div class="verse indent2">And be in him new drest.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">So holy in my head,</div>
    <div class="verse indent2">Perfect and light in my dear breast,</div>
    <div class="verse indent0">My doctrine tuned by Christ (who is not dead,</div>
    <div class="verse indent2">But lives in me while I do rest),</div>
    <div class="verse indent2">Come, people; Aaron’s drest.</div>
  </div>
</div>
</div>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_236" href="#FNanchor_236" class="label">[236]</a> 
Dr. J. W. Lorraine of Castle-Douglas, in a letter
addressed to Dr. Paget, and dated 5th October 1879, remarks as follows
concerning his patient:—“I must say he is one of the best men I have
ever met, and a greater merit than his scientific attainments is his
being, so far as human judgment can discern, a most perfect example of
a Christian gentleman.” This remark, Dr. Paget observes, “is a very
unusual one in a letter from one physician to another.” Dr. Paget
also says in writing to Mr. Garnett: “There is a deep interest in the
fact of <i>how</i> such a man as Maxwell met the trials of sickness,
and the approach of death. They are severe tests of amiability and
unselfishness, and of the genuineness of religious convictions. It is
something to say of a man that his unselfishness and composure remained
undisturbed, and it is interesting physiologically and psychologically,
that in the very extremity of bodily weakness, when the nourishment
of the brain must have become so reduced, the mind remained perfectly
clear” Dr. Lorraine’s remark on Maxwell’s personal character expresses
the feelings of all, nurses included, that were about Maxwell in his
last illness.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_237" href="#FNanchor_237" class="label">[237]</a> 
Thuc. 7, 15.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_238" href="#FNanchor_238" class="label">[238]</a> 
Ibid.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_239" href="#FNanchor_239" class="label">[239]</a> 
He was particularly indignant at the confusion by some
would-be philosophers of facts with laws.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_240" href="#FNanchor_240" class="label">[240]</a> 
<a href="#Page_262">P. 262.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_241" href="#FNanchor_241" class="label">[241]</a> 
About the year 1860 I remember discussing with him J.
Macleod Campbell’s book on the Atonement, which had lately appeared.
He made some criticisms, which I have forgotten, but I remember the
emphatic tone in which he said, “We want light.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_242" href="#FNanchor_242" class="label">[242]</a> 
In 1870 Maxwell received the honorary degree of LL.D.
in the University of Edinburgh; on 11th November 1874 he was elected
Foreign Honorary Member of the American Academy of Arts and Sciences
of Boston; on 15th October 1875, Member of the American Philosophical
Society of Philadelphia; on 4th December 1875, Corresponding Member
of the Royal Society of Sciences of Göttingen; on 21st June 1876 he
received the honorary degree of D.C.L. at Oxford; on 5th December
1876 he was elected Honorary Member of the New York Academy of
Science; on 27th April 1877, Member of the Royal Academy of Science of
Amsterdam; on 18th August 1877, Foreign Corresponding Member in the
Mathematico-Natural-Science Class of the Imperial Academy of Sciences
of Vienna; and in the spring of 1878 he received the Volta Medal and
degree of Doctor of Physical Science <i>honoris causâ</i> in the
University of Pavia.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_243" href="#FNanchor_243" class="label">[243]</a> 
<a href="#Page_205">P. 205.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_244" href="#FNanchor_244" class="label">[244]</a> 
<a href="#Page_179">P. 179.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_245" href="#FNanchor_245" class="label">[245]</a> 
See the Occasional Poem on St. David’s Day.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_434">[Pg 434]</span></p>

<h2 class="nobreak" id="CHAPTER_XIV">CHAPTER XIV.<br>
<span class="allsmcap">LAST ESSAYS AT CAMBRIDGE.</span></h2>
</div>

<p class="nind">
AFTER Maxwell's return to Cambridge in 1871, several of
those who had been “Apostles” together in 1853-7, revived the habit
of meeting together for the discussion of speculative questions. This
club of elder men (άνδρών πρεσβυτέρων έταιρία), which included such
men as Dr. Lightfoot, now Bishop of Durham, and Professors Hort and
Westcott, was christened Erănus (see p. 366), and three of Maxwell's
contributions, dated by himself, have been preserved. It seems
advisable to print these entire,—although not even chips from his
workshop, but rather sparks from the whetstone of his mind,—since what
he thought worthy of detaining the attention of such listeners in those
ripe years cannot fail to be of interest to many readers.</p>

<div class="blockquot">

<p class="nindc space-above2">I.</p>

<p class="hanging2">
<i>Does the progress of Physical Science tend to give any advantage to
the opinion of Necessity (or Determinism) over that of the Contingency
of Events and the Freedom of the Will?</i></p>

<div class="sidenote"><i>Æt.</i> 41.</div>

<p class="right"><i>11th February 1873.</i></p>

<p>The general character and tendency of human thought is a topic the
interest of which is not confined to professional philosophers.
Though every one of us must, each for himself,<span class="pagenum" id="Page_435">[Pg 435]</span> accept some sort of a
philosophy, good or had, and though the whole virtue of this philosophy
depends on it being our own, yet none of us thinks it out entirely for
himself. It is essential to our comfort that we should know whether
we are going with the general stream of human thought or against it,
and if it should turn out that the general stream flows in a direction
different from the current of our private thought, though we may
endeavour to explain it as the result of a widespread aberration of
intellect, we would be more satisfied if we could obtain some evidence
that it is not ourselves who are going astray.</p>

<p>In such an enquiry we need some fiducial point or standard of
reference, by which we may ascertain the direction in which we are
drifting. The books written by men of former ages who thought about the
same questions would be of great use, if it were not that we are apt to
derive a wrong impression from them if we approach them by a course of
reading unknown to those for whom they were written.</p>

<p>There are certain questions, however, which form the <i>pièces de
resistance</i> of philosophy, on which men of all ages have exhausted
their arguments, and which are perfectly certain to furnish matter of
debate to generations to come, and which may therefore serve to show
how we are drifting. At a certain epoch of our adolescence those of us
who are good for anything begin to get anxious about these questions,
and unless the cares of this world utterly choke our metaphysical
anxieties, we become developed into advocates of necessity or of
free-will. What it is which determines for us which side we shall
take must for the purpose of this essay be regarded as contingent.
According to Mr. F. Galton, it is derived from structureless elements
in our parents, which were probably never developed in their earthly
existence, and which may have been handed down to them, still in the
latent state, through untold generations. Much might be said in favour
of such a congenital bias towards a particular scheme of philosophy; at
the same time we must acknowledge that much of a man's mental history
depends upon events occurring after his birth in time, and that he is
on the whole more<span class="pagenum" id="Page_436">[Pg 436]</span> likely to espouse doctrines which, harmonise with
the particular set of ideas to which he is induced, by the process of
education, to confine his attention. What will be the probable effect
if these ideas happen mainly to be those of modern physical science?</p>

<p>The intimate connexion between physical and metaphysical science is
indicated even by their names. What are the chief requisites of a
physical laboratory? Facilities for measuring space, time, and mass.
What is the occupation of a metaphysician? Speculating on the modes of
difference of co-existent things, on invariable sequences, and on the
existence of matter.</p>

<p>He is nothing but a physicist disarmed of all his weapons,—a
disembodied spirit trying to measure distances in terms of his own
cubit, to form a chronology in which intervals of time are measured by
the number of thoughts which they include, and to evolve a standard
pound out of his own self-consciousness. Taking metaphysicians singly,
we find again that as is their physics, so is their metaphysics.
Descartes, with his perfect insight into geometrical truth, and his
wonderful ingenuity in the imagination of mechanical contrivances,
was far behind the other great men of his time with respect to the
conception of matter as a receptacle of momentum and energy. His
doctrine of the collision of bodies is ludicrously absurd. He admits,
indeed, that the facts are against him, but explains them as the result
either of the want of perfect hardness in the bodies, or of the action
of the surrounding air. His inability to form that notion which we now
call force is exemplified in his explanation of the hardness of bodies
as the result of the quiescence of their parts.</p>

<p>“Neque profecto ullum glutinum possumus excogitare, quod particulas
durorum corporum firmius inter se conjungat, quàm ipsarum quies.”
<i>Princip.</i>, <i>Pars</i> II. LV.</p>

<p>Descartes, in fact, was a firm believer that matter has but one
essential property, namely extension, and his influence in preserving
this pernicious heresy in existence extends even to very recent times.
Spinoza’s idea of matter,<span class="pagenum" id="Page_437">[Pg 437]</span> as he receives it from the authorities, is
exactly that of Descartes; and if he has added to it another essential
function, namely thought, the new ingredient does not interfere with
the old, and certainly does not bring the matter of Descartes into
closer resemblance with that of Newton.</p>

<p>The influence of the physical ideas of Newton on philosophical thought
deserves a careful study. It may be traced in a very direct way through
Maclaurin and the Stewarts to the Scotch School, the members of which
had all listened to the popular expositions of the Newtonian Philosophy
in their respective colleges. In England, Boyle and Locke reflect
Newtonian ideas with tolerable distinctness, though both have ideas of
their own. Berkeley, on the other hand, though he is a master of the
language of his time, is quite impervious to its ideas. Samuel Clarke
is perhaps one of the best examples of the influence of Newton; while
Roger Cotes, in spite of his clever exposition of Newton’s doctrines,
must be condemned as one of the earliest heretics bred in the bosom of
Newtonianism.</p>

<p>It is absolutely manifest from these and other instances that any
development of physical science is likely to produce some modification
of the methods and ideas of philosophers, provided that the physical
ideas are expounded in such a way that the philosophers can understand
them.</p>

<p>The principal developments of physical ideas in modern times have been—</p>

<p>1st. The idea of matter as the receptacle of momentum and energy. This
we may attribute to Galileo and some of his contemporaries. This idea
is fully expressed by Newton, under the form of Laws of Motion.</p>

<p>2d. The discussion of the relation between the fact of gravitation and
the maxim that matter cannot act where it is not.</p>

<p>3d. The discoveries in Physical Optics, at the beginning of this
century. These have produced much less effect outside the scientific
world than might be expected. There are two reasons for this. In the
first place it is difficult, especially in these days of the separation
of technical from popular<span class="pagenum" id="Page_438">[Pg 438]</span> knowledge, to expound physical optics to
persons not professedly mathematicians. The second reason is, that it
is extremely easy to show such persons the phenomena, which are very
beautiful in themselves, and this is often accepted as instruction in
physical optics.</p>

<p>4th. The development of the doctrine of the Conservation of Energy.
This has produced a far greater effect on the thinking world outside
that of technical thermodynamics.</p>

<p>As the doctrine of the conservation of matter gave a definiteness to
statements regarding the immateriality of the soul, so the doctrine of
the conservation of energy, when applied to living beings, leads to the
conclusion that the soul of an animal is not, like the mainspring of a
watch, the motive power of the body, but that its function is rather
that of a steersman of a vessel,—not to produce, but to regulate and
direct the animal powers.</p>

<p>5th. The discoveries in Electricity and Magnetism labour under the same
disadvantages as those in Light. It is difficult to present the ideas
in an adequate manner to laymen, and it is easy to show them wonderful
experiments.</p>

<p>6th. On the other hand, recent developments of Molecular Science seem
likely to have a powerful effect on the world of thought. The doctrine
that visible bodies apparently at rest are made up of parts, each of
which is moving with the velocity of a cannon ball, and yet never
departing to a visible extent from its mean place, is sufficiently
startling to attract the attention of an unprofessional man.</p>

<p>But I think the most important effect of molecular science on our way
of thinking will be that it forces on our attention the distinction
between two kinds of knowledge, which we may call for convenience the
Dynamical and Statistical.</p>

<p>The statistical method of investigating social questions has Laplace
for its most scientific and Buckle for its most popular expounder.
Persons are grouped according to some characteristic, and the number
of persons forming the group is set down under that characteristic.
This is the raw material from which the statist endeavours to deduce
general<span class="pagenum" id="Page_439">[Pg 439]</span> theorems in sociology. Other students of human nature proceed
on a different plan. They observe individual men, ascertain their
history, analyse their motives, and compare their expectation of
what they will do with their actual conduct. This may be called the
dynamical method of study as applied to man. However imperfect the
dynamical study of man may be in practice, it evidently is the only
perfect method in principle, and its shortcomings arise from the
limitation of our powers rather than from a faulty method of procedure.
If we betake ourselves to the statistical method, we do so confessing
that we are unable to follow the details of each individual case, and
expecting that the effects of widespread causes, though very different
in each individual, will produce an average result on the whole nation,
from a study of which we may estimate the character and propensities of
an imaginary being called the Mean Man.</p>

<p>How, if the molecular theory of the constitution of bodies is true,
all our knowledge of matter is of the statistical kind. A constituent
molecule of a body has properties very different from those of the
body to which it belongs. Besides its immutability and other recondite
properties, it has a velocity which is different from that which we
attribute to the body as a whole.</p>

<p>The smallest portion of a body which we can discern consists of a
vast number of such molecules, and all that we can learn about this
group of molecules is statistical information. We can determine the
motion of the centre of gravity of the group, but not that of any one
of its members for the time being, and these members themselves are
continually passing from one group to another in a manner confessedly
beyond our power of tracing them.</p>

<p>Hence those uniformities which we observe in our experiments with
quantities of matter containing millions of millions of molecules
are uniformities of the same kind as those explained by Laplace and
wondered at by Buckle, arising from the slumping together of multitudes
of cases, each of which is by no means uniform with the others.</p>

<p>The discussion of statistical matter is within the province<span class="pagenum" id="Page_440">[Pg 440]</span> of human
reason, and valid consequences may be deduced from it by legitimate
methods; but there are certain peculiarities in the very form of the
results which indicate that they belong to a different department of
knowledge from the domain of exact science. They are not symmetrical
functions of the time. It makes all the difference in the world whether
we suppose the inquiry to be historical or prophetical—whether our
object is to deduce the past state or the future state of things from
the known present state. In astronomy, the two problems differ only in
the sign of \(t\), the time; in the theory of the diffusion of matter,
heat, or motion, the prophetical problem is always capable of solution;
but the historical one, except in singular cases, is insoluble. There
may be other cases in which the past, but not the future, may be
deducible from the present. Perhaps the process by which we remember
past events, by submitting our memory to analysis, may be a case of
this kind.</p>

<p>Much light may be thrown on some of these questions by the
consideration of stability and instability. \(\angle\) When the state
of things is such that an infinitely small variation of the present
state will alter only by an infinitely small quantity the state at
some future time, the condition of the system, whether at rest or in
motion, is said to be stable; but when an infinitely small variation in
the present state may bring about a finite difference in the state of
the system in a finite time, the condition of the system is said to be
unstable.</p>

<p>It is manifest that the existence of unstable conditions renders
impossible the prediction of future events, if our knowledge of the
present state is only approximate, and not accurate.</p>

<p>It has been well pointed out by Professor Balfour Stewart that physical
stability is the characteristic of those systems from the contemplation
of which determinists draw their arguments, and physical stability that
of those living bodies, and moral instability that of those developable
souls, which furnish to consciousness the conviction of free will.</p>

<p>Having thus pointed out some of the relations of physical<span class="pagenum" id="Page_441">[Pg 441]</span> science to
the question, we are the better prepared to inquire what is meant by
determination and what by free will.</p>

<p>No one, I suppose, would assign to free will a more than infinitesimal
range. No leopard can change his spots, nor can any one by merely
wishing it, or, as some say, <i>willing</i> it, introduce discontinuity
into his course of existence. Our free will at the best is like that of
Lucretius’s atoms,—which at quite uncertain times and places deviate
in an uncertain manner from their course. In the course of this our
mortal life we more or less frequently find ourselves on a physical
or moral watershed, where an imperceptible deviation is sufficient to
determine into which of two valleys we shall descend. The doctrine
of free will asserts that in some such cases the Ego alone is the
determining cause. The doctrine of Determinism asserts that in every
case, without exception, the result is determined by the previous
conditions of the subject, whether bodily or mental, and that Ego
is mistaken in supposing himself in any way the cause of the actual
result, as both what he is pleased to call decisions and the resultant
action are corresponding events due to the same fixed laws. Now, when
we speak of causes and effects, we always imply some person who knows
the causes and deduces the effects. Who is this person? Is he a man, or
is he the Deity?</p>

<p>If he is man,—that is to say, a person who can make observations with
a certain finite degree of accuracy,—we have seen that it is only
in certain cases that he can predict results with even approximate
correctness.</p>

<p>If he is the Deity, I object to any argument founded on a supposed
acquaintance with the conditions of Divine foreknowledge.</p>


<p class="space-above2">
The subject of the essay is the relation to determinism, not of
theology, metaphysics, or mathematics, but of physical science,—the
science which depends for its material on the observation and
measurement of visible things, but which aims at the development of
doctrines whose consistency with each other shall be apparent to our
reason.</p>

<p><span class="pagenum" id="Page_442">[Pg 442]</span></p>

<p>It is a metaphysical doctrine that from the same antecedents follow the
same consequents. No one can gainsay this. But it is not of much use in
a world like this, in which the same antecedents never again concur,
and nothing ever happens twice. Indeed, for aught we know, one of the
antecedents might be the precise date and place of the event, in which
case experience would go for nothing. The metaphysical axiom would be
of use only to a being possessed of the knowledge of contingent events,
<i>scientia simplicis intelligentiœ</i>,—a degree of knowledge to
which mere omniscience of all facts, <i>scientia visionis</i>, is but
ignorance.</p>

<p>The physical axiom which has a somewhat similar aspect is “That from
like antecedents follow like consequents.” But here we have passed
from sameness to likeness, from absolute accuracy to a more or less
rough approximation. There are certain classes of phenomena, as I have
said, in which a small error in the data only introduces a small error
in the result. Such are, among others, the larger phenomena of the
Solar System, and those in which the more elementary laws in Dynamics
contribute the greater part of the result. The course of events in
these cases is stable.</p>

<p>There are other classes of phenomena which are more complicated, and
in which cases of instability may occur, the number of such cases
increasing, in an exceedingly rapid manner, as the number of variables
increases. Thus, to take a case from a branch of science which comes
next to astronomy itself as a manifestation of order: In the refraction
of light, the direction of the refracted ray depends on that of the
incident ray, so that in general, if the one direction be slightly
altered, the other also will be slightly altered. In doubly refracting
media there are two refracting rays, but it is true of each of them
that like causes produce like effects. But if the direction of the ray
within a biaxial crystal is nearly but not exactly coincident with
that of the ray-axis of the crystal, a small change in direction will
produce a great change in the direction of the emergent ray. Of course,
this arises from a singularity in the properties of the ray-axis, and
there are only two ray-axes among the infinite number of<span class="pagenum" id="Page_443">[Pg 443]</span> possible
directions of lines in the crystal; but it is to be expected that in
phenomena of higher complexity there will be a far greater number of
singularities, near which the axiom about like causes producing like
effects ceases to be true. Thus the conditions under which gun-cotton
explodes are far from being well known; but the aim of chemists is
not so much to predict the time at which gun-cotton will go off of
itself, as to find a kind of gun-cotton which, when placed in certain
circumstances, has never yet exploded, and this even when slight
irregularities both in the manufacture and in the storage are taken
account of by trying numerous and long continued experiments.</p>

<p>In all such cases there is one common circumstance,—the system has a
quantity of potential energy, which is capable of being transformed
into motion, but which cannot begin to be so transformed till the
system has reached a certain configuration, to attain which requires
an expenditure of work, which in certain cases may be infinitesimally
small, and in general bears no definite proportion to the energy
developed in consequence thereof. For example, the rock loosed by frost
and balanced on a singular point of the mountain-side, the little spark
which kindles the great forest, the little word which sets the world a
fighting, the little scruple which prevents a man from doing his will,
the little spore which blights all the potatoes, the little gemmule
which makes us philosophers or idiots. Every existence above a certain
rank has its singular points: the higher the rank, the more of them. At
these points, influences whose physical magnitude is too small to be
taken account of by a finite being, may produce results of the greatest
importance. All great results produced by human endeavour depend on
taking advantage of these singular states when they occur.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">There is a tide in the affairs of men</div>
    <div class="verse indent0">Which, taken at the flood, leads on to fortune.</div>
  </div>
</div>
</div>

<p class="nind">
The man of tact says “the right word at the right time,” and, “a word
spoken in due season how good is it!” The man of no tact is like
vinegar upon nitre when<span class="pagenum" id="Page_444">[Pg 444]</span> he sings his songs to a heavy heart. The
ill-timed admonition hardens the heart, and the good resolution, taken
when it is sure to be broken, becomes macadamised into pavement for the
abyss.</p>

<p>It appears then that in our own nature there are more singular
points,—where prediction, except from absolutely perfect data, and
guided by the omniscience of contingency, becomes impossible,—than
there are in any lower organisation. But singular points are by
their very nature isolated, and form no appreciable fraction of the
continuous course of our existence. Hence predictions of human conduct
may be made in many cases. First, with respect to those who have no
character at all, especially when considered in crowds, after the
statistical method. Second, with respect to individuals of confirmed
character, with respect to actions of the kind for which their
character is confirmed.</p>

<p>If, therefore, those cultivators of physical science from whom the
intelligent public deduce their conception of the physicist, and
whose style is recognised as marking with a scientific stamp the
doctrines they promulgate, are led in pursuit of the arcana of science
to the study of the singularities and instabilities, rather than the
continuities and stabilities of things, the promotion of natural
knowledge may tend to remove that prejudice in favour of determinism
which seems to arise from assuming that the physical science of the
future is a mere magnified image of that of the past.</p>


<p class="nindc space-above2">II.</p>

<p class="nindc"><span class="allsmcap">On Modified Aspects of Pain.</span></p>

<p class="right"><i>31st October 1876.</i></p>

<div class="sidenote"><i>Æt.</i> 45.</div>

<p>We often make sensation in general the subject of discussion, but it
does not appear that we think much about particular sensations. If we
did, we should have had more names for them. Most of the words which
seem at first sight to be names of sensations are really used as names
of objects which we suppose to be associated with the sensation, and to
be indicated by it. All such words as hot and<span class="pagenum" id="Page_445">[Pg 445]</span> cold, flat and sharp,
green, bright, bitter, frouzy, and so on, though they may sometimes
excite in a very sympathetic mind a faint image of some actual
sensation, call up much more vividly the idea of some external object
or phenomenon. Language, in fact, has become far more an instrument
for conveying information and for recording facts than for awakening
sympathy; and even thought, in articulately speaking men, is occupied
rather in methodising our perceptions than in chewing the cud of our
sensations.</p>

<p>Of the few words which we have left to distinguish states of feeling,
most of the better sort, such as pleasure, joy, happiness, are
remarkably vague, so that the only available part of the vocabulary of
sensations consists of the names of pains.</p>

<p>Such words as toothache, headache, heartache, certainly fulfil the
condition of suggesting, at least to non-medical persons, a state of
feeling rather than an objective phenomenon.</p>

<p>Now, whatever we may think, each for ourselves, at the time when we
feel a pain or an ache, about consciousness or subjectivity, we are
compelled, when we have to speak about it, or even to think about it,
to view it from the outside, and to adopt the objective method of
treatment.</p>


<p class="space-above2">
A pain, then, in a sentient being other than ourselves is a condition
which that being ordinarily endeavours to put a stop to, and the
recurrence of which it tries to prevent; just as a pleasurable
sensation is one which it endeavours to prolong, and afterwards to
reproduce.</p>

<p>The psychologist has therefore to study pleasures and pains in their
effects on a sentient being, just as the naturalist studies forces in
their effects on the motion of a material system. The motion of the
material system would go on in a determinate manner though no forces
were in action. The actions of a living being, when not in a state of
conscious effort, and often, indeed, even when it supposes itself to be
exercising what it would call its will, go on in a manner determined by
habits established by long custom,<span class="pagenum" id="Page_446">[Pg 446]</span> and transmitted from generation to
generation, though varying slightly from individual to individual.</p>

<p>According to the simplest form of the Evolution theory, those
individuals, tribes, or species, which have habits unfavourable to
their success in the battle of life, die out, and help to improve the
average quality of the remainder. This good old rule, however, this
simple plan, though it might suffice for beings of great fecundity,
would involve a great waste of life among higher and less prolific
forms. Hence if any of these should come to have tastes and feelings,
and if these should happen to be such as to repel them from pernicious
courses and attract them into salutary ones, this would give them an
advantage in the struggle for existence. Of course, there would be
an equal chance that the tastes and feelings, when first developed,
would be in favour of courses leading to destruction; but the
individuals possessed by these tastes and feelings would be all the
quicker exterminated for the good—that is to say, the more vigorous
continuation—of the species.</p>

<p>The susceptibility to pleasure and pain must therefore be regarded
as permitting a certain mitigation of the first covenant of the
evolutionists, “This do and live;” the original severity of which was
all the greater since the word “this” could be interpreted only by
observing what actions were not followed by death.</p>

<p>By pursuing what we feel to be pleasant, and avoiding what we feel to
be painful, we are following a course which was probably followed by
many of our ancestors, and of which we know at least this much—that it
did not bring them to such speedy destruction as to prevent them from
leaving us as their descendants; and this is more than we can say for
any absolutely new rule of life struck out by ourselves.</p>

<p>But it must be confessed that the monitions of pleasure and pain are
not held in such high esteem by all men, as the view which we have
just taken would seem to warrant. For though here and there we may
find an isolated teacher who has inculcated the cultivation of all
forms of pleasurable sensation, and the elimination of whatever is
disagreeable,<span class="pagenum" id="Page_447">[Pg 447]</span> yet there has never been a state of society in which it
has not been reckoned more honourable</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">To scorn delights and live laborious days,</div>
  </div>
</div>
</div>

<p class="nind">than to run after pleasure and to shrink from pain.</p>

<p>And this brings me to the main point for our consideration. Why is it
that in all times and countries the endurance of pain has been looked
upon with great respect, and has been considered necessary, salutary,
honourable, or meritorious? There is no difficulty, of course, about
those cases in which a person undertakes some enterprise, good in
itself, and in pursuance of this enterprise meets with various forms
of suffering. These are only instances of the general maxim to despise
evils of a lower order when they stand in the way of some good of a
higher order.</p>

<p>The ability to endure suffering while engaged in a good work being
recognised as a species of excellence, it is only natural that this
kind of ability should become the subject of special cultivation. The
aspirant to this form of virtue, therefore, voluntarily submits himself
to suffering, not for the sake of any visible benefit to himself and
others to be obtained by enduring that particular pain, but for the
sake of discipline.</p>

<p>The aim of discipline is that he himself, and still more that others,
may have confidence that he is able to endure suffering in a good
cause, because he has already endured suffering merely to justify this
confidence.</p>

<p>Practices of this kind have in some countries been developed to an
extravagant degree, and may have given rise to various abnormal
sentiments and maxims; but in the principle of educational discipline
there is nothing but the soundest wisdom, for the only way in which an
individual can acquire confidence that he can perform a given act when
he wishes to do so is by previous practice; and when it is necessary
for the public good that there should be a body of men, of each of
whom we can be sure that he will act in a particular manner when the
occasion for it arrives, it is absolutely necessary that they should
be drilled to an exercise as like as<span class="pagenum" id="Page_448">[Pg 448]</span> possible to the action which is
expected of them. But in all this the inconvenience or suffering which
has to be endured is by no means regarded as good in itself. It is
treated as a necessary concomitant of the act to be performed, just as
muscular effort, which may sometimes arise to the intensity of a pain,
is a necessary concomitant of an athletic exercise in which we may find
pleasure.</p>

<p>Indeed the pleasurable or painful character of an elementary sensation
or thought cannot be determined without taking into account all
its surroundings. A sensation or a thought when separated from its
surroundings may be disagreeable or painful; but when it occurs as a
part of an act of perception, we may not recognize it as painful.</p>

<p>There may even be a pleasurable complex emotion into which the painful
elementary sensation enters as an essential ingredient, so that if
on any occasion the painful sensation is deficient, we feel that the
pleasurable emotion is thereby marred and rendered incomplete.</p>


<p class="space-above2">
There is another class of cases, however, in which the pain itself is
the essential element. I mean penal suffering. The aim of punishment,
when not vindictive, is to prevent the repetition of certain acts by
associating with them penal consequences.</p>

<p>The painful consequences of an act may be associated with it by the
way of natural consequence, or through the medium of some external
punishing authority, or by the determination of the actor to punish
himself.</p>

<p>When painful effects follow an act by way of natural consequence, they
are not generally called punishment, because we do not attribute to
nature any intention of punishing the particular act. But there can be
no better instances of the conditions of efficacious punishment than
those in which an act is so immediately and so certainly followed by a
painful sensation, that the sensation becomes inseparably associated
with the act, as in the case in which we touch red-hot iron. In such
cases the act is hardly ever repeated.</p>
</div>

<p><span class="pagenum" id="Page_449">[Pg 449]</span></p>

<div class="blockquot">

<p>When the connection between the act and the sensation is not so
immediate, but has to be traced through the action of a voluntary
punisher, as when an act of a boy or a dog is followed by an unpleasant
skin-sensation inflicted by the master, the efficacy of the punishment
still depends in a great degree on its promptness and certainty, for
these are the conditions under which a permanent association can be
effected between the act and the sensation.</p>


<p class="space-above2">
Let us now consider the feelings with which punishment may be regarded
by the recipient.</p>

<p>There may be beings in whom the feeling is simple—pure repugnance.
There is a beast called the Tasmanian Devil, which is said to fight
against any odds, however overpowering, as long as any of him can stick
together. There is no hope of taming or subduing such a beast by force,
and it is probable that he will soon become extinct.</p>

<p>But in the case of less indomitable beings, punishment may soon assume
a less hateful aspect.</p>

<p>For even if it is not efficacious in changing the habits, as soon as it
is recognised as a certain consequence of transgression, the execution
of the punishment may be welcomed as a relief from the expectation of
it, and the culprit may have a satisfaction in getting it over, as an
honest man has. when he pays his debts.</p>

<p>If, however, he is really cured of the habit, he may look on the
punishment as an operation by which he has not only paid in full for
his past transgression, but has been free from the danger of falling
into future transgressions.</p>

<p>Lastly, if his moral perceptions have been so far improved that he
recognises that the action for which he was punished was really bad, he
will sympathise more with the punisher than with his former self, and
will admit not only the justice of his punishment as being according to
law, but; the justice of the law according to which he was punished.</p>


<p class="space-above2">
We come next to those cases in which there is no external punisher, but
in which grief or sorrow is awakened within ourselves on account of
what we have done.</p>
</div>

<p><span class="pagenum" id="Page_450">[Pg 450]</span></p>

<div class="blockquot">

<p>Here, again, the effect may be very different according to the mode in
which the sensation of grief is applied, and the result is rendered
complicated on account of the identity between the punisher and the
punished.</p>

<p>The legitimate application of the emotion of grief is of course to the
wrong act, so as to associate the act and all that belongs to it with
this painful emotion, and so diminish the tendency to repeat the act.</p>

<p>But the association may not be strong enough, or the emotion of grief
may altogether miss its mark, and may concentrate attention on itself,
and so become transformed into self-pity,—a very complex emotion,
in which the sweet is so mingled with the bitter, that its ultimate
effect on our conduct becomes very uncertain; the most probable
result, however, being that on future occasions what should have been
contrition passes still more easily into self-pity, and the whole
performance assumes the character of a graceful play of feelings which
we enjoy rather than suffer.</p>

<p>But though such perversions of feeling may occur, there is no doubt
that men do make successful use of self-inflicted discipline as a means
of influencing their own conduct. The lower degrees of such discipline
are put in practice whenever we have to change our habits in the most
minute particular. Without it we could not improve our pronunciation or
our handwriting.</p>

<p>The great difficulty, however, in providing for the punishment being
applied in the right quarter, when the punisher is identical with the
punished person, has led to the adoption of various imperfect solutions
of the problem of penance, in some of which the discipline is inflicted
by the arms on some other part of the body, and in others hunger is
brought into play by abstaining from food. But in no sacrament is
the intention of the administrator of such vital importance as in
self-penance. Spenser tells us how the Red-Cross Knight underwent
discipline under the directions of Patience.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">But yet the cause and root of all his ill,</div>
    <div class="verse indent2">Inward corruption and infected sin,</div><span class="pagenum" id="Page_451">[Pg 451]</span>
    <div class="verse indent0">Not purged nor healed, behind remained still,</div>
    <div class="verse indent2">And fest’ring sore, did ranckle yet within,</div>
    <div class="verse indent0">Close creeping ’twixt the marrow and the skin;</div>
    <div class="verse indent2">Which to extirpe, he laid him privily</div>
    <div class="verse indent2">Down in a darksome lowly place far in,</div>
    <div class="verse indent0">Whereas he meant his corrosives to apply,</div>
    <div class="verse indent0">And with streight diet tame his stubborn malady.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">In ashes and sackcloth he did array</div>
    <div class="verse indent2">His daintie corse, proud humours to abate</div>
    <div class="verse indent0">And dieted with fasting every day</div>
    <div class="verse indent2">The swelling of his wounds to mitigate;</div>
    <div class="verse indent0">And made him pray both early and eke late.</div>
    <div class="verse indent0">And ever as superfluous flesh did rot,</div>
    <div class="verse indent2">Amendment ready still at hand did wayt,</div>
    <div class="verse indent0">To pluck it out with pincers fiery whott</div>
    <div class="verse indent0">That soon in him was left no one corrupted iott.</div>
  </div>
</div>
</div>

<p>Here we see the advantage of allegory. In real life the poor man,
instead of having Patience and Amendment as his good friends standing
by his side, would have to conjure them up inside of him, and to apply
the pincers with his own hand. But setting allegory aside, we can
find here no exaltation of pain in itself. The pain is a necessary
concomitant of the extirpation of evil habits from a conscious being.
Amendment is the aim and end of the discipline, and the sole reason
that he has to heat his pincers fiery whott is that the evil which he
has to extirpe has crept close betwixt the marrow and the skin, and
requires the actual cautery to prevent its creeping further.</p>

<p>Again, in the Collect for the first Sunday in Lent, we pray for “grace
to use such abstinence,” that, our flesh being subdued to the spirit,
we may ever obey “the godly motions” of Christ. Abstinence is to be
used only as a help towards the subjugation of our lower nature, and
the opening up of our higher nature to divine influence.</p>

<p>I have said nothing of the aspect of penal suffering as a satisfaction
either of justice from the point of view of a ruler, or of vengeance
from the point of view of an aggrieved person.</p>
</div>

<p><span class="pagenum" id="Page_452">[Pg 452]</span></p>

<div class="blockquot">

<p>Nor have I attempted to discuss the process by which the suffering,
real or apparent, of one may be a direct source of pleasure to another
who has cultivated the spirit of cruelty. For I cannot think that pure
cruelty, as distinct from combativeness, anger and love of power, is
anything but a morbid growth of feeling, subject, of course, to the
general laws of the growth of feeling, whatever they may be, but no
more to be regarded as a subject for our discussion here than those
forms of perverted feeling which induce dogs to gnaw off their own
toes, or devotees to hold their arms above their heads till they can no
longer bring them down again.</p>


<p class="nindc space-above2">III.</p>

<p class="nindc">(PSYCHOPHYSIK.)</p>

<p class="right"><i>5th February 1878.</i></p>

<p>Whence came we? whither are we going? and what should we do now?
are three questions of some celebrity. We have come from somewhere
between this and Orion; we are going at—kilomètres per second towards
Hercules; and we must therefore observe stars in a direction at right
angles to our path;—are the answers suggested twenty-five years ago.
It seems to me that a change has come over the questions, so that they
now read, What used I to believe about myself? what is it likely I
shall have to believe about myself? and what should I believe about
myself now?</p>

<p>I used to believe myself to be the Conscious Ego. I am told I shall
have soon to believe myself to be a congeries of plastidule souls,
and that I must at once study psychophysik in order to obtain a true
knowledge of myself.</p>

<p>I propose, therefore, to talk of the Conscious Ego, of Plastidule
souls, and of Psychophysik.</p>

<p>(1.) What is your name? is a still more celebrated question. The
suggested answer, N. or M., recalls to the mathematician ideas and
operations of the most heterogeneous kind. Let us consider some of
them. The instructors of my youth would have expected me to answer—My
name is the Conscious Ego, one and indivisible, the Subject, in
relation to whom all other beings, material, human, or divine, are<span class="pagenum" id="Page_453">[Pg 453]</span>
mere Objects. Whether the being of such Objects can be maintained
or upheld apart from my continuous perception of them is the great
question of Metaphysics.</p>

<p>Though nothing can rise to the dignity even of an Object, except in
so far as it is perceived by me, I regard certain Objects as nearer
in rank to me, the Subject, than others, because it is through them
that other Objects are perceived. Indeed, I often catch myself, when
thinking about my body or my mind, supposing that I am thinking about
myself.</p>

<p>There are other objects within the sphere of our perceptions which
resemble our bodies, though they are not ours. The actions of these
objects are so far like our own that we not only attribute to these
objects the power of thinking, but also the consciousness of knowing,
feeling, desiring and willing. In short, we suppose that each of these
objects, when he asserts himself to be the Conscious Ego, means what we
do when we make a similar statement.</p>

<p>The late Professor Ferrier, in his “Metaphysic,” makes great use of
this Alter Ego, and for his own purposes he treats him as a true Ego,
whereas in Metaphysic he can never be more than an Object. This,
however, is only a confusion of persons, not an actual division of the
substance of the Ego. Our business to-night lies in the abysmal depths
of Personality, and relates to the Unity of the Ego.</p>

<p>A great deal of what has been written on this subject relates to the
continuity of the Ego in space and time, or in what corresponds in
metaphysic to the space and time of physic. And first of Space. Has the
Ego anything corresponding to Extension? Has he parts? and, if so, are
these parts separable in fact or even in idea?</p>

<p>It has been maintained that he has no parts; that his state of
consciousness at any instant is an inseparable whole, comparable, in
respect of extension, to a mathematical point. According to this view,
when I think I see an extensive prospect all at once before me, I am
in reality either actually rolling my eye in an unconscious frenzy,
or without any bodily motion I,—that is, the perceptive Ego,—am
attending<span class="pagenum" id="Page_454">[Pg 454]</span> first to one minimum visible, and then to another, so that
what is presented to me is like the idea which a blind man forms of
the shape of an object by stroking it with the end of his stick. The
evidence relates only to the position of points in the line traced
by the end of his stick, but he fills in the rest of the surface in
accordance with his notions of continuity and probability.</p>

<p>There is no department of psychophysik which has been so successfully
studied as that which relates to vision. When we keep not only our
eyes, but our attention, fixed on one small object, the field of
conscious vision seems to contract, till only that object remains
visible, and even it seems about to disappear. It generally happens,
however, that the feeling of uneasiness which grows upon us causes at
last a slight displacement of the eye, when suddenly a large extent of
the field starts into visibility, and the edges of objects, especially
those normal to the line of displacement, become obtrusively prominent.
This experiment seems at first sight to indicate that the central spot
of the retina has some exclusive privilege in the economy of vision.
What it really shows is that changes in the mode of excitation are
essential to perfect vision, and that vision cannot be maintained under
an absolute sameness of excitation. On the other hand, by means of the
instantaneous light of a single electric spark, we may read a whole
sentence of print. Here we know that though the illumination lasts only
for a few millionths of a second, the image on the retina lasts for
a time amply sufficient for an expert reader to go over it letter by
letter, and even to detect misprints. This experiment suggests certain
speculations about memory, a faculty which is often supposed to be
essential to the continuity of the Ego in time.</p>


<p class="space-above2">
When men wish to have things remembered, they set up monuments,
and write inscriptions and books,—they draw pictures and take
photographs,—in order that these material things may help them, in
time to come, to call up the thought of that which they were intended
to commemorate.</p>

<p>In our own bodies we have records of past events. Old<span class="pagenum" id="Page_455">[Pg 455]</span> wounds may
remind us of impressions made years ago, and ocular spectra remind us
of impressions made seconds ago. Even in quiet meditation we sometimes
find the ideas of visible objects accompanied with sensations hardly
less vivid than those produced by real objects, and the memory of
spoken words passes in a continuous manner, as the condition of our
nerves becomes more exalted, first into a silent straining of the
organs of speech, and then into an audible voice.</p>

<p>Beginners in music may practise on a dumb piano, and there is a silent
process by which we may improve our pronunciation of foreign words.</p>

<p>We can thus trace a continuous series of the instruments of memory,
beginning at the tables of stone and going on to the tables of the
heart; and we are tempted to ask whether all memorials are not of the
same kind—a physical impression on a material system.</p>

<p>The last American invention of the past year is Edison’s Talking
Phonograph. This instrument has an ear of its own, into which you may
say your lesson, and a mouth of its own, which at any future time is
ready to repeat that lesson.</p>

<p>The memory of this machine consists of tinfoil thin enough to be
impressionable by the metal style which is set in motion by the voice,
and yet thick enough to be retentive of these impressions, and at a
proper time to communicate a corresponding motion to the style of the
talking part of the machine.</p>

<p>Such is the heart of this instrument, by which it gets its speeches.
Are our own hearts essentially different? We know what damage can be
done to our memory by physical disturbances. We find ourselves quite
unable to recall what we had often perused and reperused on the pages
of memory. The page is lost out of our consciousness. Time goes on,
and some day we find that the page with all that it contained has been
restored to its place. Where was that page when it was out of our
consciousness? Not surely in the Ego, unless there be an unconscious
Ego. It must be out of the Ego, and therefore an Object. If this be so,
it is<span class="pagenum" id="Page_456">[Pg 456]</span> of no great consequence to the dignity of the Ego, whether this
particular object is purely spiritual or has a material substratum,
just as history is history, whether or not it has a material substratum
of paper and ink.</p>

<p>Memory is sometimes spoken of as if it were essential to individuality.
When I wish to convince myself that I am the same person as a certain
baby, I may do so by remembering as my own certain acts done by
that baby. It may happen, however, that I cannot ascertain whether
my present memory of these acts is due entirely to the direct
impression made by these acts on me, or whether it is not mainly due
to the frequent repetition of the story of these acts, as told to me
afterwards by older persons.</p>

<p>But even if I were to find my memory to be all wrong, and that I am not
that baby but a changeling, this would not touch my conviction that I
who now am, am one.</p>

<p>The phenomenon of double consciousness, though not common, seems to be
well established. A person has a double series of alternate states.
In one the memory, education, accomplishments, and temper, are quite
different from what they are in the other.</p>

<p>Instances have even been adduced of a man believing himself to be two
or even three different individuals at the same time. But when we come
to examine any particular case, we find that the man has nothing more
than an erroneous opinion that he is entitled to the position and
rights of the King, or of some other person, as well as his own, so
that even in his own imagination he is no more than a person who holds
several different offices at the same time.</p>

<p>(2.) The theory of Plastidule souls has been hinted at by several
persons of whom Dr. Tyndall has spoken loudest. A much clearer
utterance is that of Professor von Nägeli, of Munich, in an address
delivered at the Munich meeting of the German Association in 1877.</p>

<p>Du Bois Reymond, in an address to the same body at Leipzig in 1872, had
asserted—</p>

<p>“That in the first trace of pleasure which was felt by one of the
simplest beings in the beginning of animal life<span class="pagenum" id="Page_457">[Pg 457]</span> upon our earth, an
insuperable limit was marked; while upwards from this to the most
elevated mental activity, and downwards from the vital force of the
organic to the simple physical force, he nowhere finds another limit.”</p>

<p>To this Professor Nägeli replies—</p>

<p>“Experience shows that from the clearest consciousness of the thinker
downwards, through the more imperfect consciousness of the child, to
the unconsciousness of the embryo, and to the insensibility of the
human ovum,—or through the more imperfect consciousness of undeveloped
human races and of higher animals to the unconsciousness of lower
animals and of sensitive plants, and to the insensibility of all other
plants,—there exists a continuous gradation without definable limit,
and that the same gradation continues from the life of the animal ovum
and the vegetable cell downwards, through organised elementary and more
or less lifeless forms (parts of the cell), to crystals and chemical
molecules.”</p>

<p>Professor von Nägeli accepts the fact of sensation, appetency, and
thought in the higher forms of life; but instead of trying to resolve
it into a mechanical process, he levels up the discontinuity of the
chain of being by attributing sensation not only to all organisms, but
also to all cells, molecules, and atoms. This is what he says—</p>

<p>“Now, if the molecules possess anything which is ever so distantly
related to sensation, and we cannot doubt it, since each one feels the
presence, the certain condition, the peculiar forces of the other,
and, accordingly, has the inclination to move, and under circumstances
really begins to move—becomes alive as it were; moreover, since
such molecules are the elements which cause pleasure and pain; if,
therefore, the molecules feel something that is related to sensation,
then this must be pleasure, if they can respond to attraction and
repulsion, <i>i.e.</i> follow their inclination or disinclination;
it must be displeasure if they are forced to execute some opposite
movement, and it must be neither pleasure nor displeasure if they
remain at rest.”</p>

<p>Professor von Nägeli is what Professor Huxley would call a mere
biologist, or he would have known that the molecules,<span class="pagenum" id="Page_458">[Pg 458]</span> like the
planets, move along like blessed gods. They cannot be disturbed from
the path of their choice by the action of any forces, for they have
a constant and perpetual will to render to every force precisely the
amount of deflexion which is due to it. They must therefore enjoy a
perpetuity of the highest and most unmixed pleasure, even when, as
Professor Nägeli says, they are the cause of pain to us.</p>


<p class="space-above2">
To attribute life, sensation, and thought to objects in which these
attributes are not established by sufficient evidence is nothing more
than the good old figure of Personification.</p>

<p>If certain bodies, like the sun and stars, move in a regular manner
which we can predict, we may, if it pleases us, suppose that their
nature is like that of the just man whom nothing can turn from the path
of rectitude. If the motion of other bodies is less simple, so that we
cannot account for it, we may suppose their nature to be tainted with
that capriciousness which we observe in our fellow-men, and of which we
are occasionally conscious in ourselves.</p>

<p>But the study of nature has always tended to show that what we formerly
attributed to the caprice of bodies is only an instance of a regularity
which is unbroken, but which cannot be traced by us till we acquire the
requisite skill.</p>


<p class="space-above2">
But granting that the mental powers of atoms may be, for anything we
know, of the very highest order, what step have we made towards linking
our own mental powers with those of lower orders of being?</p>


<p class="space-above2">
(3.) Let us suppose that a thinking man is built up of a number of
thinking atoms. Have the thoughts of the man any relation to the
thoughts of atoms or of one or more of them? Those who try to account
by means of atoms for mental processes do so not by the thoughts of the
atoms, but by their motions.</p>

<p>Hobbes, in the frontispiece of his <i>Leviathan</i>, shows us a monster
like the wicker images of our British antecessors stuffed with men, and
the whole method of his book is<span class="pagenum" id="Page_459">[Pg 459]</span> founded on an analogy between the body
politic and the individual man.</p>

<p>Herbert Spencer has pushed the analogy both upwards and downwards
as far as it will go, and further than it can go on all fours. He
shows us how a society is an organism, and how an organism is a
society,—how the lower forms of societies and organisms consist of a
multitude of homogeneous parts, the functions of which are imperfectly
differentiated, so that each can at a pinch undertake the office
of any other; whereas the parts of higher forms of organisms and
societies are exceedingly heterogeneous, and discharge more perfectly
differentiated functions. Hence to the lower forms a breaking up may
be a multiplication of the species, whereas to the higher forms it is
death.</p>

<p>In a society, as in an organism, both the working and the thinking
will be better done if undertaken by different members, provided
that the thinking members can guide the working members, while the
working members support the thinking members,—the workers retaining
just enough intelligence to enable them to receive the guidance, and
the thinkers retaining just enough working power to enable them to
appropriate the pabulum presented to them by the workers.</p>

<p>Hence in the more highly developed systems the guiding powers may
be concentrated into a smaller portion of the whole system, and may
exercise a more undisputed power of guiding the rest, till in the
highest organism we arrive at what is called Personal Government, and
the organism may bear without abuse the grand old name of Individual.
This result is brought about by all the members except one bartering
their right of guiding themselves for the privilege of being guided,
and so delegating to the one ruling member the functions of government.
When the human society has lapsed into the condition of personal
government, the consciousness of the head of the state may be expressed
by him in the phrase, “L’état c'est moi;” but though the other
members of the society may delegate to the head all their political
powers, they cannot delegate their<span class="pagenum" id="Page_460">[Pg 460]</span> sensations or any other fact of
consciousness, for these are the incommunicable attributes of that Ego
to whom they belong.</p>


<p class="space-above2">
I have now to confess that up to the present moment I have remained
in ignorance of how I came to be, or, in the Spencerian language, how
consciousness must arise. I was dimly aware that somewhere in the
vast System of Philosophy this question had been settled, because the
Evolutionists are all so calm about it; but in a hasty search for it
I never suspected in how quiet and unostentatious a manner the origin
of myself would be accounted for. I am indebted to Mr. Kirkman for
pointing it out in his <i>Philosophy without Assumptions</i>. Here
it is with Mr. Kirkman’s comment. <i>Principles of Psychology</i>,
§ 179, p. 403:—“These separate impressions are received by the
senses—by different parts of the body. If they go no further than
the places at which they are received, they are useless. Or if only
some of them are brought into relation with one another, they are
useless. That an effectual adjustment may be made, they must all be
brought into relation with one another. But this implies some centre
of communication common to them all, through which they severally
pass; and, as they cannot pass through it simultaneously, they must
pass through it in succession. So that as the external phenomena
responded to become greater in number and more complicated in kind,
the variety and rapidity of the changes to which this common centre of
communication is subject must increase—there must result an unbroken
series of these changes—there must arise a consciousness.”</p>

<p>On this Kirkman remarks: “He knew he could do it, and he did it!”—What
was the evolution of light to this? The next Longinus will put that in
before γενέσθω φω̂ς καὶ έγένετο φώς.</p>


<p class="space-above2">
The opinions about my origin are as various as those about my nature.
Canon Liddon tells me that I, was created out of nothing in the year
1831, though I cannot<span class="pagenum" id="Page_461">[Pg 461]</span> make out from what he says on what day of
that year the event took place, or why my parents and not some one
else found me under a gooseberry bush; or, indeed, why I should have
any part or lot in family matters, from Adam’s first sin down to my
father’s last name.</p>

<p>Mr. Francis Galton tells me that I am developed from structureless
germs contributed not only by my two parents but by their remotest
ancestors centuries ago. My existence, therefore, does not begin
abruptly, but tails off as an exponential function of \(t\) does for
negative values of that variable. My local existence, however, though
at present confined within the periphractic region of my skin, was in
former times discontinuous as regards space, being carried about by
two, four, or more, distinct human beings.</p>

<p>Dr. Julius Müller tells me that by an analysis of my conscience I shall
come to a very different result, namely, that I existed (if, indeed,
the fact can be expressed by a past tense and not a pure aorist), in an
extra-temporal state, and that in that state I freely determined myself
to choose evil rather than good.</p>

<p>He does not say I can remember this transaction. The conviction I am to
acquire of it is not to be an experimental or empirical consciousness,
but a speculative or philosophical knowledge.</p>

<p>Since, according to Müller’s theory, this extra-temporal decision is
perfectly free, and since it would be difficult to predicate freedom of
a choice which is invariably on one side, he is obliged to assert that
in the extra-temporal state some of our species must have chosen the
better part. But he has also to maintain that all of us who are born
into this world by ordinary generation have already chosen the worse
part.</p>

<p>Hence, though he does not say so, he makes the extra-temporal fall a
condition of our being born into this world. Whether those of us who
make the better choice are born into some other world, or whether,
so long as they remain unfallen, they continue in the extra-temporal
state—a state certainly not higher but rather more undeveloped than
that of time—Müller does not say.</p>
</div>

<p><span class="pagenum" id="Page_462">[Pg 462]</span></p>

<div class="blockquot">

<p>Dr. John Henry Newman has shown us how the doctrine of post-baptismal
sin became developed into the discovery of Purgatory with all its
geographical details. It would seem as if the doctrine of original sin,
in the hands of speculative theologians, might open up to our view a
far more transcendental region, compared with which the stairs and
terraces and fires of purgatory are as familiar as those of our own
hearths and homes.</p>

<p>As to my present state, Du Bois Reymond tells me that not only my
bodily but a large part of my mental functions are performed by the
motion of atoms under fixed laws, and his result is that the finite
mind, as it has developed itself through the animal world up to man,
is a double one,—on the one side the acting, inventing, unconscious,
material mind, which puts the muscles into motion and determines the
world’s history: this is nothing else but the mechanics of atoms, and
is subject to the causal law; and on the other side the inactive,
contemplative, remembering, fancying, conscious, immaterial mind, which
feels pleasure and pain, love and hate: this one lies outside of the
mechanics of matter and cares nothing for cause and effect.</p>

<p>Dr. Drysdale tells me that not only my thinking powers but my feelings
are functions of the material organism, and that I myself am such
a function. He admits that I am not material—no function can be
material, for matter is a substance, and a function is not a being
at all. Dr. Drysdale, as a Christian materialist, follows his master
Fletcher, who says—</p>

<p>“As often as it shall be said that mind or the faculty of thinking is a
property of living matter,—that it is born with the body, is developed
with the body, decays with the body, and dies with the body,—it is to
be understood of the mind only, not the soul. The soul is something not
material indeed, but substantial—a divine gift to the highest alone
of God’s creatures, responsible for all the actions of mind, but as
totally distinct from it as one thing can be from another, or rather as
something is from nothing.”</p>

<p>Dr. Drysdale, however, in order to save the dynamical<span class="pagenum" id="Page_463">[Pg 463]</span> theory of life
and mind, says that this soul or spirit must either, if now existing,
be a passive spectator of the action of the living being connected with
it, or else that he has no existence during this present life, but is
to be constituted by a divine act after the death of the living being.</p>

<p>In either case, I cannot identify this soul with myself, for I know
that I exist now, and that I act, and that what I do may be right or
wrong, and that whether right or wrong, it is my act, which I cannot
repudiate.</p>


<p class="space-above2">
In this search for information about myself from eminent thinkers of
different types, I seem to have learnt one lesson, that all science
and philosophy and every form of human speech is about objects capable
of being perceived by the speaker and the hearer; and that when our
thought pretends to deal with the Subject it is really only dealing
with an Object under a false name. The only proposition about the
Subject, namely, “I am,” cannot be used in the same sense by any two of
us, and, therefore, it can never become science at all.</p>
</div>


<p class="nindc space-above2 space-below2">END OF PART I.</p>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_465">[Pg 465]</span></p>
<h2 class="nobreak" id="PART_II">PART II.<br>
<br>
<span class="allsmcap">CONTRIBUTIONS TO SCIENCE.</span></h2>
</div>

<div class="blockquot">

<p>“He was one of those who took more delight in the contemplation of
truth than in the praise of having discovered it.”</p>

<p class="right">
<span class="allsmcap">Playfair’s</span> <i>Memoirs of Dr. Hutton</i>.</p>
</div>

<p class="nind">
AT the close of the memoir published in the <i>Proceedings
of the Royal Society</i>, Mr. W. D. Niven, referring to Maxwell’s
scientific work, says:—</p>

<div class="blockquot">

<p>It is seldom that the faculties of invention and exposition, the
attachment to physical science, and capability of developing it
mathematically, have been found existing in one mind to the same
degree. It would, however, require powers somewhat akin to Maxwell’s
own, to describe the more delicate features of the works resulting from
this combination, every one of which is stamped with the subtle but
unmistakable impress of genius.</p>
</div>

<p>It will probably be many years before an approximate estimate can
be formed of the value of Maxwell’s work. In the following pages no
attempt has been made to give more than a brief account of a few of
his principal contributions to science. The chief subjects referred to
have, for convenience, been arranged in the following order:—</p>

<p>1. Experiments on Colour Vision and other contributions to Optics.</p>

<p>2. Investigations respecting Elastic Solids.</p>

<p>3. Pure Geometry.</p>

<p>4. Mechanics.</p>

<p>5. Saturn’s Rings.</p>

<p><span class="pagenum" id="Page_466">[Pg 466]</span></p>

<p>6. Faraday’s Lines of Force, and Maxwell’s Theory of the
Electro-magnetic Field, including the Electro-magnetic Theory of Light
and other investigations in Electricity.</p>

<p>7. Molecular Physics.</p>


<p class="space-above2">
1. The subject of colour-vision attracted Clerk Maxwell’s attention
at an early period. In dealing with phenomena of this class, we
must remember that it is necessary to distinguish between the
sensation itself and its physical cause, or between the subjective
and objective aspects of the same phenomenon. Thus a pure musical
<i>tone</i> consists of a regular succession of similar vibrations,
and two tones may differ in the extent of these vibrations, and in the
number which take place in a second. Corresponding to these physical
differences, are experienced differences in the <i>intensity</i> or
<i>loudness</i>, and the <i>pitch</i> of the note. Light, like sound,
consists objectively of certain periodic disturbances or vibrations of
a medium, but differs from sound in the character of the motion, the
nature of the medium which transmits it, and the number of vibrations
which take place in a second. The simplest kind of light consists, like
a pure tone in sound, of a regular succession of similar vibrations,
the extent of which determines the intensity of the light, while their
rapidity corresponds to the <i>colour</i> sensation produced. The
constitution of ordinary white light is much more complicated. Newton
allowed a beam of sunlight to pass through a prism, and then to fall
upon a screen, when, instead of a white patch of light, he obtained a
spectrum, or continuous band of colour, varying from crimson through
scarlet, orange, yellow, green, blue, to violet. Rays corresponding
to this infinite variety of colour must, therefore, exist together in
white solar light, and these rays differ physically from one another in
the rapidity of the vibrations of which they consist; the deep crimson
corresponding to less than 400,000,000,000,000 vibrations per second,
and the extreme violet to more than 700,000,000,000,000, the length of
a wave in air being, in the first case, about \(\dfrac{1}{39,000}\) of
an inch, and, in the second case, about \(\dfrac{1}{68,000}\) of an
inch.</p>

<p><span class="pagenum" id="Page_467">[Pg 467]</span></p>

<p>But white light is not necessarily of so complex a nature as sunlight;
thus it may consist of a mixture of red, green, and blue lights simply,
or of yellow and blue, or greenish-yellow and violet, or of other
mixtures of two or more kinds of light, each in itself homogeneous.
When this is the case, the constitution of the light is revealed when
it is allowed to pass through a prism, for it is then separated into
its simple constituents which, on emerging from the prism, pursue
different paths. Similarly, various kinds of homogeneous light may
be <i>matched</i> by means of a mixture of lights of other colours
appropriately chosen. Thus orange light of a particular hue may be
the homogeneous light of the spectrum, or it may be a mixture of red
and yellow or of red and green lights, which is <i>chromatically</i>
identical with the homogeneous orange, but <i>optically</i> different,
inasmuch as the mixture can be resolved into its constituents by means
of a prism, while the homogeneous orange light may be passed through
any number of prisms and yet retain its perfect homogeneity.</p>

<p>These results were accounted for by Thomas Young (1801), on the
supposition that there are three separate sensations which are excited
to different degrees—the proportion in which each is excited depending
on the nature of the light. He was of opinion that these three
sensations were red, green, and violet, and that all other hues were
compound <i>colours</i>, though they might correspond to a simple kind
of <i>light</i>. “The <i>quality</i> of any colour depends, according
to this theory, on the <i>ratio</i> of the intensities of the three
sensations which it excites, and its <i>brightness</i> depends on the
<i>sum</i> of these three intensities.”</p>

<p>Young’s colour diagram was a triangle, at the angular points of
which he placed the three colours corresponding, according to his
theory, with the primary sensations; along the sides of the triangle
were placed the colours formed by mixing these two and two together,
while within the triangle were to be found the colours resulting from
mixtures of all three in different proportions. The position of each
colour was determined by finding the centre of gravity, of two or<span class="pagenum" id="Page_468">[Pg 468]</span>
three heavy particles placed at the angular points of the triangle,
the weight of each particle being proportional to the quantity of the
corresponding light employed in the mixture.</p>

<p>Although the light of the spectrum which corresponds to any particular
spectral colour is simple in its constitution, consisting of a definite
number of waves per second, and ordinary white light is a combination
of an infinite number of such rays, varying in rapidity of vibration
from the extreme red to the extreme violet, yet the <i>mechanism of
vision</i> appears to be of a threefold character, so organised that
light of each particular wave-length affects in different proportions
the three colour senses, the hue depending on the relative amounts
to which they are severally excited, as explained by Young. An
analogy may help to make this distinction, clearer; thus, it has been
customary to speak of the heating power, the illuminating power, and
the photographic power, of any particular kind of light; and in the
solar spectrum formed by a <i>glass</i> prism the greatest heating
power is possessed by the ultra red rays, the greatest illuminating
power (judged by normal eyes) by the greenish yellow rays, and the
greatest photographic power (in relation to silver salts) by the
ultra-violet rays; but we do not thereby imply that there are three
separate classes of rays in solar light, consisting respectively of
heating rays, illuminating rays, and chemical rays: we simply mean that
any particular homogeneous ray possesses each of these three powers to
a certain extent. Similarly any ray of the spectrum may be capable of
stimulating each of three independent colour sensations, but it does
not follow that it consists physically of three different kinds of
light.</p>

<p>In the <i>Philosophical Magazine</i> for 1852 there is an account of
an experiment by Helmholtz, which consisted in mixing the colours of
the spectrum by forming two spectra from slits at right angles to each
other. It is obvious that if the breadth of each spectrum be equal to
its length, every pair of colours in the whole spectrum will in this
way be superposed. In Helmholtz’s experiment it appeared that a mixture
of yellow and indigo produced white.</p>

<p><span class="pagenum" id="Page_469">[Pg 469]</span></p>

<p>Maxwell’s first published experiments on the mixture of coloured
lights, executed while he was a B.A. at Cambridge, had reference to
the mixtures of coloured lights obtained from coloured papers. One of
the best accounts of these experiments will be found in the paper read
before the Royal Society of Edinburgh by Clerk Maxwell on 19th March
1855.</p>

<figure class="figcenter width500" id="i_507" style="width: 300px;">
<img src="images/i_507.jpg" width="300" height="301" alt="A circular
diagram resembling a protractor or compass dial, with numbered
gradations (0-90) around its outer rim, divided into shaded sections
with different hatching patterns (dotted, lined, cross-hatched) and one
blank quadrant-like wedge.">
<figcaption class="caption">
<p>Fig. 1.</p></figcaption>
</figure>

<p class="nind">
The instrument first employed was a top, constructed by Maxwell
himself; but he afterwards had tops made by Mr. Bryson of Edinburgh.
The coloured papers were cut into circular discs, with a small hole
in the centre to admit the spindle of the top, and were slit along a
radius from the circumference to the central hole. By this means two
or more discs could be placed together, and by turning one relatively
to the others, more or less of any particular<span class="pagenum" id="Page_470">[Pg 470]</span> disc could be made
visible from above. The top consisted of a disc of metal, covered
with white paper and mounted on a suitable spindle, the circumference
of which was divided into 100 equal parts. Two sizes of discs were
employed; the larger discs having been adjusted as required, were
placed on the graduated plate, and the smaller discs above them. The
plate then presented an appearance similar to that sketched in the
adjoining figure. The employment of the apparatus depends on the fact,
observed by Hartley the psychologist, that visual impressions remain
for some time on the retina even after the source of light has been
removed. Thus, suppose that the larger discs are respectively red,
green, and blue, and suppose that we look at the middle of the red
sector and then spin the top. If the spinning is sufficiently rapid the
impression produced by the red light will not have diminished sensibly
before the green paper takes the place of the red, and the green light
produces its effect on the same portion of the retina, and this again
is followed by blue before either the red or the green sensations have
sensibly diminished, and then the whole process is repeated many times
in a second. The impressions due to the three coloured lights are
therefore blended on the retina, and it can be shown experimentally
that the tint observed is the same as when the three kinds of light in
the same relative proportions are allowed to fall simultaneously upon
the eye. The colour top, therefore, enables us to mix together, in any
definite proportions, which can be changed at will, the lights from
differently coloured papers, and to observe the effect produced by the
mixing.</p>

<p>Suppose that the colours of the larger discs are red, green, and blue,
and that these are arranged so that the coloured lights may be mixed
in the proportions necessary to form white light. Then the colour
of the ring exhibited by the larger discs when the top revolves can
differ from that of white paper only in respect of illumination. If,
therefore, we can diminish the apparent brightness of the central
circle at will, we may produce a complete match. This may be effected
by combining a black disc, which<span class="pagenum" id="Page_471">[Pg 471]</span> emits very little light indeed,
with the white disc, so that the amount of light received from the
central circle is approximately proportional to the angle of the white
sector. On spinning the top, the central circle appears of a neutral
gray, which is the same as a dull white, and the darkness of the gray
increases with the amount of the black sector introduced. If, now,
the outer circle appears yellow compared with the central gray when
the top is spinning, it is found that, by increasing the amount of
blue and diminishing the red and green, the circles may be matched in
hue. Similarly, if it appears too green we must diminish the green and
increase the red and blue, while if it appears purple we must increase
the amount of green. After a little experience it is easy to recognise
the character of the change required.</p>

<p>Now, suppose that we have three and only three colour sensations, and
that, for the sake of argument, these correspond respectively to red,
green, and blue. Then if two colours contain the same amount of red,
the same amount of green, and the same amount of blue, they must be
in every respect identical. There are, therefore, three conditions to
satisfy in order that two colours may match. But in the case of the
top, two other conditions must be also fulfilled, for the portions of
the smaller discs employed must exactly fill up the circle, and the
same must be true of the larger discs. Hence there are in all five
conditions to be fulfilled in order to make a colour match, and in
general five discs will have to be employed and matched, two against
three or three against two. If there had been four primary colour
sensations, we should have required in general to employ six discs to
ensure a match, and so on for any other number. Maxwell showed that
with a normal eye a match could always be obtained with five discs,
but that with a colour-blind person a match could always be obtained
with four discs, thus demonstrating that the normal eye possesses
three independent colour sensations, while the eye of the colour-blind
possesses only two. This conclusion will appear more evident from the
experiments with the colour box, which will be described presently.</p>

<p><span class="pagenum" id="Page_472">[Pg 472]</span></p>

<p>The result of each experiment was first expressed by an equation in
which the colours in the outer circle, with their respective quantities
as coefficients, appeared on the left of the equation, and those in
the inner circle on the right side. Thus, employing \(\mathrm{V}\) for
vermilion, \(\mathrm{U}\) for ultramarine, and \(\mathrm{EG}\) for
emerald green, \(\mathrm{SW}\) for snow-white, and \(\mathrm{Bk}\) for
black, the equation
\[
\cdot 37 \mathrm{V}+\cdot 27 \mathrm{U}+\cdot 36 \mathrm{EG}=\cdot 28 \mathrm{SW}+\cdot 72 \mathrm{Bk}
\]
means that a sector of vermilion occupying 37 divisions of the outer
circle, combined with a sector of ultramarine occupying 27 divisions,
and a sector of emerald green occupying 36 divisions, produced, on
spinning, a colour which matched that obtained by a sector of white
paper occupying 28 divisons, and a sector of black occupying 72
divisions. The sum of the coefficients on each side of the equation is
of course 1.</p>

<p>The mode of conducting an experiment is best described in Maxwell’s own
words:—</p>

<div class="blockquot">

<p>As an example of the method of experimenting, let us endeavour to form
a neutral gray by a combination of vermilion, ultramarine, and emerald
green. The most perfect results are obtained by two persons acting in
concert, when the operator arranges the colours and spins the top,
leaving the eye of the observer free from the distracting effect of the
bright colours of the papers when at rest.</p>

<p>After placing discs of these three colours on the circular plate of
the top, and smaller discs of white and black above them, the operator
must spin the top and demand the opinion of the observer respecting the
relation of the outer ring to the inner circle. He will be told that
the outer circle is too red, too blue, or too green, as the case may
be, and that the inner one is too light or too dark as compared with
the outer. The arrangements must then be changed so as to render the
outer and inner circles more nearly alike. Sometimes the observer will
see the inner circle tinted with the complementary colour of the outer,
one. In this case the observer must interpret the observation with
respect to the outer circle, as the inner circle contains only black
and white.</p>

<p>By a little experience the operator will learn how to put his
questions, and how to interpret their answers.</p>
</div>


<p><span class="pagenum" id="Page_473">[Pg 473]</span></p>

<figure class="figcenter width500" id="i_512" style="width: 500px;">
<img src="images/i_512.jpg" width="500" height="438" alt="A triangular
color diagram filled with a hexagonal honeycomb pattern, displaying a
gradient spectrum of colors from red and orange at the bottom-left,
through yellow and green in the middle, to blue and dark navy at the
top, with purple tones on the left side.">
<figcaption class="caption">
<p>Plate 1.<br>
DIAGRAM SHEWING THE RELATIONS OF LIGHT.</p>
</figcaption>
</figure>


<div class="blockquot">

<p class="nind">
The observer should not look at the coloured papers, nor be told the proportions
of the colours during the experiments. When these adjustments have
been properly made, the resultant tints of the outer and inner circles
ought to be perfectly indistinguishable when the top has a sufficient
velocity of rotation. The number of divisions occupied by the different
colours must then be read off on the edge of the plate, and registered
in the form of an equation. Thus in the preceding experiment we have
vermilion, ultramarine, and emerald green outside, and black and white
inside. The numbers, as given by an experiment on the 6th March 1855,
in daylight without sun, are—
\[
37 \mathrm{V}+\cdot 27 \mathrm{U}+\cdot 36 \mathrm{EG}=\cdot 28 \mathrm{SW}+\cdot 72 \mathrm{Bk}.
\]</p>
</div>

<p>In a similar way matches were obtained in which the resulting tint was
a decided colour and not a neutral gray. Thus on the 5th of March 1855
a match was obtained as follows—
\[
\cdot 39 \mathrm{PC}+\cdot 21 \mathrm{U}+\cdot 40 \mathrm{Bk}=\cdot 59 \mathrm{V}+\cdot 41 \mathrm{EG},
\]
where \(\mathrm{PC}\) represents pale chrome. The resulting tint in
this case is an impure yellow.</p>

<p>Mixtures which appear to make perfect matches by one kind of light are
far from matching one another when viewed by a different light. Thus,
\(\mathrm{C}\) representing carmine, the following match was obtained
by daylight, viz.—
\[
\cdot 44 \mathrm{C}+\cdot 22 \mathrm{U}+\cdot 34 \mathrm{EG}=\cdot 17 \mathrm{SW}+\cdot 83 \mathrm{Bk}
\]
while by gaslight the match was
\[
\cdot 47 \mathrm{C}+\cdot 08 \mathrm{U}+\cdot 45 \mathrm{EG}=\cdot 25 \mathrm{SW}+\cdot 75 \mathrm{Bk}
\]
which shows that the yellowing effect of the gaslight tells more on the
white than on the combination of colours.”</p>

<p>Maxwell, following Young, represented the results of his experiments
graphically by means of a triangle, at the angular points of which he
placed the three colours which he believed to most nearly correspond
with the primary sensations. (See Plate I.) The colours he selected
for these positions were vermilion, ultramarine, and emerald green, of
such strength that, when mixed in equal proportions, they produced a
neutral gray which therefore appeared at the centre of the triangle.
In the paper published in the <i>Edinburgh Transactions</i> the reason
alleged for selecting green in preference to yellow is the fact that
it was found possible<span class="pagenum" id="Page_474">[Pg 474]</span> to produce a distinct yellow from a mixture of
emerald green and vermilion, but impossible to produce a green from
a mixture of blue and yellow. Any colour which can be produced by a
mixture of all the three primary tints will lie within the triangle;
but a colour which must be mixed with one of the primary tints in order
to match a mixture of the other two will lie without the triangle. Thus
the pale chrome referred to above must be mixed with blue in order to
match a mixture of red and green, and it must therefore be placed in
such a position that the centre of gravity of the yellow and blue taken
in proper proportions may be on the line joining the red and green, and
may divide this line in the inverse ratio of the amounts of red and
green respectively required. A copy of Maxwell’s diagram, showing the
chromatic relations of coloured papers, is given in the accompanying
plate (Plate II.) The original is in the Cavendish Laboratory.</p>

<p>As above mentioned, Maxwell found that in the case of colour-blind
persons only four discs (including black) were required instead of
five to ensure a match. The following is an example of a colour-blind
equation:—
\[
\cdot 19 \mathrm{G}+\cdot 05 \mathrm{B}+\cdot 76 \mathrm{Bk}=1 \cdot 00 \mathrm{R},
\]
where \(\mathrm{G}\), \(\mathrm{B}\), and \(\mathrm{R}\) represent
green, blue, and red respectively. To a normal eye the outer circle
represented by the left-hand side of the equation appears of a dark
blue green, but to the colour blind this matches the full red of the
smaller circle.</p>

<p>By comparing different colour matches, it is possible to determine
the position on the colour diagram of the tint corresponding to the
missing sensation in the colour-blind. Thus, if two colours appear to a
colour-blind person to match, they can only differ in their effect upon
a normal eye by the degree in which they excite the sensation which is
missing in the colour-blind, and they must therefore lie upon a line
passing through the position of this missing sensation. By determining
two such lines, the position of the pure sensation is located.</p>

<figure class="figcenter width500" id="i_515" style="width: 500px;">
<img src="images/i_515.jpg" width="500" height="636" alt="A triangular
color diagram with labeled colored circles at the vertices and along
the sides—including Ultramarine, Vermilion, Emerald Green, and various
blues, yellows, and reds—connected by lines radiating toward a Neutral
Line of Colour Blindness marked by a dashed diagonal.">
<figcaption class="caption">
<p>Plate II. DIAGRAM ILLUSTRATING THE CHROMATIC RELATIONS
OF COLOURED PAPERS.</p>
</figcaption>
</figure>

<p class="nind">
A line drawn through this point and the position of white is, to a
colour-blind person, a <span class="pagenum" id="Page_475">[Pg 475]</span>neutral line for its whole length (see Plate
II.) The position corresponding to the pure sensation which is missing
in the colour-blind is near the red, but outside the triangle, and
hence corresponds to a purer red than any in the solar spectrum (see p.
480).</p>

<p>The colour-blind generally class all tints as yellows or blues.
According to Maxwell’s theory, their sensations correspond to green and
blue; but the reason why they regard yellow as brighter than green lies
in the fact that although to the normal eye the sensation of yellow
is a combination of the sensations of red and green, yet yellows are
so much brighter than greens that light from them generally excites
the green sensation more powerfully than that from green objects
themselves, and hence yellows are more conspicuous than greens to the
colour-blind, but only in virtue of the green they contain.</p>

<p>To enable colour-blind persons to distinguish between red and green,
Maxwell had a pair of spectacles constructed, one eye-glass of which
was red and the other green, so that the object appeared differently
to the two eyes. These spectacles cause objects to appear to possess
a metallic lustre on account of the different ways in which they are
presented to the eyes. To the colour-blind a red object would appear
<i>brighter</i> when seen through the red glass, while a green object
would appear <i>brighter</i> through the green glass.</p>

<p>There are colour-blind persons whose vision is very different from that
described by Maxwell in his early papers, but to these we shall again
refer presently (p. 482).</p>

<p>It would occupy too much space to describe the different methods
adopted by Maxwell for the purpose of mixing light of different
colours, but his colour box demands a special notice, both on account
of the perfection with which it is adapted to the object in view and
the extreme beauty of its arrangement. The first two boxes constructed
were of inconveniently large dimensions. The form we shall describe is
that finally adopted, and the shell, as well as the principal optical
apparatus of the box, are still at the<span class="pagenum" id="Page_476">[Pg 476]</span> Cavendish Laboratory. The
description is taken from Maxwell's paper in the <i>Phil. Trans.</i>
for 1860.</p>

<figure class="figcenter width500" id="i_518a" style="width: 300px;">
<img src="images/i_518a.jpg" width="300" height="96" alt="A simple
line diagram showing a long rectangular box or chamber with labeled
points C, B, Z, Y, and E on the left side, and converging diagonal
lines meeting at points P, S, and M on the right side.">
<figcaption class="caption">
<p>Fig. 2.</p></figcaption>
</figure>

<p>Fig. 2 represents the instrument. At \(\mathrm{A}\) \(\mathrm{B}\)
is placed the apparatus represented in Fig. 3, in which
\(\mathrm{A}^{\prime} \mathrm{B}^{\prime}\) represents a rectangular
frame of brass, having a rectangular aperture of \(6 \times 1\) inches.</p>

<p class="nind">On this frame are placed six brass sliders, \(\mathrm{X Y Z}\). Each of
these carries a knife-edge of brass in the plane of the surface of the
frame.</p>

<figure class="figcenter width500" id="i_518b" style="width: 300px;">
<img src="images/i_518b.jpg" width="300" height="94" alt="A simple
rectangular diagram with hatched borders on all sides and four small
tabs or fasteners along the top and bottom edges, containing a series
of triangular or fan-shaped patterns within the enclosed area.">
<figcaption class="caption">
<p>Fig. 3.</p></figcaption>
</figure>

<p>At \(\mathrm{E}\) (Fig. 2) is a fine vertical slit. At \(e\),
\(\mathrm{M}^{\prime}\) and \(\mathrm{M}\) are three plane mirrors,
each inclined at \(45^\circ\) to the sides of the box. \(\mathrm{P}
\mathrm{P}^\prime\) are two prisms (angles \(45^\circ\)), and
\(\mathrm{S}\) is a concave silvered glass of radius, 34 inches.</p>

<p>If light enter the box at \(\mathrm{E}\), it will be reflected at
\(e\), and a portion of the pencil, after passing through the prisms,
will be reflected from \(\mathrm{S}\), and after again traversing the
prisms will form a spectrum at \(\mathrm{A B}\).</p>

<p>The six movable knife edges above referred to form three slits,
\(\mathrm{X Y Z}\), which may be so adjusted as to coincide<span class="pagenum" id="Page_477">[Pg 477]</span> with
any three portions of the pure spectrum formed by light from
\(\mathrm{E}\). The intervals between the sliders are closed with
hinged shutters, which allow the sliders to move without letting light
pass between them.</p>

<p>The inner edge of the brass frame is graduated to twentieths of an
inch, so that the position of any slit can be read off. The breadth of
the slit is ascertained by means of a wedge-shaped piece of metal, 6
inches long, and tapering to a point from a breadth of half an inch.
This is gently inserted into each slit, and the breadth is determined
by the distance to which it enters, the divisions on the wedge
corresponding to the 200th of an inch difference in breadth, so that
the unit of breadth is ·005 inch. The gauge is balanced on one finger,
and inserted into the slit till the pressure just causes it to slide
on the finger. This (on the same principle as in Whitworth’s Millionth
Measurer) ensures uniformity in the pressure in different measurements.</p>

<p>Now suppose light to enter at \(\mathrm{E}\), and to be refracted by
the two prisms \(\mathrm{P}\) and \(\mathrm{P}^\prime\), and after
reflection at \(\mathrm{S}\), to again pass through the prisms. A pure
spectrum, showing Fraunhofer’s lines, is formed at \(\mathrm{A B}\),
but only that part is allowed to pass which falls on the three slits
\(\mathrm{X Y Z}\). The rest is stopped by the shutters. Suppose that
the portion falling on \(\mathrm{X}\) belongs to the red part of the
spectrum: then, of the white light entering at \(\mathrm{E}\), only the
red will come through the slit \(\mathrm{X}\). If we were to admit red
light at \(\mathrm{X}\), it would be refracted to \(\mathrm{E}\) by the
principle in optics that the course of any ray may be reversed. If,
instead of red light we were to admit white light at \(\mathrm{X}\),
still only red light would come to \(\mathrm{E}\), for all other light
would be refracted more or less than the red, and would not reach the
slit at \(\mathrm{E}\). Applying the eye at the slit \(\mathrm{E}\),
we should see the prism \(\mathrm{P}\) uniformly illuminated with red
light of the kind corresponding to the part of the spectrum which
falls on the slit \(\mathrm{X}\) when white light is admitted at
\(\mathrm{E}\).</p>

<p>Let the slit \(\mathrm{Y}\) correspond to another portion of the
spectrum, say the green: then, if white light be admitted at<span class="pagenum" id="Page_478">[Pg 478]</span>
\(\mathrm{Y}\), the prism, as seen by an eye at \(\mathrm{E}\), will be
uniformly illuminated with green light; and if white light be admitted
at \(\mathrm{X}\) and \(\mathrm{Y}\) simultaneously, the colour seen
at \(\mathrm{E}\) will be a compound of red and green, the proportions
depending on the breadth of the slits and the intensity of the light
which enters them. The third slit \(\mathrm{Z}\) enables us to add a
third colour, and thus to combine any three kinds of light in any given
proportions, so that an eye at \(\mathrm{E}\) shall see the face of the
prism at \(\mathrm{P}\) uniformly illuminated with the colour resulting
from the combination of the three. The position of these three rays in
the spectrum is found by admitting the light at \(\mathrm{E}\), and
comparing the position of the slits with the position of the principal
fixed lines.</p>

<p>At the same time, another portion of the light from the source
(generally a sheet of white paper) enters the instrument at
\(\mathrm{BC}\), is reflected at the mirror \(\mathrm{M}\), passes
through the lens \(\mathrm{L}\), is reflected at the mirror
\(\mathrm{M}^{\prime}\), passes close to the edge of the prism
\(\mathrm{P}\), and is reflected along with the coloured light at
\(e\), to the eye-slit at \(\mathrm{E}\).</p>

<p>In this way the compound colour is compared with a constant white light
in optical juxtaposition with it. The mirror \(\mathrm{M}\) is made
of silvered glass, that at \(\mathrm{M}^{\prime}\) is made of glass
roughened and blackened at the back, to reduce the intensity of the
constant light to a convenient value for the experiments. By adjusting
the slits properly the two portions of the field may be made equal
both in colour and brightness, so that the edge of the prism becomes
almost invisible. When light enters at \(\mathrm{E}\), the instrument
gives a spectrum in which Fraunhofer’s lines are very distinct, and the
length of the spectrum between Fraunhofer’s lines \(\mathrm{A}\) and
\(\mathrm{H}\) is 3·6 inches. The outside measure of the box is 3 feet
6 inches, by 11 inches, by 4 inches, and it can be carried about, and
set up in any position, without readjustment.</p>

<p>In making an observation the centres of the slits \(\mathrm{X Y}\)
\(\mathrm{Z}\) are placed opposite the divisions of the scale
corresponding to the colours to be mixed, the breadth of each slit
being varied till the resultant light cannot be distinguished from the
white light reflected from \(\mathrm{M}\) and \(\mathrm{M}^{\prime}\).
If the mixture<span class="pagenum" id="Page_479">[Pg 479]</span> differs from the standard white light only by being
too bright or too dull, all the slits \(\mathrm{X Y Z}\) must be
opened or closed in the same proportion. The result of any observation
is expressed by an equation in which each particular colour employed
is represented by the corresponding division of the scale placed in
brackets, while the breadth of the slit is written as the coefficient
of this colour. Thus, the equation
\[
18 \cdot 5(24)+27(44)+37(68)=\mathrm{W}
\]
means that the breadth of the slit \(\mathrm{X}\) was 18·5, as measured
by the wedge, while its centre was at the division (24) of the scale;
that the breadths of \(\mathrm{Y}\) and \(\mathrm{Z}\) were 27 and 37,
and their positions (44) and (68); and that the illumination produced
by these slits was exactly equal, in the estimation of the observer, to
the constant white \(\mathrm{W}\).</p>

<p>In the first instance, recorded in the paper above referred to, the
observations were made by Professor Maxwell himself (J), and by Mrs.
Maxwell (K). Professor Maxwell’s complexion was dark and his hair
black; Mrs. Maxwell was extremely fair. The observations of each
exhibited very small errors from the mean, far less than would have
been expected, but there was always a difference apparent between the
two observers, and this always in the same direction. A difference of
this character was found by Maxwell to be general between dark and fair
persons, especially when the light fell on the centre of the retina
(the <i>fovea centralis</i> or <i>macula lutea</i>). To this point
reference will again be made.</p>

<p>By considering the errors in the several, observations between the
standard colours, Maxwell showed that greater accuracy is attainable
in the case of red light than in that of green or blue, and that
variations in <i>colour</i> are more easily detected than variations in
<i>brightness</i>.</p>

<p>One result of the observations is especially worthy of notice. It
follows from a comparison of the equations obtained in the several
parts of the spectrum that any tint in the spectrum lying between the
divisions (24) and (46) of the scale could be exactly imitated by
mixing in proper<span class="pagenum" id="Page_480">[Pg 480]</span> proportions the red of (24) and the green of (46),
while every tint lying between (48) and (64) could be produced by a
proper mixture of the green of (48) and the blue of (64). Hence if a
colour diagram be constructed as explained on page 473, the whole of
the spectrum between the red of (24) and the green of (46) will lie in
a straight line, forming one side of the triangle, while that lying
between (48) and (64) forms another side (the included angle being
not quite closed). It was also found that the violet beyond (68) lay
very nearly on the line joining (68) and (24), so that the spectrum
exhibited in this diagram “forms two sides of a triangle, with doubtful
fragments of the third side.” Thus “all the colours of the spectrum may
be compounded of those which lie at the angles of this triangle.” A
diminished copy of one of Maxwell's lecture diagrams, painted with his
own hand and deduced (it is believed) from experiments with the colour
top, is given in Plate I.<a id="FNanchor_246" href="#Footnote_246" class="fnanchor">[246]</a></p>

<p>By studying Plate I., it will be seen that a mixture of yellow and
blue lights produces varying shades of dirty yellow and pink, as the
relative amount of blue is increased, and by properly selecting the
yellow and blue a neutral gray (or white) may be obtained.</p>

<p>The pink tint produced by mixing blue and yellow lights had been
previously noticed by Helmholtz and others. The well-known fact that an
admixture of blue and yellow pigments produces generally a green was
explained by Helmholtz on other grounds. Suppose, for instance, that we
are provided with properly chosen blue and yellow glasses: let sunlight
shine through the blue glass and fall upon a screen, and allow a second
beam of sunlight, after reflection at a mirror, to pass through the
yellow glass and fall on the same portion of the screen as the blue
light. If the two colours<span class="pagenum" id="Page_481">[Pg 481]</span> are properly selected, the illuminated
portion of the screen will appear white or pink. Now place the pieces
of glass together, so that the same light passes through both, and the
light transmitted will be green. This is explained if we examine with
the prism the light transmitted by each glass. That which has passed
through the blue glass will show, in addition to blue light, a certain
amount of violet and green, while that which has passed through the
yellow glass will comprehend, in addition to yellow light, a certain
quantity of orange (perhaps red) and green. Now the only light capable
of passing through both glasses is green, and this, therefore, is the
colour observed on looking through the two together. Similarly, when
blue and yellow pigments are ground together, the light penetrates
a little way into the substance of the pigment, is reflected, and
emerges, some of its constituents being absorbed by one pigment and
some by the other, and the only light which both pigments transmit is
green, which is consequently the colour of the emergent light, and
therefore the hue of the mixture.</p>

<p>The set of colour equations given above, and the diagram of colours
there described, were obtained from the observations of Mrs. Maxwell
(K). The diagram obtained from Professor Maxwell’s (J’s) own
observations was slightly different, as before mentioned.<a id="FNanchor_247" href="#Footnote_247" class="fnanchor">[247]</a> The
chief differences were that (J) saw more green in the orange and yellow
portions of the spectrum than (K), so that in the diagram obtained from
his observations these colours appeared nearer the green than in the
other, while the colours between green and blue appeared more blue to
(J) than to (K), and were therefore placed higher up in his diagram.
Thus, when the instrument was adjusted to suit (K), one of the selected
colours being (32), (36), or (40), then (J) saw the mixture too green;
but if (48), (52), (56), or (60) were the selected colour when adjusted
for (K), it appeared too blue to (J), “showing that there was a real
difference in the eyes of<span class="pagenum" id="Page_482">[Pg 482]</span> these two individuals, producing constant
and measurable differences in the apparent colour of objects.”</p>

<p>With those colour-blind persons whom Maxwell first examined only two
slits were required to produce a colour chromatically identical with
white; while the spectrum, a little on the red side of the line F,
appeared to be identical with white. “From this point to the more
refrangible end the spectrum appears to them ‘blue.' The colours on the
less refrangible side appear all of the same quality, but of different
degrees of brightness; and when any of them are made sufficiently
bright they are called ‘yellow.'” Thus a colour-blind or dichromic
person, in speaking of red, green, orange, and brown, refers to
different degrees of brightness or purity of a single colour, and not
to different colours. This colour he calls yellow.</p>

<div class="blockquot">

<p>Of the three standard colours the red appears to them “yellow,” but
so feeble that there is not enough in the whole red division of the
spectrum to form an equivalent to make up the standard white. The
green at \(\mathrm{E}\) appears a good “yellow,” and the blue at
\(\dfrac{2}{3}\) from \(\mathrm{F}\) towards \(\mathrm{G}\) appears a
good “blue.”</p>
</div>

<p>It was for these researches that Maxwell received the Rumford Medal of
the Royal Society in 1860.</p>

<p>The only cases of colour-blindness which Maxwell met with in the
course of his earlier experiments were those of persons blind to red
rays. This, however, is not the only kind of colour-blindness known.
Some appear to be deficient in the blue (or violet) sensation. To
these persons bright yellow appears white, and the neutral line is
a line drawn through the yellow and the point corresponding to the
pure blue (or violet) sensation. In a valuable paper published in
the <i>Proceedings of the Royal Society</i>, vol. <span class="allsmcap">XXXI</span>. p.
302, M. Frithiof Holmgren, Professor of Physiology in the University
of Upsala, gave an account of a case of red blindness, and a case of
violet-blindness in each of which only one eye was really colour-blind,
the vision of the other being nearly normal. This peculiarity enabled
the observer to compare the experience of colours gained through one
eye<span class="pagenum" id="Page_483">[Pg 483]</span> with that gained by the other, and thus to state in the language
of those possessing normal vision, how colours really appear to the
colour-blind. His results agree in their general character with
Maxwell’s, but Holmgren (with many others) makes the third sensation
correspond to violet instead of blue, while, according to him, the
violet-blind class colours as red and yellow instead of red and green.</p>

<p>Though the largest and most important, Maxwell’s theory of compound
colours was by no means his only, or even his earliest, contribution to
Optics. While a bachelor-scholar at Trinity, at the request of Messrs.
Macmillan he wrote a considerable portion of a text-book on geometrical
optics. The work was never finished, but the MS. is still extant. The
mode of treating the subject, as stated by Professor Maxwell in one of
his letters to his father,<a id="FNanchor_248" href="#Footnote_248" class="fnanchor">[248]</a> is decidedly novel, and calculated to
bring down a storm of abuse upon the author. He starts by postulating
the possibility of obtaining perfect images, and then investigates the
laws of reflection and refraction necessary for this.</p>

<p>Perhaps the most remarkable of Maxwell’s contributions to Optics was
his identification of the velocity of light with the ratio of two
quantities, each of which is capable of being measured electrically;
but this subject will be again referred to in describing his electrical
researches. A paper on a general theory of optical instruments was
published by Maxwell in the <i>Quarterly Journal of Mathematics</i>
in 1858, and another on the same subject in the <i>Proceedings of the
Cambridge Philosophical Society</i>, 1866. A paper on the best mode of
projecting a spectrum on a screen appeared in the <i>Proceedings of the
Royal Society of Edinburgh</i> in 1869. We may also refer to the papers
on “The Focal Lines of a refracted Pencil,” in the <i>Proceedings of
the Mathematical Society of London</i> for 1871-3; on a “Bow seen on
the surface of ice,” in the <i>Proceedings of the Royal Society of
Edinburgh</i> for 1872; on “The Spectra of Polarised<span class="pagenum" id="Page_484">[Pg 484]</span> Light,” the
subject which had interested him so much in 1847 (see Part I., p.
84), in the <i>Transactions of the Royal Society of Edinburgh</i> for
1872; and on “Double Refraction in a Viscous Fluid in Motion,” in the
<i>Proceedings of the Royal Society</i> for 1873, and the <i>Ann. de
Phys. and Chimie</i>, 1874.</p>

<p>Among the many optical contrivances designed by Professor Maxwell,
we ought not to omit to mention the real-image stereoscope. This
instrument, in which ordinary stereoscopic slides are employed,
consists essentially of two convex lenses of short focal length, say 4
inches, placed side by side in a wooden frame at a distance from the
pictures, equal to twice their focal length, while the distance between
the centres of the lenses is half the distance between the centres of
the pictures. The result of this arrangement is that real images of
the two pictures of the same size as the pictures themselves, formed
one by one lens, and the other by the other, are superposed on the
axis of the instrument at a distance in front of the lenses equal to
twice their focal length, that is, as far in front of the lenses as
the pictures are behind them. The double, or stereographic image so
formed is viewed through a large lens at a suitable distance in front
of it, the observer standing at a distance of three or four feet. Many
persons<a id="FNanchor_249" href="#Footnote_249" class="fnanchor">[249]</a> who cannot appreciate the ordinary box stereoscopes obtain
very satisfactory effects with this instrument.</p>

<p>Professor Maxwell prepared a large number of stereoscope slides of
geometrical figures. Among them may be mentioned the surface of centres
of an ellipsoid, lines of curvature on an ellipsoid, and on elliptic
and hyperbolic paraboloids, the parabolic cyclide, the horned cyclide,
and the spindle cyclide, a twisted cubic with three asymptotes, a
Gordian knot, etc. The wood blocks from which these slides were printed
are now in the Cavendish Laboratory.</p>

<p>Another extremely pretty optical toy of his construction, at present in
the possession of Mrs. Maxwell, is a Zoëtrope,<span class="pagenum" id="Page_485">[Pg 485]</span> or “Wheel of Life.” In
the ordinary instrument, on looking through the slits in the revolving
cylinder the figures are seen moving on the opposite side of the
cylinder. Maxwell inserted concave lenses in place of the slits, the
lenses being of such focal length that the virtual image of the object
at the opposite extremity of the diameter of the cylinder was formed on
the axis of the cylinder, and consequently appeared stationary as the
cylinder revolved.<a id="FNanchor_250" href="#Footnote_250" class="fnanchor">[250]</a></p>

<p>In ordinary light the vibrations take place in all directions at
right angles to that in which the light is being transmitted. A beam
of ordinary light is therefore symmetrical on all sides. But it is
possible in various ways to confine all the vibrations to one plane.
Thus, if a ray be reflected from the surface of polished glass at a
particular angle, all the vibrations take place in one plane, and it is
generally believed that this plane is parallel to the surface of the
glass, and therefore perpendicular to the plane of incidence. Since all
the vibrations are now taking place in one plane, the beam of light has
acquired, as it were, sides or <i>poles</i>, and is said to be plane
<i>polarised</i>. There are other contrivances by which the movements
may be made all to take place in regular succession in a circle about
the direction of the ray as axis, and the light is then said to be
circularly polarised. This may be effected by passing a beam of plane
polarised light through a sheet of mica (or some other crystals) of a
particular thickness.</p>

<p>The velocity with which waves are transmitted through a substance
depends not only on the density but on the elasticity of the substance
<i>in the direction in which the vibrations take place</i>. How, many
crystals have different elasticities in different directions, and a
similar condition may be induced by mechanical means in other bodies.
In such substances the velocity of light depends on the direction in
which the vibrations take place; and, generally, if a beam of ordinary
light fall upon such a crystal it will be separated into two, one
of which will consist of vibrations in<span class="pagenum" id="Page_486">[Pg 486]</span> the direction in which the
elasticity is greatest (of all the directions which it can select), and
the other in that in which the elasticity is least. These rays, being
transmitted with different velocities, will be differently refracted,
and part company in the crystal; and since in each ray the vibrations
are in one direction only, each ray will be plane polarised, the
vibrations taking place in the two rays in planes perpendicular to one
another.</p>

<p>A Nicol’s prism consists of a long prism of Iceland spar cut into two
along a diagonal plane, the segments being cemented together again
by Canada balsam. The effect of the balsam is to reflect one of the
polarised rays out at the side of the prism while it allows the other
to pass through. Consequently, if common light fall on a Nicol’s prism,
only half of it will pass through, and this will be plane-polarised in
a particular plane. If another prism be placed in the path of the ray
and be situated similarly to the first, the light will pass through
it, but if it be turned around its axis through a right angle, the
light falling on it corresponds to that which is reflected out of the
prism by the balsam, and no light passes through the second prism.
Under these circumstances the Nicols are said to be crossed. Such
an arrangement of two Nicol’s prisms or any equivalent arrangement
which may be made with glass reflectors or crystals of tourmaline,
constitutes a polariscope; the first Nicol is called the polariser, the
second the analyser.</p>

<p>Fresnel first pointed out that by mechanical stress it is possible
to impart to glass a property analogous to that of doubly refracting
crystals, making its elasticity (for light) different in different
directions. Sir David Brewster showed that a piece of glass heated
and then suddenly cooled, <i>i.e.</i> unannealed, possesses similar
properties. If it be placed between the polariser and analyser of a
polariscope and examined by white light, a gorgeous display of colour
is observed. The reason is that the plane-polarised light from the
polariser on entering the glass is generally split into two rays
vibrating in planes at right angles to one another, and these pass
through the glass with different velocities.</p>

<p><span class="pagenum" id="Page_487">[Pg 487]</span></p>

<figure class="figcenter width500" id="i_530a" style="width: 400px;">
<img src="images/i_530a.jpg" width="400" height="373" alt="A colorful
pentagonal diagram featuring a dark, star-shaped silhouette at the
center surrounded by a white background, framed by a decorative
pentagon-shaped border with repeating circular medallions and striped
patterns in red, orange, blue, and green.">
<figcaption class="caption">
<p>CHROMATIC EFFECTS OF A PENTAGON OF UNANNEALED GLASS IN
POLARIZED LIGHT.</p></figcaption>
</figure>

<figure class="figcenter width500" id="i_530b" style="width: 400px;">
<img src="images/i_530b.jpg" width="400" height="377" alt="A colorful
triangular diagram featuring three oval-shaped yellow rings arranged
symmetrically with a gray Y-shaped or tripod form connecting their
centers, fra…A colorful triangular diagram featuring three oval-shaped
yellow rings arranged symmetrically with a gray Y-shaped or tripod form
connecting their centers, framed by a decorative triangular border with
concentric stripes in yellow, blue, and red.">
<figcaption class="caption">
<p>ISOCHROMATIC LINES IN A TRIANGLE OF UNANNEALED GLASS.</p>
</figcaption>
</figure>

<p class="nind">
When they reach the analyser only that component of each set
of vibrations can pass through which takes place in the plane
corresponding to transmission through the analyser. Then it may happen
that the two rays of light of one particular colour are so vibrating
that the waves interfere and destroy one another, so that this colour
is completely absent in the transmitted light while other colours are
partially destroyed. The result is that the combination of colours
which passes through produces a particular tint, and this will be
different according to the obliquity of the ray, the thickness of the
glass, and the amount of strain it has experienced, for on the latter
depends the difference of velocity of the two rays, and consequently
the particular colour destroyed in the case of glass of a given
thickness.</p>

<p>Maxwell’s first serious experiments on light appear to have had their
origin in his visit to Mr. Wm. Nicol in April 1847. After this visit
he constructed a polariscope of cardboard, employing blackened glass
mirrors as polariser and analyser. This was supplied with lenses for
use when a conical beam of polarised light was required. The lenses
were mounted in cardboard frames. A very similar instrument constructed
by him shortly afterwards, but of wood instead of cardboard, together
with the lenses mounted as before on cards, is still preserved in
the Cavendish Laboratory. Maxwell, after returning from Mr. Nicol’s,
prepared some samples of unannealed glass by heating pieces of thick
plate glass to redness and allowing them to cool rapidly. By means of a
<i>camera lucida</i> adapted to the cardboard polariscope he observed
and faithfully copied in water-colours some of the chromatic effects
exhibited by these plates of glass, showing the manner in which the
glass was strained by the rapid cooling. Some of these figures are
shown in Plate III., and will be again referred to.<a id="FNanchor_251" href="#Footnote_251" class="fnanchor">[251]</a> As mentioned
in the previous part<span class="pagenum" id="Page_488">[Pg 488]</span> of this work, of these water-colour drawings he
sent some to Nicol, who presented him in return with a pair of Nicol
prisms of his own construction, which are now, with the original
colour-top, polariscope, specimens of unannealed glass, etc., in the
Cavendish Laboratory. His experiments on the passage of light through
solids exposed to strain suggested to Maxwell the employment of
polarised light as an analyser of the strains in the different portions
of an elastic solid when exposed to mechanical stress, and led to the
production of the paper on “Elastic Solids” read before the Royal
Society of Edinburgh in February 1850; but before giving an account of
this paper we must mention another investigation connected with the
physiology of vision.</p>

<p>There are some persons who, when they look at a point in the sky
distant \(90^{\circ}\) from the sun, at once observe two conspicuous
yellow brushes with their axis in a plane passing through the sun,
while the space between exhibits the complementary violet colour. This
phenomenon was first noticed by Haidinger in 1844, and is known as
Haidinger’s Brushes. The appearance is only transitory, and disappears
in a very short time if the eye he kept directed to the same point in
the heavens. The same appearance is produced whenever “plane-polarised”
light enters the eye; as, for example, when light is reflected from a
polished surface of glass at a particular angle. But there are some
persons, on the other hand, who are apparently incapable of seeing
Haidinger’s Brushes, or only see them with difficulty. Generally it is
persons of a dark complexion who see Haidinger’s Brushes more readily
than others, and in such persons the <i>yellow spot</i> appears to be
peculiarly insensitive to blue light. A paper on this subject was read
before the mathematical and physical section of the British Association
by Professor Maxwell in 1866 (<i>Report</i>, Part II.) He found that
on looking through<span class="pagenum" id="Page_489">[Pg 489]</span> a solution of chrome alum, the centre of the field
of view appears distinctly pink and much paler than the rest of the
solution on account of this peculiarity of the foramen centrale. The
effect decreases if the observer continue to look. Maxwell’s attention
was first called to this peculiarity of his own eye by noticing a black
hand in the blue portion of the spectrum whenever he directed his eye
straight to that portion. The hand never appeared in any other part
of the spectrum, but followed the eye up and down the spectrum in the
blue, vanishing as soon as the optic axis passed out of the blue into
other colours.</p>

<p>The following account of Maxwell’s explanation of Haidinger’s Brushes,
and the personal reminiscences which accompany it, have been kindly
contributed by Professor William Swan:—</p>

<div class="blockquot">

<p>My earliest noteworthy recollection of Clerk Maxwell dates from 1850,
when the British Association was in Edinburgh, and its “Section A”
used to meet in the natural philosophy class-room of the University.
That year communications were made by Sir David Brewster and Professor
Stokes on the remarkable phenomenon of vision discovered by Haidinger
in 1844, and since known as “Haidinger’s Brushes.” One day when a paper
had been read, which, if I remember rightly, was Brewster’s, a young
man rose to speak. This was Clerk Maxwell. His utterance then, most
likely, would be somewhat spasmodic in character, as it continued to be
in later times, his words coming in sudden gushes with notable pauses
between; and I can well remember the half-puzzled, half-anxious, and
perhaps somewhat incredulous air, with which the president and officers
of the section, along with the more conspicuous members who had chosen
“the chief seats” facing the general audience, at first gazed on the
raw-looking young man who, in broken accents, was addressing them.
For a time I was disposed to set down his apparent embarrassment to
bashfulness; and such, I daresay, was the general impression. Bashful,
very likely, in some degree he was. But, at all events, he manfully
stuck to his text; nor did he sit down before he had gained the
respectful attention of his hearers, and had succeeded, as it seemed,
in saying all he meant to say.</p>

<p>My only tolerably distinct further recollection is that he handed in
a small piece of apparatus which he had made by cementing together on
glass sectors of sheet gutta-percha, these<span class="pagenum" id="Page_490">[Pg 490]</span> being so cut out of the
sheet and put together that its fibrous structure, due to rolling in
the process of manufacture, should radiate, at least approximately,
from a central point. This arrangement, as I understood at the time,
in polarised light, reproduced, or rather simulated, Haidinger’s
phenomenon. But after an interval of thirty years I must speak with
caution. Brewster (British Association <i>Report</i>, 1850), ascribed
Haidinger’s phenomenon to “polarising structure existing in the cornea
and crystalline lens, as well as in the tissues which lie in front
of the sensitive layer of the retina;” while Stokes <i>proved</i>
that, when the variously coloured rays of the prismatic spectrum
were admitted separately into the eye, in the blue rays alone could
Haidinger’s Brushes be seen. A few years later, in his paper “On the
Unequal Sensibility of the Foramen Centrale to Light of Different
Colours” (Brit. Assoc. <i>Report</i>, 1856), Clerk Maxwell says that,
on looking through a prism at a long vertical slit he saw an elongated
dark spot running up and down the spectrum, but refusing to pass out
of the blue into the other colours. This appearance, he concludes, is
due to the “Foramen centrale” of Soemmering; and he adds that when a
Nicol’s prism is employed the brushes of Haidinger are well seen <i>in
connection with the spot</i>. The appearance of a dark spot on a blue
ground <i>only</i>, Maxwell then, or at least afterwards, believed to
be due to the yellow pigment of the macula lutea, of which the fovea
centralis, as its name imports, is the middle portion, and, as is well
known, the place of most distinct vision, having a special selective
absorption for the blue rays. His notable discovery that Haidinger’s
Brushes were only to be seen in connection with the shadow of the
yellow spot thus pointed conclusively to the spot itself as the seat of
the phenomenon; or, as he himself puts it, makes evident the fact that
the brushes are the spot analysed by polarised light. Having thus, to
his own satisfaction, localised the polarising structure concerned in
the production of Haidinger’s phenomenon, he seems to have rested, for
I am not aware that he ever wrote again on the subject. No such writing
at least appears in the Royal Society catalogue of scientific memoirs.
Possibly he hoped that some day he might himself examine the actual
structure of the yellow spot; or he may have waited for the result of
such examination by other hands than his own. Helmholtz, who cites
Maxwell’s paper of 1856, attributes the phenomenon of the brushes to
a radiating fibrous structure, which, it seems, has actually now been
ascertained to exist in the fovea centralis, which he assumes to be
feebly polarising, and to possess a special selective absorbing power
for the blue rays. (Helmholtz,</p>
</div>

<p><span class="pagenum" id="Page_491">[Pg 491]</span></p>

<figure class="figcenter width500" id="i_536" style="width: 500px;">
<img src="images/i_536.jpg" width="500" height="531" alt="A circular
diagram divided into four quadrants by black diagonal lines, each
containing small cross-shaped arrow markers, surrounding a central core
of concent…A circular diagram divided into four quadrants by black
diagonal lines, each containing small cross-shaped arrow markers,
surrounding a central core of concentric colored rings (red, orange,
green, blue) around a white hollow center.">
<figcaption class="caption">
<p>Plate IV. DIAGRAM SHEWING THE COLOURS EXHIBITED BY A
PLATE OF GELATINE WHEN EXPOSED TO A TORSIONAL SHEAR.</p>
</figcaption>
</figure>

<div class="blockquot">

<p class="nind">
<i>Optique Physiologique</i>, 1867, pp. 548-554.) All Maxwell’s
conclusions regarding Haidinger’s Brushes, seem thus to be definitely
verified.</p>

<p class="nindc"><span class="allsmcap">William Swan,</span><br>
Ardchapel, Helensburgh, <i>2d April</i> 1882.</p>
</div>

<p class="space-above2">
2. In the paper read before the Royal Society of Edinburgh on
Feb. 18, 1850, Maxwell describes the mathematical results of the
application of Stokes’s theory of elasticity to a number of cases of
the deformation of elastic solids, which results, when possible, he
tested experimentally by subjecting the strained solid to analysis by
polarised light. The first, and perhaps the most interesting, example
given in this paper, refers “to the case of a hollow cylinder, of which
the outer surface is fixed, while the inner surface is made to turn
through a small angle.” The conclusions derived we give in Maxwell's
own words:—</p>

<div class="blockquot">

<p>Therefore, if the solid be viewed by polarised light (transmitted
parallel to the axis), the difference of retardation of the oppositely
polarised rays at any point in the solid will be inversely proportional
to the square of the distance from the axis of the cylinder, and the
planes of polarisation of these rays will be inclined \(45^{\circ}\) to
the radius at that point.</p>

<p>The general appearance is, therefore, a system of coloured rings,
arranged oppositely to the rings in uniaxial crystals, the tints
ascending in the scale as they approach the centre, and the distance
between the rings decreasing towards the centre. The whole system
is crossed by two dark bands inclined \(45^{\circ}\) to the plane
of primitive polarisation, when the plane of the analysing plate is
perpendicular to that of the first polarising plate (see Plate IV.)</p>

<p>A jelly of isinglass poured, when hot, between two concentric
cylinders, forms, when cold, a convenient solid for this experiment;
and the diameters of the rings may be varied at pleasure by changing
the force of torsion applied to the interior cylinder.</p>

<p>By continuing the force of torsion while the jelly is allowed to dry, a
hard plate of isinglass is obtained, which still acts in the same way
on polarised light, even when the force of torsion is removed.</p>

<p>It seems that this action cannot be accounted for by supposing the
interior parts kept in a state of constraint by the exterior parts,
as in unannealed and heated glass; for the optical<span class="pagenum" id="Page_492">[Pg 492]</span> properties of the
plate of isinglass are such as would indicate a strain pressing in
every part of the plate in the direction of the original strain, so
that the strain on one part of the plate cannot be maintained by an
opposite strain on another part.</p>

<p>Two other uncrystallised substances have the power of retaining the
polarising structure developed by compression. The first is a mixture
of wax and resin, pressed into a thin plate between two plates of
glass, as described by Sir David Brewster in the <i>Philosophical
Transactions</i> for 1815 and 1850.</p>

<p>When a compressed plate of this substance is examined with polarised
light, it is observed to have no action on light at a perpendicular
incidence; but when inclined it shows the segments of coloured rings.
This property does not belong to the plate as a whole, but is possessed
by every part of it. It is, therefore, similar to a plate cut from a
uniaxial crystal perpendicular to the axis.</p>

<p>I find that its action on light is like that of a <i>positive</i>
crystal, while that of a plate of isinglass, similarly treated, would
be <i>negative</i>.</p>

<p>The other substance which possesses similar properties is gutta-percha.
This substance in its ordinary state, when cold, is not transparent
even in thin films; but if a thin film be drawn out gradually, it
may be extended to more than double its length. It then possesses a
powerful double refraction, which it retains so strongly that it has
been used for polarising light. As one of its refractive indices is
nearly the same as that of Canada balsam, while the other is very
different, the common surface of the gutta-percha and Canada balsam
will transmit one set of rays much more readily than the other, so
that a film of extended gutta-percha placed between two layers of
Canada balsam, acts like a plate of nitre treated in the same way. That
these films are in a state of constraint may be proved by heating them
slightly when they recover their original dimensions.</p>
</div>

<p>Some pieces of gutta-percha mounted in this way by Professor Maxwell
are still preserved in the Cavendish Laboratory; as are also the
original plates of isinglass above referred to. The interior cylinder
employed for twisting these plates was a cork, and in one of the plates
two corks were placed with their circumferences about \(\dfrac{3}{8}\)
in. apart, and were twisted equally in the same direction. The result
of this operation is described as case XIII. in the paper in question,
and is determined geometrically by the<span class="pagenum" id="Page_493">[Pg 493]</span> superposition of the two
conditions of strain due to the two twists independently.</p>

<figure class="figcenter width500" id="i_539" style="width: 300px;">
<img src="images/i_539.jpg" width="300" height="236" alt="A symmetrical
geometric diagram showing concentric oval/elliptical rings with two
smaller nested oval clusters at the center, intersected by horizontal
and vertical axis lines marked with small tick marks.">
<figcaption class="caption">
<p>Fig. 4.</p></figcaption>
</figure>

<p class="nind">
The isochromatic curves thus obtained are represented in Fig. 4, which
is taken from that in the <i>Edinburgh Transactions</i>. The points
\(\mathrm{B}_{1}\), \(\mathrm{B}_{2}\), correspond to no retardation.
These curves completely agree with those obtained when the plate of
isinglass is examined with circularly polarised light. The advantage
of employing circularly polarised light lies in the fact that whatever
may be the direction of the lines of stress in the isinglass the two
component rays into which the light may be supposed separated on
entering the medium are of equal intensity, and the colour therefore
depends only on the state of strain and not on the position of the
plane of primitive polarisation.</p>

<p>The last example of stress in an elastic solid is that of a triangle
of unannealed glass, in which “the lines of equal intensity of the
action on light are seen without interruption by using circularly
polarised light.” They are represented in Plate III. In Figs. 5 and 6
\(\mathrm{A}\), \(\mathrm{BBB}\), \(\mathrm{DDD}\), are the neutral
points, or points of no action on light, and \(\mathrm{CCC}\),
\(\mathrm{EEE}\), are<span class="pagenum" id="Page_494">[Pg 494]</span> the points where the action is greatest; and
the intensity of the action at any other point is determined by its
position with respect to the isochromatic curves.</p>

<p>“The direction of the principal axes of pressure at any point is found
by transmitting plane polarised light, and analysing it in the plane
perpendicular to that of polarisation. The light is then restored in
every part of the triangle, except in those points at which one of the
principal axes is parallel to the plane of polarisation. A dark band
formed of all these points is seen, which shifts its position as the
triangle is turned round in its own plane.</p>

<figure class="figcenter width500" id="i_540" style="width: 300px;">
<img src="images/i_540.jpg" width="300" height="283" alt="A symmetrical
geometric diagram showing a triangle with vertices labeled D at each
corner, containing curved loop-like shapes connecting points labeled B
and E near the center and at the midpoints of each side.">
<figcaption class="caption">
<p>Fig. 5.</p></figcaption>
</figure>

<p class="nind">
Fig. 5 represents these curves for every fifteenth degree of
inclination. They correspond to the lines of equal variation of the
needle in a magnetic chart.</p>

<p>“From these curves others may be formed which shall indicate, by
their own direction, the direction of the principal axes at any
point. These curves of direction of compression and dilatation are
represented in Fig. 6; the curves whose direction corresponds to that
of <i>compression</i>, are concave toward the centre of the triangle,
and intersect at right angles the curves of dilatation.”</p>

<p><span class="pagenum" id="Page_495">[Pg 495]</span></p>

<p>The figures on Plate III. are copies of water-colour sketches made by
Professor Maxwell in the very early periods of these investigations,
and show the isochromatic lines in unannealed glass in the case of a
pentagon and a triangle.</p>

<figure class="figcenter width500" id="i_541" style="width: 300px;">
<img src="images/i_541.jpg" width="300" height="250" alt="A symmetrical
geometric diagram showing a triangle with vertices labeled D at each
corner, filled with an intricate network of curved field-lines forming
three distinct nodes labeled B and E near the corners and center.">
<figcaption class="caption">
<p>Fig. 6.</p></figcaption>
</figure>

<p>The remainder of the paper on elastic solids is taken up with a
discussion of a number of examples of great importance to the engineer,
such as the flexure of beams, the torsion of cylinders, and the like.
To these engineering problems Maxwell again returned many years later,
and his paper “On Reciprocal Figures, Frames, and Diagrams of Force,”
read before the Royal Society of Edinburgh, 7th February 1870, received
the award of the Keith Medal. The Theory of Oërsted’s Piezometer, given
in the paper of 1850, is, however, of great scientific value. In it
Maxwell points out that the behaviour of a vessel exposed to equal
pressures within and without depends only on its cubic compressibility,
while the relation between the cubic compressibility and the rigidity
in solids, so far from being constant,<span class="pagenum" id="Page_496">[Pg 496]</span> as Poisson supposed, may be
almost any whatever, cork having great rigidity in comparison with its
power to resist compression, while caoutchouc, on the other hand, has
extremely little.</p>


<p class="space-above2">
3. While a bachelor-scholar of Trinity College, on March 13, 1854,
Clerk Maxwell read a paper before the Cambridge Philosophical Society
“On the Transformation of Surfaces by Bending.” This paper, which
embodies a great deal of thought, and indicates that its author
possessed an extensive acquaintance with the geometrical works of
Gauss, Monge, Liouville, and others, is of more interest to the pure
mathematician than to the general reader, but in connection with it we
may mention a surface which was prepared for Professor Maxwell many
years afterwards, and coated by his own hands, as described below,
and now preserved in the Cavendish Laboratory. If a heavy uniform
string be suspended from two points, and allowed to hang freely, it
assumes the form of a curve called a catenary. If a board be cut out
in this shape, and the string be stretched around its edge, then cut
at the lowest point and one-half of the string unwrapped so as always
to be kept stretched, and therefore the free portion of the string a
tangent to the board at the point where it leaves it, the extremity
of the string will describe a curve called a tractory, because it is
the curve traced by a particle lying on a rough horizontal plane,
when the end of a string attached to it describes a straight line on
the plane, the particle starting from a point outside the straight
line. As we go farther along the curve traced by the particle, we of
course continually approach the straight line described by the end of
the string, but never reach it. This straight line is the “asymptote”
of the tractory, and is also the “directrix” of the catenary above
referred to. If the tractory be made to revolve about its asymptote
it will trace out a surface which has the peculiarity that the
<i>intrinsic curvature</i> is the same at every point of the surface
and is negative, the two principal radii of curvature being opposite
in direction and inversely proportional the one to the<span class="pagenum" id="Page_497">[Pg 497]</span> other. If a
flexible surface be constructed so as to fit a portion of the surface
of the solid, thus forming a coat, it will be found to fit equally well
at every part of the surface, and it may be inverted or turned through
any angle whatever, and it will continue to fit every portion of the
solid equally well. By weaving together curved strips of parchment
paper and pasting them, Professor Maxwell constructed a coat which
fitted every portion of the solid, however it might be placed upon it.</p>

<p>Maxwell’s fondness for geometry has already been alluded to more than
once, and not unfrequently he would take up geometrical questions of a
very generalised character. A simple and very good illustration of some
of his investigations in this department is to be found in a paper “On
Hills and Dales,” published in the <i>Philosophical Magazine</i> for
December 1870. In this paper, having described the general character of
contour-lines, or the lines in which the surface of the earth is cut
by level surfaces. Maxwell proceeds to show<a id="FNanchor_252" href="#Footnote_252" class="fnanchor">[252]</a> that the number of
summits, or regions of elevation reduced to points, exceeds by one the
number of passes, a pass being the point where two regions of elevation
unite. Similarly, the number of Bottoms, or regions of depression,
exceeds by one the number of Bars, a Bar being the boundary between two
regions of depression. Lines of slope are defined as lines everywhere
perpendicular to the contour lines. By following lines of slope we
generally reach a Summit or a Bottom, but we may reach a Pass or Bar.
“Districts whose lines of slope run to the same bottom are called
Basins or Dales. Those whose lines of slope come from the same summit
may be called, for want of a better name, Hills.” “Dales are divided
from each other by Watersheds, and Hills by Watercourses.” “Lines of
Watershed are the only lines of slope which do not reach a bottom, and
lines of Watercourse are the only lines of slope which do not reach
a summit.” These extracts indicate<span class="pagenum" id="Page_498">[Pg 498]</span> Maxwell’s anxiety that definite
meanings should be assigned to all scientific terms, and that they
should be used only in the senses so defined. A further illustration of
this trait in his character is found in his paper “On the Mathematical
Classification of Physical Quantities,” published in <i>The Proceedings
of the London Mathematical Society</i>, vol. <span class="allsmcap">III</span>. No. 34. We
give one other example, taken from <i>Matter and Motion</i>, a little
work published by the S. P. C. K., and a model of scientific accuracy
and philosophic thought. “When the simultaneous values of a quantity
for different bodies or places are equal, the quantity is said to be
<i>uniformly</i> distributed in space.” “When the successive values of
a quantity for successive instants of time are equal, the quantity is
said to be <i>constant</i>.” Such examples might be multiplied almost
indefinitely from Maxwell’s published writings. The more elementary
the work the greater need did he see for exactness in definitions and
accuracy in the use of words; and perhaps no one has done more than
Maxwell in giving accuracy to the expression of scientific thought.
His influence in this respect has especially been felt by all who have
attended the Physical School in Cambridge. On one occasion he remarked,
in his half-humorous way, that spheres are <i>inclusive</i> figures but
circles are <i>exclusive</i>:—people are always <i>trying</i> to get
<i>into</i> other circles, but to do so they must get <i>out of</i>
their own spheres.</p>


<p class="space-above2">
4. The keystone as well as the foundation of physical science is
dynamics—a subject to which Maxwell was greatly attracted in early
days, and to which, even in its most elementary principles, he
constantly reverted in after life. We have already referred to his
Dynamical Theory of the Electromagnetic field; the sections of his
<i>Treatise on Electricity and Magnetism</i>, which are devoted to
dynamical principles and the general equations of motion, form a most
valuable compendium of dynamics; while for those who require less
strong meat, his treatment of the subject in the <i>Theory of Heat</i>
leaves little to be desired; and last, but not least, under the
comprehensive title of <i>Matter and Motion</i>, we have a treatise on
dynamics written for<span class="pagenum" id="Page_499">[Pg 499]</span> children in the higher grade schools, so simple
that the most casual reader will think that he understands it, while
it is the admiration of professed mathematicians, and by no means
easy reading for those who expect, or have gained, high places in the
mathematical tripos: but as the book is well within the reach of every
reader, it is unnecessary here to attempt any detailed account of it.</p>

<p>But Maxwell’s investigations in dynamics were not confined to paper.
Of the problems suggested to him by the devil on two sticks we have
no account. During his residence in Cambridge he endeavoured to
investigate the process by which a cat is enabled invariably to alight
on her feet. The mode of conducting the experiments and the impression
they left on the mind of the College will appear from the following
extract from a letter written to Mrs. Maxwell, from Trinity, on January
3d, 1870, when Professor Maxwell was examining for the Mathematical
Tripos:—</p>

<div class="blockquot">

<p>There is a tradition in Trinity that when I was here I discovered a
method of throwing a cat so as not to light on its feet, and that I
used to throw cats out of windows. I had to explain that the proper
object of research was to find how quick the cat would turn round, and
that the proper method was to let the cat drop on a table or bed from
about two inches, and that even then the cat lights on her feet.</p>
</div>

<p>The “Dynamical Top,” which wag invented by Maxwell to illustrate
dynamical propositions, technically so-called, was, in its final form,
constructed of brass by Mr. Ramage of Aberdeen. It was this top which
Maxwell brought with him to Cambridge when he came up for his M.A.
degree in the summer of 1857, and exhibited to a tea-party in his room
in the evening. His friends left it spinning, and next morning Maxwell,
noticing one of them coming across the court, leapt out of bed, started
the top, and retired between the sheets. It is needless to say that the
spinning power of the top commanded as great respect as its power of
illustrating Poinsot’s <i>Theorie Nouvelle de la Rotation des Corps</i>.</p>

<p>In the work just referred to, Poinsot shows that a body<span class="pagenum" id="Page_500">[Pg 500]</span> supported at
its centre of gravity and rotating freely about it will move in the
same manner as an ellipsoid whose centre is fixed, but which rolls in
such a way as always to rest against a fixed plane (the invariable
plane), which is, of course, a tangent plane at the point of contact.
The line from the centre to the point of contact is the axis about
which the body is at the instant rotating, and this line will, unless
the plane touch the ellipsoid at the extremity of one of the principal
axes, move both in space and in the body. The curve which the extremity
of the axis of rotation describes on the invariable plane is called
a herpolhode, while that which it describes on the surface of the
ellipsoid is called a polhode. If at any instant the axis of rotation
be very near either to the greatest or least axis of the ellipsoid,
it will always remain very near that axis, and the polhode will be a
small closed curve and the rotation will be stable; but if the axis of
rotation be near to the <i>mean</i> axis of the ellipsoid, the polhode
will be a very large curve, the axis of rotation will in time deviate
very widely from its original position in the body, and the motion will
be unstable.</p>

<p>Maxwell’s top consisted of a brass bell, a long screw passing through
the top of the bell and terminating in a steel point “finished without
emery and afterwards hardened,” serving as the axle. The point rested
in an agate cup on the top of a pillar. A heavy nut could be screwed
up and down on the axle for coarse adjustments, and the axle could be
screwed through the top of the bell, to bring the point to coincide
with the centre of gravity of the mass. The moments of inertia could
be altered by means of the nut above referred to, and by nine screws
with massive milled heads, six of which screwed horizontally into the
rim of the bell, while three were arranged symmetrically around the
top of the rim, and admitted of a vertical motion. By means of these
screws the axle could be made the axis of greatest, least, or mean
moment of inertia, or not a principal axis at all. The axle terminated
in a point, by which a coloured disc could be fixed upon it. “The best
arrangement, for general observations, is to have the disc of card
divided into<span class="pagenum" id="Page_501">[Pg 501]</span> four quadrants, coloured with vermilion, chrome yellow,
emerald green, and ultramarine. These are bright colours, and if the
vermilion is good they combine into a grayish tint when the revolution
is about the axle, and burst into brilliant colours when the axis is
disturbed. It is useful to have some concentric circles, drawn with
ink, over the colours, and about twelve radii drawn in strong pencil
lines. It is easy to distinguish the ink from the pencil lines, as
they cross the invariable axis, by their want of lustre. In this way
the path of the invariable axis may be identified with great accuracy,
and compared with theory.” If the top revolve about its axle, the
whole disc will appear gray, but when the axle moves, the quadrants in
which the “invariable axis” lies will be indicated by a circle of the
corresponding colour appearing in full purity. Whenever the invariable
line crosses an ink or pencil line, a dark ink dot or lustrous pencil
dot will appear at the centre of the circle, and when it passes into
another quadrant the circle will contract, then change its colour, and
expand again. The use of the nine screws is thus indicated by Professor
Maxwell:—“There must be three adjustments to regulate the position
of the centre of gravity, three for the magnitude of the moments of
inertia, and three for the directions of the principal axes—nine
independent adjustments, which may be distributed as we please among
the screws of the instrument.” A full account of the top and the mode
of using it, together with a note on the rotation of the earth, will
be found in the <i>Transactions of the Royal Society of Edinburgh</i>,
vol. <span class="allsmcap">XXI.</span>, from which the above quotations have been taken.</p>


<p class="space-above2">
5. In 1610 Galileo turning his telescope to Saturn, observed a
projection on each side of the planet, which led him to conclude that
“Saturn consists of three stars in contact with one another.” In 1659
Huygens discovered the true nature of these appendages, which, by
their continually varying forms, had puzzled previous astronomers,
and concluded that Saturn is girded with a thin flat ring inclined to
the ecliptic; its external diameter being about \(2 \dfrac{1}{4}\)
times that of the<span class="pagenum" id="Page_502">[Pg 502]</span> planet itself. In 1665 William Bell observed a dark
line running round the northern surface of the ring. In 1675 Cassini
noticed the same on the other surface, and concluded that the ring
consists of two concentric rings, of which the inner is the brighter.
Hadley observed the shadow of the planet thrown upon the surface of the
ring, and the shadow of the ring on the planet, and showed that Saturn
rotates in the same plane with the rings. In 1714 Moradi observed a
want of symmetry in the ring on opposite sides of the planet, and found
that when it had disappeared on the eastern side it was still visible
on the western, but he did not discover the cause of the phenomena. The
observations of Sir William Herschel, published in 1790, corroborated
the opinion of Cassini respecting the division. By observing certain
spots on the surface of the planet, Herschel found that it rotated on
its axis in 10 hours 29 minutes 16·8 seconds in the same direction as
the rotation of the earth. In 1789, as the earth passed through the
plane of Saturn’s ring, Herschel noticed some bright spots on the edge
of the ring which were carried almost to the end of the diameter, and
appeared to rotate about Saturn in about 10 hours \(32 \dfrac{1}{4}\)
minutes.</p>

<p>The observations of the present century show that the outer of the two
bright rings is permanently divided into two concentric rings by a very
narrow gap, and when their plane is inclined to the line of sight at a
considerable angle, so that the rings are widely open, a series of dark
elliptic curves near the extremities of the major axis of the elliptic
projection indicates that each ring is still further broken up into a
number of thin concentric rings, the gaps between them being apparently
filled by the edges of the inner rings except near the extremity of the
major axis of the projections.</p>

<p>In 1850 a dark ring encircling Saturn within the other two rings was
discovered independently by three astronomers in England and America.
The distance between the outer edge of the dark ring and the inner edge
of the adjoining bright ring appeared to vary between narrow limits,
the<span class="pagenum" id="Page_503">[Pg 503]</span> rings sometimes appearing to be in contact. This innermost ring
is transparent, so that the edge of the planet can be seen through it,
and as it is seen in all positions without distortion it seems that the
ring cannot consist of a transparent gas or liquid. The rings appear to
be much thicker near the planet than at their outer edges. A comparison
of measurements of the diameters of the rings at different times seems
to indicate a rapid change in their breadths, the circumference of the
outer ring extending outwards, while the inner bright ring appears
to be approaching the planet, so that the whole breadth of the ring
system is increasing. At least this is the conclusion to which Struve
arrived from a comparison of his measurements with those of Huygens
and Herschel.<a id="FNanchor_253" href="#Footnote_253" class="fnanchor">[253]</a> According to Hind the exterior diameter of the
outer ring is about 170,000 miles, its interior diameter 150,000;
the exterior diameter of the inner bright ring is 147,000 miles, its
interior diameter 114,000 miles; and the equatorial diameter of the
planet 75,500 miles; but, as above stated, the breadth of the rings
appears to be increasing. Sir John Herschel was of opinion that the
thickness of the rings did not exceed 100 miles, and Bessel calculated
that their mass, as determined by the disturbance they produced in one
of Saturn’s satellites, did not exceed \(\dfrac{1}{118}\)th the mass of
the planet.</p>

<p>If Saturn’s rings were solid and at rest, but of course subject to
the attraction of the planet, the stress upon them would be such that
we can conceive of no material capable of sustaining it. Maxwell
remarked that iron would not only be plastic but semi-fluid under
such stresses. By allowing the rings to rotate, the attraction of the
planet might expend itself in producing the necessary acceleration
towards the centre, or, as is generally stated, might be balanced by
the centrifugal force, and the stress might be thus relieved to a
great extent; but if the rings rotated with the velocity proper to the
interior of the inner ring, the rest<span class="pagenum" id="Page_504">[Pg 504]</span> would tend to fly off into space,
while if they rotated with the velocity proper to the exterior of the
outer ring, the inner portions would tend to fall towards the planet;
and even if they rotated with the velocity proper to any intermediate
portion of the system, the parts beyond would tend to fly outwards, and
the parts within would tend to fall towards the planet, unless this
tendency were compensated by the attraction of the ring itself. But
there is another objection to the hypothesis of the rings being uniform
solids, viz. the instability of the motion. If the motion of the ring
were slightly disturbed, as is always the case, it would not return to
its original orbit, but its deviation would increase until it came in
contact with the planet itself.</p>

<p>Laplace was the first to investigate the conditions of stability of
Saturn’s ring system. He concluded that if the rings are solid, they
must consist of a great number of very small concentric rings, each
rotating independently with its proper velocity about the planet. The
velocity calculated by Laplace for the circumference of the outer ring
agreed with that determined, as above mentioned, by Herschel. Laplace
avoided the difficulty of the instability of the rings above alluded
to by supposing that they were not homogeneous, but that their centres
of gravity were at some distance from their geometrical centres.
Laplace also showed that, for the attraction of the ring to neutralise
its tendency to split up, it is necessary that its density should be
\(\dfrac{10}{13}\) that of the planet. In 1851 Professor Pierce showed
that the number of rings in the system must be very much greater than
Laplace had supposed. This was the position of the question when it was
taken up by Maxwell.</p>

<p>On March 23d, 1855, the Examiners announced the subject for the Adams
Prize in the following terms:—</p>

<div class="blockquot">

<p>The University having accepted a fund raised by several members of St.
John’s College, for the purpose of founding a prize to be called the
Adams Prize, for the best essay on some subject of pure mathematics,
astronomy, or other branch of natural philosophy, the prize to be given
once in two years, and to be <i>open to the competition of all persons
who have at any time been admitted to a degree in this University</i>:—</p>
</div>

<p><span class="pagenum" id="Page_505">[Pg 505]</span></p>

<p>The Examiners give notice, that the following is the subject for the
prize to be adjudged in 1857:—</p>

<div class="blockquot">

<p class="nindc"><i>The Motions of Saturn's Rings.</i></p>

<p>\(\because\) The Problem may be treated on the supposition that the
system of Rings is exactly, or very approximately, concentric with
Saturn, and symmetrically disposed about the plane of his equator, and
different hypotheses may be made respecting the physical constitution
of the Rings. It may be supposed (1) that they are rigid; (2) that
they are fluid, or in part aeriform; (3) that they consist of masses
of matter not mutually coherent. The question will be considered to
be answered by ascertaining, on these hypotheses severally, whether
the conditions of mechanical stability are satisfied by the mutual
attractions and motions of the Planet and the Rings.</p>

<p>It is desirable that an attempt should also be made to determine on
which of the above hypotheses the appearances both of the bright rings
and the recently discovered dark ring may be most satisfactorily
explained; and to indicate any causes to which a change of form,
such as is supposed from a comparison of modern with the earlier
observations to have taken place, may be attributed.</p>
</div>

<p>In his essay, to which the prize was adjudged, and which occupies
sixty-eight pages of quarto, Maxwell considered in the first place
the hypothesis of Laplace, and showed that to secure stability the
irregularity of the ring must be enormously great. Speaking of
Laplace’s conclusion that the rings must be irregular, Maxwell says:—</p>

<div class="blockquot">

<p>We may draw the conclusion more formally as follows:— If the rings
were solid and uniform, their motion would be unstable, and they would
be destroyed; but they are not destroyed, and their motion is stable,
therefore they are either not uniform or not solid.</p>

<p>I have not discovered, either in the works of Laplace or in those of
more recent mathematicians, any investigation of the motion of a ring
either not uniform or not solid. So that, in the present state of
mechanical science, we do not know whether an irregular solid ring, of
a fluid or disconnected ring, can revolve permanently about a central
body; and the Saturnian system still remains an unregarded witness in
heaven to some necessary but as yet unknown development of the laws of
the universe.</p>
</div>

<p><span class="pagenum" id="Page_506">[Pg 506]</span></p>

<p>The following extract shows how Maxwell mentally realised every problem
which he considered:—</p>

<div class="blockquot">

<p>When we have actually seen that great arch swung over the equator of
the planet without any visible connection, we cannot bring our minds
to rest. We cannot simply admit that such is the case, and describe
it as one of the observed facts in nature, not admitting or requiring
explanation. We must either explain its motion on the principles of
mechanics, or admit that, in the Saturnian realms, there can be motion
regulated by laws which we are unable to explain.</p>
</div>

<p>The investigation of the stability of the motion of a solid ring,
otherwise uniform but loaded with a heavy particle upon its
circumference, led to the conclusion that the mass of the particle must
be about four and a half times that of the rest of the ring—</p>

<div class="blockquot">

<p>But this load, besides being inconsistent with the observed appearance
of the rings, must be far too artificially adjusted to agree with the
natural arrangements observed elsewhere, for a very small error in
excess or defect would render the ring again unstable.</p>

<p>We are therefore constrained to abandon the theory of the solid ring,
and to consider the case of a ring the parts of which are not rigidly
connected, as in the case of a ring of independent satellites, or a
fluid ring.</p>

<p>There is now no danger of the whole ring, or any part of it, being
precipitated on the body of the planet. Every particle of the ring is
now to be regarded as an independent satellite of Saturn, disturbed by
the attraction of a ring of satellites at the same mean distance from
the planet, each of which, however, is subject to slight displacements.
The mutual action of the parts of the ring will be so small compared
with the attraction of the planet that no part of the ring can ever
cease to move round Saturn as a satellite.</p>

<p>But the question now before us is altogether different from that
relating to the solid ring. We have now to take account of variations
in the form and arrangement of the parts of the ring, as well as its
motion as a whole, and we have as yet no security that these motions
may not accumulate till the ring entirely loses its original form, and
collapses into one or more satellites circulating round Saturn. In
fact such a result is one of the leading<span class="pagenum" id="Page_507">[Pg 507]</span> doctrines of the “nebular
theory” of the formation of planetary systems; and we are familiar with
the actual breaking up of fluid rings under the action of “capillary
force,” in the beautiful experiments of M. Plateau.</p>

<p>In this essay I have shown that such a destructive tendency actually
exists, but that by the revolution of the ring it is converted into the
condition of dynamical stability.</p>
</div>

<p>The investigation of the motion of a ring composed of a continuous
liquid, led to the result that the waves set up in the ring would cause
it to break up into a number of drops which might revolve as satellites
about Saturn; but if the condition of stability was not fulfilled,
they would coalesce, forming a smaller number of larger drops, until
the condition of stability was secured; and the same would be the case
if the ring were supposed to consist of a number of concentric narrow
rings. The liquid ring, therefore, did not afford a more satisfactory
result than the solid one, though it appeared that the internal
friction would produce no sensible effect, and Maxwell had recourse to
“the dusky-ring, which is something like the state of the air supposing
the siege of Sebastopol conducted from a forest of guns 100 miles one
way and 30,000 miles the other, and the shot never to stop but go
spinning away round a circle radius 170,000 miles.”<a id="FNanchor_254" href="#Footnote_254" class="fnanchor">[254]</a> This, however,
is not the order in which the investigations appear in the paper before
us.</p>

<p>Having dismissed the assumption of the solid rings, Maxwell
investigated the effect of disturbance on a ring of small transverse
section, the parts of which are not rigidly connected. The disturbances
he treated as made up of “harmonic” elements, according to Fourier’s
method; and, first treating the ring as a number of equal satellites
revolving round the planet, he found that such a ring “can always be
rendered stable by increasing the mass of the central body and the
angular velocity of the ring.” If the ring consist of 100 satellites,
the mass of the planet must exceed<span class="pagenum" id="Page_508">[Pg 508]</span> 4352 times that of the ring in
order to secure stability for all displacements. “If this condition
be not fulfilled,... then, although the motion depending upon long
undulations may remain stable, the short undulations will increase
in amplitude till some of the neighbouring satellites are brought
into collision.” The satellites of such a ring, when the condition
of stability is fulfilled, admit of four vibrations in different
periods in ellipses about their mean positions, and these vibrations
will be transmitted as waves with different velocities round the
ring, so that the form of the ring at any instant resembles “that of
a string of beads forming a re-entering curve, nearly circular, but
with a small variation of distance from the centre,” forming a number
of “regular curves of transverse displacement at regular intervals
round the circle. Besides these, there are waves of condensation and
rarefaction, the effect of longitudinal displacement.” Any external
disturbance, such as a satellite or wave in another ring, will produce
a <i>forced</i> wave in the ring, and if the angular velocity of the
external disturbing cause around the ring coincide, or nearly coincide,
with the velocity of one of the free waves of the ring, the amplitude
of the forced wave will increase indefinitely until the ring is
destroyed; but if this condition is not fulfilled, the forced wave will
accompany the disturbing cause around the ring as the tide follows the
moon.</p>

<p>The effect of one ring upon another is to produce in it a series of
<i>forced</i> waves travelling with the same angular velocity as the
<i>free</i> waves in the disturbing ring. Hence in a system of two
rings “there will be eight waves in each ring, and the corresponding
waves in the two rings will act and react on each other, so that,
strictly speaking, every one of the waves will be in some measure a
forced wave, although the system of eight waves will be the free motion
of the two rings taken together.”</p>

<p>The dynamical stability of a ring of satellites is explained by the
consideration that when one of the satellites, in consequence of its
oscillations, moves with more than its mean velocity, and thus gets in
front of its proper position,<span class="pagenum" id="Page_509">[Pg 509]</span> it will be carried farther away from the
planet, and thus not only will its linear velocity be diminished, but,
in virtue of its increased distance, its angular velocity will be still
farther diminished and, lagging behind, it will fall back into its
proper position and, oscillating through it with a velocity less than
its mean, will approach the planet and the reverse action will take
place.</p>

<p>After considering the manner in which the ring will break up if
the condition of stability is not fulfilled, Maxwell takes up the
question of “the dusky ring,” consisting of innumerable small
particles resembling “a shower of rain, hail, or cinders.” For the
stability of such a ring its <i>average</i> density must not exceed
\(\dfrac{1}{300}\) of that of the planet, and the density of Saturn
being only ·7505, it follows that the average density of the ring
cannot greatly exceed that of air at ordinary pressure. Laplace showed
that for a ring to rotate as a whole with uniform velocity about
Saturn, the density of the planet cannot exceed 1·3 times that of the
ring. Hence the particles must move independently, or in a series of
concentric rings.</p>

<p>In the case of concentric rings of satellites, their mutual
disturbances will destroy one another if the velocity of any one of the
four free waves of one coincide, or nearly coincide, with that of any
free wave in another; and it is impossible that there should be any
great number of rings without this condition frequently recurring.</p>

<div class="blockquot">

<p>In the case of a large number of concentric rings, the stability of
each pair must be investigated separately, and if in the case of any
two, whether concentric rings or not, there are a pair of conspiring
waves, those two rings will be agitated more and more till waves of
that kind are rendered impossible by the breaking up of those rings
into some different arrangement. The presence of the other rings cannot
prevent the mutual destruction of any pair which bear such relations to
each other.</p>

<p>It appears, therefore, that in a system of many concentric rings there
will be continually new cases of mutual interference between different
pairs of rings. The forces which excite these disturbances being very
small, they will be slow of growth, and it is possible that by the
irregularities of each of the rings<span class="pagenum" id="Page_510">[Pg 510]</span> the waves may be so broken and
confused as to be incapable of mounting up to the height at which they
would begin to destroy the arrangement of the ring. In this way it may
be conceived to be possible that the gradual disarrangement of the
system may be retarded or indefinitely postponed.</p>

<p>But supposing that these waves mount up so as to produce collisions
among the particles, then we may deduce the result upon the system
from general dynamical principles. There will be a tendency among the
exterior rings to move farther from the planet, and among the interior
rings to approach the planet, and this either by the extreme interior
and exterior rings diverging from each other, or by intermediate parts
of the system moving away from the mean ring.</p>

<p>The final result, therefore, of the mechanical theory is, that the only
system of rings which can exist is one composed of an indefinite number
of unconnected particles revolving round the planet with different
velocities, according to their respective distances. These particles
may be arranged in a series of narrow rings, or they may move through
each other irregularly. In the first case the destruction of the system
will be very slow, in the second case it will be more rapid, but there
may be a tendency towards an arrangement in narrow rings which may
retard the process.</p>
</div>

<p>The transparency of the inner ring, which allows the planet to be seen
through it <i>without distortion</i>, and the observed changes in the
configuration of the rings themselves, all favour this conclusion.</p>

<div class="blockquot">

<p>If the changes already suspected should be confirmed by repeated
observations with the same instruments, it will be worth while to
investigate more carefully whether Saturn’s rings are permanent or
transitionary elements of the solar system, and whether in that part of
the heavens we see celestial immutability or terrestrial corruption and
generation, and the old order giving place to new before our own eyes.</p>
</div>

<p>The apparatus constructed by Maxwell to illustrate the motions of the
satellites in the rings has been already referred to.<a id="FNanchor_255" href="#Footnote_255" class="fnanchor">[255]</a> It is an
arrangement in which ivory balls are made to go through the motions
belonging to the first or fourth of<span class="pagenum" id="Page_511">[Pg 511]</span> the four series of waves above
mentioned, except that the balls describe circles instead of ellipses
about their mean positions. We give the description as printed in the
essay; the apparatus itself is in the Cavendish Laboratory.</p>

<figure class="figcenter width500" id="i_557" style="width: 300px;">
<img src="images/i_557.jpg" width="300" height="242" alt="A two-part
technical diagram: on the left, a mechanical apparatus with vertical
rods, pivoting arms, and labeled points (K, H, C, R, P, A, Q)
suggesting a linkage or governor mechanism, and on the right, a large
spoked wheel mounted on a stand with a perforated rim and small pegs
around its circumference.">
<figcaption class="caption">
<p>Fig. 7. and Fig. 8.</p></figcaption>
</figure>

<p>The instrument stands on a pillar A (Figs. 7 and 8), in the upper part
of which turns the cranked axle CC. On the parallel parts of this
axle are placed two wheels, RR and TT, each of which has thirty-six
holes, at equal distance, in a circle near its circumference. The
two circles are connected by thirty-six small cranks of the form KK,
the extremities of which turn in the corresponding holes of the two
wheels. The axle of the crank K which passes through the hole in the
wheel S is bored so as to hold the end of the bent wire which carries
the satellite S. This wire may be turned in the hole so as to place
the bent part carrying the satellite at any angle with the crank. A
pin P, which passes through the top of the pillar, serves to prevent
the cranked axle from turning; and a pin Q, passing through the pillar
horizontally, may be made to fix the wheel R<span class="pagenum" id="Page_512">[Pg 512]</span> by inserting it in a hole
in one of the spokes of that wheel. There is also a handle H, which is
in one piece with the wheel T, and serves to turn the axle.</p>

<p>Now suppose the pin P taken out, so as to allow the cranked axle to
turn, and the pin Q inserted in its hole so as to prevent the wheel R
from revolving; then if the crank C be turned by means of the handle H,
the wheel T will have its centre carried round in a vertical circle,
but will remain parallel to itself during the whole motion, so that
every point in its plane will describe an equal circle, and all the
cranks K will be made to revolve exactly as the large crank C does.
Each satellite will therefore revolve in a small circular orbit in the
same time with the handle H, but the position of each satellite in that
orbit may be arranged as we please, according as we turn the wire which
supports it in the end of the crank.</p>

<p>In Fig. 8, which gives a front view of the instrument, the satellites
are so placed that each is turned \(60^{\circ}\) farther round in its
socket than the one behind it. As there are thirty-six satellites, this
process will bring us back to our starting-point after six revolutions
of the direction of the arm of the satellite; and therefore, as we
have gone round the ring once in the same direction, the arm of the
satellite will have overtaken the radius of the ring five times.</p>

<figure class="figleft width500" id="i_558" style="width: 200px;">
<img src="images/i_558.jpg" width="200" height="197" alt="A simple
geometric diagram showing two concentric circles, with the outer
circle's perimeter lined with small evenly spaced peg-like marks or
notches.">
<figcaption class="caption">
<p>Fig. 9.</p></figcaption>
</figure>

<p>Hence there will be five places where the satellites are beyond their
mean distance from the centre of the ring, and five where they are
within it, so that we have here a series of five undulations round the
circumference of the ring. In this case the satellites are crowded
together when nearest to the centre....</p>

<p>Now suppose the cranked axle C to be turned, and all the small cranks
K to turn with it, as before explained, every satellite will then be
carried round on its arm and in the same direction; but, since the
direction of the arms of different satellites is different, their
phases of revolution will preserve the same difference, and the
system of satellites will still be arranged in five undulations, only
the undulations will be propagated round<span class="pagenum" id="Page_513">[Pg 513]</span> the ring in the direction
opposite to that of the revolution of the satellites.</p>

<hr class="r5">

<p>If the satellites are arranged as in Fig. 8, where each is more
advanced in phase as we go round the ring, the wave will travel in the
direction opposite to that of rotation, but if they are arranged as in
Fig. 9, where each satellite is less advanced in phase as we go round
the ring, the wave will travel in the direction of rotation.</p>

<hr class="r5">

<p>We may now show these motions of the satellites among each other,
combined with the motion of rotation of the whole ring. For this
purpose we put in the pin P, so as to prevent the crank axle from
turning, and take out the pin Q, so as to allow the wheel R to turn. If
we then turn the wheel T, all the small cranks will remain parallel to
the first crank, and the wheel R will revolve at the same rate as T.
The arm of each satellite will continue parallel to itself during the
motion, so that the satellite will describe a circle whose centre is at
a distance from the centre of R, equal to the arm of the satellite, and
measured in the same direction. In our theory of real satellites each
moves in an ellipse, having the central body in its focus, but this
motion in an eccentric circle is sufficiently near for illustration.
The motion of the waves relative to the ring is the same as before. The
waves of the first kind (Fig. 8) travel faster than the ring itself,
and overtake the satellites, those of the fourth kind (Fig. 9) travel
slower and are overtaken by them.</p>


<p>This paper was characterised by the late Astronomer Royal as “one of
the most remarkable applications of Mathematics to Physics that I have
ever seen.”</p>


<p class="space-above2">
6. But notwithstanding the investigations above referred to, and many
other original papers on almost every branch of Physical Science, it is
for his researches in Electricity and in Molecular Science that Maxwell
stands pre-eminent among the men of science of the present century.
After taking his degree in 1854, Maxwell read through Faraday’s
Experimental researches, a course which he always recommended his
students to follow. In Faraday he found a mind essentially of his own
type. Thoroughly conversant himself with the Theory of Attractions as
developed in Mathematical Treatises,<span class="pagenum" id="Page_514">[Pg 514]</span> and with the laws of electrical
action as illustrated by Sir William Thomson in his paper “on the
Uniform motion of heat in homogeneous solid bodies, and its connection
with the Mathematical Theory of Electricity,” a paper published in
the <i>Cambridge Mathematical Journal</i>, February 1842, and “on a
Mechanical representation of Electric, Magnetic, and Galvanic Forces,”
published in the <i>Cambridge and Dublin Mathematical Journal</i>,
January 1847, Maxwell saw the connection between Faraday’s point of
view and the method of research adopted by the Mathematicians. He used
to say that he had not a good nose to smell heresy, but whatever was
good and true Maxwell would detect beneath the mass of misconception,
or even falsehood, which had gathered round it, and which caused
its rejection by nearly every one else without inquiry. Faraday’s
conception of a medium he adopted as a guide throughout his electrical
researches.</p>

<p>Until the sixteenth century all that was known respecting electricity
was the one fact that amber when rubbed possesses the power of
attracting light bodies. This property was shown (<i>Physiologia
Nova</i>, 1600) to be possessed by a variety of substances by Dr.
Gilbert of Colchester, who was Physician to Queen Elizabeth, and who
may be regarded as the founder of the Science of Electricity. From
this time rapid strides were made in the experimental portion of the
science, and the law according to which the attraction or repulsion
between two small bodies charged with electricity varies with the
charges, and the distance between them, was determined by Coulomb with
his torsion balance, an instrument whose value to the experimental
investigator can hardly be over-estimated. But it is to Cavendish
(1771-1781) that we are mainly indebted for the foundation of the
Mathematical Theory of Electricity, and for the highest experimental
evidence of the law of electrical action. As the preparation for
the press of <i>The Electrical Researches of the Honourable Henry
Cavendish</i> was the last of Maxwell’s contributions to science,
the work being published only a few weeks before his death, we shall
again have to refer to Cavendish’s investigations, and need only state
that his experiments proved<span class="pagenum" id="Page_515">[Pg 515]</span> conclusively, and in the best possible
manner as far as the instruments at his disposal would allow, that
the attraction or repulsion between two small charged bodies varies
directly as the product of their charges, and inversely as the square
of the distance between them, so that the law of electrical action is
the same as Newton’s law of gravitation, except that the stress between
similarly charged bodies is repulsive, and that between dissimilarly
charged bodies attractive. After Cavendish’s time comparatively
little was added to the theory of statical electricity, if we except
the elaborate mathematical investigations of particular problems by
Poisson, and the papers of George Green, which until recently were read
by few, and appreciated by only two or three, until Faraday took up the
subject. Most of Cavendish’s work remained unpublished and unknown,
and some of his results were independently obtained by Faraday. It is
difficult to conceive what would have been the effect on Faraday’s
mind of perusing Cavendish’s “thoughts on electricity,” as well as his
own accounts of his experiments. Perhaps it is best for the world that
Faraday was left to work and think on independent lines; certainly it
has been a boon to Mathematicians and Physicists alike that Maxwell has
appeared to expound and develop, if not to perfect, the work of both.</p>

<p>The mathematical theory of attractions had, prior to the time of
Faraday, attained a very high degree of development in the hands
of Laplace, Lagrange, Poisson, and others, and could be applied to
the solution of many very interesting problems in electricity. But
Faraday was not satisfied with the hypothesis of <i>direct action at a
distance</i> between charges of electricity, and held that there must
be some mechanism by which electric and electromagnetic actions can be
communicated from point to point. Not all the arguments by which he
supported this view are conclusive, for the force upon an electrified
body and the induced electrification of any conductor will be the same
whether we adopt the hypothesis of direct action at a distance or of
the transmission of electrical action in lines, straight or curved,
through an<span class="pagenum" id="Page_516">[Pg 516]</span> intervening medium. But any view, whether the arguments in
its favour are conclusive or not, is of value if it lead us to inquire
more closely into the mechanism by which a phenomenon is brought about;
and thus Faraday’s conception of lines of force, transmitted through
a medium, and exerting tension and pressure wherever they are to be
found, are of more value as an instrument of mental research than
Weber’s Theory of Electro-magnetism, however perfect the latter may be
from a mathematical point of view.</p>

<p>The following quotation, from the preface to the <i>Electricity and
Magnetism</i>, gives Maxwell’s views of Faraday in his own words:—<a id="FNanchor_256" href="#Footnote_256" class="fnanchor">[256]</a></p>

<div class="blockquot">

<p>Before I began the study of electricity I resolved to read no
mathematics on the subject till I had first read through Faraday’s
<i>Experimental Researches on Electricity</i>. I was aware that there
was supposed to be a difference between Faraday’s way of conceiving
phenomena and that of the mathematicians, so that neither he nor they
were satisfied with each other’s language. I had also the conviction
that this discrepancy did not arise from either party being wrong. I
was first convinced of this by Sir William Thomson, to whose advice and
assistance, as well as to his published papers, I owe most of what I
have learned on the subject.</p>

<p>As I proceeded with the study of Faraday, I perceived that his method
of conceiving the phenomena was also a mathematical one, though not
exhibited in the conventional form of mathematical symbols. I also
found that these methods were capable of being expressed in the
ordinary mathematical forms, and these compared with those of the
professed mathematicians.</p>

<p>For instance, Faraday, in his mind’s eye, saw lines of force traversing
all space where the mathematicians saw centres of force attracting at
a distance; Faraday saw a medium where they saw nothing but distance;
Faraday sought the seat of the phenomena in real actions going on in
the medium, they were satisfied that they had found it in a power of
action at a distance impressed on the electric fluids.</p>
</div>

<p>Suppose a small positively electrified body to start from a point close
to a positively electrified surface, and suppose<span class="pagenum" id="Page_517">[Pg 517]</span> it to move always
in the direction in which it is urged by the force acting on it, it
will, of course, be repelled by the surface, and will move away along
some path straight or curved, and will continue to move indefinitely,
the force diminishing as it proceeds, unless it meet with a negatively
electrified surface, which will attract it, and coming into contact
with this surface its career will terminate. The path traced out
by such a small electrified body constitutes Faraday’s <i>line of
force</i>, which is therefore a line whose direction at any point is
that of the resultant force at that point. Such lines of force always
proceed from positively electrified surfaces, and terminate upon
negatively electrified surfaces; or, failing this, they must proceed
to infinity. Lines of force proceeding from a positively electrified
body placed in a room, unless there be other negatively charged bodies
in the neighbourhood, will in general terminate upon the walls, floor,
and ceiling of the room, or upon objects in the room in electrical
communication with these. Faraday thus conceived the whole of the space
in which electrical force acts to be traversed by lines of force which
indicate at every point the direction of the resultant force at that
point. But Faraday went further than this: he conceived the notion
of causing the lines of force to represent also the <i>intensity</i>
of the force at every point, so that when the force is great the
lines might be close together, and far apart when the force is small;
and since the force in the neighbourhood of a small charged body is
proportional to the charge, he endeavoured to accomplish this object by
drawing from every positively electrified surface a number of lines of
force proportional to its charge, and causing a similar number of lines
of force to terminate in every negatively electrified surface. In a
paper entitled “On Faraday’s Lines of Force,” read before the Cambridge
Philosophical Society on December 10th, 1855, and February 11th, 1856,
Maxwell showed that if a system of lines could be drawn according to
Faraday’s method, then, in virtue of the law of electrical action being
that of the inverse square of the distance, the number of lines of
force passing through a unit area of any surface, drawn perpendicular<span class="pagenum" id="Page_518">[Pg 518]</span>
to the direction of the force, is proportional to the magnitude of
the force in the neighbourhood, and that the number of lines passing
through the unit area of any other surface is proportional to the
component of the force at right angles to that surface. Maxwell
therefore imagined the positively electrified surfaces from which the
lines started to be divided into areas, each containing one unit of
electricity, and lines of force to be drawn through every point in
each bounding line. These lines therefore divide the whole of space
into “unit tubes,” whose boundaries are lines of force, and Maxwell
showed that, in virtue of “the law of inverse squares,” the force at
any point in any direction is inversely proportional to the area of the
section of the unit tube of force made by a plane perpendicular to that
direction. Maxwell further showed that on the negatively electrified
surface upon which these tubes terminate, each tube will enclose one
unit of negative electricity, and consequently, if a metallic surface
be introduced so as to cut the lines of force, the surface being placed
at right angles to the tube, a unit of negative electricity will be
induced on each portion of the surface contained within the trace of
a tube of force; and hence, in any isotropic medium, these unit tubes
of force are also <i>unit tubes of induction</i>. If, therefore, a
system of tubes of force be drawn in connection with any electrified
system, and in accordance with this plan, the whole of the space in
which the force acts will be divided into tubes each originating from
a unit of positive electricity and terminating upon a unit of negative
electricity, while the direction of the force at any point will be
indicated by that of the tube, and the magnitude of the force will
be inversely proportional to the area of the cross section of the
tube. How, if the law of force had been any other than that of the
inverse square, and tubes had been drawn starting from an electrified
surface as above, and such that the area of any section of a tube is
inversely proportional to the force across the section, these tubes
would either leave spaces between them as they recede from the surface,
or would intersect one another; so that it is only for the law of
inverse squares that the system of<span class="pagenum" id="Page_519">[Pg 519]</span> tubes above described is possible.
Faraday pointed out that there is not only a tension exerted along each
line of force, but that the several lines exert a repulsion upon one
another, and Maxwell showed that a tension along the lines of force,
accompanied by an equal pressure in every direction at right angles to
these lines, is consistent with the equilibrium of the medium. Taking
an illustration from the flow of water in a river. Maxwell pointed out
that the stream lines or paths along which particles of water flow, are
analogous to lines of electric force, the velocity of the water being
analogous to the intensity of the force. If the river be supposed to
be divided into tubes, the boundaries of which are lines of flow, and
if these tubes be so drawn that unit volume of water passes across
a particular section of each tube in a second, then, if the flow be
steady, unit volume of water will flow across every section of each
tube in a second, since no water enters or leaves the tube except
at its ends. Such tubes may be called unit tubes of flow, and if no
tributaries enter the river there will be the same number of unit
tubes crossing each section of the river. Where the bed widens the
section of each tube increases, being always inversely proportional to
the velocity of the water, and hence the number of unit tubes of flow
which cut any unit of area in a cross section of the river will be
proportional to the velocity of the water in the neighbourhood. Such a
system of tubes, therefore, will represent both the direction of motion
and velocity of the water at every point, and will exactly correspond,
mutatis mutandis, with a system of unit tubes of electric force.</p>

<p>The following letter was addressed to Maxwell by Faraday on receiving a
copy of the paper on “Lines of Force:”—</p>

<div class="blockquot">

<p class="right">
<i>Albemarle Street, W., 25th March 1851.</i></p>

<p><span class="allsmcap">My dear Sir</span>—I received your paper, and thank you very much
for it. I do not say I venture to thank you for what you have said
about “Lines of Force,” because I know you have done it for the
interests of philosophical truth; but you must suppose it is work
grateful to me, and gives me much encouragement to think on. I was
at first almost frightened when I saw such mathematical force made
to bear upon the subject, and then<span class="pagenum" id="Page_520">[Pg 520]</span> wondered to see that the subject
stood it so well. I send by this post another paper to you; I wonder
what you will say to it. I hope however, that bold as the thoughts may
be, you may perhaps find reason to bear with them. I hope this summer
to make some experiments on the time of magnetic action, or rather on
the time required for the assumption of the electrotonic state, round
a wire carrying a current, that may help the subject on. The time
must probably be short as the time of light; but the greatness of the
result, if affirmative, makes me not despair. Perhaps I had better have
said nothing about it, for I am often long in realising my intentions,
and a failing memory is against me.—Ever yours most truly,</p>

<p class="right"><span class="allsmcap">M. Faraday.</span></p>

<p>Prof. C. Maxwell.</p>
</div>

<p>The paper, read before the Cambridge Philosophical Society, and
published in vol. <span class="allsmcap">X.</span> of their <i>Proceedings</i>, is
confessedly only a translation of Faraday’s ideas into mathematical
language, with illustrations and extensions, and it makes no attempt
at explaining the nature of the action in the dielectric, or the
mechanism by which the observed effects are brought about. About
five years later, in a series of three papers communicated to the
<i>Philosophical Magazine</i> in 1861 and 1862, Professor Maxwell gave
a simple sketch of a system of mechanism, capable of producing not only
the electrostatic effects above alluded to, but also of accounting for
magnetic attraction, the action of electric currents upon one another,
and upon magnets, and electromagnetic induction; but before giving an
account of these papers it will be necessary briefly to mention the
principal phenomena, an explanation of which was required.</p>

<p>The ordinary phenomena of magnetism, including the attraction between
dissimilar and the repulsion between similar poles, as well as the
still more familiar phenomena of the attraction of soft iron by a
magnetic pole, are too well known to require more than a passing
mention. Coulomb showed that the law of inverse squares obtained
equally for magnetic repulsions as for electrical, so that the stress
between two magnetic poles is proportional to the product of the
strengths of the poles and inversely proportional to the square of the
distance between them, provided the steel of<span class="pagenum" id="Page_521">[Pg 521]</span> which the magnets are
composed is sufficiently hard to prevent the actions of the magnets on
each other altering the strengths of their poles.</p>

<p>If a sheet of paper he supported horizontally above the poles of a
magnet, and iron filings be sprinkled over the paper, each filing
becomes magnetised by induction in the direction of the resultant
magnetic force at the point where it is situated, and if the paper
be gently tapped so as to overcome friction, the mutual attraction
of the unlike poles in the filings causes them to adhere together in
threads or filaments, the North pole of one filing attaching itself
to the South pole of a neighbouring filing, and so on, the points of
attachment all lying along a line of force. In this way the filings
form a graphic representation of the lines of magnetic force, and
it was this experiment which first suggested to Faraday the idea of
the physical existence of such lines; and as he found it difficult
to conceive of curved lines of force being due to “direct action at
a distance” (Exp. Res. 1166), he considered that there must be some
medium which is the vehicle both of magnetic and electric forces,
and that such forces are propagated from particle to particle of the
medium. Faraday also supposed that the same medium might serve as
the vehicle for the transmission of light. The investigation of the
properties of the medium necessary to account for observed electric
and magnetic actions, the explanation of these actions, and the
determination of the velocity of light from purely electro-magnetic
considerations on the hypothesis of the existence of a such a medium
constitute Maxwell’s greatest contribution to electrical science.</p>

<p>The action of an electric current upon a magnet was first observed by
Œrsted. It is said that he made many attempts in his laboratory to
discover an action between a magnet and a wire conveying a current, but
in all his attempts he carefully placed the wire at right angles to the
magnetic needle, and could detect no effect whatever. On attempting
to repeat the experiment in the presence of his class he placed the
wire parallel to the needle, and the latter immediately swung round
and ultimately came to rest nearly at right<span class="pagenum" id="Page_522">[Pg 522]</span> angles to the wire.
Whenever the North pole (<i>i.e.</i> the <i>North seeking</i> pole)
of a magnet is brought near to a wire conveying a current, the pole
tends to go round the wire in a certain direction, while the South (or
South seeking) pole of the magnet tends to go round the wire in the
opposite direction, and hence if the magnet be free to turn about its
centre, the magnet will come to rest at right angles to the wire. Many
<i>memoriœ technicœ</i> have been given for determining the manner in
which a magnet will behave in the neighbourhood of a current. Maxwell’s
rule was as follows:—Suppose a right-handed screw to be advancing in
the direction of the current, and of necessity rotating as it advances,
as if it were piercing a solid. The North pole of a magnet will always
tend to move round the wire conveying the current in the direction in
which such a screw rotates, while the South pole will tend to move in
the opposite direction.</p>

<p>We may thus suppose every wire conveying a current to be surrounded
by lines of magnetic force which form closed curves around the wire,
and the direction of the force is that in which a right-handed screw
would rotate if advancing with the current. In the case of a straight
wire of infinite length, these curves are of course circles. Since
action and reaction are equal and opposite, it follows that whatever
be the mechanical force exerted by a current upon a pole of a magnet,
the latter will always exert an equal and opposite force upon the wire
or other conductor conveying the current. Many experiments have been
devised to show this. Maxwell used to illustrate it in a very simple
way. Having attached a piece of insulated copper wire to a small round
plate of copper, he placed the plate at the bottom of a small beaker.
A disc of sheet zinc was then cut of such size as to fit loosely in
the beaker, a small “tail” of zinc being left attached to it; this was
bent up and united to the copper wire above the top of the beaker,
while the plate of zinc was suspended in a horizontal position an inch
or two above the copper plate. The beaker was filled up with dilute
sulphuric acid and placed on one pole of an electromagnet, some sawdust
or powdered resin being placed in the liquid<span class="pagenum" id="Page_523">[Pg 523]</span> to show its movements.
On exciting the magnet the liquid rotated in one direction, and on
reversing the polarity of the magnet the direction of rotation was
reversed. If the plates be suspended by a string, so that they can
readily turn round in the beaker about a vertical axis, the action of
the magnet on the current in the vertical wire will cause the plates to
turn always in the direction opposite to that of the liquid.</p>

<p>The laws of the mechanical action of conductors conveying currents upon
magnets and upon each other were investigated by Ampère in a series
of experiments which were at once conclusive and exhaustive. These
experiments were alluded to in the highest terms by Professor Maxwell.
Any account of them would be out of place here, and we only refer to
them as furnishing the experimental evidence for the statements which
follow.</p>

<p>We have already described the manner in which magnetic lines of
force may be supposed to surround a wire conveying a current. Now
let such a wire be bent into a closed curve or ring-which need not
necessarily be circular. The lines of force, which themselves form
closed curves around the wire, will all pass in the same direction
through the ring formed by the wire conveying the current, as if they
were strung upon the wire, and hence the North pole of a magnet will
tend to pass through the ring in the direction of the lines of force;
and a moment’s reflection will show that this direction is that in
which a right-handed screw would advance if rotating in the direction
of the current in the wire. Hence, if the North pole of a magnet be
brought near to such a small closed circuit, on the one side it will
be attracted and tend to pass through the circuit; on the other side
it will be repelled. The South pole of a magnet will be acted upon
in precisely the opposite manner. Hence if a small magnetic needle
be suspended within a coil of wire conveying a current, it will tend
to set itself at right angles to the plane of the coil. Such an
arrangement constitutes a galvanometer.</p>

<p>Now suppose that we have a small disc of steel of the same size and
shape as the ring formed by the wire, and that this disc is magnetised
so that one side is a north pole<span class="pagenum" id="Page_524">[Pg 524]</span> and the other a south pole. Such a
disc will act upon external magnets in the same manner as the current
if it he magnetised, so that a right-handed screw rotating with the
current would enter at the south face and emerge at the north face.
Such a magnetised disc is called a <i>magnetic shell</i>, and it
will of course he acted upon by a magnet with forces exactly equal
and opposite to those with which the magnet is acted upon by it. The
magnetic lines of force proceeding from a circuit conveying an electric
current are therefore the same as would proceed from the magnetic shell
above described, the strength of the magnetisation being properly
adjusted; in other words, the magnetic field around such a circuit is
the same as that surrounding the magnetic shell, and hence it follows
that two circuits, each conveying electric currents, will act upon one
another in the same way as two magnetic shells whose circumferences
coincide with the wires, and which are magnetised as above described.</p>

<p>Now if the shells be parallel and magnetised in the same direction,
they will have their opposite faces presented towards each other,
and will attract one another. If they are magnetised in the opposite
directions they will repel one another. Similarly, two parallel
circuits will attract one another if the currents be passing in the
same direction in both, and will repel one another if they be going in
opposite directions. Also two parallel wires, which may be considered
as parts of such circuits, will attract one another when the currents
in them are going in the same direction, and repel one another if they
are going in the opposite directions. Maxwell’s rule for determining
the manner in which a circuit conveying a current will behave in the
presence of other currents or of magnets is a very simple expression
of Faraday’s results. Defining the <i>positive</i> direction through a
circuit as that in which a right-handed screw would advance if rotating
with the current, he enunciated the rule thus:—</p>

<p><i>If a wire conveying a current be free to move in a magnetic field
it will tend to set itself so that the greatest possible<span class="pagenum" id="Page_525">[Pg 525]</span> number of
lines of magnetic force may pass through the circuit in the positive
direction.</i></p>

<p>Since the magnetic field may be produced either by magnets or by
electric currents themselves, as above described, this rule combined
with the principle that action and reaction are equal and opposite will
serve to determine the character of the action either upon circuits
conveying currents or upon magnets in every possible case which may
arise, and, in fact, embodies the magnificent results of Ampère’s
investigations in this subject.</p>

<p>Previously to the experiments of Faraday the <i>induction</i> of
electric currents was unknown. The principal phenomenon depending upon
this action, which had been observed, and of which no satisfactory
explanation had been offered, was that of Arago’s rotating disc. In
this experiment a disc of copper was made to rotate rapidly in its own
horizontal plane above a compass needle, when the needle was observed
to follow the disc and rotate on its vertical pin. This experiment
was subsequently repeated by Sir John Herschel and Mr. Babbage, who
employed discs of various substances, and found that it was only when
the discs were good conductors of electricity that Arago’s result was
obtained. Faraday, in the first series of his Experimental Researches,
describes an experiment in which a copper disc was made to rotate
between the poles of an electro-magnet, while one electrode of a
galvanometer was connected with the axis of the disc, and the other
with a wire which was held in contact with the edge of the disc, which
edge was amalgamated to secure a good connection. On spinning the
disc a current was immediately obtained, the direction of which was
reversed with that of the rotation. This experiment may be regarded as
the starting-point of the dynamo machines of Wilde, Gramme, Siemens,
and others, which seem destined to play so important a part in the
civilised life of the future.</p>

<p>Faraday also showed that when two circuits are placed near to
one another, if a current be started in one circuit there is an
instantaneous current produced in the <i>opposite<span class="pagenum" id="Page_526">[Pg 526]</span> direction</i> in
the neighbouring circuit, while on stopping the “primary” current a
transient current in the same direction as the primary occurs in the
other or “secondary” circuit. This experiment was the origin of the now
well-known induction coil. Again, when the current was flowing steadily
in the primary circuit, if the secondary circuit were brought nearer
to it, a current was <i>induced</i> in the secondary in the direction
opposite to that in the primary, and continued during the approach of
the circuits. On removing the secondary circuit a transient current was
set up in the same direction as that in the primary.</p>

<p>We cannot here spare space to trace the development of the laws of
induced currents. The character of the action may in all cases be
inferred from the very concise statement of Lenz, generally quoted as
Lenz’s law, and which may be thus expressed:—</p>

<p>If a conductor move in a magnetic field, an electromotive force will be
induced in the conductor which will tend to produce a current in such
direction that the mechanical force upon the conductor tends to oppose
its motion.</p>

<p>This law, taken in conjunction with the statements made above
respecting the mechanical action in a magnetic field upon a conductor
conveying a current, serves to determine the character of the induced
current whenever a conductor moves in the neighbourhood of magnets
or electric currents. Moreover, the starting of a current in a
neighbouring circuit must have the same effect upon the wire as if the
conductor were suddenly brought from an infinite distance into the
position which it actually occupies. Hence Lenz’s law will apply to
every case of induced currents.</p>

<p>Maxwell’s statement expresses the laws of induced currents
quantitatively as well as qualitatively. It is as follows:—</p>

<p><i>Whenever the number of lines of magnetic force passing through a
closed circuit is changed there is an electro-motive force round the
circuit represented by the rate of diminution of the number of lines of
force which pass through the circuit in the positive direction.</i></p>

<p><span class="pagenum" id="Page_527">[Pg 527]</span></p>

<p>If, then, the number of magnetic lines of force passing through a
circuit is diminished, there will be an electro-motive force round the
circuit in the direction in which a right-handed screw would rotate
if advancing along the lines of force; a line of force being always
supposed to be drawn in the direction in which a north magnetic pole
tends to move along it. If the number of lines of force passing through
the circuit is increased, the electro-motive force will be in the
opposite direction. This law can be deduced from that which expresses
the mechanical action upon a circuit conveying a current when placed
in a magnetic field together with the principle of the conservation of
energy. That it may be numerically true all the quantities involved
must be expressed in terms of the electromagnetic system of units.</p>

<p>The telephone is a beautiful example of the application of this law.
Every movement of the iron disc in front of the pole of the magnet
alters the number of magnetic lines of force passing through the
coils of wire surrounding the pole; and hence induces a current in
one direction or the other in the coil, which current, increasing or
diminishing the strength of the magnetism in the receiving telephone,
causes a corresponding motion in the iron disc of the receiver, which
therefore emits sounds similar to those incident upon the receiving
instrument.</p>

<p>From what has been stated it will appear that the motion of a
conductor will produce a current therein only when the conductor
is moving in a <i>magnetic field</i>, that is, a portion of space
through which magnetic lines of force pass. Faraday supposed that
a conductor under these circumstances was thrown into a peculiar
condition, which he termed “the electrotonic state,” and that a current
was induced whenever this state varied. Maxwell showed that this
electrotonic state, on the variations of which the induced current
in a circuit depends, corresponds to the number of magnetic lines of
force which pass through the circuit. Because every change in this
quantity involved the action of electromotive force, its relations
to electromotive force being the same as those of momentum to force
in dynamics, he called the<span class="pagenum" id="Page_528">[Pg 528]</span> quantity itself <i>electromagnetic
momentum</i>. Maxwell’s conception of the physical nature of this
quantity will be described presently.</p>

<p>The determination of the laws of self-induction in electric currents is
another of Faraday’s many contributions to electrical science. After
one of the Friday evening lectures at the Royal Institution, a certain
Mr. Jenkin informed Faraday that when he broke the connection of the
circuit in his electromagnet by separating two pieces of wire which
he held in his hands, he felt a smart shock. Faraday said that this
was the only suggestion, out of a very great number, made to him by
ordinary members of a popular audience which ever led to any result. On
investigating the matter, Faraday found that when a current is flowing
in a coil of wire if the battery be removed there is a tendency for the
current to continue after the removal of the battery, and that this
tendency is increased by increasing the number of turns of wire in the
coil, and still more so by inserting soft iron in the centre of the
coil. This tendency does not depend so much on the length of the wire
as upon the relative positions of its parts, and if the wire be first
doubled and then wound into a coil the tendency disappears. If a few
Grove’s cells send a current through a short straight piece of wire and
the circuit be broken a very feeble spark will be seen on breaking, but
if a large electromagnet be introduced into the circuit a very much
brighter spark will appear on breaking contact, though the current sent
by the battery is feebler. Thus, when a current flows in such a coil
its behaviour reminds us of that of water flowing in a pipe which, when
an obstruction is suddenly introduced so as to stop the flow, exerts
an enormous pressure for a short time upon the pipe and obstruction,
in virtue of the momentum which the water has acquired; but that the
action is not due to any momentum actually possessed by the moving
electricity is shown by the fact that it depends on the configuration
of the wire. This property of a coil is called self-induction. If the
poles of an electro-magnet be joined by a wire of great resistance as
well as by the battery, when the battery is removed a<span class="pagenum" id="Page_529">[Pg 529]</span> considerable
current will flow through the wire. This current Faraday called
the <i>extra</i>-current. It is more generally referred to as the
self-induction current.</p>

<p>A similar action takes place when connection is made between a battery
and a coil. The current does not at once acquire its full value, but
for a short time goes on steadily increasing; the self-induction
of the coil causing it to behave as if the current in it possessed
considerable mass, which has in the first instance to be put into
motion. All these actions are immediate consequences of the law of
induced currents stated on p. 526.</p>

<p>There is a well-known experiment of Faraday in which a specimen of
his heavy glass, or borate of lead, was placed between the poles of a
powerful electro-magnet and a beam of plane polarised light was passed
through the glass in the direction of the magnetic force. Faraday
found that when the light passed from the north to the south pole of
the magnet the plane of polarisation was turned through an angle in
the same direction as a right-handed screw would rotate if piercing
a solid and advancing with the light. When the light passed in the
opposite direction, the rotation of the plane of polarisation was in
the same direction with respect to the magnet, and therefore reversed
with respect to the path of the light. In this respect the heavy glass
under the influence of the magnet behaved differently from a solution
of sugar which always turns the plane of polarisation of the light in
the same direction with reference to its direction of transmission.
This was the first experiment which showed any relation between light
and magnetism, and indicated that the medium which serves as the
vehicle of light—the luminiferous ether—must at least be affected by
the presence of magnetic force, though the fact that the presence of
ponderable matter is necessary to the production of this rotation, and
that the direction of the rotation depends on the nature of the matter,
renders it doubtful how far magnetic force affects the ether directly.</p>

<p>All transparent solids and liquids exhibit the same action on light in
different degrees. If a tube of water with plate<span class="pagenum" id="Page_530">[Pg 530]</span> glass ends be placed
within a coil of wire through which an electric current is passing,
and plane polarised light be transmitted through the tube, the plane
of polarisation will be turned through an angle in the direction in
which the current circulates, and this angle will be proportional to
the current. Verdet showed that in the case of a transparent (para-)
magnetic substance the rotation is in the opposite direction to that of
the current.</p>

<p>The curious effect of a magnet upon the luminous discharge in a vacuum
tube and the recent experiments of Dr. Kerr, may indicate other
relations between light and electricity and magnetism.</p>

<p>Having thus very briefly referred to the principal phenomena of
magnetism and electromagnetism, we may proceed to give a short
explanation of the medium or mechanism by which Maxwell accounted for
these phenomena and their mutual interdependence.</p>

<p>From the well-known laws of the propagation of light, Maxwell assumed
“as a datum derived from a branch of science independent of that with
which we have to deal, the existence of a pervading medium, of small
but real density, capable of being set in motion, and of transmitting
motion from, one part to another with great, but not infinite,
velocity.” Inasmuch as this medium can transmit undulations with finite
velocity, it follows that it possesses a property analogous to mass, so
that its motion implies kinetic energy; in addition to elasticity, in
virtue of which its deformation implies potential energy.</p>

<p>It is well known that if a body rotate about a fixed centre there will
be a tension along any radius drawn in the plane of rotation. The form
which the earth would assume under the action of gravity only, if there
were no rotation, would be that of a sphere. The diurnal rotation tends
to cause the polar axis to contract and the equatorial diameter to
increase; and this action would go on indefinitely were it not that at
a certain early stage it is balanced by the attraction of gravitation,
and thus the earth assumes a nearly spherical form, in which the polar
axis is shorter than the equatorial diameter.</p>

<p><span class="pagenum" id="Page_531">[Pg 531]</span></p>

<p>Referring again to the case of the earth, it is demonstrable from
the fundamental laws and principles of dynamics that if matter were
conveyed from the equatorial regions to the poles, and there deposited
so as to lengthen the polar axis at the expense of the equatorial
diameter, the rate of rotation of the earth would be increased and
the length of the day would be diminished; while if the earth became
more oblate its velocity of rotation would diminish. In fact, if any
body be in rotation, and be unacted upon by external forces, or if the
forces acting upon it be such as not to affect its rotation, and if the
system be altered in shape by internal stresses or otherwise, so that
its <i>moment of inertia</i> about the axis of rotation is increased,
the angular velocity will be diminished and, in the case of a sphere
becoming an oblate spheroid, the velocity at the circumference will
also be diminished, while if the moment of inertia be diminished, the
reverse effect takes place.</p>

<p>How Maxwell supposed that any medium which can serve as the vehicle
of magnetic force consists of a vast number of very small bodies
or <i>cells</i> capable of rotation, and which we may consider to
be spherical or nearly so when in their normal condition, until we
have reason to believe them to be of some other form. When magnetic
force is transmitted by the medium, these bodies are supposed to be
set in rotation about the lines of magnetic force as axis, and with
a velocity depending on the intensity of the force. For the sake of
fixing our ideas he supposed the rotation to be in the direction in
which a right-handed screw would turn if it advanced in the direction
of the force. We thus have the magnetic field filled with “<i>molecular
vortices</i>” all rotating in the same direction about the lines of
magnetic force as axes. As we have seen, these vortices will tend to
contract in the direction of their axes of rotation, and to expand at
right angles to this direction, so that if initially they are elastic
spheres, they will tend to become oblate spheroids like the earth.
This tendency will involve a <i>tension</i> in the medium along the
lines of force, these being the lines along which contraction tends
to take place, and this will be accompanied by an equal pressure in<span class="pagenum" id="Page_532">[Pg 532]</span>
every direction perpendicular to the lines of force, on account of the
tendency of the vortices to expand equatorially.</p>

<p>Now suppose that we have a north magnetic pole and a south magnetic
pole placed near to one another. Lines of force will proceed from the
North pole, generally in curved lines, to the South pole. The space in
the neighbourhood of the poles will be filled with molecular vortices,
which will be most energetic along the line joining the poles, and
the velocities of the vortices will diminish as we pass into weaker
portions of the field. The tension along the lines of force, tending to
draw the North and South poles together, affords sufficient explanation
of the apparent attraction between the poles; the kinetic energy
of the molecular vortices accounts for the potential energy of the
separated poles, which we thus suppose to be really kinetic energy,
though possessed by the <i>medium</i> between the apparently attracting
bodies and not by the bodies themselves. (Perhaps all examples of
so-called potential energy we shall some day find to be really kinetic
energy possessed by a medium with the properties of which we have been
hitherto unacquainted.) When the poles approach one another, the field
which is occupied by the vortices is diminished in extent, and though
the velocity of the vortices is increased, the whole energy of the
field is diminished, and the difference is expended in work done upon
the approaching magnets. If the poles are of equal strength, and can
come absolutely to coincide, the field is destroyed, all the vortices
come to rest, and the energy possessed by them is all expended in work
done on the magnets.</p>

<p>If two like poles, north poles for example, be placed near to one
another, the lines of force proceeding from the one, instead of going
to the other, will be turned aside, and if the poles be of equal
strength, a plane bisecting, at right angles, the line joining the
poles, will separate the lines of force due to the one from those due
to the other, so that no line will cut the plane (Fig. 10). The lines
of force thus passing nearly parallel to one another, the pressure
exerted by the molecular vortices in every direction at right angles to
the lines of force will cause an apparent repulsion between the poles.</p>

<p><span class="pagenum" id="Page_533">[Pg 533]</span></p>

<p>To account for the transmission of rotation <i>in the same
direction</i> from one molecular vortex to the next. Maxwell supposed
that there exists between them a number of extremely minute spherical
bodies which roll, without sliding, in contact with the surfaces of the
vortices.</p>

<figure class="figcenter width500" id="i_579" style="width: 300px;">
<img src="images/i_579.jpg" width="300" height="244" alt="A symmetrical
diagram within a rectangular frame showing two dark central points,
each surrounded by radiating curved lines fanning outward in a
field-line pat…A symmetrical diagram within a rectangular frame showing
two dark central points, each surrounded by radiating curved lines
fanning outward in a field-line pattern, divided by dashed horizontal
and vertical axes.">
<figcaption class="caption">
<p>Fig. 10.</p></figcaption>
</figure>

<p class="nind">
These bodies serve the same purpose as “idle wheels” in machinery,
which, coming between a driver and follower, transmit the motion
of the former to the latter unchanged in direction. These minute
spherical particles Maxwell supposed to constitute electricity.
They roll upon the cells or vortices as if the surfaces in contact
were <i>perfectly</i> rough, or provided with teeth gearing into
one another, and thus, whatever forces may be applied, sliding is
impossible. What we ordinarily consider as molecules of matter are
supposed to be very large compared with the molecular vortices, and
therefore <i>à fortiori</i> with the particles of electricity. In an
insulator, or dielectric, it is supposed that the electric particles<span class="pagenum" id="Page_534">[Pg 534]</span>
are unable to pass from molecule to molecule of the body, but in a
conductor they can do so, the passage, however, being opposed by
friction, so that heat is generated and energy dissipated in the
transfer.</p>

<p>Now suppose that we have a current of electricity flowing through a
conducting wire. Let us confine our attention at first to the central
line of particles. These, as they flow, will cause all the cells they
touch to rotate about axes perpendicular to the line of flow, so that
the stream of particles will be surrounded by rings of vortices. Each
ring of vortices will behave like an indiarubber umbrella ring when
we pass it over the finger or the stick of an umbrella. Instead of
sliding into its place it proceeds by a rolling motion, continually
turning itself inside out, as it were, each circular section of the
ring or tore rotating about its own centre. Now this motion of the
vortices would tend to cause the layer of electric particles outside
them to move in the opposite direction to the central stream, and this
tendency, to which we shall again refer when we speak of induction,
can only be overcome by causing the next ring of cells to rotate in
the same direction as the inner ring, when the particles may simply
roll round between the coaxial rings of vortices without moving
backwards or forwards. But if the layer of particles be compelled to
move forwards like the inner stream the layer of vortices surrounding
it must rotate more rapidly that the layer within it, and so on, each
successive shell of vortices rotating more rapidly until we reach
the extreme layer contained within the conducting wire. The shell of
vortices which bounds the conductor must by the same mechanism set up
molecular vortices in the dielectric, the motion being communicated in
ever-widening circles to an unlimited distance. It does not follow that
this communication of motion is instantaneous. The cells may consist
of elastic material which does not assume its final state of motion as
soon as the tangential action of the electric particles is exerted upon
it, but begins at first to undergo a deformation, the time taken to set
up a given rotation in each depending on its density and elasticity.<span class="pagenum" id="Page_535">[Pg 535]</span>
Hence electro-magnetic induction, which is the name given to the action
we are now discussing, will be propagated through space with a finite
velocity, but of this we must say more hereafter.</p>

<p>From what has been said it appears that when a steady (<i>i.e.</i>
constant) current is flowing in a wire, molecular vortices will be
set up in the surrounding dielectric, the axis of rotation of each
vortex being perpendicular to the plane passing through the wire and
the vortex. The axes about which the vortices turn will therefore
form circles surrounding the wire, while the vortices themselves will
constitute vortex rings, spinning with very great velocity in the same
manner as the indiarubber ring above referred to, or the rings of smoke
which are sometimes seen to emerge from a tobacco pipe. But the lines
about which the molecular vortices rotate are magnetic lines of force,
there being a tension in the medium along these lines, and a pressure
everywhere at right angles to them.</p>

<figure class="figcenter width500" id="i_581" style="width: 300px;">
<img src="images/i_581.jpg" width="300" height="174" alt="A simple
diagram showing parallel horizontal arrows labeled S on the left and N
on the right, with a small shaded circle labeled A positioned along the
central line.">
<figcaption class="caption">
<p>Fig. 11.</p></figcaption>
</figure>

<p class="nind">
Hence a straight line carrying an electric current will be surrounded
with magnetic lines of force, forming circles with their centres on
the axis of the wire, and since the direction of the magnetic force is
that in which a right-handed screw would advance if rotating with the
vortices, it follows that the direction of the magnetic force around
the wire will be that in which a right-handed screw would rotate if
advancing with the current. The medium will be subject to tension in
circles around the<span class="pagenum" id="Page_536">[Pg 536]</span> wire, and to pressure in planes passing through the
wire, reminding us of the cylinders of an Armstrong gun.</p>

<p>If the wire he bent the same will be true in kind, but the lines will
no longer be accurately circles. All the magnetic lines of force pass
through a closed circuit in the direction in which a right-handed
screw would advance if rotating in the direction of the current. Fig.
11, taken from the paper in the <i>Philosophical Magazine</i>, shows
the relations between the current, the lines of magnetic force, and
the direction of motion of the vortices, the arrows \(\mathrm{E}
\mathrm{E}^{\prime}\) representing the current, \(\mathrm{S N}\)
indicating the direction of the magnetic force, while the arrows
\(\mathrm{V} \mathrm{V}^{\prime}\) show the direction of rotation of
the vortices.</p>

<figure class="figcenter width500" id="i_582" style="width: 300px;">
<img src="images/i_582.jpg" width="300" height="153" alt="A technical
diagram showing a large circular loop labeled E and E' connected to a
rectangular battery or cell apparatus labeled Z and C on the right,
with a cluster of interlocking ring-shaped magnets labeled S, N, and V
on the left side.">
<figcaption class="caption">
<p>Fig. 12.</p></figcaption>
</figure>

<p>Now suppose a wire conveying a current to be placed in a magnetic field
at right angles to the lines of force. Let \(\mathrm{S N}\) (Fig.
12) represent the lines of force, \(\mathrm{A}\) the section of the
conductor, and let the current be travelling from the reader through
the paper. In the space immediately above the wire, the molecular
vortices due to the magnetic force originally in the field will be
rotating in the direction in which the current in \(\mathrm{A}\)
urges, them, while in the space below the conductor the reverse will
be the case. Hence the velocity of the vortices above the wire will be
increased by the current, while that of the vortices below the wire is
diminished. The pressure of the medium at right angles to the lines of
force will therefore be greater above the wire than below it, and the
wire will be urged downwards at right angles to the lines of force and
to its own direction.</p>

<p><span class="pagenum" id="Page_537">[Pg 537]</span></p>

<p>Again, suppose two parallel wires to be near together and to convey
currents in opposite directions. The strength of a current determines
the difference between the velocities of the molecular vortices on
opposite sides of it, the electric particles being related to the
vortices in the same way as a differential wheel in mechanism; but the
vortices on one side of a moving stream of electric particles may be
brought to rest if the velocity of those on the other side be doubled,
the current remaining the same though the electric particles themselves
will now have to spin round, but this makes no difference. Hence, when
parallel wires convey currents in opposite directions, the vortices
between them being made to spin in the same direction by both currents,
will rotate faster than those on the opposite sides of the wires, and
pressing as they do with force proportional to the squares of their
circumferential velocities, the wires will be pushed apart <i>as if</i>
they repelled one another.</p>

<p>When two parallel wires convey currents in the same direction, they
tend to make the cells in the space between them spin in opposite
directions, and the velocities of the molecular vortices there
will consequently be less than on the other side of the wires. The
pressure of the medium between the wires will therefore be less than
in the space beyond, and the wires will be pushed together as if they
attracted one another.</p>

<p>How, suppose that a current of electricity commences to flow in a wire.
Molecular vortices will be set up in the immediate neighbourhood of
the wire, and these vortices acting on the electric particles on the
other side of them, remote from the wire, will endeavour to set them
in motion in the direction opposite to the current in the wire. But if
the medium be a dielectric, the particles cannot be displaced through
a sensible distance. They will therefore be made to rotate and start
another and larger layer of vortices surrounding the wire, and so the
motion will be propagated as above explained. But suppose that at a
certain distance there is placed another wire parallel to the first,
and forming part of a closed circuit in which no current is flowing.
The<span class="pagenum" id="Page_538">[Pg 538]</span> particles of electricity in this wire will be acted on in the same
way as those in the dielectric, but meeting with very little resistance
to their motion along the wire, they find it easier to move through
the wire than at once to transmit the vortex motion to the elastic
bodies on the other side of them. But when a driver and follower are
connected by a differential wheel, if the follower he retarded only
by its own inertia, however small a resistance the differential wheel
may experience to its motion of translation it will at length cause
the follower to turn at the same rate as the driver, and will itself
cease to move. Hence the resistance of the conductor at length brings
the electric particles to rest, and causes them to communicate the
vortex motion to cells beyond them. Thus when a current is started in a
wire transitory currents in the opposite direction will be induced in
neighbouring conductors, while electric stress will be produced in the
dielectric, the elastic cells whose motion constitutes the molecular
vortices being at first deformed by the tangential stress of the
electric particles, but both the induced currents and the stress will
have entirely ceased as soon as all the molecular vortices are in full
swing.</p>

<p>Before a current can be maintained in a primary wire, the molecular
vortices in the surrounding field must be properly started, and this
requires the expenditure of work in consequence of the mass of the
bodies which constitute the vortices. It is therefore impossible
for a finite electro-motive force to start a finite current in an
indefinitely short time, in the same way as it is impossible for a
finite force to produce instantaneously a finite velocity in a material
body, and, just as in dynamics we sometimes speak of the reaction of
a body against acceleration as though it were a force opposing the
force applied, so we sometimes speak of the corresponding action in
the case of the current as though it were a force opposing the battery
or other electro-motor, and speak of it as the electro-motive force of
self-induction. As, however, this depends not on the current in the
wire simply, but on the molecular vortices in the surrounding medium,
it is clear that the self-induction of a wire will<span class="pagenum" id="Page_539">[Pg 539]</span> depend on the
energy of these vortices, and this must depend on the relations of the
several portions of the wire to one another and to the medium, as well
as on the density of the medium. The density of the medium Maxwell
identified with its <i>magnetic permeability</i>. This is greater in
(para-)magnetic substances than in air or vacuum; greatest of all
in iron. In fact, it is so great in the case of iron, that Maxwell
supposed the particles of the iron itself to take part in the vortex
motion. Hence the energy of the field, and therefore the self-induction
of the wire, is greater the greater the magnetic permeability of
the surrounding medium, and the presence of an iron-core in a coil
immensely increases its self-induction and the energy corresponding to
a given current flowing in the coil.</p>

<p>If, after a current has been established in a wire, the circuit be
broken or the electro-motive force removed, the molecular vortices
refuse to come to rest till they have expended their energy. The only
outlet for this energy is a current in the wire, since there is no
opportunity of doing work in a non-conducting medium, where there can
be no slipping between the elements of the mechanism. The vortices,
therefore, keep the electricity moving in the wire after the battery
has been removed, until they have expended all their energy in doing
work against the resistance of the wire.</p>

<p>But if there be another conductor in the field parallel or slightly
inclined to the first, there is another partial outlet for the energy
of the system, and a “secondary” current will be set up in the second
wire in the same direction as the current in the primary, while that
in the primary will be less than it would have been if no secondary
circuit had existed. In this way the hypothesis of molecular vortices
affords an explanation both of the mutual induction of two circuits and
the self-induction of one.</p>

<p>Suppose a wire to be placed in a magnetic field at right angles to the
lines of force, and then to be moved so as to cut the lines at right
angles, we should expect that in front of the moving wire the lines of
force or threads of vortices would be squeezed together transversely,
but extended in<span class="pagenum" id="Page_540">[Pg 540]</span> the direction of their length, somewhat in the same
way as elastic strings would be affected by the wire before they broke
and allowed it to pass through. Behind the wire the lateral pressure
will be relieved, the vortices will contract in the direction of
their axes and expand equatorially. But we have seen that the effect
of stretching a rotating elastic body in the direction of its axis
of rotation, and compressing it at right angles to this direction,
increases the velocity of rotation so that the actual velocity of
every point on the surface is increased; while the contraction of the
body along the axis of rotation diminishes the velocity. Hence as long
as the wire is moving across the lines of force the velocity of the
vortices in front of the wire will be greater than that of the vortices
behind, and the electric particles in the wire, coming, as they do,
between two sets of vortices, which are rotating with different
velocities, will flow in a stream along the wire. The direction of
the current in the wire will be that which would cause the vortices
in front to rotate more rapidly than those behind, and therefore to
exert a greater pressure on the wire; in other words, there will be a
current induced in such direction as to oppose the motion of the wire.
We arrive at a similar result if we suppose the lines of force to be
cut obliquely instead of orthogonally. Thus Lenz’s law is a consequence
of the hypothesis of molecular vortices. If we suppose the magnetic
force to act from south to north horizontally, the wire to be vertical
and to move from west to east, we have magnetic force acting from south
to north, mechanical force acting from east to west, and opposing
the motion of the wire, and electro-motive force acting in the wire
vertically <i>upwards</i>.</p>

<p>Suppose that all over a certain area the electricity, is pushed
forwards through a very small distance along the normal, so that it
does not pass from molecule to molecule of the substance, but in each
molecule undergoes a displacement from back to front. The electric
particles pressing tangentially on the walls of the elastic cells are
unable to set them rotating, because each cell is acted upon equally
all round in the direction in which the electricity tends to<span class="pagenum" id="Page_541">[Pg 541]</span> move,
and the substance of the cell therefore undergoes a shearing strain
which is resisted by its elasticity, and the state of strain of the
cells is propagated through the dielectric by means of the displacement
of the electric particles which behave like perfectly incompressible
bodies. When the force producing the original displacement is removed
the cells resume their original form in virtue of their elasticity, the
electric particles return to their normal positions, and the energy of
the strained elastic cells expends itself in the work done during the
electric discharge. Thus the same medium which serves as the vehicle of
magnetic force and produces all the phenomena of electromagnetism also
serves for the transmission of the force between charges of statical
electricity and as a reservoir of the energy due to electro-static
charges. If the dielectric be divided into cells by unit tubes of
force and equipotential surfaces drawn for every unit difference of
potential, each cell will contain the same amount of energy.<a id="FNanchor_257" href="#Footnote_257" class="fnanchor">[257]</a>
The following quotations from the paper in the <i>Philosophical
Magazine</i> explain the application of the hypothesis of molecular
vortices to statical electricity in Maxwell’s own words:—</p>

<div class="blockquot">

<p>According to our theory the particles which form the partitions
between the cells constitute the matter of electricity. The motion of
these particles constitutes an electric current; the tangential force
with which the particles are pressed by the matter of the cells is
electromotive force, and the pressure of the particles on each other
corresponds to the tension or potential of the electricity.</p>

<hr class="r5">

<p>A conducting body may be compared to a porous membrane which opposes
more or less resistance to the passage of a fluid; while a dielectric
is like an elastic membrane, which may be impervious to the fluid, but
transmits the pressure on the one side to [the fluid] on the other.</p>

<hr class="r5">

<p>In a dielectric under induction, we may conceive that the electricity
in each molecule is so displaced that one side is<span class="pagenum" id="Page_542">[Pg 542]</span> rendered positively
and the other negatively electrical, but that the electricity remains
entirely connected with the molecule, and does not pass from one
molecule to another.</p>

<p>The effect of this action on the whole dielectric is to produce a
general displacement of the electricity in a certain direction. This
displacement does not amount to a current, because when it has attained
a certain value it remains constant, but it is the commencement of a
current, and its variations constitute currents in the positive or
negative direction, according as the displacement is increasing or
diminishing.... When we find electromotive force producing displacement
in a dielectric, and when we find the dielectric recovering from its
state of electric displacement with an equal electromotive force,
we cannot help regarding the phenomena as those of an elastic body,
yielding to a pressure and recovering its form when the pressure is
removed.</p>
</div>

<p>Suppose we have a body positively electrified. This means that a
displacement of the electricity in the medium takes place in all
directions around the body and away from its surface. The cells
are thus exposed to a shearing strain, diminishing as the distance
increases, because the surface over which the displacement takes
place being increased the linear displacement of the electricity is
proportionately diminished, the particles of electricity behaving like
a perfectly incompressible fluid. The medium being isotropic the lines
of electric displacement coincide with those of electric stress, which
stress is everywhere proportional to the displacement. The distortion
which the cells experience by the pressure of the electric particles
induces an elastic pressure in all directions, at right angles to the
direction of displacement, so that there is a pressure in the medium at
right angles to the lines of force.</p>

<p>Now suppose that we have two positively charged bodies in the field,
which we may suppose to possess equal charges. Each produces a
displacement of the medium outwards from itself, but the electric
particles behaving like an incompressible fluid, it is clear that
there can be no lines of displacement from the one to the other, but
that between the bodies the lines of displacement will be curved so as
to avoid one another in the same way as the stream lines<span class="pagenum" id="Page_543">[Pg 543]</span> emanating
from two pipes, each of which is supplying water to a tank, would he
curved round, and would avoid one another. The lines of displacement,
and consequently the lines of force which coincide with them, will
therefore he bent in exactly the same manner as the magnetic lines of
force represented in Fig. 10, p. 533, and the pressure in the medium
at right angles to these lines will cause an apparent repulsion of the
bodies.</p>

<p>For the same displacement, that is, for the same charges of the little
bodies, the repulsion will be proportional to the elasticity of the
medium. It is also proportional to the product of the charges, or,
since they are equal, to the square of one of them. Suppose then that
the medium is exchanged for one of greater elasticity. If we wish to
keep the repulsion between the bodies the same, the displacements and
therefore the charges must be diminished, the product of these charges,
that is, the square of either charge, being made inversely proportional
to the elasticity of the medium. The magnitude of each charge must
therefore vary inversely as the square root of the elasticity of
the medium when the dielectric is changed. Hence, if we define the
electrostatic unit of electricity as “that quantity of positive
electricity which, acting on an equal quantity at unit distance repels
it with unit force,” it follows that the unit will vary with the
character of the dielectric, being inversely proportional to the square
root of its elasticity.</p>

<p>But the attraction or repulsion between two given charges of
electricity varies inversely as the specific inductive capacity of
the dielectric, so that the electrostatic unit of electricity varies
directly as the square root of the specific inductive capacity, and
thus the specific inductive capacity is a quantity which varies
inversely as the elasticity of the medium.</p>

<p>Suppose we have two parallel wires conveying equal electric currents
in the same direction. Other things remaining unchanged, the velocity
of the molecular vortices at any point is proportional to the strength
of the currents. The attraction between the wires we know to be
proportional<span class="pagenum" id="Page_544">[Pg 544]</span> to the product of the strength of the currents, that is
to the square of one of them. The pressure excited by the vortices is,
<i>cœteris paribus</i>, proportional to their density and the square of
their velocity. Suppose we keep the attraction between the wires the
same, but change the density of the medium. Then the velocity of the
vortices at any point must vary inversely as the square root of the
density of the medium. But the velocity of the vortices is proportional
to the strength of the currents. Hence the strength of each current
must vary inversely as the square root of the density of the medium.
If then the electromagnetic unit of current be defined as that current
which, flowing in a certain wire, attracts an equal current in another
given wire with unit force, the unit of current, and therefore the
unit of electricity, which is the amount flowing per second across any
section of a wire conveying a unit current, will vary inversely as the
square root of the density of the medium.</p>

<p>The ratio of the electromagnetic to the electrostatic unit of
electricity will therefore be proportional to the ratio of the square
root of the elasticity to the square root of the density of the medium.
But this is known to be the velocity with which a transverse vibration
is propagated through the medium. Hence the ratio of these units is a
concrete velocity, and is proportional to the velocity of propagation
of an electromagnetic disturbance, or of the vortex motions above
described, through the dielectric. If the units are chosen according
to the ordinary system their ratio is not only proportional to but
identical with this velocity.</p>

<p>In a paper published in the <i>Phil. Trans.</i> for 1868, Professor
Maxwell gave an account of an experiment for determining the ratio of
the electrostatic and electromagnetic units of electricity where air
is the dielectric. The principle of the method lay in balancing the
attraction between two electrified discs by the repulsion between two
coils of wire in which currents were flowing in opposite directions.
One of the discs and one coil was placed at one end of the beam of
a torsion balance, the other disc and coil being fixed, but a third
coil, conveying the same current as the other two,<span class="pagenum" id="Page_545">[Pg 545]</span> was placed at
the other end of the beam in order to eliminate the magnetic action
of the earth and the suspended coil. The apparatus is now in the
Cavendish Laboratory. The result of the experiment gave for the ratio
of the units a velocity of 288,000,000 metres, or 179,000 statute
miles per second. The result obtained by another method by MM. Weber
and Kohlrausch is 310,740,000 metres per second. The battery employed
for the electrostatic charges was M. Gassiot’s battery of 2600 cells,
charged with corrosive sublimate. The accuracy of this result depends
on that of the B. A. unit of resistance, the velocity being in fact
represented by 28·8 Ohms.</p>

<p>Now, according to the undulatory theory, light consists of transverse
vibrations of an elastic substance pervading space and all bodies,
and the velocity of light as determined by Foucault is 298,000,000
metres per second, or very near the mean of the values obtained by
Maxwell, and by Weber and Kohlrausch, for the velocity of propagation
of electro-magnetic disturbances. If this is found to be always the
case, clearly the same medium will serve to account for the phenomena
of electrostatics and electromagnetism, and for the propagation of
light which must consequently be of the nature of an electromagnetic
disturbance.</p>

<p>If an electromagnetic disturbance take place in a perfect insulator
we have seen that it must be transmitted to an unlimited distance,
for as no slipping can take place between the electric particles and
the cells, and as the particles themselves cannot be displaced except
by inducing a corresponding elastic stress in the medium, there is
no outlet for the energy of the disturbance, which must therefore be
communicated from cell to cell without limit. But if the medium be a
conductor, that is, if the electric particles can undergo a permanent
displacement passing from molecule to molecule against a frictional
resistance and without any tendency to return, the energy of the
electromagnetic disturbance will be gradually dissipated; for the
electric particles, instead of communicating the whole of the motion
of one layer of cells to the next, will themselves be set in motion,<span class="pagenum" id="Page_546">[Pg 546]</span>
and part of the energy will be dissipated as heat instead of being
imparted to the external layer of cells. The disturbance will therefore
continually diminish as it is propagated, until it very soon becomes
insensible. The behaviour is the same as that of a driver and follower
connected by a differential wheel, whose epicyclic motion is retarded
by forces of the nature of friction. Hence electromagnetic disturbances
cannot be propagated in conductors of electricity, and we therefore
infer that all true conductors are <i>opaque</i> to light.</p>

<p>The transparency of electrolytes, such as saline solutions and the
like, offers no difficulty in the face of this conclusion, as the
transference of electricity in them is by a process entirely different
from true conduction and more allied to the convection of heat, but
Maxwell pointed out that the transparency of gold leaf is much greater
than the theory would indicate. Thus the resistance of a particular
piece of gold leaf was such that it ought to transmit only \(10^{-50}\)
of the light incident upon it, which would be totally imperceptible,
while the amount of green light actually transmitted by it was easily
perceived. This result Professor Maxwell could reconcile with the
theory only by supposing “that there is less loss of energy when the
electromotive forces are reversed with the rapidity of the vibrations
of light than when they act for sensible times, as in our experiments.”</p>

<p>We have seen that the velocity of transmission of an electromagnetic
disturbance in any medium is expressed by the quotient of the square
root of the elasticity divided by the square root of the density of
the dielectric. We have learned that the elasticity is inversely
proportional to the specific inductive capacity of the medium while the
density corresponds with the magnetic permeability. Hence we infer that
the velocity of transmission of an electromagnetic disturbance varies
inversely as the square root of the specific inductive capacity, and
also inversely as the square root of the magnetic permeability of the
dielectric, and this must be true for the velocity of light if light be
an electromagnetic disturbance. Now the magnetic permeability of most
transparent media, such as glass, quartz, sulphur, hydrocarbons,<span class="pagenum" id="Page_547">[Pg 547]</span> and
the like, does not differ sensibly from that of a vacuum, and hence in
these substances the velocity of light must be inversely proportional
to the square root of their specific inductive capacity; or, since
the index of refraction of a medium is the ratio of the velocity of
light in a vacuum to its velocity in that medium, it follows that the
refractive index must be directly proportional to the square root of
the specific inductive capacity. As all our measurements of specific
inductive capacity refer tb the action of electro-motive forces which
continue for a much longer time than the duration of a luminous
vibration, we should expect the last mentioned relation to agree most
nearly with experiment the longer the wave length of the light, or, as
it is sometimes stated, the specific inductive capacity of a dielectric
should be equal to the square of its refractive index for “<i>light of
infinite wave length</i>.”</p>

<p>The results of the measurements of the specific inductive capacity of
certain liquids by Silow, and of gases, sulphur, paraffin, and resin,
agree with this theory as well as can be expected. Boltzmann also finds
that the specific inductive capacities of crystalline sulphur along its
three crystallographic axes are different, these differences coinciding
with the differences of the squares of the refractive indices for light
transmitted along these three directions.</p>

<p>Dr. Hopkinson (<i>Phil. Trans.</i> Part II. 1881) has recently measured
the specific inductive capacities of turpentine, benzol, petroleum,
ozokerit lubricating oil, castor oil, sperm oil, olive oil, and neats’
foot oil. The hydrocarbons give results which are quite in accordance
with Maxwell's theory, but the fatty oils, which are compounds of
glycerine with fatty acids, have inductive capacities far too great.
The same appears to be the case with all the varieties of glass tested
by Hopkinson, the specific inductive capacities of which vary from
6·61 in the case of very light flint to 9·896 for “double extra-dense”
flint. In the case of solid paraffin, Hopkinson’s result agrees very
nearly with that of Boltzmann and with Maxwell’s theory. In the case
of glass, as in that of the fatty oils, the high specific inductive
capacity is<span class="pagenum" id="Page_548">[Pg 548]</span> associated with a complex chemical constitution, glass
consisting essentially of metallic silicates, including silicates of
the alkaline and alkaline-earthy metals.</p>

<p>The measurement of the specific inductive capacity of glass is attended
with great difficulty on account of the phenomenon generally known as
residual charge or electric absorption, that is the <i>apparent</i>
soaking of the electricity into the substance of the glass. This is a
subject in which Maxwell took very great interest, and in his work on
electricity and magnetism he has given a mechanical illustration of
the action on the supposition that it is due to a want of homogeneity
in the glass, some parts of which, he supposed to conduct electricity
better than others, though badly at the best. A form of experiment,
very beautiful in its design, was devised by Maxwell for measuring
specific inductive capacities, and was carried out by Mr. J. E. H.
Gordon, who was able to reverse the electric stress in the glass 12,000
times per second; but this is of course no approximation to the rapid
alternations of the “waves” of light. With the apparatus employed,
however, the reduction of the observations involves great mathematical
difficulties, and the results must therefore be received with caution
whether we regard them as supporting the theory or as opposed thereto.</p>

<p>In applying the hypothesis of molecular vortices to the action of a
magnetic field oh polarised light, Maxwell “found that the only effect
which the rotation of the vortices will have on the light will be to
make the plane of polarisation rotate in the <i>same</i> direction as
the vortices, through an angle proportional—</p>

<p>(A) to the thickness of the substance.</p>

<p>(B) to the resolved part of the magnetic force parallel to the ray.</p>

<p>(C) to the index of refraction of the ray.</p>

<p>(D) inversely to the square of the wave length in air.</p>

<p>(E) to the <i>mean radius</i> of the vortices.</p>

<p>(F) to the capacity for magnetic induction.”</p>

<p>The relation (E) between the amount of rotation and the size of the
vortices, shows that different substances may differ in<span class="pagenum" id="Page_549">[Pg 549]</span> rotating power
independently of any observable difference in other respects. We know
nothing of the absolute size of the vortices; and on our hypothesis
the optical phenomena are probably the only data for determining their
relative size in different substances.</p>

<p>Now, independently of the action of a magnetic field on polarised
light, all the phenomena of diamagnetism can be accounted for on the
hypothesis that the magnetic permeability of diamagnetic substances is
less than that of a vacuum, so that they behave like a paramagnetic
substance immersed in a medium more magnetic than itself. But Maxwell
has pointed out that “since M. Verdet has discovered that magnetic
substances have an effect on light opposite to that of diamagnetic
substances, it follows that the molecular rotation must be opposite in
the two classes of substances.”</p>

<div class="blockquot">

<p>We can no longer, therefore, consider diamagnetic bodies as those whose
coefficient of magnetic induction is less than that of space empty of
gross matter. We must admit the diamagnetic state to be the opposite of
the paramagnetic; and that the vortices, or at least the influential
majority of them, in diamagnetic substances, revolve in the direction
in which positive electricity revolves in the magnetising bobbin, while
in paramagnetic substances they revolve in the opposite direction.</p>
</div>

<p>Perhaps we cannot conclude this account of the hypothesis of molecular
vortices better than by quoting Maxwell’s own words:—<a id="FNanchor_258" href="#Footnote_258" class="fnanchor">[258]</a></p>

<div class="blockquot">

<p>I think we have good evidence for the opinion that some phenomenon
of rotation is going on in the magnetic field; that this rotation is
performed by a great number of very small portions of matter, each
rotating on its own axis, this axis being parallel to the direction of
the magnetic force, and that the rotations of these different vortices
are made to depend on one another by means of some kind of mechanism
connecting them.</p>

<p>The attempt which I [have] made to imagine a working model of this
mechanism must be taken for no more than it really is, a demonstration
that mechanism may be imagined capable of producing a connection
mechanically equivalent to<span class="pagenum" id="Page_550">[Pg 550]</span> the actual connection of the parts of
the electro-magnetic field. The problem of determining the mechanism
required to establish a given species of connection between the
motions of the parts of a system always admits of an infinite number
of solutions. Of these some may be more clumsy or more complex than
others, but all must satisfy the conditions of mechanism in general.</p>

<p>The following results of the theory, however, are of higher value:—</p>

<p>(1) Magnetic force is the effect of the centrifugal force of the
vortices.</p>

<p>(2) Electromagnetic induction of currents is the effect of the forces
called into play when the velocity of the vortices is changing.</p>

<p>(3) Electromotive force arises from the stress on the connecting
mechanism.</p>

<p>(4) Electric displacement arises from the elastic yielding of the
connecting mechanism.</p>
</div>

<figure class="figright width500" id="i_597" style="width: 103px;">
<img src="images/i_597.jpg" width="103" height="305" alt="A technical
diagram showing a tall vertical apparatus with a long rod or wire
extending from top (M) to bottom (M'), passing through a central
cross-shaped piece labeled A, C, and B, flanked by two large
disk-shaped wheels labeled P and P' on either side.">
<figcaption class="caption">
<p>Fig. 13.</p></figcaption>
</figure>

<p>In a paper entitled “A Dynamical Theory of the Electro-magnetic Field,”
read before the Royal Society on December 8, 1864, Maxwell deduced all
the above results by purely mechanical reasoning, only assuming the
existence of a medium capable of receiving and storing up potential
and kinetic energy, and therefore capable of doing work in “recovering
from displacement in virtue of its elasticity,” while the parts of the
medium are connected by “a complicated mechanism capable of a vast
variety of motion, but at the same time so connected that the motion
of one part depends, according to definite relations, on the motion
of other parts, these motions being communicated by forces arising
from the relative displacements of the connected parts, in virtue of
their elasticity.” For the existence of such a medium we have evidence
independent of electrical actions. With regard to the mechanism no
attempt is made in the paper to give to it any definite constitution.
This paper has been regarded as Maxwell’s greatest contribution to
electrical science, but most of the results obtained in it have been
already mentioned.</p>

<p>The following is a good specimen of Maxwell’s humorous irony,
of which there are many samples in his scientific works. He is
discussing certain developments by Bernhard Riemann Lorenzo, of Weber
and Neumann’s theory of Electro-magnetism,<span class="pagenum" id="Page_551">[Pg 551]</span> which is based on the
assumption that the action between two quantities of electricity is
direct action at a distance, and depends not only on the distance
between the charges but upon their relative motion.</p>

<div class="blockquot">

<p>From the assumption of both these papers we may draw the
conclusions—first, that action and reaction are not always equal and
opposite; and second, that apparatus may be constructed to generate any
amount of work from its own resources.</p>

<hr class="r5">

<p>I think that these remarkable deductions from the latest developments
of Weber and Neumann’s theory can only be avoided by recognising the
action of a medium in electrical phenomena.</p>
</div>

<p>While at the Cavendish Laboratory Maxwell constructed a mechanical
model which illustrates in a very beautiful manner the principal
phenomena of induced currents. As a piece of mechanism it is simply
a differential train, such as is often employed as a dynamometer for
measuring the power absorbed by a machine. The apparatus is sketched in
Fig. 13. The grooved wheel P is keyed to the same shaft as the bevel
wheel A, which therefore turns with it, and the rotation of this piece
represents the primary<span class="pagenum" id="Page_552">[Pg 552]</span> current. A second bevel wheel D turns loosely
on the arm C D, which is one of four arms (of which only two are shown
in the figure) forming a cross, which can turn freely on the central
shaft at C. Sliding weights \(\mathrm{M} \mathrm{M}^{\prime}\), etc.,
can be fixed in any desired position on these arms so as to alter the
moment of inertia of the cross, which is the differential piece in the
mechanism. A third bevel wheel B is keyed to the same hollow shaft
with the wheel S, which is similar to P, and the rotation of the piece
B S represents the current in the secondary circuit. As the shaft B S
is hollow, and rides loosely on the shaft A C, the wheels A and B can
turn quite, independently of one another, except in so far as they are
connected by the wheel D. \(\mathrm{P}^{\prime}\) is an index attached
to the interior shaft and turning with P. A loop of string is hung over
each of the wheels P and S, and carries a small weight. These strings
act as friction brakes to the wheels, and the friction represents
the resistance of the primary and secondary circuits respectively.
The moment of inertia of the loaded cross, or differential piece,
represents the moments of inertia of the cells which constitute the
molecular vortices in the dielectric. Its kinetic energy when rotating
represents the energy of the vortices, and its angular momentum is
proportional to the electro-magnetic momentum of the system. The
moments of inertia of the other portions of the mechanism are very
small compared with that of the loaded cross. The motion of the cross
and the wheel D is impeded by as little friction as possible.</p>

<p>Suppose that the wheel P is made to revolve, representing a current in
the primary wire; the heavy cross will not at first move, but the wheel
D will revolve and communicate the motion to B, which, with S, will
rotate in the direction opposite to that of P, representing a current
in the secondary circuit opposite in direction to that in the primary.
But the motion of S is resisted by the friction brake, and a finite
force must therefore be exerted by D on B to drive it. The reaction of
B, together with the force exerted by A, will constantly tend to make
the cross revolve in the same direction as P, and the velocity of the
cross<span class="pagenum" id="Page_553">[Pg 553]</span> being constantly accelerated, it will presently revolve with a
velocity half that of P, and then D will roll round B, which, with S,
will remain at rest. The piece B S will then continue at rest as long
as the rotation of P remains constant corresponding to the cessation of
the current in the secondary circuit, while that in the primary remains
unchanged, but if P be accelerated, S will revolve in the direction
opposite to the motion of P. Now suppose P to be suddenly stopped. The
kinetic energy of the cross will cause it to continue to revolve until
it has done a corresponding amount of work against resistances, and A
being at rest, D will roll upon it and compel B, with S, to revolve
in the same direction as the cross, that is, in the same direction
in which P formerly revolved, and whatever be the resistance to the
motion of S, it will be overcome, and S will revolve till the work done
against resistance is equal to the kinetic energy originally possessed
by the cross. This corresponds to a current induced in the secondary
coil on stopping the current in the primary, which current is in the
same direction as the primary current, and continues until the energy
of rotation of the molecular vortices has been used up in work done
against electrical resistance.</p>

<p>If one operator lay hold of the wheel S, and endeavour to keep it
at rest while another applies a steady force to P, the motion of P
will be accelerated much less rapidly than if the same force had
been applied to it, and S had been free, because P can only move by
setting in motion the cross with its great moment of inertia. If the
operator who is turning P now suddenly stops it, a great shock will be
experienced by the machinery, and the wheel S will slip from the grip
of the other operator however firmly he may hold it. The force applied
to S may correspond to an air-break in the secondary coil, and this
is sufficient to prevent a spark when the battery current is started
in the primary, but by suddenly stopping the primary current, as in
Ruhmkorff’s coil, a disruptive discharge or spark passes through the
air between the terminations of the secondary wire. (If the operator
who endeavours to keep the wheel<span class="pagenum" id="Page_554">[Pg 554]</span> S at rest is inexperienced the effect
upon him is very striking).</p>

<p>If a pin be placed in the face of the wheel S, and one end of a spring
press against the pin, while the other end is fixed to the frame of
the apparatus, we have a representation of a secondary coil in which
the circuit is broken, and a Leyden jar inserted with its coatings in
connection with the ends of the wire. When the motion of P is changed,
S will begin to move, and will deflect the spring, corresponding to a
current in the secondary coil charging the Leyden jar. If the spring
admit of very great deflection, so that a great amount of work must
be done upon it before it slips from the pin, the primary current may
have attained its full strength before the slip takes place. This
corresponds to the capacity of the Leyden jar being too great to allow
of its being charged to a sufficient potential to produce a spark. In
this case no spark takes place, but when the force between the wheels
D and B diminishes on account of the diminution of the acceleration of
P, the spring relieves its strain by forcing the wheel S backwards, and
the Leyden jar under corresponding circumstances quietly discharges
itself through the secondary coil, reversing the operation by which it
was charged. But if the pin slips from the spring, the wheel S will
revolve, and the spring will fly back corresponding to a disruptive
discharge through the air, and if the acceleration of P continue long
enough several such disruptive discharges may take place.</p>

<p>We must, of course, be careful not to endeavour to learn from such a
model lessons which it was not designed to teach, and we must remember
that the behaviour of the mechanism does not represent the electrical
action in <i>all</i> respects.</p>

<p>For many years Maxwell rendered valuable service to the British
Association, especially in connection with electrical science. Some
account of the meetings which he attended will be found in the letters
printed in another part of this work, and though during the last few
years of his life other engagements prevented his attendance at the
annual gatherings, he always showed signs of keen enjoyment<span class="pagenum" id="Page_555">[Pg 555]</span> when
discussing the “British Asses.” In 1862 he was appointed a member of
“The Committee on Standards of Electrical Resistance.” In the report
issued in 1863, the Appendix, “On the Elementary Relations between
Electrical Measurements,” bears the name of Professor Maxwell in
conjunction with that of Professor Fleeming Jenkin, while the general
description of the method employed in the determination of the Ohm
or B. A. unit of resistance, together with the mathematical theory
and details of the experiments, are from Maxwell’s pen. In 1863-4
Maxwell was again at work on the same subject in the laboratory of
King’s College, and most of the “spins”<a id="FNanchor_259" href="#Footnote_259" class="fnanchor">[259]</a> were conducted under
his own supervision. In 1869 the results of Maxwell’s experiments
on the relation of the electromagnetic to the electrostatic unit of
electricity, described above, were embodied in the Report to the
British Association at the meeting at Dundee, and this forms the last
of the Reports of the Committee.</p>

<p>In 1874 Professor Maxwell was elected a member of the committee
appointed by the British Association for the purpose of investigating
Ohm’s law. Most of the work executed by this committee was carried
out by Professor Chrystal in the Cavendish Laboratory, under the
supervision and at the suggestion of Professor Maxwell. An account
of the investigations will be found in the report presented to the
Association at the Glasgow meeting in 1876.</p>

<p>Before concluding our notice of Maxwell’s contributions to electrical
science we must mention the preparation for the press of <i>The
Electrical Researches of the Honourable Henry Cavendish</i>, published
in 1879, only a few weeks before the death of its editor. The amount of
labour which Professor Maxwell bestowed on this work during the last
five years of his life can only be known to those who were constantly
in his company. Nearly all the MS. he transcribed with his own hand,
the greater part being copied after midnight, while he watched over
Mrs. Maxwell during the long illness to which allusion has elsewhere
been made. Every obscure<span class="pagenum" id="Page_556">[Pg 556]</span> passage or allusion was the subject of a long
and searching investigation; and many were the letters written to the
Librarian of the Royal Society and to scientific and literary friends
in different parts of the country, to gain information respecting the
meaning of obsolete words and symbols, or the history of individuals.
But besides this, and a comparison of Cavendish’s results with those
obtained by subsequent investigators, Maxwell repeated many of
Cavendish’s experiments almost in their original form, only employing
modern instruments for the purposes of measurement. The introduction
and the appendices to the work evidence much labour, patient
investigation, and very extensive acquaintance with the literature
bearing on the subject. Maxwell was by no means one of the class of
“thinkers” who only read their own writings; his acquaintance not only
with scientific literature, but with nearly every other class of books
was astonishing; and if any question of physics was brought before him,
he could generally give an account of nearly all that had been done
in the subject. In this respect he resembled the late Professor W. H.
Miller, whom Cambridge men used to consult about <i>everything</i>.</p>

<p>It would be impossible here to give any adequate account of Maxwell’s
work in connection with the Cavendish papers, but we may mention one
experiment both on account of its intrinsic importance and of the
interest which Maxwell took in it. Cavendish describes an experiment
(see p. 104 of <i>The Electrical Researches</i>) in which a sphere of
12·1 inches in diameter was enclosed between two copper hemispheres
13·3 inches in diameter, and the copper hemispheres, which were
supported in frames hinged together, and opened or closed by silk
cords, were brought together so as to enclose the sphere, contact
being made at the same time between it and the hemispheres. The outer
sphere was then charged, and the connection between it and the inner
sphere removed. On separating the hemispheres, the inner sphere was
found to be discharged, or at least the charge, if any, left upon it
was too small to affect Cavendish’s pith ball electrometer. Knowing
what fraction of the original charge could not fail to be detected<span class="pagenum" id="Page_557">[Pg 557]</span> by
the electrometer, Cavendish deduced from the results of the experiment
that the law of variation of electrical action with the distance
must lie between the inverse \(\left(2-\dfrac{1}{50}\right)\)th and
\(\left(2+\dfrac{1}{50}\right)\)th power of the distance, and inferred
that it is the inverse square.</p>

<p>Maxwell placed a copper sphere about 10 inches in diameter within a
hollow copper sphere, made of two hemispheres, about 12 inches in
diameter, supporting it upon a ring of ebonite, so that the spheres
might be concentric. The outer sphere was carefully insulated, and a
hole cut in its surface, which could be accurately filled by a little
trap door. To this trap door was attached a wire which rested on the
inner sphere when the door was shut down. The door was carried on a
metal arm which turned about a hinge attached to the outer sphere, and
could be raised or lowered by a silk thread which passed over a pulley
and hung in front of the operator. When the trap door was raised a wire
connection could be allowed to fall by relaxing a second silk cord, so
as to make contact with the inner sphere through the hole in the outer.
The trap door was first closed and the outer sphere charged by means of
a Leyden jar which was immediately removed (the electric machine being
placed in a distant apartment). The trap door was then raised, the
outer sphere discharged by connecting it to earth, and the inner sphere
then put in communication with a quadrant electrometer by means of the
wire above mentioned. Not a trace of electricity could be detected on
the sphere. To test the accuracy of the method, a small brass sphere
was insulated, and supported at a distance of about 60 centimetres
from the outer sphere, and the experiment was repeated. When the
copper sphere was charged the brass sphere was connected to earth,
and thus a small negative charge was induced upon it by the positive
electricity on the copper sphere, and the ratio of this charge to that
on the copper could be easily calculated. The brass sphere was then
insulated, the outer copper sphere discharged as before, and the inner
sphere examined with the same result as previously. The brass ball was
then discharged, the outer sphere being<span class="pagenum" id="Page_558">[Pg 558]</span> insulated, when it was found
that there was sufficient positive electricity on the outer sphere
to deflect the electrometer through more than 300 times the largest
deflection which could escape notice. Now when the brass hall was
insulated, the negative charge upon it was about \(\dfrac{1}{64}\)th of
the charge originally on the copper sphere, and this induced a positive
charge on the sphere when in connection with the earth, which was about
\(\dfrac{1}{486}\) of its original charge. Hence \(\dfrac{1}{486}\) of
the original charge is more than 300 times the largest charge which
could escape observation. From these figures it follows that, in the
expression of the law of electrical action, the true index of the
inverse power of the distance must be either 2 or differ from it by
less than \(\dfrac{1}{21600}\). These experiments were carried out
in the Cavendish Laboratory by Mr. MacAlister of St. John’s College.
In note 19 appended to the Cavendish papers, Maxwell describes the
experiment, and gives its complete mathematical theory.</p>

<p>The idea that electricity flowing in conductors behaves like an
incompressible fluid is at least as old as Cavendish; but before he
had the opportunity of reading Cavendish’s papers, Maxwell taught
that all electric discharges involve a displacement of electricity
in a closed circuit, the electricity behaving both in conductors and
in dielectrics like a perfectly incompressible fluid. Thus, when a
Leyden jar is discharged, a certain quantity of electricity flows from
the inner coating through the knob of the jar, and hence to the outer
coating, but an equal quantity also passes across any surface which
we may imagine drawn within the glass, so as to include the inner
coating and exclude the outer. The glass, therefore, may be regarded as
completing a circuit across every section of which the same quantity
of electricity flows. Again, if positive electricity be communicated
to a conductor by means of a wire which serves as an <i>electrode</i>,
an equal quantity passes out from the surface of the conductor and
is squeezed into the surrounding dielectric, causing a similar
transfer of electricity across every surface drawn in the dielectric
so as to surround the conductor, the extent of the displacement of
course diminishing as we recede from the<span class="pagenum" id="Page_559">[Pg 559]</span> conductor on account of
the increased area of the surface, but the displacement continuing
until some external conductor is reached through which the circuit is
completed. Thus, when we say that the charge of a body is increased,
we mean that positive electricity is communicated to it through an
electrode, but we know that an equal amount passes out of the body
through its external surface and is squeezed into the dielectric, and
it is this dielectric which is the only portion of the system really
affected by the charge, and in which the whole <i>energy</i> of the
charged body resides. This view has very recently been put forth under
the title of <i>The Conservation of Electricity</i>. According to
Maxwell’s view of the constitution of dielectrics, the squeezing of a
quantity of electricity into a dielectric does not imply a condensation
of the electricity, but a <i>strain</i> in the dielectric on account
of the displacement of the electricity, which cannot move without
distorting the “cells” of which the dielectric is supposed to be made
up.</p>


<p class="space-above2">
7. Ever since men began to think about Nature, philosophers have
differed in their views respecting the primary constitution of bodies.
When, with all the freshness of a first impulse, though unprovided
with the barest means of verification, the human mind first went forth
in search of physical truth, two paths at once appeared, leading to
opposite poles, and both were trodden by pilgrims full of hope. Some
found their satisfaction in contemplating the continuous fulness of the
universe. They could imagine no gap in Nature, whose endless variety
they were contented to refer to a principle of infinite divisibility
and to the inter-play of contiguous elements whose changes were
ordered by the mind that was interfused with all. To others, of a more
analytical turn, it appeared impossible to account for the most obvious
phenomena, except by the hypothesis of atoms moving in a void.</p>

<p>The penetrating intellect of Democritus had early given consistency
to an atomic theory, which became the foundation of the system of
Epicurus. Yet, widely as this philosophy prevailed at certain periods,
the doctrine of a<span class="pagenum" id="Page_560">[Pg 560]</span> plenum was on the whole the more prevalent in the
ancient world.</p>

<p>The controversy has been handed on to modern science, or rather it has
inevitably reappeared; some, with Descartes and Spinoza, resolving
matter into continuous extension; while others, as Bacon would say,
cut deeper into Nature, and would divide her if possible into her
ultimate constituent parts. Experimental investigations, especially
those through which chemistry became an exact science, have greatly
favoured atomistic views, yet the tendency to maintain the continuity
and plasticity of matter is still apparent, and the bold hypothesis of
the vortex atom, due to Sir William Thomson, affords us perhaps the
nearest approach to a reconciliation between these two contradictory
theories. According to this hypothesis the whole of space is filled
with a uniform and perfect fluid, and material atoms are vortices of
one form or another which have been created within this fluid.</p>

<p>In order to reach the starting-point of Maxwell’s investigations in
molecular physics we must go back to Daniel Bernoulli who, in his
hydrodynamics, published in 1738, explained the pressure of the air
on the hypothesis that air consists of a number of particles moving
about in all directions and impinging on any surface exposed to its
action. Le Sage of Geneva in 1818 explained the pressure of a gas in
strict accordance with the modern Dynamical Theory. The theory of Le
Sage was based upon his doctrine of “ultra-mundane corpuscles,” a
doctrine borrowed from the older atomists, and employed by Le Sage to
explain gravitation. For a concise account of this and of the older
atomic theories the reader is referred to Maxwell’s article “Atom”
in the ninth edition of the <i>Encyclopœdia Britannica</i>. In 1847
John Herapath published his <i>Mathematical Physics</i>, in which he
supposed gases to consist of perfectly hard molecules impinging against
one another, and against any surface exposed to their action; and he
points out the relation of the motion to the temperature and pressure
of a gas and explains gaseous diffusion.</p>

<p>But we are indebted for all the modern developments<span class="pagenum" id="Page_561">[Pg 561]</span> of the molecular
theory of gases, as well as for its establishment on a sound dynamical
basis, mainly to the researches of three men—Professor R. Clausius,
Dr. Ludwig Boltzmann of Vienna, and James Clerk Maxwell. Maxwell’s
principal contributions to the literature of this subject are his
papers on “Illustrations of the Dynamical Theory of Gases,” presented
to the British Association at the meeting in Aberdeen in 1859; “On
the Viscosity or Internal Friction of Air and other Gases,” which
constituted the Bakerian lecture read before the Royal Society on
February 8th, 1866, and published in the <i>Phil. Trans.</i> for that
year; “On the Dynamical Theory of Gases,” a paper read before the
Royal Society on May 31st, 1866, and also published in the <i>Phil.
Trans.</i>; the lecture “On Molecules” delivered before the British
Association at Bradford in 1873, and which has been referred to in Part
I.; a paper “On the Dynamical Evidence of the Molecular Constitution
of Bodies” which was read before the Chemical Society in the Spring of
1875, and published in the June number of its Journal; and the article
“Atom,” in the ninth edition of the <i>Encyclopœdia Britannica</i>.</p>

<p>According to the molecular theory all bodies are made up of molecules
which are more or less free to move relatively to one another. In
solids, each molecule can only move through a small distance from
its normal position, so that all its movements are essentially of
the nature of vibrations. In liquids the molecules are free to move
through any distances within the substance of the liquid, but their
motion is constantly impeded by neighbouring molecules, from whose
interference they are never altogether free, each molecule in its
movements resembling an individual endeavouring to work his way through
a dense crowd. In a gas each molecule is perfectly free—except on the
occasions, comparatively rare, unless the gas be very dense—when it
comes into collision with other molecules of gas, or of some other body
in contact with the gas. According to this theory, a gas consists of
molecules moving in all directions in straight lines, except when they
strike one another or some foreign body, when<span class="pagenum" id="Page_562">[Pg 562]</span> their motion is changed
in accordance with the laws of impact of perfectly elastic bodies.</p>

<p>It is probable that the investigations connected with Saturn’s rings,
which led Maxwell to contemplate the condition of the air in the midst
of “a flight of brickbats,” first led him to take up the subject of the
kinetic theory of gases. At any rate, these investigations led him to
the adoption of what he aptly termed “the statistical method,” which in
his hands became so fruitful in its applications to molecular science.
This method consists in the separation of all the things considered
into classes, which fulfil certain conditions, and the determination of
the number of individuals which at any instant are to be found in each
class, without reference to the behaviour of any particular individual.
In “the historical method,” on the other hand, the life history of each
individual is traced, and if classes are considered at all it is only
in their relation to the particular individual we are contemplating.
The first method deals with the interests of the community at large and
disregards the fate of the individual, except as affecting the average
condition of the community; the second deals with the interests of
the individual alone. It is obvious that when the individuals are to
be counted by millions the only way in which they can be successfully
treated by a finite mind is by the statistical method, and this was the
method which Maxwell adopted.</p>

<p>In the earliest papers of Clausius he treated all the molecules of
a particular gas at the same temperature as moving with the same
velocity. Maxwell showed that this could not be the case, and that,
even if all the molecules were started with the same velocities, their
mutual collisions would increase the velocity of some and diminish
that of others, until at length the velocities would be distributed
“according to the law of errors.” This law will be best understood
from Maxwell’s own illustration. He prepared a diagram illustrating
the distribution of bullet marks on a target on the hypothesis that
all the shots are aimed at the centre of “the bull” by the same
marksman, while the probability of an error of any given magnitude
occurring is less the greater<span class="pagenum" id="Page_563">[Pg 563]</span> the error: diminishing very rapidly as
the error increases, according to the ordinary hypothesis respecting
“errors of observation” developed by Laplace. If on such a diagram a
series of concentric circles be drawn, say an inch apart, about the
centre of the target, and the number of shots between each consecutive
pair of circles counted, the number will be found to be greatest for
a particular pair, but there is nothing to prevent some shots from
hitting the target at any distance from the centre. If the length of
the line joining the centre of the target with any bullet mark be taken
to represent the velocity of a molecule, the diagram will represent
the law of distribution of velocities among the molecules of a gas
when they have acted on one another for an indefinite time. They will
congregate about a particular value, but there is nothing to prevent
some individuals possessing a velocity as great or as small as we
please.</p>

<p>The momentum of a particle depends on the product of its mass and its
velocity; its kinetic energy on the product of its mass and the square
of its velocity. One of the first and most important properties of
gases which Maxwell showed to be a consequence of the kinetic theory
was, that when two groups of molecules are in equilibrium, being
separated only by a diaphragm which can transmit the impacts of the
particles, the average kinetic energy of the molecules must be the same
in each group. Identifying the kinetic energy of the molecules with
the heat of the gas, since we know that for equilibrium the gases must
be at the same temperature, it follows that the specific heat varies
inversely as the mass of a molecule, which is the dynamical expression
of the law of Dulong and Petit, a law which states that the products of
the specific heat and combining weight is the same for each element.
The pressure of a gas is proportional to the kinetic energy of unit
volume of a gas, and, since the average kinetic energy of the molecules
is the same for each gas at the same temperature, it follows that equal
volumes of two gases at the same pressure and temperature contain the
same number of molecules, and hence the density of a gas at standard
temperature and pressure is<span class="pagenum" id="Page_564">[Pg 564]</span> proportional to the mass of a molecule,
i.e. to its combining weight, which is Gay Lussac’s law of equivalent
volumes.</p>

<p>If two gases be in communication with one another, the particles of
each are found to penetrate the other until the gases become uniformly
mixed, unless some external force act to prevent the uniformity of the
mixture. This phenomenon, known as gaseous diffusion, has been studied
by Graham, Loschmidt, and others, and is a direct consequence of the
dynamical theory. It is plain that the rate of diffusion of one gas
into another will be proportional to the <i>average</i> velocity of
the particles in the case of two gases being separated by a diaphragm
perforated by very fine holes, so that each mixture may be considered
homogeneous up to the diaphragm. Maxwell showed that in this case,
when the pressures on the two sides of the diaphragm are equal, “the
volumes diffused will be as the square roots of the specific gravities
inversely, which is the law of diffusion established by Graham.”</p>

<p>The slowness of gaseous diffusion was for some time regarded as an
objection to the kinetic theory of gases. Clausius overcame this
difficulty by the introduction of the conception of <i>the mean
free path</i> of a molecule, and by showing how short this path is.
The mean free path is the average distance through which a particle
passes between two successive collisions with other particles. The
first estimate of the mean free path in air at ordinary pressure and
temperature was made by Maxwell from determinations of viscosity or
rate of diffusion of momentum in air. Depending on the length of the
mean free path are (1) the diffusion of matter; (2) the diffusion of
momentum or viscosity; and (3) the diffusion of energy, or the thermal
conductivity of the gas. From determinations of the rate at which these
three kinds of diffusion proceed, independent determinations of the
mean free path in different gases have been made. For hydrogen, at
standard pressure and temperature, it is about \(\dfrac{1}{250000}\) of
an inch. For other gases and air it is somewhat less. The length of the
mean path in air given by Maxwell in 1859 was \(\dfrac{1}{389000}\) of
an inch.</p>

<p><span class="pagenum" id="Page_565">[Pg 565]</span></p>

<p>Suppose two trains to be moving in opposite directions, side by side
on parallel lines, and suppose that as they pass each other a number
of passengers from each train jump into the other. It is clear that
each passenger will carry with him the <i>momentum</i> he possesses
into the other train which is moving in the opposite direction, and
will consequently diminish the momentum and therefore the velocity
of that train. If a continuous interchange of passengers, backwards
and forwards, between the trains were to take place, the trains would
ultimately be brought to rest relatively to one another. This is an
illustration of the <i>diffusion of momentum</i>, and was originally
given by Balfour Stewart. How, suppose two streams of gas to be passing
each other tangentially. There will be a continuous interchange of
molecules by diffusion between the two streams, and the molecules
carrying with them the momentum they possess, the effect of the
diffusion will be to tend to bring the two streams to relative rest.
Diffusion of momentum consequently introduces a tangential action
between layers of gas which are moving relatively to one another,
and therefore causes a resistance to any “continuous change of form,
depending on the rate at which that change is effected,” that is, it
confers upon the gas the property of viscosity. Thus, the so-called
viscosity of gases received from Maxwell its complete explanation in
accordance with the kinetic theory.</p>

<p>The viscosity of a gas depending on the rate of diffusion of momentum,
and therefore on the rate of diffusion of matter, is proportional,
like the latter, to the average velocity of the molecules. If the
gas be very rare, each particle will meet with fewer collisions, and
consequently its course will be less interrupted than when the gas
is denser, so that Maxwell found that between two strata of gas at a
given distance apart the rate of diffusion was the same whatever the
density. He thus “arrived at the startling result that the coefficient
of internal friction is independent of the density of any particular
kind of gas.” The experimental verification of this result occupied
a considerable portion of Maxwell’s leisure time in 1865. The<span class="pagenum" id="Page_566">[Pg 566]</span>
description of the experiments and the statement of the result arrived
at form the subject of the Bakerian lecture of 1866. There plates of
glass were suspended by a steel piano wire, and caused to oscillate in
their own planes between four fixed plates, which were placed at equal
distances apart, and so that the moving plates were suspended half way
between each pair of fixed plates (see Part I. p. 341). The distance
between the plates was varied in different experiments, and the whole
system was enclosed in a receiver which could be filled with different
gases and the pressure regulated at will. The oscillations of the
discs were observed by means of a mirror and scale, and the experiment
consisted in determining the rate at which the oscillations died away,
from which the viscosity of the gas was calculated. For experiments
at high temperatures the receiver was surrounded by a steam jacket.
The results arrived at showed that dry air is more viscous than damp
air, and that the viscosity of air is greater than that of hydrogen or
carbonic acid, nearly in the same ratio as was determined by Graham
in his experiments on the transpiration of gases through capillary
tubes. But the most remarkable results were (1), that the viscosity of
any particular gas is independent of the pressure; and (2) that it is
directly proportional to the temperature measured from the absolute
zero of the air thermometer.<a id="FNanchor_260" href="#Footnote_260" class="fnanchor">[260]</a> From the last result, Maxwell deduced
“that the force between two molecules is proportional inversely to the
fifth power of the distance between them.” If the molecules only acted
by impact, it would follow that the viscosity must be proportional to
the square root of the absolute temperature.</p>

<p>In the paper “On the Dynamical Theory of Gases,” read before the Royal
Society on May 31, 1866, the molecules are dealt with in the most
general manner, no hypothesis being made respecting their constitution.
The paper discusses (1) the phenomena of diffusion, depending on the
average value of the velocities; (2) the phenomena depending on the
average square of the velocities, which determines<span class="pagenum" id="Page_567">[Pg 567]</span> pressure and
viscosity; and (3) the phenomena depending on the average value of
the cubes of the velocities, on which depends the diffusion of energy
or the conduction of heat in the gas. In this paper Maxwell showed
that if a number of gases be enclosed in any space under the action
of any external forces, each gas will arrange itself as if the others
were absent, and this result is independent of the law of action of
the particles on each other. This is the arrangement which Dalton
suggested would probably exist in the atmosphere if the effect of
winds could be annulled. He also showed that in a vertical column
of air in equilibrium under the action of gravity the temperature
must be the same throughout. This was contrary to the then current
opinion that the temperature must diminish as we ascend, but Maxwell
showed independently that it is a consequence of the principle of
the dissipation of energy. Boltzmann was, however, the first to show
how, in dealing with a collection of molecules, to take account of
external forces acting upon them. In discussing the diffusion of energy
Maxwell showed that the thermal conductivity of iron at \(25^{\circ}
\mathrm{C}\), as determined by Principal Forbes, is 3525 times that of
air at \(16 \cdot 6^{\circ} \mathrm{C}\).</p>

<p>In the paper “On the Dynamical Evidence of the Molecular Constitution
of Bodies,” published in the <i>Journal of the Chemical Society</i>,
June 1875, Maxwell introduces Clausius’s conception of the “virial”
of a system, a quantity of which great use has been made in the
discussion of molecular theories since a name has been given to it by
Clausius. This quantity is the sum of the products of the attractions
between each pair of molecules into the distance between them. Maxwell
commences by explaining Clausius’s equation, which states that the
energy of a quantity of gas is the sum of two quantities, one of which
is the virial, and the other is proportional to the product of the
pressure and the volume. Now Joule showed that when a gas expands
into a vacuum its temperature remains sensibly unaffected, though no
energy is communicated to or taken from it, and since the gas obeys
Boyle’s law the product of its pressure and volume is constant.
Hence the energy being unchanged,<span class="pagenum" id="Page_568">[Pg 568]</span> and the product of pressure and
volume remaining the same, it follows that the <i>virial</i> must he
unaffected by expansion. But the virial must depend on the density if
there he any sensible forces between the molecules when at sensible
distances, unless the force between two molecules varies inversely as
the distance between them, a law which Newton showed to be inadmissible
in the case of molecular forces. We must therefore conclude that the
force between two molecules is sensibly zero, unless the distance
between them be very small compared with the average distance between
molecules, and that the virial is therefore sensibly zero in a gas,
so that the energy and pressure of a gas depend on the motion of the
molecules and not on the forces between them.</p>

<p>The experiments of Regnault indicated that in most gases as the density
increases the pressure falls below that indicated by Boyle’s law, which
shows that when the particles approach very near together the virial
is positive, or there is attraction between the molecules. When the
pressure is made still greater the gas reaches a condition in which a
small increase of density is accompanied by an enormous increase of
pressure, so that the virial is negative, and the forces between the
particles repulsive. This is the case in the liquid state. Maxwell
infers that as the particles of a gas approach each other the forces
between them become attractive, attain a maximum, then diminish, and
when they are within a certain distance become repulsive, the repulsion
increasing so rapidly “that no attainable force can reduce the distance
of the particles to zero.” The same conclusion as far as the attraction
between the particles at small distances is concerned, was indicated
by the experiments which Joule conducted, in company with Sir William
Thomson, on the expansion of air into a vacuum, when very careful
measurements indicated that a slight cooling effect took place.</p>

<p>The greatest difficulty which the kinetic theory of gases has to
face is the observed relation between the specific heats of gases at
constant pressure and at constant volume. Boltzmann showed that if each
molecule possess \(n\) “degrees<span class="pagenum" id="Page_569">[Pg 569]</span> of freedom” the ratio of the kinetic
energy of translation to the whole kinetic energy of the system must
be equal to the ratio of 3 to \(n\). Now in a rigid body capable of
rotating in any manner n is equal to 6, and this makes the total energy
equal to twice the energy of translation. This requires that the ratio
of the two specific heats should be 1·33 instead of 1·408, and the
observed ratio therefore disproves the hypothesis of hard bodies. If we
suppose the molecules to be material points, incapable of rotation or
vibration n is equal to 3, and the energy of translation is the whole
of the kinetic energy possessed by the molecules. This would make the
ratio of the specific heats to be 1·66, which is too great for any real
gas except mercury vapour, for which the ratio has been shown by Kundt
and Warbourg to be nearly 1·66.</p>

<p>The spectroscope shows that the molecules of a gas are capable of
executing vibrations in various periods. They must therefore be
material systems, and cannot have less than six degrees of freedom. The
ratio of the specific heats cannot therefore be greater than 1·33, and
this is too small for most gases. Every additional degree of freedom
possessed by the molecules makes the ratio less, and requires that the
specific heat of the gas should be greater than is observed to be the
case.</p>

<p>In a paper “On Boltzmann’s Theorem on the Average Distribution of
Energy in a System of Material Points,” read before the Cambridge
Philosophical Society on May 6, 1878, Maxwell showed that whatever
be the forces acting upon or between the molecules, provided they be
subject to the principle of conservation of energy, the average kinetic
energy of any two given portions must be proportional to the number
of degrees of freedom of these portions, and hence the total kinetic
energy corresponding to an increment of temperature of \(1^{\circ}
\mathrm{C}\) is shown to be proportional to the product of the number
of degrees of freedom into the absolute temperature.</p>

<p>The actual dimensions of molecules were first estimated by Loschmidt in
1865, then by Stoney in 1868, and by Thomson in 1870. At his lecture
“On Molecules,” before the British Association at Bradford, Maxwell
gave the following</p>

<p><span class="pagenum" id="Page_570">[Pg 570]</span></p>

<p class="nindc space-above2">TABLE OF MOLECULAR DATA,</p>

<p class="nindc">
Divided into three ranks, according to the degree of accuracy with
which the Quantities are known.</p>

<table class="autotable">
<tbody><tr>
<td class="tdc"></td>
<td class="tdc">Hydrogen.</td>
<td class="tdc">Oxygen.</td>
<td class="tdc">Carbonic Oxide.</td>
<td class="tdc">Carbonic Acid.</td>
</tr><tr>
<td class="tdl">Mass of Molecule (Hydrogen=1)</td>
<td class="tdr">1</td>
<td class="tdr">16</td>
<td class="tdr">14</td>
<td class="tdr">22</td>
</tr><tr>
<td class="tdl">Rank<br>
I. Velocity (of mean square) metres per second at \(0^{\circ} \mathrm{C}\)}</td>
<td class="tdr_bot">1859</td>
<td class="tdr_bot">465</td>
<td class="tdr_bot">497</td>
<td class="tdr_bot">396</td>
</tr><tr>
<td class="tdl">Mean path, tenth-metres</td>
<td class="tdr">965</td>
<td class="tdr">560</td>
<td class="tdr">482</td>
<td class="tdr">379</td>
</tr><tr>
<td class="tdl">Rank<br>
II. Collisions in a second (millions)</td>
<td class="tdr_bot">17,750</td>
<td class="tdr_bot">7646</td>
<td class="tdr_bot">9489</td>
<td class="tdr_bot">9720</td>
</tr><tr>
<td class="tdl">Rank<br>
III. Diameter, tenth-metres.</td>
<td class="tdr">\(5 \cdot 8\)</td>
<td class="tdr">\(7 \cdot 6\)</td>
<td class="tdr">\(8 \cdot 3\)</td>
<td class="tdr">\(9 \cdot 3\)</td>
</tr><tr>
<td class="tdl">Mass, twenty-fifth-grammes</td>
<td class="tdr">46</td>
<td class="tdr">736</td>
<td class="tdr">644</td>
<td class="tdr">1012</td>
</tr>
</tbody>
</table>

<div class="blockquot">

<p class="right"><i>30th June 1877.</i></p>

<p><span class="allsmcap">Dear Garnett</span>—... I have been considering diffusion of
gases, and the method of separating heavy gases from light ones, and
I find it hopeless to do it by gravity, but if a tube 10 cm. long
with two bulbs, and the straight part stuffed with cotton-wool, were
filled with equal volumes of H and \(\mathrm{CO}_{2}\), and spun 100
times round per second for about half an hour, then the ratio of
\(\mathrm{CO}_{2}\) to H by volume would be greater in A than in B by
about \(\dfrac{1}{150}\), which is measurable. I have got a new light
about equilibrium of temperature in two different gases. Let forces
having potentials act on the molecules of two gases, but differently
on each. Let the potential of forces acting on the gas \(a\) be zero
in the region A and very large in B, diminishing continuously in the
stratum C. Let the potential for gas \(b\) be zero in B and very great
in A, diminishing continuously in C. Then the region A will contain
the gas A nearly pure, and B the gas B nearly pure, and in the stratum
C there will be encounters between the two kinds of molecules. By
Boltzmann and Watson the average kinetic energy of a single molecule is
the same throughout the whole vessel. Hence the condition of thermal
equilibrium between two gases (not mixed, but kept pure though in
contact) is that the mean kinetic energy is the same in each. And it is
difficult to see where this method breaks down when applied to solids.</p>

<p>I find the electric conductivity of air supposed of conducting spheres
<span class="pagenum" id="Page_571">[Pg 571]</span>to be \(\dfrac{1}{18} \pi^{2} s^{2} \mathrm{NV}\).</p>

<p>Where \(s\) = distance of centres at striking.</p>

<p>\(N\) Number in cubic centimetre.</p>

<p>\(V\) Mean velocity.</p>

<p>Now \(\dfrac{\pi}{4} s^{2} \mathrm{N}=17,700\) for air, and
\(\mathrm{V}=48,500\).</p>

<p>But this is in electrostatic measure. In electromagnetic measure the
resistance is
\[
\frac{4}{\pi} \frac{v^{2}}{48500000},
\]
so that \(r=2.10^{13}\) per cubic centimetre, or about \(10^{10}\)
greater than that of copper; but this is far smaller than that of
gutta-percha. Hence the insulating power of air is not consistent with
its molecules being conducting spheres.</p>

<p>But why should the molecules be conductors?—Yours very truly,</p>

<p class="right"><span class="allsmcap">J. Clerk Maxwell.</span></p>
</div>

<p>Maxwell’s investigations in the Kinetic Theory of Gases led him to
a conclusion which is of great value in the theory of energy. The
principle of the dissipation of energy, sometimes called the second law
of Thermodynamics, states that it is impossible by means of inanimate
material agency to obtain work at the expense of heat by cooling a body
below the temperature of the coldest body in the neighbourhood. This
principle was first distinctly given by Sir William Thomson. Maxwell
showed that it obtains only in consequence of the coarseness of our
faculties not allowing us to grapple with individual molecules. If we
could seize upon individual molecules, and bring them to rest in the
same way as we can lay hold of a fly-wheel, and compel it to do useful
work until it has been deprived of all its motion of rotation, we
could convert the whole of the heat of a body into work, and bring it
to the absolute zero of temperature. As it is, we are at the mercy of
the molecules, and capable of obtaining from them only so much work as
they are willing to give in the most favourable circumstances in which
we are able to place them. Maxwell imagined a quantity of gas, all
initially at the same pressure and temperature, to be divided into two
portions, A and B, by a partition full of little trap doors which might
be<span class="pagenum" id="Page_572">[Pg 572]</span> opened or closed without the expenditure of energy. Each trap door
he supposed placed in charge of a “<i>demon</i>” that is a creature
whose eyes are sharp enough to see the molecules and estimate their
velocities, and hands agile enough to open and close the trap doors in
time to allow or prevent the passage of any particular molecule which
is approaching the partition. The operation depends on the difference
of the velocities of the particles in the same mass of gas, and the
office of the demon is purely selective, so that any mechanism which
could be devised to sort the molecules in the same way would be equally
effective. Suppose each demon to open his trap door when a molecule is
approaching the partition from A with a velocity above the average, but
to keep it closed when the velocity of the molecule approaching from
A is below the average; while in the case of a molecule approaching
the partition from B the door is opened if the velocity be small, and
closed if it be great. In this way all the slowly moving molecules
will gradually be sorted into the compartment A, while the rapidly
moving particles will be accumulated in B. Thus the temperature of
the gas in B will be raised, and that in A lowered without any loss
of energy or any work being done by an external agent. A heat engine
may now be employed, using B as the source and A as the condenser, and
doing work at the expense of part of the heat of A until equilibrium
of temperature between B and A has been produced, when the services
of the demons may be again utilised, and the process repeated until
the whole of the heat of the gas has been converted into work. This is
contrary to the principle of dissipation of energy, which has thus been
circumvented by intelligence. No corresponding method of overcoming the
principle of conservation of energy can be devised, and this principle
is thus shown to rest on an entirely different kind of footing from
that of the second law of Thermodynamics.</p>

<p>The following extract from Maxwell’s article “Atom” in the ninth
edition of the <i>Encyclopœdia Britannica</i> is characteristic.
Speaking of the teaching of molecular science respecting the size of
atoms, he says:—</p>

<p><span class="pagenum" id="Page_573">[Pg 573]</span></p>

<div class="blockquot">

<p>It forbids the physiologist from imagining that structural details of
infinitely small dimensions can furnish an explanation of the infinite
variety which exists in the properties and functions of the most minute
organisms.</p>

<p>A microscopic germ is, we know, capable of development into a
highly organised animal. Another germ, equally microscopic, becomes
when developed an animal of a totally different kind. Do all the
differences, infinite in number, which distinguish one animal from
another arise each from some difference in the structure of the
respective germs? Even if we admit this as possible we shall be called
upon by the advocates of Pangenesis to admit still greater marvels. For
the microscopic germ, according to this theory, is no mere individual,
but a representative body, containing members collected from every rank
of the long-drawn ramification of the ancestral tree, the number of
these members being amply sufficient not only to furnish the hereditary
characteristics of every organ of the body, and every habit of the
animal from birth to death, but also to afford a stock of latent
gemmules to be passed on in an inactive state from germ to germ, till
at last the ancestral peculiarity which it represents is revived in
some remote descendant.</p>

<p>Some of the exponents of this theory of heredity have attempted to
elude the difficulty of placing a whole world of wonders within a body
so small and so devoid of visible structure as a germ, by using the
phrase structureless germs. Now, one material system can differ from
another only in the configuration and motion which it has at a given
instant. To explain differences of function and development of a germ
without assuming differences of structure is therefore to admit that
the properties of a germ are not those of a purely material system.</p>
</div>

<p>A paper “On Stresses in Rarefied Gases arising from Inequalities of
Temperature,” by Professor Maxwell, was read before the Royal Society
on April 11, 1878, and published in the <i>Phil. Trans.</i> for 1879.
The notes and appendix added to the paper in May and June 1879 embodied
the results of Maxwell’s last investigations in the kinetics of gases.
In this paper Maxwell showed that when inequalities of temperature
exist in a gas the pressure at a point is not generally the same in all
directions, but the maximum and minimum pressures differ by an amount
depending on the rate of change of the increase of temperature per unit
length in the direction in which this rate is greatest.<span class="pagenum" id="Page_574">[Pg 574]</span> The stress
thus arising from variation in rate of change of temperature varies
inversely as the pressure of the gas, and is therefore most conspicuous
in high vacuo. If two small bodies are warmer than the air, the line
joining them will be a line of maximum pressure, and they will repel
each other, while they will attract one another if they are colder than
the air. If, however, a ring be placed so as to have the line joining
the bodies for its axis and be sufficiently heated the repulsion may be
changed into attraction. In the case of a cup, as noticed by Stokes,
the variation of the rate of change of temperature is much greater
on the convex side than on the concave, where it is nearly uniform,
like the electric potential within a hollow vessel, and hence the
normal pressure is greater on the convex surface than on the concave,
which will account for the motion of the cup radiometer if tangential
stresses are neglected. But when the tangential stresses on any
portion of gas are considered, it appears, that they, with the normal
forces, form a system which is in equilibrium, so that inequality of
temperature has no tendency of itself (<i>i.e.</i> without the action
of gravity, etc.), to produce currents in the gas. Maxwell therefore
concludes that the above explanation is insufficient, and that the true
cause of the motion is to be found in the character of the tangential
action between the solid and the gas, allowing the gas to slide over
the surface of the solid, and thus diminishing the tangential stresses
without affecting the normal stresses. In the appendix, dated May 1879,
Maxwell determined the character of the tangential action on certain
hypotheses respecting the nature of the surface of the solid, and the
character of the collisions, and concluded that the gas may slide over
the surface of the solid with a finite velocity, and that inequalities
of temperature at the surface “give rise to a force tending to make the
gas slide along the surface from colder to hotter places.”</p>

<p>Most of the more elementary theorems respecting the kinetic theory of
gases are given in a very concise form by Maxwell in his <i>Theory
of Heat</i>, the more recent editions of which also give an account
of Professor Willard Gibbs’<span class="pagenum" id="Page_575">[Pg 575]</span> Thermodynamic Surface. This surface, in
which the co-ordinates represent respectively the energy, entropy, and
volume of the substance to which it corresponds, was modelled in clay
by Maxwell’s own hands in the Cavendish Laboratory. From the clay model
a number of plaster casts were taken. These casts Maxwell placed in the
sunshine in particular positions, and drew upon them in water-colours
the boundary-lines between the light and shadow, which correspond
to constant pressure or constant temperature, on the part of the
substance. An account of this surface, and many of the properties which
it represents, will be found in the work referred to.</p>


<p class="space-above2">
We have now presented to the reader a scanty selection from the
results of Maxwell’s scientific work. The mere enumeration of his
original papers would occupy several pages of this book, and those
who are desirous of forming any approach to a true conception of
his contributions to science should consult the memorial edition of
Maxwell’s papers, edited by Mr. W. D. Niven, F.R.S., and about to be
published by the Cambridge University press.</p>



<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_246" href="#FNanchor_246" class="label">[246]</a> 
The following table gives the position on the scale
and wave length in Fraunhofer’s measure of the colours selected as
standards:—
\[
\begin{array}{lllllc}
& \text{Scale} & \text{Wave length}. \\
\text{R Scarlet} & 24 & 2328 \\
\text{G Green} & 46\frac{3}{4} & 1914 \\
\text{B Blue} & 64\frac{1}{2} & 1717
\end{array}
\]</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_247" href="#FNanchor_247" class="label">[247]</a> 
Part I. <a href="#Page_315">p. 315.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_248" href="#FNanchor_248" class="label">[248]</a> 
See Part I. <a href="#Page_217">p. 217.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_249" href="#FNanchor_249" class="label">[249]</a> 
Including the present Lord Bishop of Durham.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_250" href="#FNanchor_250" class="label">[250]</a> 
See Part I. <a href="#Page_37">p. 37.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_251" href="#FNanchor_251" class="label">[251]</a> 
Maxwell had a great faculty for designing, and would
frequently amuse himself by making curious patterns for wool-work. His
designs are remarkable for the harmony of the colouring. Sometimes they
represented natural objects. A kettle-holder which used to hang by the
fireside was a representation of a square of unannealed glass when
placed between two crossed Nicol prism's.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_252" href="#FNanchor_252" class="label">[252]</a> 
After Listing. <i>Censur raïmlicher complexe</i>, etc.
Göttingen Nachrichten, 1861. Also Cayley.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_253" href="#FNanchor_253" class="label">[253]</a> 
The evidence of this supposed change in the
configuration of the rings is far from conclusive.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_254" href="#FNanchor_254" class="label">[254]</a> 
See <a href="#Page_278">p. 278.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_255" href="#FNanchor_255" class="label">[255]</a> 
See <a href="#Page_295">p. 295.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_256" href="#FNanchor_256" class="label">[256]</a> 
See also Maxwell’s article on “Faraday” in <i>Ency.
Brit.</i>, 9th edit.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_257" href="#FNanchor_257" class="label">[257]</a> 
See <i>Elementary Treatise on Electricity</i> by
Professor James Clerk Maxwell, published by the Clarendon Press, 1881.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_258" href="#FNanchor_258" class="label">[258]</a> 
<i>Electricity and Magnetism</i>, vol. <span class="allsmcap">II.</span> Art.
831 (1st ed.)</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_259" href="#FNanchor_259" class="label">[259]</a> 
See Part I. <a href="#Page_316">p. 316.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_260" href="#FNanchor_260" class="label">[260]</a> 
More recent experiments indicate that this statement
should be modified.</p>

</div>
</div>


<p class="nindc space-above2 space-below2">END OF PART II.</p>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_577">[Pg 577]</span></p>
<h2 class="nobreak" id="PART_III">PART III.<br>
<br>
POEMS.</h2>
</div>

<p class="nindc space-above2">I. JUVENILE VERSES AND TRANSLATIONS.</p>


<p class="nindc">
<span class="allsmcap">Translation of Virgil—Æneid, l 159 to 169.</span></p>

<p class="nindc"><i>School Exercise</i>, 10th May 1844. <i>Æt.</i> 12.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">THERE lies within a long recess a bay,</div>
    <div class="verse indent0">An isle with gulfing sides restrains the sea,</div>
    <div class="verse indent0">The waves, divided ere they reach the shore,</div>
    <div class="verse indent0">Run through the winding bay, and cease to roar;</div>
    <div class="verse indent0">On this side and on that vast rocks arise,</div>
    <div class="verse indent0">And two twin crags ascending threat the skies,</div>
    <div class="verse indent0">Beneath whose shade the water silent lies;</div>
    <div class="verse indent0">Above, with waving branches, stands a wood,</div>
    <div class="verse indent0">A grove with awful shade o’erhangs the flood,</div>
    <div class="verse indent0">And on the further side a cave is shown,—</div>
    <div class="verse indent0">Within, fresh springs, and seats of living stone—</div>
    <div class="verse indent0">The nymphs’ abode; no chains or anchors bind</div>
    <div class="verse indent0">The worn-out ships, secure from waves and wind.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
(School Rhymes). [Nov.] 1844.[1] <i>Æt.</i> 13.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">O ACADEMIC muse that hast for long</div>
    <div class="verse indent0">Charmed all the world with thy disciples’ song,<span class="pagenum" id="Page_578">[Pg 578]</span></div>
    <div class="verse indent0">As myrtle bushes must give place to trees,</div>
    <div class="verse indent0">Our humbler strains can now no longer please.</div>
    <div class="verse indent0">Look down for once, inspire me in these lays</div>
    <div class="verse indent0">In lofty verse to sing our Lector’s praise.</div>
    <div class="verse indent0">The mighty wheel of Time to light has rolled</div>
    <div class="verse indent0">That golden age by ancient bards foretold.</div>
    <div class="verse indent0">Minerva now descends upon our land,</div>
    <div class="verse indent0">And scatters knowledge with unsparing hand;</div>
    <div class="verse indent0">Long since Ulysses saw the heavenly maid,</div>
    <div class="verse indent0">In Mentor’s form and Mentor’s dress arrayed,</div>
    <div class="verse indent0">But now to Cambrian lands the goddess flies,</div>
    <div class="verse indent0">And drops in Williams’ form from out the skies;</div>
    <div class="verse indent0">And as at dawn the brilliant orb of light,</div>
    <div class="verse indent0">With his bright beams dispels the gloomy night,</div>
    <div class="verse indent0">So sunk in ignorance our land he finds,</div>
    <div class="verse indent0">But with his learning drives it from our minds,</div>
    <div class="verse indent0">And he, a hero, shall with joyful eyes</div>
    <div class="verse indent0">See crowds of heroes all around him rise;</div>
    <div class="verse indent0">With great Minerva’s wisdom he shall rule</div>
    <div class="verse indent0">Those boisterous youths—the rector’s class at school,</div>
    <div class="verse indent0">And when in the fifth class begins his power,</div>
    <div class="verse indent0">And he begins to teach us, from that hour</div>
    <div class="verse indent0">Dame Poetry begins to show her face,</div>
    <div class="verse indent0">And witty epigrams the plaster grace;</div>
    <div class="verse indent0">There growing wild are often to be seen</div>
    <div class="verse indent0">The names of boys that Duxes erst have been,</div>
    <div class="verse indent0">And at the chimney-piece is seen the same</div>
    <div class="verse indent0">All thickly scribbled with the boobie’s name.</div>
  </div>
</div>
</div>

<hr class="r5">

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Ne’er shall the dreadful tawse be heard again,</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">The lash resounding, and the cry of pain;</div>
    <div class="verse indent0">Carmichael’s self will change (O that he would!)</div>
    <div class="verse indent0">From the imperative to wishing mood;</div>
    <div class="verse indent0">Ye years roll on, and haste the expected time</div>
    <div class="verse indent0">When flogging boys shall be accounted crime.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But come, thy real nature let us see,</div>
    <div class="verse indent0">No more the rector but the goddess be,<span class="pagenum" id="Page_579">[Pg 579]</span></div>
    <div class="verse indent0">Come in thy might and shake the deep profound,</div>
    <div class="verse indent0">Let the Academy with shouts resound.</div>
    <div class="verse indent0">While radiant glory all thy head adorns,</div>
    <div class="verse indent0">And slippers on thy feet protect thy corns;</div>
    <div class="verse indent0">O may I live so long on earth below,</div>
    <div class="verse indent0">That I may learn the things that thou dost know!</div>
    <div class="verse indent0">Then will I praise thee in heroic verse</div>
    <div class="verse indent0">So good that Linus’ will be counted worse;</div>
    <div class="verse indent0">The Thracian Orpheus never will compare</div>
    <div class="verse indent0">With me, nor Dods that got the prize last year.</div>
    <div class="verse indent0">But stay, O stay upon this earth a while,</div>
    <div class="verse indent0">Even now thou seest the world’s approving smile,</div>
    <div class="verse indent0">And when thou goest to taste celestial joys,</div>
    <div class="verse indent0">Let thy great nephew<a id="FNanchor_261" href="#Footnote_261" class="fnanchor">[261]</a> teach the mourning hoys,</div>
    <div class="verse indent0">Then mounting to the skies upon the wind,</div>
    <div class="verse indent0">Lead captive ignorance in chains behind.</div>
  </div>
</div>
</div>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">TORTO VOLITANS SUB VERBERE TURBO</div>
    <div class="verse indent0">QUEM PUERI MAGNO IN GYRO VACUA ATRIA CIRCUM</div>
    <div class="verse indent0">INTENTI LUDO EXERCENT.</div>
    <div class="verse indent14"><i>Virgil, Æn. VII. 378.</i></div>
    <div class="verse indent22"><i>Nov. 1844</i></div>
  </div>
</div>
</div>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">OF pearies<a id="FNanchor_262" href="#Footnote_262" class="fnanchor">[262]</a> and their origin I sing:</div>
    <div class="verse indent0">How at the first great Jove the lord of air</div>
    <div class="verse indent0">Impelled the planets round the central sun</div>
    <div class="verse indent0">Each circling within each, until at last</div>
    <div class="verse indent0">The winged Mercury moves in molten fire.</div>
    <div class="verse indent0">And which of you, ye heavenly deities,</div>
    <div class="verse indent0">That hear the endless music of the spheres,</div>
    <div class="verse indent0">Hast given to man the secret of the Top?</div>
    <div class="verse indent0">Say, was it thou, O Fun, that dost prefer,</div>
    <div class="verse indent0">Before all temples, liberty and play?</div>
    <div class="verse indent0">Yes, yes, ’twas only thou, thou from the first</div>
    <div class="verse indent0">Wast present when the Roman children came</div>
    <div class="verse indent0">To the smooth pavement, where with heavy lash</div>
    <div class="verse indent0">They chased the wooden plaything without end.<span class="pagenum" id="Page_580">[Pg 580]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent2">But not to tell of these is now my task,</div>
    <div class="verse indent0">Nor yet of humming-tops, whose lengthened neck,</div>
    <div class="verse indent0">With packthread bound, and handle placed above,</div>
    <div class="verse indent0">Amuses little children. Not of these,</div>
    <div class="verse indent0">But of the pearie, chief of all his tribe,</div>
    <div class="verse indent0">Do I now sing. He with a sudden bound</div>
    <div class="verse indent0">From out his station in the player’s hand</div>
    <div class="verse indent0">Descends like Maia’s son, on one foot poised,</div>
    <div class="verse indent0">And utters gentle music circling round,</div>
    <div class="verse indent0">Till in the centre of the ring it sleeps.</div>
    <div class="verse indent2">When lo, as in the bright blue vault of heaven</div>
    <div class="verse indent0">A falcon, towering in his pride of place</div>
    <div class="verse indent0">Perceives from far a partridge on the wing,</div>
    <div class="verse indent0">And stoops to seize him, even so comes down</div>
    <div class="verse indent0">Another pearie, and as when the sword</div>
    <div class="verse indent0">Of faithful Abdiel struck the apostate’s crest</div>
    <div class="verse indent0">And “sent him reeling back ten paces huge,”</div>
    <div class="verse indent0">So reeled the former pearie, nor can stand</div>
    <div class="verse indent0">The latter’s iron peg, and more come down;</div>
    <div class="verse indent0">Innumerable hosts of pearies, armed</div>
    <div class="verse indent0">With dire destructive steel. The players shout;</div>
    <div class="verse indent0">It is the shout of battle; the loud cry</div>
    <div class="verse indent0">Of victors rushing to the spoil; the wail</div>
    <div class="verse indent0">Of ruined boys, their pearie split, and all,</div>
    <div class="verse indent0">All lost.</div>
    <div class="verse indent10">Thus wags this ever-changing world,</div>
    <div class="verse indent0">And we may morals from the pearie draw.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">(NATHALOCUS.)</p>

<p class="right"><i>Jan. 1845.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">BLEAK was the pathway and barren the mountain,</div>
    <div class="verse indent2">As the traveller passed on his wearisome way;</div>
    <div class="verse indent0">Sealed by the frost was each murmuring fountain,</div>
    <div class="verse indent2">And the sun shone through mist with a blood-coloured ray.</div>
    <div class="verse indent0">But neither the road nor the danger together,</div>
    <div class="verse indent0">Could alter his purpose, nor yet the rough weather;</div>
    <div class="verse indent0">So on went the wayfarer through the thick heather,</div>
    <div class="verse indent2">Till he came to the cave where the dread witches stay.<span class="pagenum" id="Page_581">[Pg 581]</span></div>
  </div>
  <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">Hewn from the rock was that cavern so dreary,</div>
    <div class="verse indent2">And the entrance by bushes was hid from the sight,</div>
    <div class="verse indent0">But he found his way in, and with travelling weary,</div>
    <div class="verse indent2">With joy he beheld in the darkness a light</div>
    <div class="verse indent0">And in a recess of that wonderful dwelling,</div>
    <div class="verse indent0">He heard the strange song of the witch wildly swelling,</div>
    <div class="verse indent0">In magical numbers unceasingly telling</div>
    <div class="verse indent2">The fortunes of kingdoms, the issue of fight.</div>
  </div>
  <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">Up rose the witch as the traveller entered,</div>
    <div class="verse indent1">“Welcome,” she said, “and what news from the king;</div>
    <div class="verse indent0">And why to inquire of me thus has he ventured,</div>
    <div class="verse indent2">When he knows that the answer destruction will bring?</div>
    <div class="verse indent0">Sit here and attend.” Then her pale visage turning</div>
    <div class="verse indent0">To where the dim lamp in the darkness was burning,</div>
    <div class="verse indent0">She took up a book of her magical learning,</div>
    <div class="verse indent2">And prepared in prophetical numbers to sing.</div>
  </div>
  <div class="poetry-container">IV.</div>
  <div class="stanza">
    <div class="verse indent0">Now she is seated, the curtain is o’er her,</div>
    <div class="verse indent2">The god is upon her; attend then and hear!</div>
    <div class="verse indent0">The vapour is rising in volumes before her,</div>
    <div class="verse indent2">And forms of the future in darkness appear.</div>
    <div class="verse indent0">Hark, now the god inspiration is bringing,</div>
    <div class="verse indent0">’Tis not her voice through the cavern is ringing;</div>
    <div class="verse indent0">No, for the song her familiar is singing,</div>
    <div class="verse indent2">And these were the words of the maddening seer.</div>
  </div>
  <div class="poetry-container">V.</div>
  <div class="stanza">
    <div class="verse indent0">“Slave of the monarch, return to thy master,</div>
    <div class="verse indent2">Whisper these words in Nathalocus’ ear;</div>
    <div class="verse indent0">Tell him, from me, that Old Time can fly faster</div>
    <div class="verse indent2">Than he is aware, for his death hour is near;</div>
    <div class="verse indent0">Tell him his fate with the mystery due it,</div>
    <div class="verse indent0">But let him not know of the hand that shall do it<span class="pagenum" id="Page_582">[Pg 582]</span></div>
    <div class="verse indent0">“Tell me, vile witch, or I swear thou shalt rue it!”</div>
    <div class="verse indent2">“Thou art the murderer,” answered the seer.</div>
  </div>
  <div class="poetry-container">VI.</div>
  <div class="stanza">
    <div class="verse indent0">“Am I a dog that I’d do such an action!”</div>
    <div class="verse indent2">Answered the chief as in anger he rose,</div>
    <div class="verse indent0">“Would I, ungrateful, be head of a faction.</div>
    <div class="verse indent2">And call myself one of Nathalocus’ foes?”</div>
    <div class="verse indent0">“No more,” said the witch, “the enchantment is ended,</div>
    <div class="verse indent0">I brave not the wrath of the demon offended,</div>
    <div class="verse indent0">Whatever thy fate, ’tis not now to be mended.”</div>
    <div class="verse indent2">So the stranger returned through the thick-driving snows.</div>
  </div>
  <div class="poetry-container">VII.</div>
  <div class="stanza">
    <div class="verse indent0">High from his eyrie the eagle was screaming,</div>
    <div class="verse indent2">Pale sheeted spectres stalked over the heath;</div>
    <div class="verse indent0">Bright in his mind’s eye a dagger was gleaming,</div>
    <div class="verse indent2">Waiting the moment to spring from its sheath.</div>
    <div class="verse indent0">Hoarse croaked the raven that eastward was flying;</div>
    <div class="verse indent0">Well did he know of the king that was dying;</div>
    <div class="verse indent0">Down in the river the Kelpie was sighing,</div>
    <div class="verse indent2">Mourning the king in the water beneath.</div>
  </div>
  <div class="poetry-container">VIII.</div>
  <div class="stanza">
    <div class="verse indent0">His mind was confused with this terrible warning,</div>
    <div class="verse indent0">Horrible spectres were with him by night;</div>
    <div class="verse indent0">Still in his sorrow he wished for the morning,</div>
    <div class="verse indent0">Cursing the day when he first saw the light.</div>
    <div class="verse indent0">He said in his raving, “The day that she bore me,</div>
    <div class="verse indent0">Would that my mother in pieces had tore me;</div>
    <div class="verse indent0">See there is Nathalocus’ body before me;</div>
    <div class="verse indent0">Hence, ye vain shadows, depart from my sight!”</div>
  </div>
  <div class="poetry-container">IX.</div>
  <div class="stanza">
    <div class="verse indent0">And when from the palace the king sent to meet him,</div>
    <div class="verse indent2">To ask what response from the witch he might bear;</div>
    <div class="verse indent0">When the messenger thought that the strangerwould greet him,</div>
    <div class="verse indent2">He answered by nought but a meaningless stare.<span class="pagenum" id="Page_583">[Pg 583]</span></div>
    <div class="verse indent0">On his face was a smile, but it was not of gladness,</div>
    <div class="verse indent0">For all was within inconsolable sadness.</div>
    <div class="verse indent0">And aye in his eye was the fixt glare of madness,—</div>
    <div class="verse indent2">“In the long’s private chamber, I’ll answer him there.”</div>
  </div>
  <div class="poetry-container">X.</div>
  <div class="stanza">
    <div class="verse indent0">“Tell me, my sovereign, have I been unruly;</div>
    <div class="verse indent2">Have I been ever found out of my place;</div>
    <div class="verse indent0">Have not I followed thee faithfully, truly,</div>
    <div class="verse indent2">Though danger and death stared me full in the face?</div>
    <div class="verse indent0">Have I been seen from the enemy flying,</div>
    <div class="verse indent0">Have I been wanting in danger most trying?</div>
    <div class="verse indent0">Oh, if I have, judge me worthy of dying,</div>
    <div class="verse indent2">Let me be covered with shame and disgrace!</div>
  </div>
  <div class="poetry-container">XI.</div>
  <div class="stanza">
    <div class="verse indent0">“Couldst thou imagine that I should betray thee,</div>
    <div class="verse indent2">I whom thy bounty with friendship has blessed?</div>
    <div class="verse indent0">But the witch gave for answer that my hand should slay thee,</div>
    <div class="verse indent2">’Tis this that for long has deprived me of rest,</div>
    <div class="verse indent0">Ever since then have my slumbers been broken,</div>
    <div class="verse indent0">But true are the words that the prophet has spoken,</div>
    <div class="verse indent0">Nathalocus, now receive this as a token,”</div>
    <div class="verse indent2">So saying the dagger he plunged in his breast.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">The Death of Sir James, Lord of Douglas.</span></p>

<p class="nindc">
<i>Prize Poem</i>, July 1845.<a id="FNanchor_263" href="#Footnote_263" class="fnanchor">[263]</a> <i>Æt.</i> 14.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“Men may weill wyt, thouch nane thaim tell,</div>
    <div class="verse indent0">How angry for sorow, and how fell,</div>
    <div class="verse indent0">Is to tyne sic a Lord as he</div>
    <div class="verse indent0">To thaim that war off hys mengye.”</div>
    <div class="verse indent14">Barbour’s <i>Bruce</i>, B. XX. i. 507.</div>
</div>
</div>
</div>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">WHERE rich Seville’s proud turrets rise</div>
    <div class="verse indent0">A foreign ship at anchor lies;<span class="pagenum" id="Page_584">[Pg 584]</span></div>
    <div class="verse indent0">The pennons, floating in the air.</div>
    <div class="verse indent0">Proclaim that one of rank is there—</div>
    <div class="verse indent0">The Douglas, with a gallant band</div>
    <div class="verse indent0">Of warriors, seeks the Holy Land.</div>
    <div class="verse indent0">But wherefore now the trumpet’s bray,</div>
    <div class="verse indent0">The clang of arms and war’s array,</div>
    <div class="verse indent0">The atabal and martial drum?</div>
    <div class="verse indent0">The Moor—the infidel is come;</div>
    <div class="verse indent0">And there is Sultan Osmyn—see!</div>
    <div class="verse indent0">With all his Paynim chivalry;</div>
    <div class="verse indent0">And they have sworn to glut their steel</div>
    <div class="verse indent0">With the best blood of fair Castile.</div>
    <div class="verse indent0">“And do we here inactive stand?”</div>
    <div class="verse indent0">The Douglas cries; “Land! comrades, land!”</div>
    <div class="verse indent0">Then for the Christian camp he makes,</div>
    <div class="verse indent0">When thus Alphonso silence breaks:</div>
    <div class="verse indent0">“What news from Scotland do you bring;</div>
    <div class="verse indent0">And where is now your patriot king?”</div>
    <div class="verse indent0">“Alas! within this casket lies</div>
    <div class="verse indent0">The heart so valiant, good, and wise,</div>
    <div class="verse indent0">This to the Holy Land we bear,</div>
    <div class="verse indent0">For we have sworn to lay it there.</div>
    <div class="verse indent0">But let us forward to the fight,</div>
    <div class="verse indent0">And God protect the Christian right!”</div>
    <div class="verse indent0">To whom Alphonso—“Scottish lord,</div>
    <div class="verse indent0">That now for Spain dost draw that sword,</div>
    <div class="verse indent0">The terror of thy English foes,</div>
    <div class="verse indent0">When for her freedom Scotland rose;</div>
    <div class="verse indent0">With knights like thee and thy brave band</div>
    <div class="verse indent0">We’ll drive the Moslem from the land.”</div>
    <div class="verse indent0">The Douglas thus his comrades cheers—</div>
    <div class="verse indent0">“Be brave! and as for him that fears,</div>
    <div class="verse indent0">Let the base coward turn and fly,</div>
    <div class="verse indent0">For we will gain the day, or die.</div>
    <div class="verse indent0">How couch the trusty Scottish spear,</div>
    <div class="verse indent0">And think King Robert’s heart is here,</div>
    <div class="verse indent0">And boldly charge—already, see</div>
    <div class="verse indent0">The dogs of Moslems turn and flee.”</div><span class="pagenum" id="Page_585">[Pg 585]</span>
    <div class="verse indent0">At the first onset, with the slain</div>
    <div class="verse indent0">Those valiant warriors strew the plain;</div>
    <div class="verse indent0">But, hark! the Allah Hu! the foes</div>
    <div class="verse indent0">Rally, and hot the combat grows,</div>
    <div class="verse indent0">For here the Spaniards yield, and there</div>
    <div class="verse indent0">The Moors have slain the brave St. Clair.</div>
    <div class="verse indent0">Then, midst the thickest of his foes,</div>
    <div class="verse indent0">The precious casket Douglas throws—</div>
    <div class="verse indent0">“Pass on before us,” hear him cry,</div>
    <div class="verse indent0">“For I will follow thee, or die.”</div>
    <div class="verse indent0">He rushes on—but all in vain,</div>
    <div class="verse indent0">For thicker comes the arrowy rain;</div>
    <div class="verse indent0">And now, by multitudes opprest,</div>
    <div class="verse indent0">With many a wound upon his breast.</div>
    <div class="verse indent0">Where ’midst the slain the casket lies,</div>
    <div class="verse indent0">A noble death the Douglas dies.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
The Vampyre.<a id="FNanchor_264" href="#Footnote_264" class="fnanchor">[264]</a></p>

<p class="nindc"><i>Compylt into Meeter by James Clerk Maxwell</i> [1845.]</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">THAIR is a knichte rydis through the wood,</div>
    <div class="verse indent2">And a douchty knichte is hee,</div>
    <div class="verse indent0">And sure hee is on a message sent,</div>
    <div class="verse indent2">He rydis sae hastilie.</div>
    <div class="verse indent0">Hee passit the aik, and hee passit the birk,</div>
    <div class="verse indent2">And hee passit monie a tre,</div>
    <div class="verse indent0">Bot plesant to him was the saugh sae slim,</div>
    <div class="verse indent2">For beneath it hee did see</div>
    <div class="verse indent0">The boniest ladye that ever he saw,</div>
    <div class="verse indent2">Scho was sae schyn and fair.</div>
    <div class="verse indent0">And there scho sat, beneath the saugh,</div>
    <div class="verse indent2">Kaiming hir gowden hair.</div>
    <div class="verse indent0">And then the knichte—“Oh ladye brichte,</div>
    <div class="verse indent2">What chance hes broucht you here,</div>
    <div class="verse indent0">But say the word, and ye schall gang</div>
    <div class="verse indent2">Back to your kindred dear.”<span class="pagenum" id="Page_586">[Pg 586]</span></div>
    <div class="verse indent0">Then up and spok the Ladye fair—</div>
    <div class="verse indent2">“I have nae friends or kin,</div>
    <div class="verse indent0">Bot in a littel boat I live,</div>
    <div class="verse indent2">Amidst the waves’ loud din.”</div>
    <div class="verse indent0">Then answered thus the douchty knichte—</div>
    <div class="verse indent2">“I’ll follow you through all,</div>
    <div class="verse indent0">For gin ye bee in a littel boat,</div>
    <div class="verse indent2">The world to it seemis small.”</div>
    <div class="verse indent0">They gaed through the wood, and through the wood</div>
    <div class="verse indent2">To the end of the wood they came:</div>
    <div class="verse indent0">And when they came to the end of the wood</div>
    <div class="verse indent2">They saw the salt sea faem.</div>
    <div class="verse indent0">And then they saw the wee, wee boat,</div>
    <div class="verse indent2">That daunced on the top of the wave,</div>
    <div class="verse indent0">And first got in the ladye fair,</div>
    <div class="verse indent2">And then the knichte sae brave;</div>
    <div class="verse indent0">They got into the wee, wee boat,</div>
    <div class="verse indent2">And rowed wi’ a’ their micht;</div>
    <div class="verse indent0">When the knichte sae brave, he turnit about,</div>
    <div class="verse indent2">And lookit at the ladye bricht;</div>
    <div class="verse indent0">He lookit at her bonie cheik.</div>
    <div class="verse indent2">And hee lookit at hir twa bricht eyne,</div>
    <div class="verse indent0">Bot hir rosie cheik growe ghaistly pale,</div>
    <div class="verse indent2">And scho seymit as scho deid had been.</div>
    <div class="verse indent0">The fause fause knichte growe pale wi frichte,</div>
    <div class="verse indent2">And his hair rose up on end,</div>
    <div class="verse indent0">For gane-by days cam to his mynde,</div>
    <div class="verse indent2">And his former luve he kenned.</div>
    <div class="verse indent0">Then spake the ladye,—“Thou, fause knichte,</div>
    <div class="verse indent2">Hast done to mee much ill,</div>
    <div class="verse indent0">Thou didst forsake me long ago,</div>
    <div class="verse indent2">Bot I am constant still;</div>
    <div class="verse indent0">For though I ligg in the woods sae cald,</div>
    <div class="verse indent2">At rest I canna bee</div>
    <div class="verse indent0">Until I sucke the gude lyfe blude</div>
    <div class="verse indent2">Of the man that gart me dee.”</div>
    <div class="verse indent0">Hee saw hir lipps were wet wi’ blude,</div>
    <div class="verse indent2">And hee saw hir lyfelesse eyne,<span class="pagenum" id="Page_587">[Pg 587]</span></div>
    <div class="verse indent0">And loud hee cry’d, “Get frae my syde,</div>
    <div class="verse indent2">Thou vampyr corps uncleane!”</div>
    <div class="verse indent0">Bot no, hee is in hir magic boat,</div>
    <div class="verse indent2">And on the wyde wyde sea;</div>
    <div class="verse indent0">And the vampyr suckis his gude lyfe blude,</div>
    <div class="verse indent2">Sho suckis hym till hee dee.</div>
    <div class="verse indent0">So now beware, whoe’re you are,</div>
    <div class="verse indent2">That walkis in this lone wood;</div>
    <div class="verse indent0">Beware of that deceitfull spright,</div>
    <div class="verse indent2">The ghaist that suckis the blude.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<span class="allsmcap">Seventh Ode of the Fourth Book of Horace.</span> 1846.</p>

<p class="nindc">(<i>In the metre of the original.</i>)</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">ALL the snows have fled, and grass springs up on the meadows,</div>
    <div class="verse indent12">And there are leaves on the trees:</div>
    <div class="verse indent0">Earth has changed her looks, and turbulent rivers decreasing,</div>
    <div class="verse indent12">Slowly meander along;</div>
    <div class="verse indent0">How, with the naked nymphs and her own twin sisters,</div>
    <div class="verse indent2">Aglaïa</div>
    <div class="verse indent12">Gracefully dances in time.</div>
    <div class="verse indent0">But the Year, and the Hours which hurry along our existence,</div>
    <div class="verse indent12">Solemnly warn us to die.</div>
    <div class="verse indent0">Zephyr removes the frost, and Summer, soon destined to perish,</div>
    <div class="verse indent12">Treads in the footsteps of Spring,</div>
    <div class="verse indent0">After the joyous reign of Autumn, abounding in apples,</div>
    <div class="verse indent12">Shivering Winter returns.</div>
    <div class="verse indent0">Heavenly waste is repaired by the moon in her quick revolutions,</div>
    <div class="verse indent12">But when we go to the grave,</div>
    <div class="verse indent0">Beside the pious Æneas, and rich old Tullus, and Ancus,</div>
    <div class="verse indent12">We are but dust and a shade.</div>
    <div class="verse indent0">Who knows if the gods above have determined whether to-morrow</div>
    <div class="verse indent12">We shall be living or dead.<span class="pagenum" id="Page_588">[Pg 588]</span></div>
    <div class="verse indent0">Nothing will come to the greedy hands of your spendthrift</div>
    <div class="verse indent2">successor</div>
    <div class="verse indent12">Which you have given away.</div>
    <div class="verse indent0">When you are gone to the grave, and Minos, sitting in judgment,</div>
    <div class="verse indent12">Utters your terrible doom,</div>
    <div class="verse indent0">Neither your rank nor your talents will bring you to life, 0</div>
    <div class="verse indent2">Torquatus,</div>
    <div class="verse indent12">Nor will affection avail;</div>
    <div class="verse indent0">Even the chaste Hippolytus was not released by Diana</div>
    <div class="verse indent12">From the infernal abyss,</div>
    <div class="verse indent0">Nor could Theseus break from his friend the rewards of</div>
    <div class="verse indent0">presumption</div>
    <div class="verse indent12">Which the stern monarch imposed.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Hor., Od. III. 9.</span> 1846.</p>

<p class="nindc">(<i>In the metre of the original.</i>)</p>

<div class="poetry-container">
<div class="poetry">
<div class="poetry-container"><i>Horace.</i></div>
  <div class="stanza">
    <div class="verse indent0"><span class="allsmcap">While</span> I was your beloved one,</div>
    <div class="verse indent0">And while no other youth threw his fond arms around</div>
    <div class="verse indent2">Your white neck so easily,</div>
    <div class="verse indent0">Than the King of the world I was far happier.</div>
  </div>
<div class="poetry-container"><i>Lydia.</i></div>
  <div class="stanza">
    <div class="verse indent0">While you loved not another one,</div>
    <div class="verse indent0">While you did not prefer Chloë to Lydia,</div>
    <div class="verse indent2">I then thought myself happier</div>
    <div class="verse indent0">Than the mother of Rome, great Rhea Silvia.</div>
  </div>
<div class="poetry-container"><i>Horace.</i></div>
  <div class="stanza">
    <div class="verse indent0">Thracian Chloë now governs me,</div>
    <div class="verse indent0">She can merrily sing, playing the cithara;</div>
    <div class="verse indent2">I’d not scruple to die for her,</div>
    <div class="verse indent0">If the Implacable spared Chloë, the auburn haired.<span class="pagenum" id="Page_589">[Pg 589]</span></div>
</div>
<div class="poetry-container"><i>Lydia.</i></div>
  <div class="stanza">
    <div class="verse indent0">I now love and am loved again,</div>
    <div class="verse indent0">By my Calaïs, son of the old Omytus;</div>
    <div class="verse indent2">Twice I’d die for him willingly.</div>
    <div class="verse indent0">If the terrible fates spared but my Calaïs.</div>
  </div>
<div class="poetry-container"><i>Horace.</i></div>
  <div class="stanza">
    <div class="verse indent0">What if love should return again,</div>
    <div class="verse indent0">And unite us by ties more indissoluble?</div>
    <div class="verse indent2">What if Chloë were cast away,</div>
    <div class="verse indent0">And the long-closèd door open to Lydia?</div>
  </div>
<div class="poetry-container"><i>Lydia.</i></div>
  <div class="stanza">
    <div class="verse indent0">My love’s brighter than any star;</div>
    <div class="verse indent0">You, too, lighter than cork, tossed on the waves of the</div>
    <div class="verse indent4">Hadriatic so terrible;</div>
    <div class="verse indent0">Still I’d live but with thee, and I could die with thee.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Horace, Seventh Epode.</span> 1846.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">WHITHER, whither, reckless Romans,</div>
    <div class="verse indent2">Are you rushing, sword in hand?</div>
    <div class="verse indent0">Has not yet the blood of brothers,</div>
    <div class="verse indent2">Fully stained the sea and land?</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Not that raging conflagration</div>
    <div class="verse indent2">Should o’er fallen Carthage play;</div>
    <div class="verse indent0">Not that the unconquered Briton</div>
    <div class="verse indent2">Should descend the sacred way.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Rome,” exclaims the joyful Parthian,</div>
    <div class="verse indent2">“Ruin for herself prepares;</div>
    <div class="verse indent0">Wolves with wolves are never savage,</div>
    <div class="verse indent2">Lion lion never tears.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Is this fury? is it madness?</div>
    <div class="verse indent2">Speedy answer I demand;</div>
    <div class="verse indent0">Foolish, blinded, guilty Romans,</div>
    <div class="verse indent2">Silent, stupefied you stand.<span class="pagenum" id="Page_590">[Pg 590]</span></div>
    <div class="verse indent0">Thus ’tis fated, blood of brothers</div>
    <div class="verse indent2">Must atone for brothers’ guilt,</div>
    <div class="verse indent0">Since the blood of injured Remus</div>
    <div class="verse indent2">Romulus in anger spilt.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
(<span class="allsmcap">An Onset.</span>) [1848.]</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">HALLO ye, my fellows! arise and advance,</div>
    <div class="verse indent0">See the white-crested waves how they stamp and they</div>
    <div class="verse indent0">dance!</div>
    <div class="verse indent0">High over the reef there in anger and might,</div>
    <div class="verse indent0">So wildly we dance to the bloody red fight.</div>
    <div class="verse indent0">Than gather, now gather, come gather ye all,</div>
    <div class="verse indent0">Each thing that hath legs and arms, come to our call;</div>
    <div class="verse indent0">Like reeds on the moor when the whirlwinds vie</div>
    <div class="verse indent0">Our lances and war-axes darken the sky;</div>
    <div class="verse indent0">Sharp, sharp, as the tooth of the sea-hound and shark,</div>
    <div class="verse indent0">They’ll tear ye, they’ll split ye, fly lance to the mark,</div>
    <div class="verse indent0">Home, home to the heart, and thou battle-axe grim,</div>
    <div class="verse indent0">Split, splintring and shivering through brain-pan and limb;</div>
    <div class="verse indent0">To-day we ask vengeance, to-day we ask blood,</div>
    <div class="verse indent0">We ask it; we’re coming to make our’ words good;</div>
    <div class="verse indent0">The storm flinches not tho’ the woods choke its path,</div>
    <div class="verse indent0">We ask it; we’re coming, beware of our wrath.</div>
    <div class="verse indent0">At home wives and children a hearth for us lay,</div>
    <div class="verse indent0">A savoury flesh-feast awaits us to-day;</div>
    <div class="verse indent0">Behind yonder mountains e’en now the smoke streams,</div>
    <div class="verse indent0">And the blaze of the bush fire crackles and gleams.</div>
    <div class="verse indent0">Long, long have we hungered and thirsted for you,</div>
    <div class="verse indent0">At home the dogs bark round the clean table too,</div>
    <div class="verse indent0">Loud shouting we’ll eat you to-night every one,</div>
    <div class="verse indent0">Devour you clean to the white sinewy bone.</div>
    <div class="verse indent0">Rush, rush ye my fellows, rush on them like hail,</div>
    <div class="verse indent0">Soon, soon shall their roasting your nostrils regale,</div>
    <div class="verse indent0">The fire is flaring, the oven’s a glow,</div>
    <div class="verse indent0">Heave to now, hew thro’ now, Holloa, Hollo.</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_591">[Pg 591]</span></p>
<p class="nindc space-above2">
(<span class="allsmcap">Song of the Edinburgh Academician.</span>) [1848.]</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">IF ony here has got an ear,</div>
    <div class="verse indent2">He’d better tak’ a haud o’ me,</div>
    <div class="verse indent0">Or I’ll begin, wi’ roarin’ din,</div>
    <div class="verse indent2">To cheer our old Academy.</div>
  </div>
  <div class="stanza">
    <div class="verse indent8">Dear old Academy,</div>
    <div class="verse indent8">Queer old Academy,</div>
    <div class="verse indent4">A merry lot we were, I wot,</div>
    <div class="verse indent8">When at the old Academy.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">There’s some may think me crouse wi’ drink,</div>
    <div class="verse indent2">And some may think it mad o’ me,</div>
    <div class="verse indent0">But ither some will gladly come</div>
    <div class="verse indent2">And cheer our old Academy.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Some set their hopes on Kings and Popes,</div>
    <div class="verse indent2">But, o’ the sons of Adam, he</div>
    <div class="verse indent0">Was first, without the smallest doubt,</div>
    <div class="verse indent2">That built the first Academy.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Let Pedants seek for scraps of Greek,</div>
    <div class="verse indent2">Their lingo to Macadamize;</div>
    <div class="verse indent0">Give me the sense, without pretence,</div>
    <div class="verse indent2">That comes o’ Scots Academies.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Let scholars all, both grit and small,</div>
    <div class="verse indent2">Of Learning mourn the sad demise;</div>
    <div class="verse indent0">That’s as they think, but we will drink</div>
    <div class="verse indent2">Good luck to Scots Academies.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Specimen of Translation from the Ajax of Sophocles.</span> 1852.</p>

<p class="nindc">(<i>Lines</i> 1192-1222.)</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0"><span class="allsmcap">O had</span> he first been swept away,</div>
    <div class="verse indent2">Through air by wild winds tossed,</div><span class="pagenum" id="Page_592">[Pg 592]</span>
    <div class="verse indent0">Or sunk from Heaven’s ethereal ray,</div>
    <div class="verse indent2">To Pluto’s dreary coast.</div>
    <div class="verse indent0">Who trained the Grecians to the field,</div>
    <div class="verse indent0">Taught them the sword, the spear to wield,</div>
    <div class="verse indent2">And steeled the gentle mind!</div>
    <div class="verse indent0">Hence toil gives birth to toil again,</div>
    <div class="verse indent0">Hence carnage stains the ensanguined plain,</div>
    <div class="verse indent2">For he destroyed mankind.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Nor the brow with chaplets bound,</div>
    <div class="verse indent0">Breathing balmy odours round,</div>
    <div class="verse indent0">Nor the social glow of soul,</div>
    <div class="verse indent0">Kindling o’er the generous bowl,</div>
    <div class="verse indent0">Nor the dulcet strain that rings</div>
    <div class="verse indent0">Jocund from the sounding strings,</div>
    <div class="verse indent0">Nor endearing love’s delight,</div>
    <div class="verse indent0">Which with rapture fills the night,</div>
    <div class="verse indent0">Me will he permit to prove,</div>
    <div class="verse indent0">He, alas! hath murdered love.</div>
    <div class="verse indent0">But neglected here I lie,</div>
    <div class="verse indent0">Open to the inclement sky;</div>
    <div class="verse indent0">And my rough and matted hair</div>
    <div class="verse indent0">Drinks the dews of night’s moist air.</div>
    <div class="verse indent2">Memorials sad of Troy.</div>
    <div class="verse indent0">Yet till now, when pale affright</div>
    <div class="verse indent0">Rolled her hideous form through night</div>
    <div class="verse indent0">Great in arms, thy shield to oppose,</div>
    <div class="verse indent0">Ajax at his rampire rose,</div>
    <div class="verse indent0">And my terror was no more.</div>
    <div class="verse indent0">Now the hero I deplore,</div>
    <div class="verse indent0">To the gloomy god consigned,</div>
    <div class="verse indent0">Now, what joy can touch the mind?</div>
    <div class="verse indent0">O that on the pine-clad brow,</div>
    <div class="verse indent0">Darkening o’er the sea below,</div>
    <div class="verse indent0">Where the cliffs of Sunium rise,</div>
    <div class="verse indent0">Rocky bulwarks to the skies,</div>
    <div class="verse indent0">I were placed—with sweet address</div>
    <div class="verse indent0">Sacred Athens would I bless,</div>
    <div class="verse indent2">And feel a social joy.</div>
  </div>
</div>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_261" href="#FNanchor_261" class="label">[261]</a> 
Mr. Theodore Williams, English Master in the Academy.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_262" href="#FNanchor_262" class="label">[262]</a> 
See <a href="#Page_51">p. 51.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_263" href="#FNanchor_263" class="label">[263]</a> 
<a href="#Page_69">P. 69.</a></p>

</div>

<p><span class="pagenum" id="Page_593">[Pg 593]</span></p>

<div class="footnote">

<p class="nind"><a id="Footnote_264" href="#FNanchor_264" class="label">[264]</a> 
<a href="#Page_69">P. 69.</a></p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h2 class="nobreak" id="II_OCCASIONAL_PIECES">II. OCCASIONAL PIECES.</h2>
</div>

<p class="nindc space-above2">
<span class="allsmcap">Reflex Musings:
Reflection from Various Surfaces.</span></p>

<p class="right"><i>18th April 1853.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">IN the dense entangled street,</div>
    <div class="verse indent2">Where the web of Trade is weaving,</div>
    <div class="verse indent0">Forms unknown in crowds I meet</div>
    <div class="verse indent2">Much of each and all believing;</div>
    <div class="verse indent2">Each his small designs achieving</div>
    <div class="verse indent0">Hurries on with restless feet,</div>
    <div class="verse indent2">While, through Fancy’s power deceiving,</div>
    <div class="verse indent0"><i>Self</i> in every form I greet.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Oft in yonder rocky dell</div>
    <div class="verse indent2">Neath the birches’ shadow seated,</div>
    <div class="verse indent0">I have watched the darksome well,</div>
    <div class="verse indent2">Where my stooping form, repeated,</div>
    <div class="verse indent2">Now advanced and now retreated</div>
    <div class="verse indent0">With the spring’s alternate swell,</div>
    <div class="verse indent2">Till destroyed before completed</div>
    <div class="verse indent0">As the big drops grew and fell.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">By the hollow mountain-side</div>
    <div class="verse indent2">Questions strange I shout for ever,</div>
    <div class="verse indent0">While the echoes far and wide</div>
    <div class="verse indent2">Seem to mock my vain endeavour;</div>
    <div class="verse indent2">Still I shout, for though they never</div>
    <div class="verse indent0">Cast my borrowed voice aside,</div>
    <div class="verse indent2">Words from empty words they sever—</div>
    <div class="verse indent0">Words of Truth from words of Pride.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Yes, the faces in the crowd,</div>
    <div class="verse indent2">And the wakened echoes, glancing</div>
    <div class="verse indent0">From the mountain, rocky browed,</div>
    <div class="verse indent2">And the lights in water dancing—</div><span class="pagenum" id="Page_594">[Pg 594]</span>
    <div class="verse indent2">Each, my wandering sense entrancing,</div>
    <div class="verse indent0">Tells me back my thoughts aloud,</div>
    <div class="verse indent2">All the joys of Truth enhancing</div>
    <div class="verse indent0">Crushing all that makes me proud.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">A Student’s Evening Hymn.</span></p>

<p class="right"><i>Cambridge, April 25, 1853.</i></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">NOW no more the slanting rays</div>
    <div class="verse indent2">With the mountain summits dally,</div>
    <div class="verse indent0">Now no more in crimson blaze</div>
    <div class="verse indent2">Evening’s fleecy cloudlets rally,</div>
    <div class="verse indent2">Soon shall Night from off the valley</div>
    <div class="verse indent0">Sweep that bright yet earthly haze,</div>
    <div class="verse indent0">And the stars most musically</div>
    <div class="verse indent2">Move in endless rounds of praise.</div>
  </div>
    <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">While the world is growing dim,</div>
    <div class="verse indent2">And the Sun is slow descending</div>
    <div class="verse indent0">Past the far horizon’s rim,</div>
    <div class="verse indent2">Earth’s low sky to heaven extending,</div>
    <div class="verse indent2">Let my feeble earth-notes, blending</div>
    <div class="verse indent0">With the songs of cherubim,</div>
    <div class="verse indent2">Through the same expanse ascending,</div>
    <div class="verse indent0">Thus renew my evening hymn.</div>
  </div>
    <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">Thou that fill’st our waiting eyes</div>
    <div class="verse indent2">With the food of contemplation,</div>
    <div class="verse indent0">Setting in thy darkened skies</div>
    <div class="verse indent2">Signs of infinite creation,</div>
    <div class="verse indent2">Grant to nightly meditation</div>
    <div class="verse indent0">What the toilsome day denies—</div>
    <div class="verse indent2">Teach me in this earthly station</div>
    <div class="verse indent0">Heavenly Truth to realise.<span class="pagenum" id="Page_595">[Pg 595]</span></div>
  </div>
    <div class="poetry-container">IV.</div>
  <div class="stanza">
    <div class="verse indent0">Give me wisdom so to use</div>
    <div class="verse indent2">These brief hours of thoughtful leisure,</div>
    <div class="verse indent0">That I may no instant lose</div>
    <div class="verse indent2">In mere meditative pleasure,</div>
    <div class="verse indent2">But with strictest justice measure</div>
    <div class="verse indent0">All the ends my life pursues,</div>
    <div class="verse indent2">Lies to crush and truths to treasure,</div>
    <div class="verse indent0">Wrong to shun and Right to choose.</div>
  </div>
    <div class="poetry-container">V.</div>
  <div class="stanza">
    <div class="verse indent0">Then, when unexpected Sleep,</div>
    <div class="verse indent2">O’er my long-closed eyelids stealing,</div>
    <div class="verse indent0">Opens up that lower deep</div>
    <div class="verse indent2">Where Existence has no feeling,</div>
    <div class="verse indent2">May sweet Calm, my languor healing,</div>
    <div class="verse indent0">Lend me strength at dawn to reap</div>
    <div class="verse indent2">All that Shadows, world-concealing,</div>
    <div class="verse indent0">For the bold enquirer keep.</div>
  </div>
    <div class="poetry-container">VI.</div>
  <div class="stanza">
    <div class="verse indent0">Through the creatures Thou hast made</div>
    <div class="verse indent2">Show the brightness of Thy glory,</div>
    <div class="verse indent0">Be eternal Truth displayed</div>
    <div class="verse indent2">In their substance transitory,</div>
    <div class="verse indent2">Till green Earth and Ocean hoary,</div>
    <div class="verse indent0">Massy rock and tender blade</div>
    <div class="verse indent2">Tell the same unending story—</div>
    <div class="verse indent0">“We are Truth in Form arrayed.”</div>
  </div>
    <div class="poetry-container">VII.</div>
  <div class="stanza">
    <div class="verse indent0">When to study I retire,</div>
    <div class="verse indent2">And from books of ancient sages</div>
    <div class="verse indent0">Glean fresh sparks of buried fire</div>
    <div class="verse indent2">Lurking in their ample pages—</div>
    <div class="verse indent2">While the task my mind engages</div>
    <div class="verse indent0">Let old words new truths inspire—</div>
    <div class="verse indent2">Truths that to all after-ages</div>
    <div class="verse indent0">Prompt the Thoughts that never tire.<span class="pagenum" id="Page_596">[Pg 596]</span></div>
  </div>
    <div class="poetry-container">VIII.</div>
  <div class="stanza">
    <div class="verse indent0">Yet if, led by shadows fair</div>
    <div class="verse indent2">I have uttered words of folly,</div>
    <div class="verse indent0">Let the kind absorbing air</div>
    <div class="verse indent2">Stifle every sound unholy.</div>
    <div class="verse indent2">So when Saints with Angels lowly</div>
    <div class="verse indent0">Join in heaven’s unceasing prayer,</div>
    <div class="verse indent2">Mine as certainly, though slowly,</div>
    <div class="verse indent0">May ascend and mingle there.</div>
  </div>
</div>
</div>

<p class="nindc"><i>Two stanzas omitted, the Author knows where, but not
to be inserted till he knows how.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">Teach me so Thy works to read</div>
    <div class="verse indent2">That my faith,—new strength accruing,—</div>
    <div class="verse indent0">May from world to world proceed,</div>
    <div class="verse indent2">Wisdom’s fruitful search pursuing;</div>
    <div class="verse indent2">Till, thy truth my mind imbuing,</div>
    <div class="verse indent0">I proclaim the Eternal Creed,</div>
    <div class="verse indent2">Oft the glorious theme renewing</div>
    <div class="verse indent0">God our Lord is God indeed.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Give me love aright to trace</div>
    <div class="verse indent2"><i>Thine</i> to everything created,</div>
    <div class="verse indent0">Preaching to a ransomed race</div>
    <div class="verse indent2">By Thy mercy renovated,</div>
    <div class="verse indent2">Till with all thy fulness sated</div>
    <div class="verse indent0">I behold thee face to face</div>
    <div class="verse indent2">And with Ardour unabated</div>
    <div class="verse indent0">Sing the glories of thy grace.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
(<span class="allsmcap">On St. David’s Day.</span><a id="FNanchor_265" href="#Footnote_265" class="fnanchor">[265]</a> <span class="allsmcap">To Mrs. E. C. Morrieson.</span>)</p>

<p class="right"><i>1st March 1854.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">’TWAS not chance but deep design,</div>
    <div class="verse indent0">Tho’ of whom I can’t divine</div>
    <div class="verse indent0">Made the courtly Valentine</div>
    <div class="verse indent4">(Corpulent saint and bishop)<span class="pagenum" id="Page_597">[Pg 597]</span></div>
    <div class="verse indent0">Such a time with Bob to stay:—</div>
    <div class="verse indent0">Let me now in bardish way</div>
    <div class="verse indent0">On your own St. David’s day</div>
    <div class="verse indent4">Toss you a simple dish up.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">’Tis a tale we learnt at school,—</div>
    <div class="verse indent0">Oft we broke domestic rule,</div>
    <div class="verse indent0">Standing till our brows were cool</div>
    <div class="verse indent4">In the forbidden lobby.<a id="FNanchor_266" href="#Footnote_266" class="fnanchor">[266]</a></div>
    <div class="verse indent0">There we talked and there we laughed,</div>
    <div class="verse indent0">Till the townsfolk thought us daft,</div>
    <div class="verse indent0">What of that? a thorough draft</div>
    <div class="verse indent4">Was and is still my hobby.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">To my tale: In ancient days,</div>
    <div class="verse indent0">Ere men left the good old ways,</div>
    <div class="verse indent0">Lived a lady whose just praise</div>
    <div class="verse indent4">Passes all fancied glory.</div>
    <div class="verse indent0">Rich was she in field and store,</div>
    <div class="verse indent0">Richer in the sons she bore,</div>
    <div class="verse indent0">How could she be honoured more?</div>
    <div class="verse indent4">Listen and hear the story.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">On a high and festive day</div>
    <div class="verse indent0">When the chariots bright and gay</div>
    <div class="verse indent0">To the temple far away</div>
    <div class="verse indent4">Passed in majestic order,—</div>
    <div class="verse indent0">When the hour was nigh at hand,</div>
    <div class="verse indent0">She who should have led the band</div>
    <div class="verse indent0">Found no oxen at command,</div>
    <div class="verse indent4">Searching through all her border.<a id="FNanchor_267" href="#Footnote_267" class="fnanchor">[267]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then her two sons brave and strong</div>
    <div class="verse indent0">Girt their limbs with band and thong,</div>
    <div class="verse indent0">And before the wondering throng</div>
    <div class="verse indent4">Drew their exulting mother.</div><span class="pagenum" id="Page_598">[Pg 598]</span>
    <div class="verse indent0">Swift and steady, on they came;</div>
    <div class="verse indent0">At the temple loud acclaim</div>
    <div class="verse indent0">Greeted that illustrious dame,</div>
    <div class="verse indent4">Blest above every other.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then, while triumph filled her breast,</div>
    <div class="verse indent0">Loud she prayed above the rest,</div>
    <div class="verse indent0">Give my sons whatever best</div>
    <div class="verse indent4">Man may receive from heaven.</div>
    <div class="verse indent0">To the shrine the brothers stept,</div>
    <div class="verse indent0">Low they bowed, they sunk, they slept,</div>
    <div class="verse indent0">Stillness o’er their brave limbs crept:—</div>
    <div class="verse indent4">Rest was the guerdon given.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Such the simple story told,</div>
    <div class="verse indent0">By a sage renowned of old,<a id="FNanchor_268" href="#Footnote_268" class="fnanchor">[268]</a></div>
    <div class="verse indent0">To a king<a id="FNanchor_269" href="#Footnote_269" class="fnanchor">[269]</a> whose fabled gold</div>
    <div class="verse indent4">Could not procure him learning.</div>
    <div class="verse indent0">Heathen was the sage indeed,</div>
    <div class="verse indent0">Yet his tale we gladly read,</div>
    <div class="verse indent0">Thro’ his dark and doubtful creed</div>
    <div class="verse indent4">Glimpses of Truth discerning.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">How no more the altar’s blaze</div>
    <div class="verse indent0">Glares athwart our worldly haze,</div>
    <div class="verse indent0">Warning men how evil ways</div>
    <div class="verse indent4">Lead to just tribulation.</div>
    <div class="verse indent0">How no more the temple stands.</div>
    <div class="verse indent0">Pointing out to godless lands</div>
    <div class="verse indent0">That which is not made with hands,</div>
    <div class="verse indent4">Even the whole Creation.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Ask no more, then, “what is best,</div>
    <div class="verse indent0">How shall those you love be blest,”</div>
    <div class="verse indent0">Ask at once, eternal Rest,</div>
    <div class="verse indent4">Peace and assurance giving.</div><span class="pagenum" id="Page_599">[Pg 599]</span>
    <div class="verse indent0">Rest of Life and not of death,</div>
    <div class="verse indent0">Rest in Love and Hope and Faith,</div>
    <div class="verse indent0">Till the God who gives their breath</div>
    <div class="verse indent4">Calls them to rest from living.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Recollections of Dreamland.</span></p>

<p class="right">
<i>Cambridge, June? 1856.</i><a id="FNanchor_270" href="#Footnote_270" class="fnanchor">[270]</a></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">ROUSE ye! torpid daylight-dreamers, cast yonr carking cares</div>
    <div class="verse indent4">away!</div>
    <div class="verse indent0">As calm air to troubled water, so my night is to your day;</div>
    <div class="verse indent0">All the dreary day you labour, groping after common sense,</div>
    <div class="verse indent0">And your eyes ye will not open on the night’s magnificence.</div>
    <div class="verse indent0">Ye would scoff were I to tell you how a guiding radiance</div>
    <div class="verse indent4">gleams</div>
    <div class="verse indent0">On the outer world of action from my inner world of dreams.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">When, with mind released from study, late I lay me down</div>
    <div class="verse indent4">to sleep,</div>
    <div class="verse indent0">From the midst of facts and figures, into boundless space I</div>
    <div class="verse indent4">leap;</div>
    <div class="verse indent0">For the inner world grows wider as the outer disappears,</div>
    <div class="verse indent0">And the soul, retiring inward, finds itself beyond the spheres.</div>
    <div class="verse indent0">Then, to this unbroken sameness, some fantastic dream</div>
    <div class="verse indent4">succeeds,</div>
    <div class="verse indent0">Vague emotions rise and ripen into thoughts and words and</div>
    <div class="verse indent4">deeds.</div>
    <div class="verse indent0">Old impressions, long forgotten, range themselves in Time</div>
    <div class="verse indent4">and Space,</div>
    <div class="verse indent0">Till I recollect the features of some once familiar place.</div>
    <div class="verse indent0">Then from valley into valley in my dreaming course I roam,</div>
    <div class="verse indent0">Till the wanderings of my fancy end, where they began, at</div>
    <div class="verse indent4">home.</div>
    <div class="verse indent0">Calm it lies in morning twilight, while each streamlet far</div>
    <div class="verse indent0">and wide</div>
    <div class="verse indent0">Still retains its hazy mantle, borrowed from the mountain’s</div>
    <div class="verse indent4">side;</div><span class="pagenum" id="Page_600">[Pg 600]</span>
    <div class="verse indent0">Every knoll is now an island, every wooded bank a shore,</div>
    <div class="verse indent0">To the lake of quiet vapour that has spread the valley o'er.</div>
    <div class="verse indent0">Sheep are couched on every hillock, waiting till the morning</div>
    <div class="verse indent4">dawns,</div>
    <div class="verse indent0">Hares are on their early rambles, limping o’er the dewy</div>
    <div class="verse indent4">lawns.</div>
    <div class="verse indent0">All within the house is silent, darkened all the chambers</div>
    <div class="verse indent4">seem,</div>
    <div class="verse indent0">As with noiseless step I enter, gliding onwards in my</div>
    <div class="verse indent4">dream.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">What! has Time run out his cycle, do the years return</div>
    <div class="verse indent4">again?</div>
    <div class="verse indent0">Are there treasure-caves in Dreamland where departed days</div>
    <div class="verse indent4">remain?</div>
    <div class="verse indent0">I have leapt the bars of distance—left the life that late I</div>
    <div class="verse indent4">led—</div>
    <div class="verse indent0">I remember years and labours as a tale that I have read;</div>
    <div class="verse indent0">Yet my heart is hot within me, for I feel the gentle power</div>
    <div class="verse indent0">Of the spirits that still love me, waiting for this sacred hour.</div>
    <div class="verse indent0">Yes,—I know the forms that meet me are but phantoms of</div>
    <div class="verse indent4">the brain,</div>
    <div class="verse indent0">For they walk in mortal bodies, and they have not ceased</div>
    <div class="verse indent4">from pain.</div>
    <div class="verse indent0">Oh! those signs of human weakness, left behind for ever</div>
    <div class="verse indent4">now,</div>
    <div class="verse indent0">Dearer far to me than glories round a fancied seraph’s brow.</div>
    <div class="verse indent0">Oh! the old familiar voices! Oh! the patient waiting eyes!</div>
    <div class="verse indent0">Let me live with them in dreamland, while the world in</div>
    <div class="verse indent4">slumber lies!</div>
    <div class="verse indent0">For by bonds of sacred honour will they guard my soul in</div>
    <div class="verse indent4">sleep</div>
    <div class="verse indent0">From the spells of aimless fancies, that around my senses</div>
    <div class="verse indent4">creep.</div>
    <div class="verse indent0">They will link the past and present into one continuous life,</div>
    <div class="verse indent0">While I feel their hope, their patience, nerve me for the</div>
    <div class="verse indent4">daily strife.<span class="pagenum" id="Page_601">[Pg 601]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">For it is not all a fancy that our lives and theirs are one,</div>
    <div class="verse indent0">And we know that all we see is but an endless work begun.</div>
    <div class="verse indent0">Part is left in Nature’s keeping, part is entered into rest,</div>
    <div class="verse indent0">Part remains to grow and ripen, hidden in some living breast.</div>
    <div class="verse indent0">What is ours we know not, either when we wake or when</div>
    <div class="verse indent4">we sleep,</div>
    <div class="verse indent0">But we know that Love and Honour, day and night, are ours</div>
    <div class="verse indent4">to keep.</div>
    <div class="verse indent0">What though Dreams be wandering fancies, by some lawless</div>
    <div class="verse indent4">force entwined,</div>
    <div class="verse indent0">Empty bubbles, floating upwards through the current of the</div>
    <div class="verse indent4">mind?</div>
    <div class="verse indent0">There are powers and thoughts within us, that we know not,</div>
    <div class="verse indent4">till they rise</div>
    <div class="verse indent0">Through the stream of conscious action from where Self in</div>
    <div class="verse indent4">secret lies.</div>
    <div class="verse indent0">But when Will and Sense are silent, by the thoughts that</div>
    <div class="verse indent4">come and go,</div>
    <div class="verse indent0">We may trace the rocks and eddies in the hidden depths</div>
    <div class="verse indent4">below.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Let me dream my dream till morning; let my mind run slow</div>
    <div class="verse indent4">and clear,</div>
    <div class="verse indent0">Free from all the world’s distraction, feeling that the Dead</div>
    <div class="verse indent4">are near,</div>
    <div class="verse indent0">Let me wake, and see my duty lie before me straight and</div>
    <div class="verse indent4">plain.</div>
    <div class="verse indent0">Let me rise refreshed, and ready to begin my work again.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">To the Air of “Lörelei.”</span></p>

<p class="right"><i>Aberdeen, January 1858.</i></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">ALONE on a hillside of heather,</div>
    <div class="verse indent2">I lay with dark thoughts in my mind,</div>
    <div class="verse indent0">In the midst of the beautiful weather</div>
    <div class="verse indent2">I was deaf, I was dumb, I was blind.</div><span class="pagenum" id="Page_602">[Pg 602]</span>
    <div class="verse indent0">I knew not the glories around me,</div>
    <div class="verse indent2">I counted the world as it seems,</div>
    <div class="verse indent0">Till a spirit of melody found me,</div>
    <div class="verse indent2">And taught me in visions and dreams.</div>
  </div>
    <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">For the sound of a chorus of voices</div>
    <div class="verse indent2">Came gathering up from below,</div>
    <div class="verse indent0">And I heard how all Nature rejoices,</div>
    <div class="verse indent2">And moves with a musical flow.</div>
    <div class="verse indent0">O strange! we are lost in delusion,</div>
    <div class="verse indent2">Our ways and doings are wrong,</div>
    <div class="verse indent0">We are drowning in<a id="FNanchor_271" href="#Footnote_271" class="fnanchor">[271]</a> wilful confusion,</div>
    <div class="verse indent2">The notes of that<a id="FNanchor_272" href="#Footnote_272" class="fnanchor">[272]</a> wonderful song.</div>
  </div>
    <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">But listen, what harmony holy</div>
    <div class="verse indent2">Is mingling its notes with our own!</div>
    <div class="verse indent0">The discord is vanishing slowly,</div>
    <div class="verse indent2">And melts in that dominant tone.</div>
    <div class="verse indent0">And they that have heard it can never</div>
    <div class="verse indent2">Return to confusion again,</div>
    <div class="verse indent0">Their voices are music for ever,</div>
    <div class="verse indent2">And join in the mystical strain.</div>
  </div>
    <div class="poetry-container">IV.</div>
  <div class="stanza">
    <div class="verse indent0">No mortal can<a id="FNanchor_273" href="#Footnote_273" class="fnanchor">[273]</a> utter the beauty</div>
    <div class="verse indent2">That dwells<a id="FNanchor_274" href="#Footnote_274" class="fnanchor">[274]</a> in the song that they sing;</div>
    <div class="verse indent0">They move in the pathway of duty,</div>
    <div class="verse indent2">They follow the steps of their King.</div>
    <div class="verse indent0">I would barter the world and its glory,</div>
    <div class="verse indent2">That vision of joy to prolong,</div>
    <div class="verse indent0">Or to hear and remember the story</div>
    <div class="verse indent2">That lies in the heart of their song.</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_603">[Pg 603]</span></p>

<p class="nindc space-above2">
<span class="allsmcap">“I’ve heard the rushing.”</span></p>

<p class="right"><i>Aberdeen, 1858.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">I’VE heard the rushing of mountain torrents, gushing</div>
    <div class="verse indent2">Down through the rocks, in a cataract of spray,</div>
    <div class="verse indent8">Onward to the ocean;</div>
    <div class="verse indent8">Swift seemed their motion,</div>
    <div class="verse indent2">Till, lost in the desert, they dwindled away.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">I’ve learnt the story of all human glory,</div>
    <div class="verse indent2">I’ve felt high resolves growing weaker every day,</div>
    <div class="verse indent8">Till cares, springing round me,</div>
    <div class="verse indent8">With creeping tendrils bound me,</div>
    <div class="verse indent2">And all I once hoped for was wearing fast away.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">I’ve seen the river rolling on for ever,</div>
    <div class="verse indent2">Silent and strong, without tumult or display.</div>
    <div class="verse indent8">In the desert arid,</div>
    <div class="verse indent8">Its waters never tarried,</div>
    <div class="verse indent2">Till far out at sea we still found them on their way.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Now no more weary we faint in deserts dreary,</div>
    <div class="verse indent2">Toiling alone till the closing of the day;</div>
    <div class="verse indent8">All now is righted,</div>
    <div class="verse indent8">Our souls flow on united,</div>
    <div class="verse indent2">Till the years and their sorrows have all died away.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">“Will you come along with me?</span>”</p>

<p class="right"><i>Aberdeen, 1858.</i></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">WILL you come along with me.</div>
    <div class="verse indent2">In the fresh spring-tide,</div>
    <div class="verse indent0">My comforter to be</div>
    <div class="verse indent2">Through the world so wide?</div>
    <div class="verse indent0">Will you come and learn the ways</div>
    <div class="verse indent0">A student spends his days,</div>
    <div class="verse indent0">On the bonny, bonny braes</div>
    <div class="verse indent2">Of our ain burnside?<span class="pagenum" id="Page_604">[Pg 604]</span></div>
  </div>
    <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">For the lambs will soon be here,</div>
    <div class="verse indent2">In the fresh spring-tide;</div>
    <div class="verse indent0">As lambs come every year</div>
    <div class="verse indent2">On our ain burnside.</div>
    <div class="verse indent0">Poor things, they will not stay,</div>
    <div class="verse indent0">But we will keep the day</div>
    <div class="verse indent0">When first we saw them play</div>
    <div class="verse indent2">On our ain burnside.</div>
  </div>
    <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">We will watch the budding trees</div>
    <div class="verse indent2">In the fresh spring-tide,</div>
    <div class="verse indent0">While the murmurs of the breeze</div>
    <div class="verse indent2">Through the branches glide.</div>
    <div class="verse indent0">Where the mavis builds her nest,</div>
    <div class="verse indent0">And finds both work and rest,</div>
    <div class="verse indent0">In the bush she loves the best,</div>
    <div class="verse indent2">On our ain burnside.</div>
  </div>
    <div class="poetry-container">IV.</div>
  <div class="stanza">
    <div class="verse indent0">And the life we then shall lead</div>
    <div class="verse indent2">In the fresh spring-tide,</div>
    <div class="verse indent0">Will make thee mine indeed,</div>
    <div class="verse indent2">Though the world be wide.</div>
    <div class="verse indent0">No stranger’s blame or praise</div>
    <div class="verse indent0">Shall turn us from the ways</div>
    <div class="verse indent0">That brought us happy days</div>
    <div class="verse indent2">On our ain burnside.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
“<span class="allsmcap">Why, when our sun shines clearest.</span>”</p>

<p class="right"><i>1858.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">WHY, when our sun shines clearest,</div>
    <div class="verse indent0">Why, when our hopes seem nearest,</div>
    <div class="verse indent0">Why, when our life feels dearest,</div>
    <div class="verse indent4">Rises a secret pain—</div><span class="pagenum" id="Page_605">[Pg 605]</span>
    <div class="verse indent0">Hope’s perfect mirror broken—</div>
    <div class="verse indent0">Shadows of things unspoken—</div>
    <div class="verse indent0">Why will not some sure token</div>
    <div class="verse indent2">Calm us to rest again?</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Mixed with all earthly blessing</div>
    <div class="verse indent0">Lingers the fear distressing—</div>
    <div class="verse indent0">Conscience within confessing</div>
    <div class="verse indent4">Nothing of ours is pure.</div>
    <div class="verse indent0">Still must such thoughts upbraid us,</div>
    <div class="verse indent0">Seeking our own to aid us;</div>
    <div class="verse indent0">God, not ourselves, hath made us;</div>
    <div class="verse indent4">Trusting in Him we’re sure.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus, from our sorrows gleaning</div>
    <div class="verse indent0">Thoughts of the world’s deep meaning,</div>
    <div class="verse indent0">Let us rejoice while leaning</div>
    <div class="verse indent4">Firm on our Father’s arm.</div>
    <div class="verse indent0">Now are we one for ever,</div>
    <div class="verse indent0">Joined so that none may sever,</div>
    <div class="verse indent0">Souls, so united, never</div>
    <div class="verse indent4">Faint through mischance or harm.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">To K. M. D.</span></p>

<p class="right"><i>Aberdeen, 1858.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">IN the buds, before they burst,</div>
    <div class="verse indent2">Leaves and flowers are moulded;</div>
    <div class="verse indent0">Closely pressed they lie at first,</div>
    <div class="verse indent2">Exquisitely folded.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Though no hope of change they felt,</div>
    <div class="verse indent2">Folded hard together,</div>
    <div class="verse indent0">Soon their sap begins to melt</div>
    <div class="verse indent2">In the warmer weather.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Till, when Life returns with Spring,</div>
    <div class="verse indent2">Through them softly stealing,</div>
    <div class="verse indent0">All their freshness forth they fling,</div>
    <div class="verse indent2">Hidden forms revealing.<span class="pagenum" id="Page_606">[Pg 606]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Who can fold those flowers again,</div>
    <div class="verse indent2">In the way he found them?</div>
    <div class="verse indent0">Or those spreading leaves restrain,</div>
    <div class="verse indent2">In the buds that bound them?</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Trust me, Spring is very near,</div>
    <div class="verse indent2">All the buds are swelling;</div>
    <div class="verse indent0">All the glory of the year</div>
    <div class="verse indent2">In those buds is dwelling.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">What the opened buds reveal</div>
    <div class="verse indent2">Tells us—Life is flowing;</div>
    <div class="verse indent0">What the buds, still shut, conceal,</div>
    <div class="verse indent2">We shall end in knowing.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Long I lingered in the bud,</div>
    <div class="verse indent2">Doubting of the season,</div>
    <div class="verse indent0">Winter’s cold had chilled my blood—</div>
    <div class="verse indent2">I was ripe for treason.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Now no more I doubt or wait,</div>
    <div class="verse indent2">All my fears are vanished,</div>
    <div class="verse indent0">Summer’s coming, dear, though late,</div>
    <div class="verse indent0">Fogs and frosts are banished.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
Tune, <i>Il Segreto per esser felice</i>.</p>

<p class="right"><i>24th March 1858.</i></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">THERE are some folks that say,</div>
    <div class="verse indent0">They have found out a way,</div>
    <div class="verse indent4">To be healthy and wealthy and wise—</div>
    <div class="verse indent0">“Let your thoughts be but few,</div>
    <div class="verse indent0">Do as other folk do,</div>
    <div class="verse indent4">And never be caught by surprise.</div>
    <div class="verse indent0">Let your motto be—Follow the fashion,</div>
    <div class="verse indent2">But let other people alone;</div><span class="pagenum" id="Page_607">[Pg 607]</span>
    <div class="verse indent0">Do not love them, nor hate them, nor care for their fate,</div>
    <div class="verse indent2">But keep a look out for your own.</div>
    <div class="verse indent0">Then what though the world may run riot,</div>
    <div class="verse indent2">Still playing at catch who catch can;</div>
    <div class="verse indent0">You may just eat your dinner in quiet,</div>
    <div class="verse indent2">And live like a sensible man.”</div>
  </div>
    <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">’Twere a beautiful thing,</div>
    <div class="verse indent0">Thus to sit like a king,</div>
    <div class="verse indent4">And talk of the world turning round,</div>
    <div class="verse indent0">If it were not that we,</div>
    <div class="verse indent0">Like all things that we see,</div>
    <div class="verse indent4">Are standing on moveable ground.</div>
    <div class="verse indent0">While we boast of our tranquil enjoyments,</div>
    <div class="verse indent2">The means of enjoyment are flown,</div>
    <div class="verse indent0">Both our joys and our pains, till there’s nothing remains,</div>
    <div class="verse indent2">But the tranquil repose of a stone.</div>
    <div class="verse indent0">The world may be utterly crazy,</div>
    <div class="verse indent2">And life may be labour in vain;</div>
    <div class="verse indent0">But I’d rather be silly than lazy,</div>
    <div class="verse indent2">And would not quit life for its pain.</div>
  </div>
    <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">In Nature I read</div>
    <div class="verse indent0">Quite a different creed,</div>
    <div class="verse indent4">There everything lives in the rest;</div>
    <div class="verse indent0">Each feels the same force,</div>
    <div class="verse indent0">As it moves in its course,</div>
    <div class="verse indent4">And all by one blessing are blest.</div>
    <div class="verse indent0">The end that we live for is single,</div>
    <div class="verse indent2">But we labour not therefore alone,</div>
    <div class="verse indent0">For together we feel how by wheel within wheel,</div>
    <div class="verse indent2">We are helped by a force not our own.</div>
    <div class="verse indent0">So we flee not the world and its dangers,</div>
    <div class="verse indent2">For He that has made it is wise,</div>
    <div class="verse indent0">He knows we are pilgrims and strangers.</div>
    <div class="verse indent2">And He will enlighten our eyes.</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_608">[Pg 608]</span></p>

<p class="nindc space-above2">(<span class="allsmcap">To his Wife.</span>)</p>

<p class="right"><i>1858.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0"><span class="allsmcap">Oft</span> in the night, from this lone room</div>
    <div class="verse indent2">I long to fly o’er land and sea,</div>
    <div class="verse indent0">To pierce the dark, dividing gloom,</div>
    <div class="verse indent2">And join myself to thee.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">And thou to me wouldst gladly fly,</div>
    <div class="verse indent2">I know thee well, my own true wife!</div>
    <div class="verse indent0">We feel, that when we live not nigh,</div>
    <div class="verse indent2">We lose the crown of life.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Yet soon I hope, at dead of night,</div>
    <div class="verse indent2">To meet where all is strange beside,</div>
    <div class="verse indent0">And mid the train’s resounding flight</div>
    <div class="verse indent2">To have thee by my side.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then shall I feel that thou art near,</div>
    <div class="verse indent2">Joined hand to hand and soul to soul;</div>
    <div class="verse indent0">Short will that happy night appear,</div>
    <div class="verse indent2">As through the dark we roll.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then shall the secret of the will,</div>
    <div class="verse indent2">That dares not enter into bliss;</div>
    <div class="verse indent0">That longs for love, yet lingers still,</div>
    <div class="verse indent2">Be solved in one long kiss.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">I, drinking deep of thy rich love,</div>
    <div class="verse indent2">Thou feeling all the strength of mine,</div>
    <div class="verse indent0">Our souls will rise in faith above</div>
    <div class="verse indent2">The cares which make us pine.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Till I give thee, thou giving me,</div>
    <div class="verse indent2">As that which either loves the best,</div>
    <div class="verse indent0">To Him that loved us both, that He</div>
    <div class="verse indent2">May take us to His rest.<span class="pagenum" id="Page_609">[Pg 609]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Wandering and weak are all our prayers,</div>
    <div class="verse indent2">And fleeting half the gifts we crave;</div>
    <div class="verse indent0">Love only, cleansed from sins and cares,</div>
    <div class="verse indent2">Shall live beyond the grave.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Strengthen our love, O Lord, that we</div>
    <div class="verse indent2">May in Thine own great love believe</div>
    <div class="verse indent0">And, opening all our soul to Thee,</div>
    <div class="verse indent2">May Thy free gift receive.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">All powers of mind, all force of will,</div>
    <div class="verse indent2">May lie in dust when we are dead,</div>
    <div class="verse indent0">But love is ours, and shall be still,</div>
    <div class="verse indent2">When earth and seas are fled.</div>
  </div>
</div>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_265" href="#FNanchor_265" class="label">[265]</a> 
See <a href="#Page_207">p. 207.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_266" href="#FNanchor_266" class="label">[266]</a> 
<a href="#Page_68">P. 68.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_267" href="#FNanchor_267" class="label">[267]</a> 
Herodotus, i. 31.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_268" href="#FNanchor_268" class="label">[268]</a> 
Solon.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_269" href="#FNanchor_269" class="label">[269]</a> 
Crœsus.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_270" href="#FNanchor_270" class="label">[270]</a> 
See <a href="#Page_249">p. 249.</a></p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_271" href="#FNanchor_271" class="label">[271]</a> 
<i>v.r.</i> marring with.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_272" href="#FNanchor_272" class="label">[272]</a> 
<i>v.r.</i> the.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_273" href="#FNanchor_273" class="label">[273]</a> 
<i>v.r.</i> may.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_274" href="#FNanchor_274" class="label">[274]</a> 
<i>v.r.</i> breathes through.</p>

</div>
</div>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<h2 class="nobreak" id="III_SERIO-COMIC_VERSE">III. SERIO-COMIC VERSE.</h2>
</div>

<p class="nindc space-above2">
“<span class="allsmcap">Numa Pompilius.</span>”</p>

<p class="nindc"><i>A Lay of Ancient Rome.</i></p>

<p class="right"><i>Junior Sophs' Exam.,<br>
Cambridge, December 1851.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">O WELL is thee! King Numa,</div>
    <div class="verse indent2">Within thy secret cave,</div>
    <div class="verse indent0">Where thy bones are ever moistened</div>
    <div class="verse indent2">By sad Egeria’s wave;</div>
    <div class="verse indent0">None now have power to pilfer</div>
    <div class="verse indent2">The treasure of thy tomb,</div>
    <div class="verse indent0">And reveal the institutions</div>
    <div class="verse indent2">And secret Rites of Rome.</div>
    <div class="verse indent0">O blessed be the Senate</div>
    <div class="verse indent2">That stowed those books away,</div>
    <div class="verse indent0">Curst be the attempt of Niebuhr</div>
    <div class="verse indent2">To drag them into day;</div>
    <div class="verse indent0">Light be the pressure, Numa,</div>
    <div class="verse indent2">Around thy watery bed,</div>
    <div class="verse indent0">May no perplexing problems</div>
    <div class="verse indent2">Infest thy kingly head!<span class="pagenum" id="Page_610">[Pg 610]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">As thus I blessed King Numa</div>
    <div class="verse indent2">And struggled hard with sleep,</div>
    <div class="verse indent0">I felt unwonted chillness</div>
    <div class="verse indent2">O’er all my members creep;</div>
    <div class="verse indent0">Before mine eyes in fragments</div>
    <div class="verse indent2">The fireplace seemed to roll,</div>
    <div class="verse indent0">The chillness left my body</div>
    <div class="verse indent2">And slid into my soul.</div>
    <div class="verse indent0">Deep in Egeria’s grotto</div>
    <div class="verse indent2">I saw the darksome well;</div>
    <div class="verse indent0">I slowly sunk to Numa,</div>
    <div class="verse indent2">But <i>why</i> I cannot tell.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“What! Livest thou still, old Sabine,</div>
    <div class="verse indent2">With thy mysterious wife?”</div>
    <div class="verse indent0">“Yes, here beneath the surface,</div>
    <div class="verse indent2">We lead a torpid life.</div>
    <div class="verse indent0">But little think the Critics</div>
    <div class="verse indent2">Who nullify old Rome,</div>
    <div class="verse indent0">That in these benumbing waters</div>
    <div class="verse indent2">I always lived at home.</div>
    <div class="verse indent0">Never was I a Sabine,</div>
    <div class="verse indent2">Or lived like men above;</div>
    <div class="verse indent0">No mortal wight was Numa,</div>
    <div class="verse indent2">Who quelled the fear of Jove.</div>
    <div class="verse indent0">Before my day the Romans</div>
    <div class="verse indent2">Served gods of wood and stone,</div>
    <div class="verse indent0">But what each man had fashioned</div>
    <div class="verse indent2">That worshipped he alone;</div>
    <div class="verse indent0">With care he saved the silver,</div>
    <div class="verse indent2">With pains the mould designed,</div>
    <div class="verse indent0">He loved and feared the offspring</div>
    <div class="verse indent2">Of his pocket and his mind.</div>
    <div class="verse indent0">To him he went for counsel</div>
    <div class="verse indent2">And then to Common Sense;</div>
    <div class="verse indent0">When both of these had failed him</div>
    <div class="verse indent2">He took to tossing pence;</div><span class="pagenum" id="Page_611">[Pg 611]</span>
    <div class="verse indent0">But I forbade all tossing,</div>
    <div class="verse indent2">Made men enquire of beasts,</div>
    <div class="verse indent0">Pulled down all private idols</div>
    <div class="verse indent2">And set up public priests.</div>
    <div class="verse indent0">‘Birds, too,’ said I, 'are holy,</div>
    <div class="verse indent2">They show us things to come,</div>
    <div class="verse indent0">They have more subtle spirits</div>
    <div class="verse indent2">Than wooden idols dumb.</div>
    <div class="verse indent0">No longer burn your incense</div>
    <div class="verse indent2">Before your private shrine,</div>
    <div class="verse indent0">My Vestals are most careful</div>
    <div class="verse indent2">To feed the flame divine;</div>
    <div class="verse indent0">Dismiss all fear of idols,</div>
    <div class="verse indent2">Of demons, and of gods,</div>
    <div class="verse indent0">My Augurs will protect you</div>
    <div class="verse indent2">With their long crooked rods.</div>
    <div class="verse indent0">(With such the careful shepherd</div>
    <div class="verse indent2">Drags lambs from ditches deep;</div>
    <div class="verse indent0">With such he points to heaven</div>
    <div class="verse indent2">When they are fast asleep.)</div>
    <div class="verse indent0">O, trust me, those same Augurs</div>
    <div class="verse indent2">Know more about the stars</div>
    <div class="verse indent0">Than you whose only business</div>
    <div class="verse indent2">Is everlasting wars.</div>
    <div class="verse indent0">How can you be religious,</div>
    <div class="verse indent2">How can they work for bread?</div>
    <div class="verse indent0">You sinners must be shriven,</div>
    <div class="verse indent2">My Augurs must be fed.</div>
    <div class="verse indent0"><i>You know</i> dividing labour</div>
    <div class="verse indent2">To nations riches brings,</div>
    <div class="verse indent0">So let my Augurs shrive you</div>
    <div class="verse indent2">While you mind earthly things.</div>
    <div class="verse indent0">Your case I’ve set before you,</div>
    <div class="verse indent2">You see the thing to do,</div>
    <div class="verse indent0">If you fork out the needful,</div>
    <div class="verse indent2">They do your job for you.'</div>
    <div class="verse indent0">With this and other speeches</div>
    <div class="verse indent2">I brought the people round,</div><span class="pagenum" id="Page_612">[Pg 612]</span>
    <div class="verse indent0">Till not a single Roman</div>
    <div class="verse indent2">In Jove’s house can be found.</div>
    <div class="verse indent0">For well he knows each evening</div>
    <div class="verse indent2">When hells in steeples toll,</div>
    <div class="verse indent0">’Tis a sign that well-paid Augurs</div>
    <div class="verse indent2">Are helping on his soul.</div>
    <div class="verse indent0">’Twas this that kept ’em quiet</div>
    <div class="verse indent2">Through all my fabled reign,</div>
    <div class="verse indent0">Till quarrelsome young Tullus</div>
    <div class="verse indent2">Brought battles back again.</div>
    <div class="verse indent0">Thus my cold-blooded doctrines</div>
    <div class="verse indent2">The fear of Jove could quell,</div>
    <div class="verse indent0">Wonder not then to find me</div>
    <div class="verse indent2">Alive here in a well.”</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">A Vision</span></p>

<p class="nindc">
<i>Of a Wrangler, of a University, of Pedantry, and of Philosophy.</i></p>

<p class="right"><i>10th November 1852.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">DEEP St. Mary’s bell had sounded,</div>
    <div class="verse indent0">And the twelve notes gently rounded</div>
    <div class="verse indent0">Endless chimneys that surrounded</div>
    <div class="verse indent12">My abode in Trinity.</div>
    <div class="verse indent0">(Letter G, Old Court, South Attics),</div>
    <div class="verse indent0">I shut up my mathematics,</div>
    <div class="verse indent0">That confounded hydrostatics—</div>
    <div class="verse indent12">Sink it in the deepest sea!</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">In the grate the flickering embers</div>
    <div class="verse indent0">Served to show how dull November’s</div>
    <div class="verse indent0">Fogs had stamped my torpid members,</div>
    <div class="verse indent12">Like a plucked and skinny goose.</div>
    <div class="verse indent0">And as I prepared for bed, I</div>
    <div class="verse indent0">Asked myself with voice unsteady,</div>
    <div class="verse indent0">If of all the stuff I read, I</div>
    <div class="verse indent12">Ever made the slightest use.<span class="pagenum" id="Page_613">[Pg 613]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Late to bed and early rising,</div>
    <div class="verse indent0">Ever luxury despising,</div>
    <div class="verse indent0">Ever training, never “sizing,”</div>
    <div class="verse indent12">I have suffered with the rest.</div>
    <div class="verse indent0">Yellow cheek and forehead ruddy,</div>
    <div class="verse indent0">Memory confused and muddy,</div>
    <div class="verse indent0">These are the effects of study</div>
    <div class="verse indent12">Of a subject so unblest.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Look beyond, and see the wrangler,</div>
    <div class="verse indent0">Now become a College dangler,</div>
    <div class="verse indent0">Court some spiritual angler,</div>
    <div class="verse indent12">Nibbling at his golden bait.</div>
    <div class="verse indent0">Hear him silence restive Reason,</div>
    <div class="verse indent0">Her advice is out of season,</div>
    <div class="verse indent0">While her lord is plotting treason</div>
    <div class="verse indent12">Gainst himself, and Church or State,</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">See him next with place and pension,</div>
    <div class="verse indent0">And the very best intention</div>
    <div class="verse indent0">Of upholding that Convention</div>
    <div class="verse indent12">Under which his fortunes rose.</div>
    <div class="verse indent0">Every scruple is rejected,</div>
    <div class="verse indent0">With his cherished schemes connected,</div>
    <div class="verse indent0">“Higher Powers may be neglected—</div>
    <div class="verse indent12"><i>His</i> result no further goes.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Much he lauds the education</div>
    <div class="verse indent0">Which has raised to lofty station,</div>
    <div class="verse indent0">Men, whose powers of calculation</div>
    <div class="verse indent12">Calculation’s self defied.</div>
    <div class="verse indent0">How the learned fool would wonder</div>
    <div class="verse indent0">Were he now to see his blunder,</div>
    <div class="verse indent0">When he put his reason under</div>
    <div class="verse indent12">The control of worldly Pride.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus I muttered, very seedy,</div>
    <div class="verse indent0">Husky was my throat, and reedy;</div>
    <div class="verse indent0">And no wonder, for indeed I</div>
    <div class="verse indent12">Now had caught a dreadful cold.</div><span class="pagenum" id="Page_614">[Pg 614]</span>
    <div class="verse indent0">Thickest fog had settled slowly</div>
    <div class="verse indent0">Bound the candle, burning lowly,</div>
    <div class="verse indent0">Bound the fire, where melancholy</div>
    <div class="verse indent12">Traced retreating hills of gold.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Still those papers lay before me—</div>
    <div class="verse indent0">Problems made express to bore me,</div>
    <div class="verse indent0">When a silent change came o’er me,</div>
    <div class="verse indent12">In my hard uneasy chair.</div>
    <div class="verse indent0">Fire and fog, and candle faded,</div>
    <div class="verse indent0">Spectral forms the room invaded,</div>
    <div class="verse indent0">Little creatures, that paraded</div>
    <div class="verse indent12">On the problems lying there.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Fathers there, of every college,</div>
    <div class="verse indent0">Led the glorious ranks of knowledge,</div>
    <div class="verse indent0">Men, whose virtues all acknowledge</div>
    <div class="verse indent12">Levied the proctorial fines;</div>
    <div class="verse indent0">There the modest Moderators,</div>
    <div class="verse indent0">Set apart as arbitrators</div>
    <div class="verse indent0">’Twixt contending calculators,</div>
    <div class="verse indent12">Scrutinised the trembling lines.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">All the costly apparatus,</div>
    <div class="verse indent0">That is meant to elevate us</div>
    <div class="verse indent0">To the intellectual status</div>
    <div class="verse indent12">Necessary for degrees—</div>
    <div class="verse indent0">College tutors—private coaches—</div>
    <div class="verse indent0">Line the Senate-house approaches.</div>
    <div class="verse indent0">If our Alma Mater dote, she’s</div>
    <div class="verse indent12">Taken care of well by these.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Much I doubted if the vision</div>
    <div class="verse indent0">Were the simple repetition</div>
    <div class="verse indent0">Of the statements of Commission,</div>
    <div class="verse indent12">Strangely jumbled, oddly placed.</div>
    <div class="verse indent0">When an awful form ascended,</div>
    <div class="verse indent0">And with cruel words defended</div>
    <div class="verse indent0">Those abuses that offended</div>
    <div class="verse indent12">My unsanctioned private taste.<span class="pagenum" id="Page_615">[Pg 615]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Angular in form and feature,</div>
    <div class="verse indent0">Unlike any earthly creature,</div>
    <div class="verse indent0">She had properties to meet your</div>
    <div class="verse indent12">Eye whatever you might view.</div>
    <div class="verse indent0">Hair of pens and skin of paper;</div>
    <div class="verse indent0">Breath, not breath but chemic vapour;</div>
    <div class="verse indent0">Dress,—such dress as College Draper</div>
    <div class="verse indent12">Fashions with precision due.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Eyes of glass, with optic axes</div>
    <div class="verse indent0">Twisting rays of light as flax is</div>
    <div class="verse indent0">Twisted, while the Parallax is</div>
    <div class="verse indent12">Made to show the real size.</div>
    <div class="verse indent0">Primary and secondary</div>
    <div class="verse indent0">Focal lines in planes contrary,</div>
    <div class="verse indent0">Sum up all that’s known to vary</div>
    <div class="verse indent12">In those dull, unmeaning eyes.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Such the eyes, through which all Nature</div>
    <div class="verse indent0">Seems reduced to meaner stature.</div>
    <div class="verse indent0">If you had them you would hate your</div>
    <div class="verse indent12">Symbolising sense of sight.</div>
    <div class="verse indent0">Seeing planets in their courses</div>
    <div class="verse indent0">Thick beset with arrowy “forces,”</div>
    <div class="verse indent0">While the common eye no more sees</div>
    <div class="verse indent12">Than their mild and quiet light.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Son,” she said (what could be queerer</div>
    <div class="verse indent0">Than thus tete-à-tete to hear her</div>
    <div class="verse indent0">Talk, in tones approaching nearer</div>
    <div class="verse indent12">To a saw’s than aught beside?</div>
    <div class="verse indent0">For the voice the spectre spoke in</div>
    <div class="verse indent0">Might be known by many a token</div>
    <div class="verse indent0">To proceed from metal, broken</div>
    <div class="verse indent12">When acoustic tricks were tried.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Little pleased to hear the Siren</div>
    <div class="verse indent0">“Own” me thus with voice of iron,</div>
    <div class="verse indent0">I had thoughts of just retiring</div>
    <div class="verse indent12">From a mother such a fright).<span class="pagenum" id="Page_616">[Pg 616]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“No,” she said, “the time is pressing,</div>
    <div class="verse indent0">So before I give my blessing,</div>
    <div class="verse indent0">I’ll excuse you from confessing</div>
    <div class="verse indent12">What you thought of me to-night.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Powers!” she cried, with hoarse devotion,</div>
    <div class="verse indent0">“Give my son the clearest notion</div>
    <div class="verse indent0">How to compass sure promotion,</div>
    <div class="verse indent12">And take care of Number One.</div>
    <div class="verse indent0">Let his college course be pleasant,</div>
    <div class="verse indent0">Let him ever, as at present,</div>
    <div class="verse indent0">Seem to have read what he hasn’t,</div>
    <div class="verse indent12">And to do what can’t be done.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Of the Philosophic Spirit</div>
    <div class="verse indent0">Richly may my son inherit;</div>
    <div class="verse indent0">As for Poetry, inter it</div>
    <div class="verse indent12">With the myths of other days.</div>
    <div class="verse indent0">“Cut the thing entirely, lest yon</div>
    <div class="verse indent0">College Don should put the question,</div>
    <div class="verse indent0">Why not stick to what you’re best on?</div>
    <div class="verse indent12">Mathematics always pays.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">As the Hag was thus proceeding</div>
    <div class="verse indent0">To prescribe my course of reading,</div>
    <div class="verse indent0">And as I was faintly pleading,</div>
    <div class="verse indent12">Hardly knowing what to say,</div>
    <div class="verse indent0">Suddenly, my head inclining</div>
    <div class="verse indent0">I beheld a light form shining;</div>
    <div class="verse indent0">And the withered beldam, whining,</div>
    <div class="verse indent12">Saw the same and slunk away.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then the vision, growing brighter,</div>
    <div class="verse indent0">Seemed to make my garret lighter;</div>
    <div class="verse indent0">As when noisome fogs of night are</div>
    <div class="verse indent12">Scattered by the rising sun.</div>
    <div class="verse indent0">Nearer still it grew and nearer,</div>
    <div class="verse indent0">Till my straining eyes caught clearer</div>
    <div class="verse indent0">Glimpses of a being dearer,</div>
    <div class="verse indent12">Dearer still than Number One.<span class="pagenum" id="Page_617">[Pg 617]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">In that well-remembered Vision</div>
    <div class="verse indent0">I was led to the decision</div>
    <div class="verse indent0">Still to hold in calm derision</div>
    <div class="verse indent12">Pedantry, however draped;</div>
    <div class="verse indent0">Since that artificial spectre</div>
    <div class="verse indent0">Proved a paltry sub-collector,</div>
    <div class="verse indent0">And had nothing to connect her</div>
    <div class="verse indent12">With the being whom she aped.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">I could never finish telling</div>
    <div class="verse indent0">You of her that has her dwelling</div>
    <div class="verse indent0">Where those springs of truth are welling,</div>
    <div class="verse indent12">Whence all streams of beauty run.</div>
    <div class="verse indent0">She has taught me that creation</div>
    <div class="verse indent0">Bears the test of calculation,</div>
    <div class="verse indent0">But that Man forgets his station</div>
    <div class="verse indent12">If he stops when that is done.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Is our algebra the measure</div>
    <div class="verse indent0">Of that unexhausted treasure</div>
    <div class="verse indent0">That affords the purest pleasure,</div>
    <div class="verse indent0">Ever found when it is sought?</div>
    <div class="verse indent12">Let us rather, realising</div>
    <div class="verse indent0">The conclusions thence arising</div>
    <div class="verse indent0">Nature more than symbols prizing,</div>
    <div class="verse indent12">Learn to worship as we ought.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Worship? Yes, what worship better</div>
    <div class="verse indent0">Than when free’d from every fetter</div>
    <div class="verse indent0">That the uninforming letter</div>
    <div class="verse indent12">Rivets on the tortured mind,</div>
    <div class="verse indent0">Man, with silent admiration</div>
    <div class="verse indent0">Sees the glories of Creation,</div>
    <div class="verse indent0">And, in holy contemplation,</div>
    <div class="verse indent12">Leaves the learned crowd behind!</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_618">[Pg 618]</span></p>

<p class="nindc space-above2">
<span class="allsmcap">TO F. W. F.</span></p>

<p class="right"><i>6th April 1853.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">FARRAR, when o’er Goodwin’s page</div>
    <div class="verse indent2">Late I found thee poring,</div>
    <div class="verse indent0">From the hydrostatic Sage</div>
    <div class="verse indent2">Leaky Memory storing,</div>
    <div class="verse indent0">Or when groaning yesterday</div>
    <div class="verse indent2">Needlessly distracted</div>
    <div class="verse indent0">By some bright erratic ray.</div>
    <div class="verse indent2">Through a sphere refracted,—</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then the quick words, oft suppressed,</div>
    <div class="verse indent2">In my fauces fluttered;</div>
    <div class="verse indent0">Thoughts not yet in language drest</div>
    <div class="verse indent2">Pleasing to be uttered.</div>
    <div class="verse indent0">He that neatly gilds the pill</div>
    <div class="verse indent2">Hides the drug but vainly,</div>
    <div class="verse indent0">So, in chance-sown words, I will</div>
    <div class="verse indent2">Speak the matter plainly.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Men there are, whose patient minds,</div>
    <div class="verse indent2">In one object centred,</div>
    <div class="verse indent0">Wait, till through their darkened blinds</div>
    <div class="verse indent2">Truth has burst and entered.</div>
    <div class="verse indent0">Then, that ray so barely caught</div>
    <div class="verse indent2">Joyfully absorbing,</div>
    <div class="verse indent0">They behold the realms of Thought</div>
    <div class="verse indent2">Into Science orbing.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus they wait, and thus they toil,</div>
    <div class="verse indent2">Thus they end in knowing,</div>
    <div class="verse indent0">Like good seed in kindly soil</div>
    <div class="verse indent2">Taking root and growing.</div>
    <div class="verse indent0">Men there are whose ambient souls,</div>
    <div class="verse indent2">In rapt Intuition,</div>
    <div class="verse indent0">Seize Creation as it rolls,</div>
    <div class="verse indent2">Whole, without partition.<span class="pagenum" id="Page_619">[Pg 619]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Not for them the darkened room,</div>
    <div class="verse indent2">Lens, and perforation;</div>
    <div class="verse indent0">Enemies are they to gloom,</div>
    <div class="verse indent2">Foes to Insulation.</div>
    <div class="verse indent0">Theirs the light of perfect Day,</div>
    <div class="verse indent2">Theirs the sense of Freedom;</div>
    <div class="verse indent0">Dungeons, and the tortured ray,</div>
    <div class="verse indent2">Serve for those that need ’em.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Song to them of right belongs,</div>
    <div class="verse indent2">Eloquently flowing;</div>
    <div class="verse indent0">Sweeping down time-honoured wrongs,</div>
    <div class="verse indent2">Surging, burning, glowing.</div>
    <div class="verse indent0">Songs in which all hearts rejoice,</div>
    <div class="verse indent2">Songs of ancient story;</div>
    <div class="verse indent0">Songs that fill a People’s voice</div>
    <div class="verse indent2">Marching on to glory.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus they live, and thus they love,</div>
    <div class="verse indent2">Thus they soar in singing;</div>
    <div class="verse indent0">Like glad larks in heaven above,</div>
    <div class="verse indent2">Dazzling courses winging—</div>
    <div class="verse indent0">Here, I prithee, turn thy mind</div>
    <div class="verse indent2">To a little fable</div>
    <div class="verse indent0">Of the fledged and rooted kind,</div>
    <div class="verse indent2">Bird and vegetable.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Pensive in his lowly nest</div>
    <div class="verse indent2">Once a Lark was lying;</div>
    <div class="verse indent0">Often did he heave his breast</div>
    <div class="verse indent2">Querulously sighing.</div>
    <div class="verse indent0">For he saw with envious eyes,</div>
    <div class="verse indent2">Pampered vegetation—</div>
    <div class="verse indent0">Cabbages of goodly size,</div>
    <div class="verse indent2">Swoll’n with emulation.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Till their self-infolded green</div>
    <div class="verse indent2">Tight crammed, wide distended,</div>
    <div class="verse indent0">Seemed in sphered pomp to mean</div>
    <div class="verse indent2">All that it pretended.</div><span class="pagenum" id="Page_620">[Pg 620]</span>
    <div class="verse indent0">Long he sought to win their place</div>
    <div class="verse indent2">In the Gardener’s favour;</div>
    <div class="verse indent0">Well he caught the silent grace</div>
    <div class="verse indent2">Of a plant’s behaviour.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">All was useless, he confest,</div>
    <div class="verse indent2">Earth for him unsuited;</div>
    <div class="verse indent0">Terror seized upon him, lest</div>
    <div class="verse indent2">He should there be rooted.</div>
    <div class="verse indent0">“Cabbages are cabbages,</div>
    <div class="verse indent2">Larks are larks,” he muttered;</div>
    <div class="verse indent0">Then, light springing in the breeze,</div>
    <div class="verse indent2">Through the sky he fluttered.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Farrar, mark my fable well,</div>
    <div class="verse indent2">Fling away Ambition;</div>
    <div class="verse indent0">By that sin the angels fell</div>
    <div class="verse indent2">Into black perdition.</div>
    <div class="verse indent0">Cut the Calculus, and stop</div>
    <div class="verse indent2">Paths that lead to error;</div>
    <div class="verse indent0">Think—below the Junior Op.,<a id="FNanchor_275" href="#Footnote_275" class="fnanchor">[275]</a></div>
    <div class="verse indent2">Gapes the Gulph’s grim terror.<span class="pagenum" id="Page_621">[Pg 621]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then your Mathematic wings,</div>
    <div class="verse indent2">Plucked from off your shoulder,</div>
    <div class="verse indent0">Will express what Horace sings</div>
    <div class="verse indent2">Of that rash youth, bolder</div>
    <div class="verse indent0">Than his waxen wings allowed,</div>
    <div class="verse indent2">Or his cautious father.</div>
    <div class="verse indent0">Fall not <i>thou</i> from out thy cloud</div>
    <div class="verse indent2">Algebraic, rather</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Try the Poll, for none but fools,—</div>
    <div class="verse indent0">Fools, I mean, at College,</div>
    <div class="verse indent0">Reach the earth between two stools,</div>
    <div class="verse indent0">Triposes of Knowledge.</div>
    <div class="verse indent0">Better in poetic rage</div>
    <div class="verse indent0">Sing, through heaven soaring,</div>
    <div class="verse indent0">Than disfigure Goodwin’s page</div>
    <div class="verse indent0">By incessant poring.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Reply to the above, by F. W. F.</span></p>


<p class="nindc">“<i>Te quoque vatem dicunt pastores.</i>”—Virgil.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">O MAXWELL, if by reason’s strength</div>
    <div class="verse indent2">And studying of Babbage,</div>
    <div class="verse indent0">You have transformed yourself at length</div>
    <div class="verse indent2">Into a mental cabbage;</div>
    <div class="verse indent0">And if I’ve proved myself a lark</div>
    <div class="verse indent2">At morn and blushing even,</div>
    <div class="verse indent0">By soaring like a music-spark</div>
    <div class="verse indent2">Thro’ sapphire fields of Heaven,</div><span class="pagenum" id="Page_622">[Pg 622]</span>
    <div class="verse indent0">Our diverse fates are now reversed</div>
    <div class="verse indent2">By strange metempsychosis,</div>
    <div class="verse indent0">Into a cabbage I have burst</div>
    <div class="verse indent2">And scorn poetic posies;</div>
    <div class="verse indent0">But you a lark with twinkling wings</div>
    <div class="verse indent2">O’er violet-banks are soaring;</div>
    <div class="verse indent0"><i>Your</i> voice the dewy rose-cloud rings</div>
    <div class="verse indent2">While Statics me are boring.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Yet <i>cabbage</i> as I will—on earth</div>
    <div class="verse indent2">My roots I cannot anchor,</div>
    <div class="verse indent0">For at my mathematic birth</div>
    <div class="verse indent2">Was also born a canker!</div>
    <div class="verse indent0">It soon will gnaw my roots away—</div>
    <div class="verse indent2">But when I weigh a choenix</div>
    <div class="verse indent0">I’ll freely soar to realms of day</div>
    <div class="verse indent2">An emerald cabbage-Phœnix.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then talk not of the Poll to me,</div>
    <div class="verse indent2">I hate, detest, and scorn it;</div>
    <div class="verse indent0">I am as earnest as a bee,</div>
    <div class="verse indent2">But savage as a hornet.</div>
    <div class="verse indent0">And if they pluck me I will drown</div>
    <div class="verse indent2">Each pedant in a sonnet,</div>
    <div class="verse indent0">And of their pluckings make a crown</div>
    <div class="verse indent2">With golden plumes upon it.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">So if my cabbage growth be slow</div>
    <div class="verse indent2">I’ll try to be a carrot,</div>
    <div class="verse indent0">Or still remain a lark—but know</div>
    <div class="verse indent2">I’ll not be Poll, or Parrot.</div>
    <div class="verse indent0">Then if I fall beneath the mark,</div>
    <div class="verse indent2">I’ll shout with accent savage,</div>
    <div class="verse indent0">“It is a lark to be a lark,</div>
    <div class="verse indent2">’Tis green to be a cabbage.”</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Lines</span> <i>written under the conviction that it is not wise to
read Mathematics in November after one’s fire is out.</i></p>

<p class="right"><i>10th Nov. 1853.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0"><span class="allsmcap">In</span> the sad November time,</div>
    <div class="verse indent0">When the leaf has left the lime,</div>
    <div class="verse indent0">And the Cam, with sludge and slime,</div>
    <div class="verse indent7">Plasters his ugly channel,</div><span class="pagenum" id="Page_623">[Pg 623]</span>
    <div class="verse indent0">While, with sober step and slow,</div>
    <div class="verse indent0">Round about the marshes low,</div>
    <div class="verse indent0">Stiffening students stumping go</div>
    <div class="verse indent7">Shivering through their flannel.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then to me in doleful mood</div>
    <div class="verse indent0">Rises up a question rude,</div>
    <div class="verse indent0">Asking what sufficient good</div>
    <div class="verse indent7">Comes of this mode of living?</div>
    <div class="verse indent0">Moping on from day to day,</div>
    <div class="verse indent0">Grinding up what will not “pay,”</div>
    <div class="verse indent0">Till the jaded brain gives way</div>
    <div class="verse indent7">Under its own misgiving.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Why should wretched Man employ</div>
    <div class="verse indent0">Years which Nature meant for joy,</div>
    <div class="verse indent0">Striving vainly to destroy</div>
    <div class="verse indent7">Freedom of thought and feeling?</div>
    <div class="verse indent0">Still the injured powers remain</div>
    <div class="verse indent0">Endless stores of hopeless pain,</div>
    <div class="verse indent0">When at last the vanquished brain</div>
    <div class="verse indent7">Languishes past all healing.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Where is then his wealth of mind—</div>
    <div class="verse indent0">All the schemes that Hope designed?</div>
    <div class="verse indent0">Gone, like spring, to leave behind</div>
    <div class="verse indent7">Indolent melancholy.</div>
    <div class="verse indent0">Thus he ends his helpless days,</div>
    <div class="verse indent0">Vex’t with thoughts of former praise—</div>
    <div class="verse indent0">Tell me, how are Wisdom’s ways</div>
    <div class="verse indent7">Better than senseless Folly?</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Happier those whom trifles please,</div>
    <div class="verse indent0">Dreaming out a life of ease,</div>
    <div class="verse indent0">Sinking by unfelt degrees</div>
    <div class="verse indent7">Into annihilation.</div>
    <div class="verse indent0">Or the slave, to labour born,</div>
    <div class="verse indent0">Heedless of the freeman’s scorn,</div>
    <div class="verse indent0">Destined to be slowly worn</div>
    <div class="verse indent7">Down to the brute creation.<span class="pagenum" id="Page_624">[Pg 624]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus a tempting spirit spoke,</div>
    <div class="verse indent0">As from troubled sleep I woke</div>
    <div class="verse indent0">To a morning thick with smoke.</div>
    <div class="verse indent7">Sunless and damp and chilly.</div>
    <div class="verse indent0">Then to sleep I turned once more,</div>
    <div class="verse indent0">Eyes inflamed and windpipe sore,</div>
    <div class="verse indent0">Dreaming dreams I dreamt before,</div>
    <div class="verse indent7">Only not quite so silly.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">In my dream methought I strayed</div>
    <div class="verse indent0">Where a learned-looking maid</div>
    <div class="verse indent0">Stores of flimsy goods displayed,</div>
    <div class="verse indent7">Articles not worth wearing.</div>
    <div class="verse indent0">“These,” she said, with solemn air,</div>
    <div class="verse indent0">“Are the robes that sages wear,</div>
    <div class="verse indent0">Warranted, when kept with care,</div>
    <div class="verse indent7">Never to need repairing.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then unnumbered witlings, caught</div>
    <div class="verse indent0">By her wiles, the trappings bought,</div>
    <div class="verse indent0">And by labour, not by thought,</div>
    <div class="verse indent7">Honour and fame were earning.</div>
    <div class="verse indent0">While the men of wiser mind</div>
    <div class="verse indent0">Passed for blind among the blind;</div>
    <div class="verse indent0">Pedants left them far behind</div>
    <div class="verse indent7">In the career of learning.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Those that fix their eager eyes</div>
    <div class="verse indent0">Ever on the nearest prize</div>
    <div class="verse indent0">Well may venture to despise</div>
    <div class="verse indent7">Loftier aspirations.</div>
    <div class="verse indent0">Pedantry is in demand!</div>
    <div class="verse indent0">Buy it up at second-hand,</div>
    <div class="verse indent0">Seek no more to understand</div>
    <div class="verse indent7">Profitless speculations.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Thus the gaudy gowns were sold,</div>
    <div class="verse indent0">Cast off sloughs of pedants old;</div>
    <div class="verse indent0">Proudly marched the students bold</div>
    <div class="verse indent7">Through the domain of error,</div><span class="pagenum" id="Page_625">[Pg 625]</span>
    <div class="verse indent0">Till their trappings, false though fair,</div>
    <div class="verse indent0">Mouldered off and left them bare,</div>
    <div class="verse indent0">Clustering close in blank despair,</div>
    <div class="verse indent7">Nakedness, cold, and terror.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then, I said, “These haughty Schools</div>
    <div class="verse indent0">Boast that by their formal rules</div>
    <div class="verse indent0">They produce more learned fools</div>
    <div class="verse indent7">Than could be well expected.</div>
    <div class="verse indent0">Learned fools they are indeed,</div>
    <div class="verse indent0">Learned in the books they read;</div>
    <div class="verse indent0">Fools whene’er they come to need</div>
    <div class="verse indent7">Wisdom, too long neglected.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Oh! that men indeed were wise,</div>
    <div class="verse indent0">And would raise their purblind eyes</div>
    <div class="verse indent0">To the opening mysteries</div>
    <div class="verse indent7">Scattered around them ever.</div>
    <div class="verse indent0">Truth should spring from sterile ground,</div>
    <div class="verse indent0">Beauty beam from all around,</div>
    <div class="verse indent0">Right should then at last be found</div>
    <div class="verse indent7">Joining what none may sever.”</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">A Problem in Dynamics.</span></p>

<p class="right"><i>19th Feb. 1854.</i></p>

<figure class="figcenter width500" id="i_671" style="width: 300px;">
<img src="images/i_671.jpg" width="300" height="208" alt="A geometric
diagram showing a curve rising from point A to point B along axes
labeled Y and X, with tangent lines marked T and T + dT at points along
the curve, and labeled points M, K, and O at the origin and base.">
</figure>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent4">AN inextensible heavy chain</div>
    <div class="verse indent4">Lies on a smooth horizontal plane,</div>
    <div class="verse indent4">An impulsive force is applied at \(\mathrm{A}\),</div>
    <div class="verse indent4">Required the initial motion of \(\mathrm{K}\).</div>
    <div class="verse indent0">Let \(ds\) be the <i>infinitesimal</i> link,</div>
    <div class="verse indent0">Of which for the present we’ve only to think;</div><span class="pagenum" id="Page_626">[Pg 626]</span>
    <div class="verse indent4">Let \(\mathrm{T}\) be the tension, and \(\mathrm{T}+d \mathrm{T}\)</div>
    <div class="verse indent4">Let \(\alpha\) be put, by a common convention,</div>
    <div class="verse indent4">For the angle at \(\mathrm{M}\) ’twixt \(\mathrm{OX}\) and the tension;</div>
    <div class="verse indent4">Let \(\mathrm{V}_{t}\) and \(\mathrm{V}_{n}\) be \(ds\)’s velocities,</div>
    <div class="verse indent4">Of which \(\mathrm{V}_{t}\) along and \(\mathrm{V}_{n}\) across it is;</div>
    <div class="verse indent4">Then \(\dfrac{\mathrm{V}_{n}}{\mathrm{V}_{t}}\) the tangent will equal,</div>
    <div class="verse indent4">Of the angle of starting worked out in the sequel.</div>
  </div>
  <div class="stanza">
    <div class="verse indent4">In working the problem the first thing of course is</div>
    <div class="verse indent4">To equate the impressed and effectual forces.</div>
    <div class="verse indent4">\(\mathrm{K}\) is tugged by two tensions, whose difference \(d \mathrm{T}\)</div>
    <div class="verse indent0">(1) Must equal the element’s mass into \(\mathrm{V}_{t}\).</div>
    <div class="verse indent4">\(\mathrm{V}_{n}\) must be due to the force perpendicular</div>
    <div class="verse indent4">To \(ds\)’s direction, which shows the particular</div>
    <div class="verse indent4">Advantage of using \(da\) to serve at your</div>
    <div class="verse indent4">Pleasure to estimate \(ds\)’s curvature.</div>
    <div class="verse indent4">For \(\mathrm{V}_{n}\) into mass of a unit of chain</div>
    <div class="verse indent0">(2) Must equal the curvature into the strain.</div>
  </div>
  <div class="stanza">
    <div class="verse indent4">Thus managing cause and effect to discriminate,</div>
    <div class="verse indent4">The student must fruitlessly try to eliminate,</div>
    <div class="verse indent4">And painfully learn, that in order to do it, he</div>
    <div class="verse indent4">Must find the Equation of Continuity.</div>
    <div class="verse indent4">The reason is this, that the tough little element,</div>
    <div class="verse indent4">Which the force of impulsion to beat to a jelly meant,</div>
    <div class="verse indent4">Was endowed with a property incomprehensible,</div>
    <div class="verse indent4">And was “given,” in the language of Shop, “inextensible.”</div>
    <div class="verse indent4">It therefore with such pertinacity odd defied</div>
    <div class="verse indent4">The force which the length of the chain would have</div>
    <div class="verse indent8">modified,</div>
    <div class="verse indent4">That its stubborn example may possibly yet recall</div>
    <div class="verse indent4">These overgrown rhymes to their prosody metrical.</div>
    <div class="verse indent4">The condition is got by resolving again,</div>
    <div class="verse indent4">According to axes assumed in the plane.</div>
    <div class="verse indent4">If then you reduce to the tangent and normal,</div>
    <div class="verse indent0">(3) You will find the equation more neat tho’ less formal.</div><span class="pagenum" id="Page_627">[Pg 627]</span>
    <div class="verse indent0">(4) The condition thus found after these preparations,</div>
    <div class="verse indent4">When duly combined with the former equations,</div>
    <div class="verse indent4">Will give you another, in which differentials</div>
    <div class="verse indent0">(5) (When the chain forms a circle), become in essentials</div>
    <div class="verse indent4">No harder than those that we easily solve</div>
    <div class="verse indent0">(6) In the time a \(\mathrm{T}\) to turn would take to revolve.</div>
  </div>
  <div class="stanza">
    <div class="verse indent4">Now joyfully leaving \(ds\) to itself, a-</div>
    <div class="verse indent4">Tend to the values of \(\mathrm{T}\) and of \(a\).</div>
    <div class="verse indent4">The chain undergoes a distorting convulsion,</div>
    <div class="verse indent4">Produced first at \(\mathrm{A}\) by the force of impulsion.</div>
    <div class="verse indent4">n magnitude \(\mathrm{R}\), in direction tangential,</div>
    <div class="verse indent0">(7) Equating this \(\mathrm{R}\) to the form exponential,</div>
    <div class="verse indent4">Obtained for the tension when a is zero,</div>
    <div class="verse indent4">It will measure the tug, such a tug as the “hero</div>
    <div class="verse indent4">Plume-waving” experienced, tied to the chariot.</div>
    <div class="verse indent4">But when dragged by the heels his grim head could not</div>
    <div class="verse indent8">carry aught,</div>
    <div class="verse indent0">(8) So give \(a\) its due at the end of the chain,</div>
    <div class="verse indent4">And the tension ought there to be zero again.</div>
    <div class="verse indent4">From these two conditions we get three equations,</div>
    <div class="verse indent4">Which serve to determine the proper relations</div>
    <div class="verse indent4">Between the first impulse and each coefficient</div>
    <div class="verse indent4">In the form for the tension, and this is sufficient</div>
    <div class="verse indent4">To work out the problem, and then, if you choose,</div>
    <div class="verse indent4">You may turn it and twist it the Dons to amuse.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<i>Equations referred to.</i></p>
<p><span class="pagenum" id="Page_628">[Pg 628]</span></p>

\[
\begin{aligned}
&(1)\,\, d \mathrm{T}=m \mathrm{V}_{t} ds\\
&(2)\,\, m \mathrm{V}_{n}=\mathrm{T} \dfrac{da}{ds}\\
&(3)\,\, \frac{d \mathrm{V}_{t}}{ds}=\mathrm{V}_{n} \dfrac{da}{ds}\\
&(4)\,\, \dfrac{d^{2} \mathrm{T}}{ds^{2}}-\mathrm{T}\left(\dfrac{da}{ds}\right)^{2}=0\\
&(5)\,\, \dfrac{d^{2} \mathrm{T}}{da^{2}}-\mathrm{T}=0\\
&(6)\,\, \mathrm{T}=\mathrm{C}_{1} e^{\alpha}+\mathrm{C}_{2} e^{-\alpha}\\
&(7)\,\, \mathrm{R}=\mathrm{C}_{1}+\mathrm{C}_{2}\\
&(8)\,\, \mathrm{O}=\mathrm{C}_{1} e^{\alpha_{1}}+\mathrm{C}_{2} e^{-\alpha_{1}}\\
&\dfrac{\mathrm{V}_{n}}{\mathrm{V}_{t}}=\tan \beta
=-\dfrac{e^{\left(\alpha_{1}-\alpha\right)}-e^{-\left(\alpha_{1}-\alpha\right)}}{e^{\left(\alpha_{1}-\alpha\right)}+e^{-\left(\alpha_{1}-\alpha\right)}}
\end{aligned}
\]

<p class="nindc space-above2">
<span class="allsmcap">Valedictory Address to the D——n</span>.</p>

<p class="right"><i>May 1854.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">JOHN Alexander Frere, John,</div>
    <div class="verse indent2">When we were first acquent,</div>
    <div class="verse indent0">You lectured us as Freshmen</div>
    <div class="verse indent2">In the holy term of Lent;</div>
    <div class="verse indent0">But now you’re gettin’ bald, John,</div>
    <div class="verse indent2">Your end is drawing near,</div>
    <div class="verse indent0">And I think we’d better say “Goodbye,</div>
    <div class="verse indent2">John Alexander Frere.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">John Alexander Frere, John,</div>
    <div class="verse indent2">How swiftly Time has flown!</div>
    <div class="verse indent0">The weeks that you refused us</div>
    <div class="verse indent2">Are now no more your own;</div>
    <div class="verse indent0">Tho’ Time was in your hand, John,</div>
    <div class="verse indent2">You lingered out the year,</div>
    <div class="verse indent0">That Grace might more abound unto</div>
    <div class="verse indent2">John Alexander Frere.<a id="FNanchor_276" href="#Footnote_276" class="fnanchor">[276]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">There’s young Monro of Trinity,</div>
    <div class="verse indent2">And Hunter bold of Queen’s,</div>
    <div class="verse indent0">Who spurn the chapel system,</div>
    <div class="verse indent2">And “vex the souls of Deans.”</div>
    <div class="verse indent0">But all their petty squabbles</div>
    <div class="verse indent2">More ludicrous appear,</div>
    <div class="verse indent0">When we muse on thy departed form,</div>
    <div class="verse indent2">John Alexander Frere.<span class="pagenum" id="Page_629">[Pg 629]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">There’s many a better man, John,</div>
    <div class="verse indent2">That scorns the scoffing crew,</div>
    <div class="verse indent0">But keeps with fond affection</div>
    <div class="verse indent2">The notes he got from yo—</div>
    <div class="verse indent0">“Why he was out of College,</div>
    <div class="verse indent2">Till two o’clock or near,</div>
    <div class="verse indent0">The Senior Dean requests to know,</div>
    <div class="verse indent2">Yours truly, J. A. Frere.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">John Alexander Frere, John,</div>
    <div class="verse indent2">I wonder what you mean</div>
    <div class="verse indent0">By mixing up your name so</div>
    <div class="verse indent2">With me, and with “The Dean.”</div>
    <div class="verse indent0">Another Don may dean us,</div>
    <div class="verse indent2">But ne’er again, we fear,</div>
    <div class="verse indent0">Shall we receive such notes as yours,</div>
    <div class="verse indent2">John Alexander Frere.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">The Lecture Room no more, John,</div>
    <div class="verse indent2">Shall hear thy drowsy tone,</div>
    <div class="verse indent0">No more shall men in Chapel</div>
    <div class="verse indent2">Bow down before thy throne.</div>
    <div class="verse indent0">But Shillington with meekness,</div>
    <div class="verse indent2">The oracle shall hear,</div>
    <div class="verse indent0">That set St. Mary’s all to sleep—</div>
    <div class="verse indent2">John Alexander Frere.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Then once before we part, John,</div>
    <div class="verse indent2">Let all be clean forgot,</div>
    <div class="verse indent0">Our scandalous inventions,</div>
    <div class="verse indent2">[Thy note-lets, prized or not].</div>
    <div class="verse indent0">For under all conventions,</div>
    <div class="verse indent2">The small man lived sincere,</div>
    <div class="verse indent0">The kernel of the Senior Dean,</div>
    <div class="verse indent2">John Alexander Frere.<a id="FNanchor_277" href="#Footnote_277" class="fnanchor">[277]</a></div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_630">[Pg 630]</span></p>

<p class="nindc space-above2">
<span class="allsmcap">In Memory of Edward Wilson,</span></p>

<p class="nindc">
<i>Who repented of what was in his mind to write after section.</i></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container"><i>Rigid Body</i> (<i>sings</i>).</div>
  <div class="stanza">
    <div class="verse indent0">GIN a body meet a body</div>
    <div class="verse indent2">Flyin’ through the air,</div>
    <div class="verse indent0">Gin a body hit a body,</div>
    <div class="verse indent2">Will it fly? and where?</div>
    <div class="verse indent0">Ilka impact has its measure,</div>
    <div class="verse indent2">Ne’er a ane hae I,</div>
    <div class="verse indent0">Yet a’ the lads they measure me,</div>
    <div class="verse indent2">Or, at least, they try.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Gin a body meet a body</div>
    <div class="verse indent2">Altogether free,</div>
    <div class="verse indent0">How they travel afterwards</div>
    <div class="verse indent2">We do not always see.</div>
    <div class="verse indent0">Ilka problem has its method</div>
    <div class="verse indent2">By analytics high;</div>
    <div class="verse indent0">For me, I ken na ane o’ them,</div>
    <div class="verse indent2">But what the waur am I?</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Valentine by a Telegraph Clerk \(\unicode{x2642}\) to a Telegraph
Clerk \(\unicode{x2641}\).</span></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">“THE tendrils of my soul are twined</div>
    <div class="verse indent2">With thine, though many a mile apart,</div>
    <div class="verse indent0">And thine in close-coiled circuits wind</div>
    <div class="verse indent2">Around the needle of my heart.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“Constant as Daniell, strong as Grove,</div>
    <div class="verse indent2">Ebullient through its depths like Smee,</div>
    <div class="verse indent0">My heart pours forth its tide of love,</div>
    <div class="verse indent2">And all its circuits close in thee.<span class="pagenum" id="Page_631">[Pg 631]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“O tell me, when along the line</div>
    <div class="verse indent2">From my full heart the message flows,</div>
    <div class="verse indent0">What currents are induced in thine?</div>
    <div class="verse indent2">One click from thee will end my woes.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Through many an Ohm the Weber flew,</div>
    <div class="verse indent2">And clicked this answer back to me,—</div>
    <div class="verse indent0">“I am thy Farad, staunch<a id="FNanchor_278" href="#Footnote_278" class="fnanchor">[278]</a> and true,</div>
    <div class="verse indent2">Charged to a Volt with love for thee.”</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<span class="allsmcap">Lectures to Women on Physical Science.</span></p>

<div class="poetry-container">
<div class="poetry">
    <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent8">PLACE.—<i>A small alcove with dark curtains.</i></div>
    <div class="verse indent14"><i>The Class consists of one member.</i></div>
    <div class="verse indent8">SUBJECT.—<i>Thomson's Mirror Galvanometer.</i></div>
  </div>
  <div class="stanza">
    <div class="verse indent8">THE lamp-light falls on blackened walls,</div>
    <div class="verse indent10">And streams through narrow perforations,</div>
    <div class="verse indent8">The long beam trails o’er pasteboard scales,</div>
    <div class="verse indent10">With slow-decaying oscillations.</div>
    <div class="verse indent0">Flow, current, flow, set the quick light-spot flying,</div>
    <div class="verse indent0">Flow current, answer light-spot, flashing, quivering, dying,</div>
  </div>
  <div class="stanza">
    <div class="verse indent8">O look! how queer! how thin and clear,</div>
    <div class="verse indent10">And thinner, clearer, sharper growing</div>
    <div class="verse indent8">The gliding fire! with central wire,</div>
    <div class="verse indent10">The fine degrees distinctly showing.</div>
    <div class="verse indent0">Swing, magnet, swing, advancing and receding,</div>
    <div class="verse indent0">Swing magnet! Answer dearest, What’s your final reading?</div>
  </div>
  <div class="stanza">
    <div class="verse indent8">O love! you fail to read the scale</div>
    <div class="verse indent10">Correct to tenths of a division.</div>
    <div class="verse indent8">To mirror heaven those eyes were given,</div>
    <div class="verse indent10">And not for methods of precision.</div>
    <div class="verse indent0">Break contact, break, set the free light-spot flying;</div>
    <div class="verse indent0">Break contact, rest thee, magnet, swinging, creeping, dying.</div>
  </div>
</div>
</div>
<p><span class="pagenum" id="Page_632">[Pg 632]</span></p>

<p class="nindc space-above2">
<span class="allsmcap">Lectures to Women on Physical Science.</span></p>

<p class="right"><i>July 1874.</i></p>

<p class="nindc">II.</p>

<p class="nindc">
<i>Professor Chrschtschonovitsch, Ph.D.</i>, “<i>On the G. G.
S.</i><a id="FNanchor_279" href="#Footnote_279" class="fnanchor">[279]</a> <i>system of Units.</i>”</p>

<p class="nindc">
<i>Remarks submitted to the Lecturer by a student.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">PRIM Doctor of Philosophy</div>
    <div class="verse indent2">From academic Heidelberg!</div>
    <div class="verse indent0">Your sum of vital energy</div>
    <div class="verse indent2">Is not the millionth of an erg.<a id="FNanchor_280" href="#Footnote_280" class="fnanchor">[280]</a></div>
    <div class="verse indent0">Your liveliest motion might be reckoned</div>
    <div class="verse indent0">At one-tenth metre<a id="FNanchor_281" href="#Footnote_281" class="fnanchor">[281]</a> in a second.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“The air,” you said, in language fine,</div>
    <div class="verse indent2">Which scientific thought expresses,</div>
    <div class="verse indent0">“The air—which with a megadyne,<a id="FNanchor_282" href="#Footnote_282" class="fnanchor">[282]</a></div>
    <div class="verse indent2">On each square centimetre presses—</div>
    <div class="verse indent0">The air, and I may add the ocean,</div>
    <div class="verse indent0">Are nought but molecules in motion.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Atoms, you told me, were discrete,</div>
    <div class="verse indent2">Than you they could not be discreter,</div>
    <div class="verse indent0">Who know how many Millions meet</div>
    <div class="verse indent2">Within a cubic millimetre.</div>
    <div class="verse indent0"><i>They</i> clash together as they fly,</div>
    <div class="verse indent0">But <i>you</i>!—you cannot tell me why.<span class="pagenum" id="Page_633">[Pg 633]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">And when in tuning my guitar</div>
    <div class="verse indent2">The interval would <i>not</i> come right,</div>
    <div class="verse indent0">“This string,” you said, “is strained too far,</div>
    <div class="verse indent2">’Tis forty dynes,<a id="FNanchor_283" href="#Footnote_283" class="fnanchor">[283]</a> at least too tight!”</div>
    <div class="verse indent0">And then you told me, as I sang,</div>
    <div class="verse indent0">What overtones were in my clang.<a id="FNanchor_284" href="#Footnote_284" class="fnanchor">[284]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">You gabbled on, but every phrase</div>
    <div class="verse indent2">Was stiff with scientific shoddy,</div>
    <div class="verse indent0">The only song you deigned to praise</div>
    <div class="verse indent2">Was “Gin a body meet a body,”</div>
    <div class="verse indent0">“And even there,” you said, “collision</div>
    <div class="verse indent0">Was not described with due precision.”</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">“In the invariable plane,”</div>
    <div class="verse indent2">You told me, “lay the impulsive couple.”<a id="FNanchor_285" href="#Footnote_285" class="fnanchor">[285]</a></div>
    <div class="verse indent0">You seized my hand—you gave me pain,</div>
    <div class="verse indent2">By torsion of a wrist so supple;</div>
    <div class="verse indent0">You told me what that wrench would do,—</div>
    <div class="verse indent0">“’Twould set me twisting round a screw.”<a id="FNanchor_286" href="#Footnote_286" class="fnanchor">[286]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Were every hair of every tress</div>
    <div class="verse indent2">(Which you, no doubt, imagine mine),</div>
    <div class="verse indent0">Drawn towards you with its breaking stress—</div>
    <div class="verse indent2">A stress, say, of a megadyne,</div>
    <div class="verse indent0">That tension I would sooner suffer</div>
    <div class="verse indent0">Than meet again with such a duffer!</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_634">[Pg 634]</span></p>

<p class="nindc space-above2">
<span class="allsmcap">To the Chief Musician upon Nabla.</span><a id="FNanchor_287" href="#Footnote_287" class="fnanchor">[287]</a></p>

<p class="nindc"><i>A Tyndallic Ode.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="poetry-container">I.</div>
  <div class="stanza">
    <div class="verse indent0">I COME from fields of fractured ice,</div>
    <div class="verse indent2">Whose wounds are cured by squeezing,</div>
    <div class="verse indent0">Melting<a id="FNanchor_288" href="#Footnote_288" class="fnanchor">[288]</a> they cool, but in a trice,</div>
    <div class="verse indent2">Get<a id="FNanchor_289" href="#Footnote_289" class="fnanchor">[289]</a> warm again by freezing.</div>
    <div class="verse indent0">Here, in the frosty air, the sprays</div>
    <div class="verse indent2">With fern-like hoar-frost bristle,</div>
    <div class="verse indent0">There, liquid stars their watery rays</div>
    <div class="verse indent2">Shoot through the solid crystal.</div>
  </div>
  <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent0">I come from empyrean fires—</div>
    <div class="verse indent2">From microscopic spaces,</div>
    <div class="verse indent0">Where molecules with fierce desires.</div>
    <div class="verse indent2">Shiver in hot embraces.</div>
    <div class="verse indent0">The atoms clash, the spectra flash,</div>
    <div class="verse indent2">Projected on the screen,</div>
    <div class="verse indent0">The double \(\mathrm{D}\), magnesian \(b\),</div>
    <div class="verse indent2">And Thallium’s living green.</div>
  </div>
  <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent0">We place our eye where these dark rays</div>
    <div class="verse indent2">Unite in this dark focus,</div>
    <div class="verse indent0">Right on the source of power we gaze,</div>
    <div class="verse indent2">Without a screen to cloak us.</div>
    <div class="verse indent0">Then where the eye was placed at first,</div>
    <div class="verse indent2">We place a disc<a id="FNanchor_290" href="#Footnote_290" class="fnanchor">[290]</a> of platinum,</div>
    <div class="verse indent0">It glows, it puckers! will it<a id="FNanchor_291" href="#Footnote_291" class="fnanchor">[291]</a> burst?</div>
    <div class="verse indent2">How ever shall we<a id="FNanchor_292" href="#Footnote_292" class="fnanchor">[292]</a> flatten him!</div><span class="pagenum" id="Page_635">[Pg 635]</span>
  </div>
  <div class="poetry-container">IV.</div>
  <div class="stanza">
    <div class="verse indent0">This crystal tube the electric ray</div>
    <div class="verse indent2">Shows optically clean,</div>
    <div class="verse indent0">No dust or haze within, but stay!</div>
    <div class="verse indent2">All has not yet been seen.</div>
    <div class="verse indent0">What gleams are these of heavenly blue?</div>
    <div class="verse indent2">What air-drawn form appearing,</div>
    <div class="verse indent0">What mystic fish, that, ghostlike, through<a id="FNanchor_293" href="#Footnote_293" class="fnanchor">[293]</a></div>
    <div class="verse indent2">The empty<a id="FNanchor_294" href="#Footnote_294" class="fnanchor">[294]</a> space is steering?</div>
  </div>
  <div class="poetry-container">V.</div>
  <div class="stanza">
    <div class="verse indent0">I light this sympathetic flame,</div>
    <div class="verse indent2">My faintest wish that answers,</div>
    <div class="verse indent0">I sing, it sweetly sings the same,</div>
    <div class="verse indent2">It dances with the dancers.</div>
    <div class="verse indent0">I shout, I whistle, clap my hands,</div>
    <div class="verse indent2">And<a id="FNanchor_295" href="#Footnote_295" class="fnanchor">[295]</a> stamp upon<a id="FNanchor_296" href="#Footnote_296" class="fnanchor">[296]</a>
    the platform,</div>
    <div class="verse indent0">The flame responds<a id="FNanchor_297" href="#Footnote_297" class="fnanchor">[297]</a> to my commands,</div>
    <div class="verse indent2">In this form and in that form.</div>
  </div>
  <div class="poetry-container">VI.</div>
  <div class="stanza">
    <div class="verse indent0">What means that thrilling, drilling scream,</div>
    <div class="verse indent2">Protect me! ’tis the siren:</div>
    <div class="verse indent0">Her heart is fire, her breath is steam,</div>
    <div class="verse indent2">Her larynx is of iron.</div>
    <div class="verse indent0">Sun! dart thy beams! in tepid streams,</div>
    <div class="verse indent2">Rise, viewless exhalations!</div>
    <div class="verse indent0">And lap me round, that no rude sound</div>
    <div class="verse indent2">May mar my meditations.</div>
  </div>
  <div class="poetry-container">VII.</div>
  <div class="stanza">
    <div class="verse indent0">Here let me pause.—These transient facts,</div>
    <div class="verse indent2">These fugitive impressions,</div>
    <div class="verse indent0">Must be transformed by mental acts,</div>
    <div class="verse indent2">To permanent possessions.</div><span class="pagenum" id="Page_636">[Pg 636]</span>
    <div class="verse indent0">Then summon up your grasp of mind,</div>
    <div class="verse indent2">Your fancy scientific,</div>
    <div class="verse indent0">Till<a id="FNanchor_298" href="#Footnote_298" class="fnanchor">[298]</a> sights and sounds with thought combined,</div>
    <div class="verse indent2">Become<a id="FNanchor_299" href="#Footnote_299" class="fnanchor">[299]</a> of truth prolific.</div>
  </div>
  <div class="poetry-container">VIII.</div>
  <div class="stanza">
    <div class="verse indent0">Go to! prepare your mental bricks,</div>
    <div class="verse indent2">Fetch them from every quarter,</div>
    <div class="verse indent0">Firm on the sand your basement fix</div>
    <div class="verse indent2">With best sensation mortar.</div>
    <div class="verse indent0">The top<a id="FNanchor_300" href="#Footnote_300" class="fnanchor">[300]</a> shall rise to heaven on high—</div>
    <div class="verse indent2">Or such an elevation,</div>
    <div class="verse indent0">That the swift whirl with which we fly</div>
    <div class="verse indent2">Shall conquer gravitation.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">To the Committee of the Cayley Portrait Fund.</span></p>

<p class="right"><i>1874.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">O WRETCHED race of men, to space confined!</div>
    <div class="verse indent0">What honour can ye pay to him, whose mind</div>
    <div class="verse indent0">To that which lies beyond hath penetrated?</div>
    <div class="verse indent0">The symbols he hath formed shall sound his praise,</div>
    <div class="verse indent0">And lead him on through unimagined ways</div>
    <div class="verse indent0">To conquests new, in worlds not yet created.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">First, ye Determinants! in ordered row</div>
    <div class="verse indent0">And massive column ranged, before him go,</div>
    <div class="verse indent0">To form a phalanx for his safe protection.</div>
    <div class="verse indent0">Ye powers of the \(n\)th roots of—1!</div>
    <div class="verse indent0">Around his head in ceaseless<a id="FNanchor_301" href="#Footnote_301" class="fnanchor">[301]</a> cycles run,</div>
    <div class="verse indent0">As unembodied spirits of direction.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">And you, ye undevelopable scrolls!</div>
    <div class="verse indent0">Above the host wave your emblazoned rolls,</div>
    <div class="verse indent0">Ruled for the record of his bright inventions.</div>
    <div class="verse indent0">Ye Cubic surfaces! by threes and nines</div>
    <div class="verse indent0">Draw round his camp your seven-and-twenty lines—</div>
    <div class="verse indent0">The seal of Solomon in three dimensions.<span class="pagenum" id="Page_637">[Pg 637]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">March on, symbolic host! with step sublime,</div>
    <div class="verse indent0">Up to the flaming hounds of Space and Time!</div>
    <div class="verse indent0">There pause, until by Dickenson depicted,</div>
    <div class="verse indent0">In two dimensions, we the form may trace</div>
    <div class="verse indent0">Of him whose soul, too large for vulgar space,</div>
    <div class="verse indent0">In \(n\) dimensions flourished unrestricted.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Molecular Evolution.</span></p>

<p class="right"><i>Belfast, 1874.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">AT quite uncertain times and places,</div>
    <div class="verse indent2">The atoms left their heavenly path,</div>
    <div class="verse indent0">And by fortuitous embraces,</div>
    <div class="verse indent2">Engendered all that being hath.</div>
    <div class="verse indent0">And though they seem to cling together,</div>
    <div class="verse indent2">And form “associations” here,</div>
    <div class="verse indent0">Yet, soon or late, they hurst their tether,</div>
    <div class="verse indent2">And through the depths of space career.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">So we who sat, oppressed with science,</div>
    <div class="verse indent2">As British asses, wise and grave,</div>
    <div class="verse indent0">Are now transformed to wild Red Lions,<a id="FNanchor_302" href="#Footnote_302" class="fnanchor">[302]</a></div>
    <div class="verse indent2">As round our prey we ramp and rave.</div>
    <div class="verse indent0">Thus, by a swift metamorphosis,</div>
    <div class="verse indent2">Wisdom turns wit, and science joke,</div>
    <div class="verse indent0">Nonsense is incense to our noses,</div>
    <div class="verse indent2">For when Red Lions speak, they smoke.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Hail, Nonsense! dry nurse of Red Lions,<a id="FNanchor_303" href="#Footnote_303" class="fnanchor">[303]</a></div>
    <div class="verse indent2">From thee the wise their wisdom learn,</div>
    <div class="verse indent0">From thee they cull those truths of science,</div>
    <div class="verse indent2">Which into thee again they turn.</div>
    <div class="verse indent0">What combinations of ideas,</div>
    <div class="verse indent2">Nonsense alone can wisely form!</div>
    <div class="verse indent0">What sage has half the power that she has,</div>
    <div class="verse indent2">To take the towers of Truth by storm?<span class="pagenum" id="Page_638">[Pg 638]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Yield, then, ye rules of rigid reason!</div>
    <div class="verse indent2">Dissolve, thou too, too solid sense!</div>
    <div class="verse indent0">Melt into nonsense for a season,</div>
    <div class="verse indent2">Then in some nobler form condense.</div>
    <div class="verse indent0">Soon, all too soon, the chilly morning,</div>
    <div class="verse indent2">This flow of soul will crystallize,</div>
    <div class="verse indent0">Then those who Nonsense now are scorning,</div>
    <div class="verse indent2">May learn, too late, where wisdom lies.</div>
  </div>
</div>
</div>

<p class="right space-above2">
<i>Molecular Evolution.</i></p>

<p class="nindc"><span class="allsmcap">Song of the Cub.</span></p>

<p class="right"><i>Belfast, 1874.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">I KNOW not what this may betoken,</div>
    <div class="verse indent2">That I feel so wondrous wise;</div>
    <div class="verse indent0">My dream of existence is broken</div>
    <div class="verse indent2">Since science has opened my eyes.</div>
    <div class="verse indent0">At the British Association</div>
    <div class="verse indent2">I heard the President’s speech,</div>
    <div class="verse indent0">And the methods and facts of creation</div>
    <div class="verse indent2">Seemed suddenly placed in my reach.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">My life’s undivided devotion</div>
    <div class="verse indent2">To Science I solemnly vowed,</div>
    <div class="verse indent0">I’d dredge up the bed of the ocean,</div>
    <div class="verse indent2">I’d draw down the spark from the cloud.</div>
    <div class="verse indent0">To follow my thoughts as they go on,</div>
    <div class="verse indent2">Electrodes I’d place in my brain;</div>
    <div class="verse indent0">Nay, I’d swallow a live entozöon.</div>
    <div class="verse indent2">New feelings of life to obtain.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">O where are those high feasts of Science?</div>
    <div class="verse indent2">O where are those words of the wise?</div>
    <div class="verse indent0">I hear but the roar of Red Lions,</div>
    <div class="verse indent2">I eat what their Jackal supplies.</div>
    <div class="verse indent0">I meant to be so scientific,</div>
    <div class="verse indent2">But science seems turned into fun;</div>
    <div class="verse indent0">And this, with his roaring terrific,</div>
    <div class="verse indent2">That old red lion hath done.</div>
  </div>
</div>
</div>

<p><span class="pagenum" id="Page_639">[Pg 639]</span></p>

<p class="right space-above2">
<span class="allsmcap">British Association, 1874.</span></p>

<p class="nindc"><i>Notes of the President's Address.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">IN the very beginnings of science, the parsons, who managed</div>
    <div class="verse indent4">things then,</div>
    <div class="verse indent0">Being handy with hammer and chisel, made gods in the</div>
    <div class="verse indent4">likeness of men;</div>
    <div class="verse indent0">Till Commerce arose, and at length some men of exceptional</div>
    <div class="verse indent4">power</div>
    <div class="verse indent0">Supplanted both demons and gods by the atoms, which last</div>
    <div class="verse indent4">to this hour.</div>
    <div class="verse indent0">Yet they did not abolish the gods, but they sent them well</div>
    <div class="verse indent4">out of the way,</div>
    <div class="verse indent0">With the rarest of nectar to drink, and blue fields of nothing</div>
    <div class="verse indent4">to sway.</div>
    <div class="verse indent0">From nothing comes nothing, they told us, nought happens</div>
    <div class="verse indent4">by chance, but by fate;</div>
    <div class="verse indent0">There is nothing but atoms, and void, all else is mere whims</div>
    <div class="verse indent4">out of date!</div>
    <div class="verse indent0">Then why should a man curry favour with beings who cannot</div>
    <div class="verse indent4">exist,</div>
    <div class="verse indent0">To compass some petty promotion in nebulous kingdoms of</div>
    <div class="verse indent4">mist?</div>
    <div class="verse indent0">But not by the rays of the sun, nor the glittering shafts of</div>
    <div class="verse indent4">the day,</div>
    <div class="verse indent0">Must the fear of the gods be dispelled, but by words, and</div>
    <div class="verse indent4">their wonderful play.</div>
    <div class="verse indent0">So treading a path all untrod, the poet-philosopher sings</div>
    <div class="verse indent0">Of the seeds of the mighty world—the first-beginnings of</div>
    <div class="verse indent4">things;</div>
    <div class="verse indent0">How freely he scatters his atoms before the beginning of</div>
    <div class="verse indent4">years;</div>
    <div class="verse indent0">How he clothes them with force as a garment, those small</div>
    <div class="verse indent4">incompressible spheres!</div>
    <div class="verse indent0">Nor yet does he leave them hard-hearted—he dowers them</div>
    <div class="verse indent4">with love and with hate,</div>
    <div class="verse indent0">Like spherical small British Asses in infinitesimal state;</div><span class="pagenum" id="Page_640">[Pg 640]</span>
    <div class="verse indent0">Till just as that living Plato, whom foreigners nickname</div>
    <div class="verse indent4">Plateau,<a id="FNanchor_304" href="#Footnote_304" class="fnanchor">[304]</a></div>
    <div class="verse indent0">Drops oil in his whisky-and-water (for foreigners sweeten</div>
    <div class="verse indent4">it so),</div>
    <div class="verse indent0">Each drop keeps apart from the other, enclosed in a flexible</div>
    <div class="verse indent4">skin,</div>
    <div class="verse indent0">Till touched by the gentle emotion evolved by the prick of</div>
    <div class="verse indent4">a pin:</div>
    <div class="verse indent0">Thus in atoms a simple collision excites a sensational thrill,</div>
    <div class="verse indent0">Evolved through all sorts of emotion, as sense, understanding,</div>
    <div class="verse indent4">and will;</div>
    <div class="verse indent0">(For by laying their heads all together, the atoms, as councillors</div>
    <div class="verse indent4">do,</div>
    <div class="verse indent0">May combine to express an opinion to every one of them</div>
    <div class="verse indent4">new).</div>
    <div class="verse indent0">There is nobody here, I should say, has felt true indignation</div>
    <div class="verse indent4">at all,</div>
    <div class="verse indent0">Till an indignation meeting is held in the Ulster Hall;</div>
    <div class="verse indent0">Then gathers the wave of emotion, then noble feelings arise,</div>
    <div class="verse indent0">Till you all pass a resolution which takes every man by</div>
    <div class="verse indent4">surprise.</div>
    <div class="verse indent0">Thus the pure elementary atom, the unit of mass and of</div>
    <div class="verse indent4">thought,</div>
    <div class="verse indent0">By force of mere juxtaposition to life and sensation is</div>
    <div class="verse indent4">brought;</div>
    <div class="verse indent0">So, down through untold generations, transmission of structureless</div>
    <div class="verse indent4">germs</div>
    <div class="verse indent0">Enables our race to inherit the thoughts of beasts, fishes,</div>
    <div class="verse indent4">and worms.</div>
    <div class="verse indent0">We honour our fathers and mothers, grandfathers and grand-mothers</div>
    <div class="verse indent4">too;</div>
    <div class="verse indent0">But how shall we honour the vista of ancestors now in our</div>
    <div class="verse indent4">view?</div>
    <div class="verse indent0">First, then, let us honour the atom, so lively, so wise, and</div>
    <div class="verse indent4">so small;</div>
    <div class="verse indent0">The atomists next let us praise, Epicurus, Lucretius, and all;</div><span class="pagenum" id="Page_641">[Pg 641]</span>
    <div class="verse indent0">Let us damn with faint praise Bishop Butler, in whom many</div>
    <div class="verse indent0">atoms combined</div>
    <div class="verse indent0">To form that remarkable structure, it pleased him to call—his</div>
    <div class="verse indent0">mind.</div>
    <div class="verse indent0">Last, praise we the noble body to which, for the time, we</div>
    <div class="verse indent0">belong,</div>
    <div class="verse indent0">Ere yet the swift whirl of the atoms has hurried us, ruthless,</div>
    <div class="verse indent0">along,</div>
    <div class="verse indent0">The British Association—like Leviathan worshipped by</div>
    <div class="verse indent0">Hobbes,</div>
    <div class="verse indent0">The incarnation of wisdom, built up of our witless nobs,</div>
    <div class="verse indent0">Which will carry on endless discussions, when I, and probably</div>
    <div class="verse indent0">you,</div>
    <div class="verse indent0">Have melted in infinite azure—in English, till all is blue.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<i>Translation of</i> “<i>Notes on the President's Address, British
Association</i>, 1874.” By B. Shilleto.</p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">πρώτ' άρχομένης σοφίας, ίερείς, οΐσπερ τότε πάντ' Έμεμήλει,</div>
    <div class="verse indent0">δαιδαλοκομψογλυφανορραισταί, θνητώ θεὸν είκότ' έτευξαν'</div>
    <div class="verse indent0">ές τ' έμπορία 'γένετ', είτα βροτὸς πλατύνωτος ύπεσκέλισέν τις</div>
    <div class="verse indent0">δαίμονα καὶ θεὸν, άντειληφὼς άτόμονς μέχρι δεύρο μενούσας.</div>
    <div class="verse indent0">ού μὴν πάντως γ' Έκτεινε θεούς, άλλ' Έκτοπίονς άπέπεμψεν</div>
    <div class="verse indent0">νέκταρ τε πιείν σπάνιον, γλανκοίς τ' έν άγροι̂s τοίς μηδὲν άνάσσειν.</div>
    <div class="verse indent0">Έξ ούδενὸς έστ' ούδέν, έφασκον συνέβη γὰρ άπαντα κατ' α ΐσαν.</div>
    <div class="verse indent0">πλὴν άτομοι καὶ χάος ούδὲν έφν κρονίων τάλλ' ού καλὸν όζει.</div>
    <div class="verse indent0">τί άν ούν τοι̂s μὴ δυνατοίς είναι μελετώης άνν χαρίσασθαι,</div>
    <div class="verse indent0">έμειρόμενος τινὸς άρχιδίον ν κορυφαΐς όμίχλης νεφοέσσης;</div>
    <div class="verse indent0">ού μὴν ούδ' άν σέλας ήελίον γ', ούδ' ήμέριον βέλος αύγης,</div>
    <div class="verse indent0">σκεδάσειε θεών δείμ', άλλα λόγοι, χώ περὶ τούτων στενολεσχών.</div>
    <div class="verse indent0">πρὸς ταύτα πατών στίβον άστειπτον, μεγάλον μετεωροποιητὴς</div>
    <div class="verse indent0">σπέρματα κόσμον πρωτάς<a id="FNanchor_305" href="#Footnote_305" class="fnanchor">[305]</a> τ' άρχὰς πάντων όπόσ' έστιν άείδει'</div>
    <div class="verse indent0">καταχεί τ' άτόμονς μάλ' Έλευθερίως πρὶν φύναι τοὺς Ένιαυτούς,</div>
    <div class="verse indent0">ώς ίματίω δυνάμει περιδὺς τὰ σφαιρίδι’ ούχὶ πιεστά,</div>
    <div class="verse indent0">φιλίαν μέντοι μίσός τ' Έπέδωκ, ού σκληρόφρονας καταλείπων,</div>
    <div class="verse indent0">ώς σμίκρ' όντα σφαιρίχ' όποστούν φιτύματ' όνεια Βρετάννων.</div>
    <div class="verse indent0">κάθ' οία Πλάτων ό ζών νννί, καλέονσι θεοὶ δὲ Πλαταιά,</div>
    <div class="verse indent0">γάνος οίναρίω ́μιξεν έλαίον (γλυκν̀ γὰρ ποιεί θεὸς οΰτω),</div>
    <div class="verse indent0">έτέρας έτέρα χωρὶς σταγόσιν δέρμ́ αϊόλον άμφιέσας τι,</div><span class="pagenum" id="Page_642">[Pg 642]</span>
    <div class="verse indent0">ὲς τ' ᾰν μαλακὴ κίνησις άφης πλησθή κέντροισιν όπητος</div>
    <div class="verse indent0">ούτως άτόμων σύγκρασις άπλη παρέχει τινὰ γάργαλον όξύν,</div>
    <div class="verse indent0">κατέδειξεν άπασ’ όν κίνησις, νούς οία φρόνησις όρεξις</div>
    <div class="verse indent0">οι’δ’ άν φαίην γνήσιον όργην των ένταυ̂θ' ούδέν’ έπα̂ραι</div>
    <div class="verse indent0">πρὶν έποιήθη σύλλογος όργης όδ́ Ιέρνης<a id="FNanchor_306" href="#Footnote_306" class="fnanchor">[306]</a> έν πρυτανείω</div>
    <div class="verse indent0">τότε κίνησις κύματ’ έγείρει, μεγάλη τότε γίγνεται όρμή,</div>
    <div class="verse indent0">θαύματί θ' ύμεὶς ψήφον θέμενοι καταπλήττετε πάντας άπαντες</div>
    <div class="verse indent0">άτομος διὰ ταύθ' ή πρώτη, νου πλήθους θ' ένὰς, αΐεν άκρατος</div>
    <div class="verse indent0">του̂ παρακείσθαι δυνάιεει βιοτὴν έλαβέν τ' αΐσθησιν έκάστη.</div>
    <div class="verse indent0">χοΰτω γενεών έξ άμετρήτων στοιχεία δεδέγμεθ' άμορφα,</div>
    <div class="verse indent0">θηρίον ίχθὺς αύτός θ' ό φθεὶρ ᾰ φρονούσιν κληρονομούντες.</div>
    <div class="verse indent0">πατέρας πάππους τιμώμεν άεὶ τηθαΐς καὶ μητράσιν αύται̂s.</div>
    <div class="verse indent0">πώς δ́ άν προγόνων τήνδε παρούσαν τιμήσειέν τις έποψιν;</div>
    <div class="verse indent0">άτόμω πρώτη κείσθω τιμή, διερα̂ μάλα σώφρονι λεπτή.</div>
    <div class="verse indent0">τοὺς άτομίξοντας ε´´πειτ' αίνω Λονκρήτιον ήδ́ ́Επίκουρον,</div>
    <div class="verse indent0">καταμεμφόμενος πόλλ' Οίνοχόον, κεί πολὺ πλήθος συνεπλέχθη</div>
    <div class="verse indent0">άτόμων μέγα θαυ̂μ' έργαξομένων ό καλείν οί έδοξε νόημα.</div>
    <div class="verse indent0">ΰστατα δ’ αίνα̂ χορὸν άθάνατον, ννν ήμετέρονς κορυφαίους, στρόβος οΰς άτόμων</div>
    <div class="verse indent0">οΰπω σοβαρὸς φρεσὶν είλκνσε τηλόσ́ άνοίκτοις, κνώδαλον οΐον του̂ ψυχολόγου,</div>
    <div class="verse indent0">φιτύματ' όνεια Βρετάννων, άσόφου κτισθέντας ύπ’ έγκεφάλον, σοφίας έμψυχον</div>
    <div class="verse indent0">άγαλμα, οΐπερ διατρίψονσιν άπαύστως, όπόταν τάχ' ίσως σύ τε κάγὼ κνανώ τε</div>
    <div class="verse indent0">τακώμεν έν άσβέστω, καὶ γλαυκὰ πέριξ συνάπαντ' ὴ.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<span class="allsmcap">To The Additional Examiner for 1875.</span><a id="FNanchor_307" href="#Footnote_307" class="fnanchor">[307]</a></p>

<p class="right"><i>July 29, 1874.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent8">QUEEN CRAM went straying</div>
    <div class="verse indent8">Where Tait was swaying,</div>
    <div class="verse indent8">In just hands weighing,</div>
    <div class="verse indent10">With care immense,</div>
    <div class="verse indent8">Dry proofs made pleasant</div>
    <div class="verse indent8">By Routh or Besant</div>
    <div class="verse indent8">For one who hasn’t</div>
    <div class="verse indent10">Got too much sense.</div>
    <div class="verse indent8">Nor marked how, quicker</div>
    <div class="verse indent8">Than mounts the liquor</div>
    <div class="verse indent8">In brains made thicker</div><span class="pagenum" id="Page_643">[Pg 643]</span>
    <div class="verse indent10">By College beer,</div>
    <div class="verse indent8">The murderous maiden,</div>
    <div class="verse indent8">Mistake, walks laden</div>
    <div class="verse indent0">With tips forgotten and slips so queer.</div>
  </div>
  <div class="stanza">
    <div class="verse indent8">How, like a spider,</div>
    <div class="verse indent8">She still spreads wider,</div>
    <div class="verse indent8">O'er bookwork, rider,</div>
    <div class="verse indent10">And problem too,</div>
    <div class="verse indent8">Her flimsy curtain</div>
    <div class="verse indent8">Of terms uncertain,</div>
    <div class="verse indent8">Till all seems dirt in</div>
    <div class="verse indent10">The marker's view.</div>
    <div class="verse indent8">For if Cram were not,</div>
    <div class="verse indent8">Which markers spare not,</div>
    <div class="verse indent8">Wise men would care not</div>
    <div class="verse indent10">To pluck too soon,</div>
    <div class="verse indent8">Seeing all life's season</div>
    <div class="verse indent8">Of budding<a id="FNanchor_308" href="#Footnote_308" class="fnanchor">[308]</a> reason</div>
    <div class="verse indent0">Finds good stiff work for a wooden spoon.</div>
  </div>
  <div class="stanza">
    <div class="verse indent8">As Tait sat joking,</div>
    <div class="verse indent8">And marked while smoking,</div>
    <div class="verse indent8">Still slyly poking</div>
    <div class="verse indent10">Where jests might hit,</div>
    <div class="verse indent8">She came, soft-gliding,</div>
    <div class="verse indent8">Her false face hiding,</div>
    <div class="verse indent8">Rich food providing</div>
    <div class="verse indent10">For Tait's sharp wit.</div>
    <div class="verse indent8">Through symbols tangled,</div>
    <div class="verse indent8">The Wranglers wrangled</div>
    <div class="verse indent8">Like sweet bells jangled</div>
    <div class="verse indent10">And out of tune.</div>
    <div class="verse indent8">For though their music</div>
    <div class="verse indent8">Would soon make <i>you</i> sick</div>
    <div class="verse indent0">The tides they measure and guide the moon.</div><span class="pagenum" id="Page_644">[Pg 644]</span>
    <div class="verse indent8">Cram found no cover</div>
    <div class="verse indent8">Wherein to hover,</div>
    <div class="verse indent8">For still above her</div>
    <div class="verse indent10">Tait held his pen,</div>
    <div class="verse indent8">Which, onward creeping,</div>
    <div class="verse indent8">Might find her sleeping,</div>
    <div class="verse indent8">But left her weeping</div>
    <div class="verse indent10">O’er ruined men.</div>
    <div class="verse indent8">For, like a blister,</div>
    <div class="verse indent8">Mistake, Cram’s sister,</div>
    <div class="verse indent8">Would wring and twist her</div>
    <div class="verse indent10">In awkward<a id="FNanchor_309" href="#Footnote_309" class="fnanchor">[309]</a> ways,</div>
    <div class="verse indent8">Till all the knowledge</div>
    <div class="verse indent8">Acquired at College</div>
    <div class="verse indent0">Had passed from thought<a id="FNanchor_310" href="#Footnote_310" class="fnanchor">[310]</a> in the last six days.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Professor Tait, Loquitur.</span></p>

<p class="right"><i>June 1877.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">WILL mounted ebonite disk</div>
    <div class="verse indent2">On smooth unyielding bearing,</div>
    <div class="verse indent0">When turned about with motion brisk</div>
    <div class="verse indent2">(Nor excitation sparing),</div>
    <div class="verse indent0">Affect the primitive repose,</div>
    <div class="verse indent2">Of + and — in a wire,</div>
    <div class="verse indent0">So that while either downward flows,</div>
    <div class="verse indent2">The other upwards shall aspire?</div>
    <div class="verse indent0">Describe the form and size of coil,</div>
    <div class="verse indent2">And other things that we may need,</div>
    <div class="verse indent0">Think not about increase of toil</div>
    <div class="verse indent2">Involved in work at double speed.</div>
    <div class="verse indent0">I can no more, my pen is bad,</div>
    <div class="verse indent2">It catches in the roughened page—</div>
    <div class="verse indent0">But answer us and make us glad,</div>
    <div class="verse indent2"><span class="allsmcap">Thou Anti-distance-action Sage!</span></div><span class="pagenum" id="Page_645">[Pg 645]</span>
    <div class="verse indent0">Yet have I still a thousand things to say,</div>
    <div class="verse indent2">But work of other kinds is pressing—</div>
    <div class="verse indent0">So your petitioner will ever pray</div>
    <div class="verse indent2">That your defence he triple <i>messing</i>.<a id="FNanchor_311" href="#Footnote_311" class="fnanchor">[311]</a></div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<span class="allsmcap">Answer to Tait.</span></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">THE mounted disk of ebonite</div>
    <div class="verse indent2">Has whirled before, nor whirled in vain;</div>
    <div class="verse indent0">Rowland of Troy, that doughty knight,</div>
    <div class="verse indent2">Convection currents did obtain<a id="FNanchor_312" href="#Footnote_312" class="fnanchor">[312]</a></div>
    <div class="verse indent0">In such a disk, of power to wheedle,</div>
    <div class="verse indent0">From its loved North the subtle<a id="FNanchor_313" href="#Footnote_313" class="fnanchor">[313]</a> needle.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">’Twas when Sir Rowland, as a stage</div>
    <div class="verse indent2">From Troy to Baltimore, took rest</div>
    <div class="verse indent0">In Berlin, there old Archimage,<a id="FNanchor_314" href="#Footnote_314" class="fnanchor">[314]</a></div>
    <div class="verse indent2">Armed him to follow up this quest;</div>
    <div class="verse indent0">Right glad to find himself possessor</div>
    <div class="verse indent0">Of the irrepressible Professor.<a id="FNanchor_315" href="#Footnote_315" class="fnanchor">[315]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But wouldst thou twirl<a id="FNanchor_316" href="#Footnote_316" class="fnanchor">[316]</a> that disk once more,</div>
    <div class="verse indent2">Then follow in Childe Rowland’s train,</div>
    <div class="verse indent0">To where in busy Baltimore</div>
    <div class="verse indent2">He brews<a id="FNanchor_317" href="#Footnote_317" class="fnanchor">[317]</a> the bantlings of his brain;</div>
    <div class="verse indent0">As he may do who still prefers</div>
    <div class="verse indent0">One Rowland to two Olivers.<a id="FNanchor_318" href="#Footnote_318" class="fnanchor">[318]</a></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But Rowland,—no, nor Oliver,—</div>
    <div class="verse indent2">Could get electromotive force,</div>
    <div class="verse indent0">Which fact and reason both aver,</div>
    <div class="verse indent2">Has change of some kind as its source,</div>
    <div class="verse indent0">Out of a disk in swift rotation</div>
    <div class="verse indent0">Without the least acceleration.<span class="pagenum" id="Page_646">[Pg 646]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But with your splendid roundabout</div>
    <div class="verse indent2">Of mighty power, new-hung and greasy,</div>
    <div class="verse indent0">With galvanometer so stout,</div>
    <div class="verse indent2">A new research would be as easy;</div>
    <div class="verse indent0">A test which might perchance disclose.</div>
    <div class="verse indent0">Which way the electric current flows.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Take then a coil of copper pure,</div>
    <div class="verse indent2">And fix it on your whirling table;</div>
    <div class="verse indent0">Place the electrodes firm and sure</div>
    <div class="verse indent2">As near the axis as you’re able,</div>
    <div class="verse indent0">And soon you’ll learn the way to work it.</div>
    <div class="verse indent0">With galvanometer in circuit.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Not while the coil in spinning sleeps,</div>
    <div class="verse indent2">On her smooth axle swift and steady;</div>
    <div class="verse indent0">But when against the stops she sweeps,</div>
    <div class="verse indent2">To watch the light-spot then be ready.</div>
    <div class="verse indent0">That you may learn from its deflexion</div>
    <div class="verse indent0">The electric current’s true direction.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">It may be that it does not move,</div>
    <div class="verse indent2">Or moves but for some other reason;</div>
    <div class="verse indent0">Then let it be your boast to prove</div>
    <div class="verse indent2">(Though some may think it out of season,</div>
    <div class="verse indent0">And worthy of a fossil Druid),</div>
    <div class="verse indent0">That there is no Electric Fluid.</div>
  </div>
</div>
</div>


<p class="nindc space-above2">
<span class="allsmcap">Report on Tait’s Lecture on Force:—B.A., 1876.</span></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">YE British Asses, who expect to hear</div>
    <div class="verse indent10">Ever some new thing,</div>
    <div class="verse indent0">I’ve nothing new to tell, but what, I fear,</div>
    <div class="verse indent10">May be a true thing.</div>
    <div class="verse indent0">For Tait comes with his plummet and his line,</div>
    <div class="verse indent10">Quick to detect your</div>
    <div class="verse indent0">Old bosh new dressed in what you call a fine</div>
    <div class="verse indent10">Popular lecture.<span class="pagenum" id="Page_647">[Pg 647]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Whence comes that most peculiar smattering.</div>
    <div class="verse indent10">Heard in our section?</div>
    <div class="verse indent0">Pure nonsense, to a scientific swing</div>
    <div class="verse indent10">Drilled to perfection?</div>
    <div class="verse indent0">That small word “Force,” they make<a id="FNanchor_319" href="#Footnote_319" class="fnanchor">[319]</a> a barber’s block,</div>
    <div class="verse indent10">Ready to put on</div>
    <div class="verse indent0">Meanings most strange and various, fit to shock</div>
    <div class="verse indent10">Pupils of Newton.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Ancient and foreign ignorance they throw</div>
    <div class="verse indent10">Into the bargain;</div>
    <div class="verse indent0">The shade of Leibniz<a id="FNanchor_320" href="#Footnote_320" class="fnanchor">[320]</a> mutters from below</div>
    <div class="verse indent10">Horrible jargon.</div>
    <div class="verse indent0">The phrases of last century in this</div>
    <div class="verse indent10">Linger to play tricks—</div>
    <div class="verse indent0"><i>Vis Viva and Vis Mortua</i> and <i>Vis</i></div>
    <div class="verse indent10"><i>Acceleratrix</i>:—</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Those long-nebbed words that to our text books still</div>
    <div class="verse indent10">Cling by their titles,</div>
    <div class="verse indent0">And from them creep, as entozoa will,</div>
    <div class="verse indent10">Into our vitals.</div>
    <div class="verse indent0">But see! Tait writes in lucid symbols clear</div>
    <div class="verse indent10">One small equation;</div>
    <div class="verse indent0">And Force becomes of Energy a mere</div>
    <div class="verse indent10">Space-variation.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Force, then, is Force, but mark you! not a thing,</div>
    <div class="verse indent10">Only a Vector;</div>
    <div class="verse indent0">Thy barbed arrows now have lost their sting,</div>
    <div class="verse indent10">Impotent spectre!</div>
    <div class="verse indent0">Thy reign, O Force! is over. Now no more</div>
    <div class="verse indent10">Heed we thine action;</div>
    <div class="verse indent0">Repulsion leaves us where we were before,</div>
    <div class="verse indent10">So does attraction.<span class="pagenum" id="Page_648">[Pg 648]</span></div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Both Action and Reaction now are gone.</div>
    <div class="verse indent10">Just ere they vanished,</div>
    <div class="verse indent0">Stress joined their hands in peace, and made them one;</div>
    <div class="verse indent10">Then they were banished.</div>
    <div class="verse indent0">The Universe is free from pole to pole,</div>
    <div class="verse indent10">Free from all forces.</div>
    <div class="verse indent0">Rejoice! ye stars—like blessed gods ye roll</div>
    <div class="verse indent10">On in your courses.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">No more the arrows of the Wrangler race,</div>
    <div class="verse indent10">Piercing shall wound you.</div>
    <div class="verse indent0">Forces no more, those symbols of disgrace,</div>
    <div class="verse indent10">Dare to surround you:</div>
    <div class="verse indent0">But those whose statements baffle all attacks,</div>
    <div class="verse indent10">Safe by evasion,—</div>
    <div class="verse indent0">Whose definitions, like a nose of wax,</div>
    <div class="verse indent10">Suit each occasion,—</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Whose unreflected rainbow far surpassed</div>
    <div class="verse indent10">All our inventions,</div>
    <div class="verse indent0">Whose very energy appears at last</div>
    <div class="verse indent10">Scant of dimensions:—</div>
    <div class="verse indent0">Are these the gods in whom ye put your trust,</div>
    <div class="verse indent10">Lordlings and ladies?</div>
    <div class="verse indent0">The hidden<a id="FNanchor_321" href="#Footnote_321" class="fnanchor">[321]</a> potency of cosmic dust</div>
    <div class="verse indent10">Drives them to Hades.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">While you, brave Tait! who know so well the way</div>
    <div class="verse indent10">Forces to scatter,</div>
    <div class="verse indent0">Calmly await the slow but sure decay,</div>
    <div class="verse indent10">Even of Matter.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
(<span class="allsmcap">Cats</span>) <span class="allsmcap">Cradle Song</span>,</p>

<p class="nindc"><i>By a Babe in Knots.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">PETER the Repeater,</div>
    <div class="verse indent2">Platted round a platter</div><span class="pagenum" id="Page_649">[Pg 649]</span>
    <div class="verse indent0">Slips of slivered paper,</div>
    <div class="verse indent2">Basting them with batter.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Hype ’em, slit ’em, twist ’em,</div>
    <div class="verse indent2">Lop-looped laps of paper;</div>
    <div class="verse indent0">Setting out the system</div>
    <div class="verse indent2">By the bones of Neper.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Clear your coil of kinkings</div>
    <div class="verse indent2">Into perfect plaiting,</div>
    <div class="verse indent0">Locking loops and linkings</div>
    <div class="verse indent2">Interpenetrating.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">Why should a man benighted,</div>
    <div class="verse indent2">Beduped, befooled, besotted,</div>
    <div class="verse indent0">Call knotful knittings plighted,</div>
    <div class="verse indent2">Not knotty but beknotte?</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">It’s monstrous, horrid, shocking,</div>
    <div class="verse indent2">Beyond the power of thinking,</div>
    <div class="verse indent0">Not to know, interlocking</div>
    <div class="verse indent2">Is no mere form of linking.</div>
  </div>
  <div class="stanza">
    <div class="verse indent0">But little Jacky Horner</div>
    <div class="verse indent2">Will teach you what is proper,</div>
    <div class="verse indent0">So pitch him, in his corner,</div>
    <div class="verse indent2">Your silver and your copper.</div>
  </div>
</div>
</div>

<p class="nindc space-above2">
<span class="allsmcap">To Hermann Stoffkraft, Ph.D.</span>, the Hero of a recent work called
“Paradoxical Philosophy.”</p>

<p class="nindc"><i>A Paradoxical Ode.</i></p>

<p class="nindc">[After Shelley.]</p>


<p class="nindc">I.</p>

<p class="right"><i>1878.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">MY soul is an entangled<a id="FNanchor_322" href="#Footnote_322" class="fnanchor">[322]</a> knot,</div>
    <div class="verse indent0">Upon a liquid vortex wrought</div><span class="pagenum" id="Page_650">[Pg 650]</span>
    <div class="verse indent6">By Intellect, in the Unseen residing.</div>
    <div class="verse indent4">And thine doth like a convict sit,</div>
    <div class="verse indent4">With marlinspike untwisting it,</div>
    <div class="verse indent6">Only to find its knottiness abiding;</div>
    <div class="verse indent4">Since all the tools for its untying</div>
    <div class="verse indent4">In four-dimensioned space are lying,</div>
    <div class="verse indent4">Wherein thy fancy intersperses</div>
    <div class="verse indent4">Long<a id="FNanchor_323" href="#Footnote_323" class="fnanchor">[323]</a> avenues of universes,</div>
    <div class="verse indent4">While Klein and Clifford fill the void</div>
    <div class="verse indent4">With one finite, unbounded homaloid,</div>
    <div class="verse indent0">And think the Infinite is now at last destroyed.</div>
  </div>
    <div class="poetry-container">II.</div>
  <div class="stanza">
    <div class="verse indent4">But when thy Science lifts her pinions</div>
    <div class="verse indent4">In Speculation’s wild dominions,</div>
    <div class="verse indent6">We treasure every dictum thou emittest,</div>
    <div class="verse indent4">While down the stream of Evolution</div>
    <div class="verse indent4">We drift, expecting no solution</div>
    <div class="verse indent6">But that of the survival of the fittest.</div>
    <div class="verse indent4">Till, in the twilight of the gods,</div>
    <div class="verse indent4">When earth and sun are frozen clods,</div>
    <div class="verse indent4">When, all its energy degraded,</div>
    <div class="verse indent4">Matter to æther shall have faded;</div>
    <div class="verse indent4">We, that is, all the work we’ve done,</div>
    <div class="verse indent4">As waves in æther, shall for ever run</div>
    <div class="verse indent0">In ever-widening<a id="FNanchor_324" href="#Footnote_324" class="fnanchor">[324]</a> spheres through heavens beyond the sun.</div>
  </div>
    <div class="poetry-container">III.</div>
  <div class="stanza">
    <div class="verse indent4">Great Principle of all we see,</div>
    <div class="verse indent4">Unending Continuity!</div>
    <div class="verse indent6">By thee are all our angles sweetly rounded,</div>
    <div class="verse indent4">By thee are our misfits adjusted,</div>
    <div class="verse indent4">And as I still in thee have trusted,</div>
    <div class="verse indent6">So trusting, let me never be confounded!</div><span class="pagenum" id="Page_651">[Pg 651]</span>
    <div class="verse indent4">Oh never may direct Creation</div>
    <div class="verse indent4">Break in upon my contemplation;</div>
    <div class="verse indent4">Still may thy causal chain, ascending,</div>
    <div class="verse indent4">Appear unbroken and unending,</div>
    <div class="verse indent4">While Residents in the Unseen—</div>
    <div class="verse indent4">Ions and Emanations—intervene,</div>
    <div class="verse indent0">And from my shrinking soul the Unconditioned screen.<a id="FNanchor_325" href="#Footnote_325" class="fnanchor">[325]</a></div>
  </div>
</div>
</div>


<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_275" href="#FNanchor_275" class="label">[275]</a> 
The occasion of this and of the following poem is
fully explained in a note from the Rev. Canon Farrar, which is here
subjoined:—</p>

<div class="blockquot">

<p class="nindc"><span class="allsmcap">To Prof. Campbell.</span></p>

<p class="right"><i>30th March 1882.</i></p>

<p><span class="allsmcap">My dear Sir</span>—I am sorry that the playful nonsense of my
undergraduate days should be printed, but if the lines will in
the slightest degree help to illustrate the extreme goodness and
kind-heartedness of Maxwell, I am content.</p>

<p>The circumstances were these. I went up to Cambridge very ill prepared
in mathematics, and my classical work was much hindered by the
considerable amount of mathematics required for a “Senior Optime,”
at which I aimed. In despair I used to say to Maxwell sometimes that
I should be “plucked” in mathematics, which in those days would have
prevented my taking classical honours. He, in his ready sympathy, and
the kind interest which he showed towards me, took my words <i>d’un
trop grand sérieux</i>, and wrote me the poetic apologue, in which he
advised me to aim at poetry like a lark, while I left mathematicians
to the distinction of being what Carlyle calls the “quickest and
completest of vegetables.” The point of his advice was that I should
give up the effort to win honour in the Mathematical Tripos, and should
be content with the Poll, or ordinary mathematical degree, reserving my
strength for the Classical Tripos. I sent him my reply the same day,
and I remember he pressed me to let him read it at one of our social
meetings—which I absolutely refused to allow him to do. Without this
word of explanation the verses would seem too nonsensical.—Yours very
truly,</p>

<p class="right"><span class="allsmcap">F. W. Farrar.</span></p>
</div>
</div>


<div class="footnote">

<p class="nind"><a id="Footnote_276" href="#FNanchor_276" class="label">[276]</a> 
Mr. Frere had accepted the living of Schillington, but
retained his fellowship for the customary “year of grace.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_277" href="#FNanchor_277" class="label">[277]</a> 
The genuine esteem expressed in the concluding words,
which alone in this youthful pasquinade are to be taken seriously,
must be the apology for inserting what Maxwell himself would not have
printed.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_278" href="#FNanchor_278" class="label">[278]</a> 
<i>v.r.</i> Stout.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_279" href="#FNanchor_279" class="label">[279]</a> 
C. G. S. system—the system of units founded on the
centimetre, gramme, and second. See report of Committee on units.
<i>Brit. Ass. Report</i> for 1873, p. 222.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_280" href="#FNanchor_280" class="label">[280]</a> 
Erg—the energy communicated by a dyne, acting through a
centimetre. See<a href="#Page_60"> p. 60</a>, note 2.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_281" href="#FNanchor_281" class="label">[281]</a> 
Tenth-metre = 1 metre \(\times 10^{-10}\).</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_282" href="#FNanchor_282" class="label">[282]</a> 
Megadyne = 1 dyne \(\times 10^{6}\). It is somewhat more
than the weight of a kilogramme.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_283" href="#FNanchor_283" class="label">[283]</a> 
Dyne—the force which, acting on a gramme for a second,
would give a velocity of a centimetre per second. The weight of a
gramme is about 980 dynes.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_284" href="#FNanchor_284" class="label">[284]</a> 
See <i>Sound and Music</i>, by Sedley Taylor, p. 89.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_285" href="#FNanchor_285" class="label">[285]</a> 
See Poinsot, <i>Théorie nouvelle de la rotation des
corps</i>.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_286" href="#FNanchor_286" class="label">[286]</a> 
See Prof. Ball on the Theory of Screws, <i>Phil.
Trans.</i>, 1873.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_287" href="#FNanchor_287" class="label">[287]</a> 
Nabla was the name of an Assyrian harp of the
shape \(\nabla\). \(\nabla\) is a quaternion operator \(\left(i
\dfrac{d}{dx}+j \dfrac{d}{dy}+k \dfrac{d}{dz}\right)\) invented by Sir
W. R. Hamilton, whose use and properties were first fully discussed
by Professor Tait, who is therefore called the “Chief Musician upon
Nabla.”</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_288" href="#FNanchor_288" class="label">[288]</a> 
<i>v.r.</i> They melt.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_289" href="#FNanchor_289" class="label">[289]</a> 
<i>v.r.</i> Grow.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_290" href="#FNanchor_290" class="label">[290]</a> 
<i>v.r.</i> dish.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_291" href="#FNanchor_291" class="label">[291]</a> 
<i>v.r.</i> like to.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_292" href="#FNanchor_292" class="label">[292]</a> 
<i>v.r.</i> By Jove, I’ll have to.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_293" href="#FNanchor_293" class="label">[293]</a> 
<i>v.r.</i> What fish, what whale is this, that through.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_294" href="#FNanchor_294" class="label">[294]</a> 
<i>v.r.</i> vacuous.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_295" href="#FNanchor_295" class="label">[295]</a> 
<i>v.r.</i> I.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_296" href="#FNanchor_296" class="label">[296]</a> 
<i>v.r.</i> about.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_297" href="#FNanchor_297" class="label">[297]</a> 
<i>v.r.</i> bows down.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_298" href="#FNanchor_298" class="label">[298]</a> 
<i>v.r.</i> That.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_299" href="#FNanchor_299" class="label">[299]</a> 
<i>v.r.</i> May be.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_300" href="#FNanchor_300" class="label">[300]</a> 
<i>v.r.</i> tower.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_301" href="#FNanchor_301" class="label">[301]</a> 
<i>v.r.</i> endless.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_302" href="#FNanchor_302" class="label">[302]</a> 
The “Red Lions” are a club formed by Members of the
British Association, to meet for relaxation after the graver labours of
the day.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_303" href="#FNanchor_303" class="label">[303]</a> 
“Leonum arida nutrix.”—Horace.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_304" href="#FNanchor_304" class="label">[304]</a> 
<i>Statique Expérimentale et Théorique des Liquides
soumis aux seules Forces Moléculaires</i>. Par J. Plateau, Professeur à
l'Université de Gaud.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_305" href="#FNanchor_305" class="label">[305]</a> 
Accentum nolim mutare.—C.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_306" href="#FNanchor_306" class="label">[306]</a> 
Var. 1. 'Iερνικὸς suppedidat nescio quis. Mihi quidem
haud displicet.—[Ed.]</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_307" href="#FNanchor_307" class="label">[307]</a> 
Compare Mr. Swinburne’s <i>Bothwell</i>, Act
<span class="allsmcap">II.</span> Sc. 17.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_308" href="#FNanchor_308" class="label">[308]</a> 
<i>v.r.</i> opening.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_309" href="#FNanchor_309" class="label">[309]</a> 
<i>v.r.</i> secret.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_310" href="#FNanchor_310" class="label">[310]</a> 
<i>v.r.</i> away.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_311" href="#FNanchor_311" class="label">[311]</a> 
<i>Illi robur et aes triplex!</i> (Horace.)</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_312" href="#FNanchor_312" class="label">[312]</a> 
Berlin Monats-berichte.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_313" href="#FNanchor_313" class="label">[313]</a> 
<i>v.r.</i> pensile.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_314" href="#FNanchor_314" class="label">[314]</a> 
<i>i.e.</i> Helmholtz—the chief magician!</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_315" href="#FNanchor_315" class="label">[315]</a> 
See Prof. Sylvester’s Address to the Johns Hopkins
University.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_316" href="#FNanchor_316" class="label">[316]</a> 
<i>v.r.</i> whirl.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_317" href="#FNanchor_317" class="label">[317]</a> 
<i>v.r.</i> rears.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_318" href="#FNanchor_318" class="label">[318]</a> 
Heaviside and Lodge, see p. 374.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_319" href="#FNanchor_319" class="label">[319]</a> 
<i>v.r.</i> is made.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_320" href="#FNanchor_320" class="label">[320]</a> 
<i>v.r.</i> sage of Leipzig.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_321" href="#FNanchor_321" class="label">[321]</a> 
<i>v.r.</i> secret.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_322" href="#FNanchor_322" class="label">[322]</a> 
<i>v.r.</i> ’s an amphicheiral.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_323" href="#FNanchor_323" class="label">[323]</a> 
<i>v.r.</i> Whole.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_324" href="#FNanchor_324" class="label">[324]</a> 
<i>v.r.</i> swift expanding.</p>

</div>

<div class="footnote">

<p class="nind"><a id="Footnote_325" href="#FNanchor_325" class="label">[325]</a> 
<i>v.r.</i></p>

<div class="poetry-container">
<div class="poetry">
  <div class="stanza">
    <div class="verse indent0">And where that chain is lost to sight</div>
    <div class="verse indent0">Let viewless fancies guide my darkling flight,</div>
    <div class="verse indent0">Through atom-haunted worlds in series infinite.</div>
  </div>
</div>
</div>
</div>
</div>


<p class="nindc space-above2 space-below2">END OF PART III.</p>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<p><span class="pagenum" id="Page_653">[Pg 653]</span></p>
<h2 class="nobreak" id="INDEX">INDEX.</h2>
</div>

<ul class="index">
<li class="ifrst"><span class="allsmcap">Aberdeen</span>, application for professorship</li>
<li class="isub1">at, pp. <a href="#Page_247">247</a>, <a href="#Page_250">250</a>.</li>

<li class="indx"> Maxwell’s appointment as professor,</li>
<li class="isub1"><a href="#Page_256">256.</a></li>
<li class="isub1">commencement of work, <a href="#Page_257">257</a>.</li>
<li class="isub1">prepares inaugural lecture, <a href="#Page_263">263</a>.</li>
<li class="isub1">work ends by amalgamation of the</li>
<li class="isub1">colleges, <a href="#Page_278">278</a>.</li>

<li class="indx">Adams, discovery of Neptune, <a href="#Page_85">85</a>; prize</li>
<li class="isub1">(see Saturn’s rings).</li>
<li class="isub1">W. G., successor to Maxwell at</li>
<li class="isub1">King’s College, <a href="#Page_344">344</a>.</li>
<li class="isub1">letter to, <a href="#Page_384">384</a>.</li>

<li class="indx">Ampère’s formula, <a href="#Page_330">330</a>, <a href="#Page_331">331</a>.</li>
<li class="isub1">electrical investigations, <a href="#Page_523">523</a>, <a href="#Page_525">525</a>.</li>

<li class="indx">Analogies, the subject of an essay at</li>
<li class="isub1">Cambridge, <a href="#Page_235">235</a>.</li>

<li class="indx">Andrews, conversion of energy in</li>
<li class="isub1">chemistry, <a href="#Page_335">335</a>.</li>

<li class="indx">Apioid, delineation of, <a href="#Page_87">87</a>, <a href="#Page_88">88</a>, <a href="#Page_98">98-104</a>.</li>

<li class="indx">Arago, <a href="#Page_525">525</a>.</li>

<li class="indx">Archery in the Happy Valley, a subject</li>
<li class="isub1">of youthful verse, <a href="#Page_64">64</a>.</li>

<li class="indx">Arthur’s Seat, glacier markings on rocks</li>
<li class="isub1">of, a novel subject of interest (in</li>
<li class="isub1">1846), <a href="#Page_73">73</a>.</li>
<li class="isub1">employed by Professor Forbes to</li>
<li class="isub1">show his class mode of barometric</li>
<li class="isub1">observation, <a href="#Page_116">116</a>, <a href="#Page_130">130</a>.</li>

<li class="indx">Artisan students, class at Aberdeen,</li>
<li class="isub1"><a href="#Page_283">283</a>, <a href="#Page_291">291</a>, <a href="#Page_292">292</a>.</li>

<li class="indx">Atoms, article on, by Maxwell, for</li>
<li class="isub1"><i>Encyclopœdia Britannica</i>, <a href="#Page_390">390</a>, <a href="#Page_561">561</a>.</li>

<li class="indx">Autobiography, the subject of an essay</li>
<li class="isub1">at Cambridge, <a href="#Page_244">244</a>.</li>


<li class="ifrst"><span class="allsmcap">Bakerian Lecture</span> (1866) on viscosity of</li>
<li class="isub1">gases, <a href="#Page_325">325</a>.</li>

<li class="indx">Basket-making, an amusement in</li>
<li class="isub1">childhood--sketch by J. W., <a href="#Page_31">31</a>.</li>

<li class="indx">Beauty, subject of essay at Cambridge,</li>
<li class="isub1"><a href="#Page_231">231.</a></li>

<li class="indx">Bell, Professor Graham (telephone), <a href="#Page_361">361</a>,</li>
<li class="isub1"><a href="#Page_363">363.</a></li>

<li class="indx">Benson’s Manual of Colour, <a href="#Page_346">346</a>, <a href="#Page_379">379</a>.</li>

<li class="indx">Berkeley’s <i>Theory of Vision</i>,</li>
<li class="isub1">Maxwell’s-study of, <a href="#Page_198">198</a>, <a href="#Page_207">207</a>.</li>

<li class="indx">Bernoulli, allusion to his account of</li>
<li class="isub1">cycloidal oscillations, <a href="#Page_226">226</a>.</li>
<li class="isub1">his theory of gases, <a href="#Page_314">314</a>, <a href="#Page_332">332</a>.</li>
<li class="isub1">place in history of dynamics, <a href="#Page_398">398</a>,</li>
<li class="isub1"><a href="#Page_560">560.</a></li>

<li class="indx">Biography, thoughts about, <a href="#Page_244">244</a>.</li>

<li class="indx">Birmingham, visit to, proposed by J. C.</li>
<li class="isub1">M.’s father, <a href="#Page_7">7</a> <i>note</i>, <a href="#Page_185">185</a>.</li>
<li class="isub1">and carried out, <a href="#Page_168">168</a>.</li>

<li class="indx">Blackburn (Mrs. Hugh, <i>née</i> Jemima</li>
<li class="isub1">Wedderburn), her portrait of</li>
<li class="isub1">J. C. M., <a href="#Page_11">11</a>.</li>
<li class="isub1">a frequent visitor at Glenlair, in</li>
<li class="isub1">J. C. M.’s early days, <a href="#Page_36">36</a>.</li>
<li class="isub1">her pictorial genius, <a href="#Page_36">36</a>.</li>
<li class="isub1">her sketches of family groups, <a href="#Page_5">5</a>,</li>
<li class="isub1"><a href="#Page_30">30</a>, <a href="#Page_31">31</a>, <a href="#Page_38">38</a>, <a href="#Page_40">40</a>, <a href="#Page_42">42</a>, <a href="#Page_46">46</a>, <a href="#Page_62">62</a>.</li>
<li class="isub1">occupations at “Old 31,” <a href="#Page_52">52</a>.</li>
<li class="isub1">a picture of hers described by J. C.</li>
<li class="isub1">M., <a href="#Page_270">270</a>.</li>
<li class="isub1">Professor Hugh, his advice as to</li>
<li class="isub1">Maxwell’s going to Cambridge,</li>
<li class="isub1"><a href="#Page_131">131</a> <i>note</i>, <a href="#Page_132">132</a>.</li>
<li class="isub1">and in choice of a college there,</li>
<li class="isub1"><a href="#Page_146">146.</a></li>

<li class="indx">Boltzmann, <a href="#Page_569">569</a>.</li>

<li class="indx">Boole’s mathematical analysis of logic,</li>
<li class="isub1"><a href="#Page_113">113</a>, <a href="#Page_378">378</a>.</li>

<li class="indx">Brewster, Sir David, his demonstrations</li>
<li class="isub1">with Wheatstone’s stereoscope,</li>
<li class="isub1"><a href="#Page_125">125.</a></li>
<li class="isub1">Maxwell’s youthful debate with</li>
<li class="isub1">him at British Association, <a href="#Page_144">144</a>.</li>
<li class="isub1">at British Association (1855), <a href="#Page_203">203</a>,</li>
<li class="isub1"><a href="#Page_215">215</a>, <a href="#Page_216">216</a>.</li>

<li class="indx">British Association, Maxwell’s youthful</li>
<li class="isub1">appearance disputing a point</li>
<li class="isub1">with Sir David Brewster, <a href="#Page_144">144</a>.</li>
<li class="isub1">Maxwell present at meeting of (in</li>
<li class="isub1">1855), <a href="#Page_203">203</a>.</li>
<li class="isub1">meeting at Oxford (in 1860), <a href="#Page_314">314</a>.</li>
<li class="isub1">committee on electrical standards,</li>
<li class="isub1"><a href="#Page_316">316</a>, <a href="#Page_343">343</a>.</li>


<li class="indx">British Association--</li>
<li class="isub1">meeting at Liverpool (1870), Maxwell</li>
<li class="isub1">president of Section A</li>
<li class="isub1">(Mathematics and Physics), <a href="#Page_326">326</a>.</li>
<li class="isub1">apparatus for committee on electrical</li>
<li class="isub1">standards deposited in Cavendish</li>
<li class="isub1">Laboratory, <a href="#Page_353">353</a>.</li>

<li class="indx">Bradford (1873), Maxwell’s discourse</li>
<li class="isub1">on molecules, <a href="#Page_358">358</a>.</li>
<li class="isub1">committee for verifying Ohm’s law,</li>
<li class="isub1"><a href="#Page_365">365.</a></li>
<li class="isub1">meeting at Belfast (1874), last attended</li>
<li class="isub1">by Maxwell, <a href="#Page_372">372</a>.</li>
<li class="isub1">his paraphrase of the President’s</li>
<li class="isub1">address, <a href="#Page_373">373</a>.</li>

<li class="indx">Buckle’s <i>History of Civilisation</i>, first</li>
<li class="isub1">impression of, <a href="#Page_295">295</a>.</li>
<li class="isub1">allusion to, <a href="#Page_458">458</a>.</li>

<li class="indx">Butler, Rev. H., D.D., Head Master of</li>
<li class="isub1">Harrow School, a friend of Maxwell</li>
<li class="isub1">at college, <a href="#Page_168">168</a>.</li>
<li class="isub1">his reminiscences of Maxwell, <a href="#Page_422">422</a>.</li>


<li class="ifrst"><span class="allsmcap">Cambridge</span>, causes of delay in decision</li>
<li class="isub1">as to entering university, <a href="#Page_130">130</a>.</li>
<li class="isub1">choice of a college, <a href="#Page_146">146</a>.</li>
<li class="isub1">Peterhouse fixed upon in first</li>
<li class="isub1">instance, <a href="#Page_146">146</a>.</li>
<li class="isub1">migration to Trinity in second term,</li>
<li class="isub1"><a href="#Page_147">147.</a></li>
<li class="isub1">mathematical examinations 1854,</li>
<li class="isub1">Maxwell second wrangler, and he</li>
<li class="isub1">and Routh bracketed Smith’s</li>
<li class="isub1">Prizemen, <a href="#Page_176">176</a>.</li>
<li class="isub1">Maxwell elected Fellow of Trinity,</li>
<li class="isub1"><a href="#Page_204">204.</a></li>
<li class="isub1">essays for meetings of society at,</li>
<li class="isub1"><a href="#Page_223">223</a>-<a href="#Page_246">246</a>, also <a href="#Page_434">434</a>-<a href="#Page_463">463.</a></li>
<li class="isub1">influence as examiner at, <a href="#Page_325">325</a>, <a href="#Page_357">357</a>.</li>
<li class="isub1">chair of experimental physics</li>
<li class="isub1">founded 1871, <a href="#Page_348">348</a>.</li>
<li class="isub1">Maxwell’s inaugural lecture in this</li>
<li class="isub1">chair, <a href="#Page_354">354</a>.</li>
<li class="isub1">his work as professor, <a href="#Page_364">364</a>.</li>

<li class="indx">Carmichael, A. N., J. C. M.’s master in</li>
<li class="isub1">Greek and Latin at Edinburgh</li>
<li class="isub1">Academy, <a href="#Page_50">50</a>.</li>

<li class="indx">Cartesian space equations, <a href="#Page_380">380</a>.</li>

<li class="indx">Cavendish, Hon. Henry, F.R.S., his</li>
<li class="isub1">electrical researches collected and</li>
<li class="isub1">edited by Maxwell, <a href="#Page_374">374</a>, <a href="#Page_375">375</a>,</li>
<li class="isub1"><a href="#Page_514">514</a>, <a href="#Page_555">555</a>.</li>
<li class="isub1">reference to this work in a letter</li>
<li class="isub1">of Maxwell to W. Garnett, <a href="#Page_389">389</a>.</li>
<li class="isub1">Laboratory (Cambridge), Maxwell’s</li>
<li class="isub1">hereditary genius shown in planning,</li>
<li class="isub1"><a href="#Page_9">9.</a></li>
<li class="isub1">Maxwell’s arrangements in its</li>
<li class="isub1">design and erection, <a href="#Page_325">325</a>,</li>
<li class="isub1"><a href="#Page_350">350</a>, <a href="#Page_353">353</a>.</li>

<li class="indx">Cavendish Laboratory, Maxwell’s letter</li>
<li class="isub1">to the Vice-Chancellor on the subject,</li>
<li class="isub1"><a href="#Page_352">352.</a></li>

<li class="indx">Cay, Charles Hope, a cousin of J. C. M.,</li>
<li class="isub1">his visit to Glenlair, <a href="#Page_312">312</a>.</li>
<li class="isub1">his correspondence with Maxwell,</li>
<li class="isub1"><a href="#Page_324">324</a>, <a href="#Page_337">337</a>, <a href="#Page_341">341</a>, <a href="#Page_343">343</a>.</li>
<li class="isub1">Miss Jane, maternal aunt of J. C.</li>
<li class="isub1">M., <a href="#Page_13">13</a>.</li>
<li class="isub1">letter to her from J. C. M.’s</li>
<li class="isub1">parents in early days, <a href="#Page_27">27</a>.</li>
<li class="isub1">letter from J. C. M. (<i>Æt.</i> 8½),</li>
<li class="isub1"><a href="#Page_33">33.</a></li>
<li class="isub1">influence of her tastes and</li>
<li class="isub1">occupations, <a href="#Page_36">36</a>.</li>
<li class="isub1">her interest in J. C. M.’s education,</li>
<li class="isub1">and letters to him as</li>
<li class="isub1">a boy, <a href="#Page_41">41</a>, <a href="#Page_44">44</a>.</li>
<li class="isub1">her care in J. C. M.’s religious</li>
<li class="isub1">education, <a href="#Page_55">55</a>.</li>
<li class="isub1">J. C. M. domiciled with her in</li>
<li class="isub1">1844, <a href="#Page_67">67</a>.</li>
<li class="isub1">Maxwell’s correspondence with</li>
<li class="isub1">her, <a href="#Page_169">169</a>, <a href="#Page_180">180</a>, <a href="#Page_184">184</a>, <a href="#Page_186">186</a>,</li>
<li class="isub1"><a href="#Page_193">193</a>, <a href="#Page_195">195</a>, <a href="#Page_208">208</a>, <a href="#Page_253">253</a>, <a href="#Page_281">281</a>.</li>
<li class="isub1">John (Sheriff of Linlithgow), maternal</li>
<li class="isub1">uncle of J. C. M., <a href="#Page_7">7</a>.</li>
<li class="isub1">companion of Maxwell senior,</li>
<li class="isub1">at meetings of Edinburgh</li>
<li class="isub1">Royal Society, <a href="#Page_8">8</a>, <a href="#Page_13">13</a>.</li>
<li class="isub1">his scientific occupations a</li>
<li class="isub1">source of interest to J. C.</li>
<li class="isub1">M., <a href="#Page_67">67</a>.</li>
<li class="isub1">accompanies J. C. M. in visiting</li>
<li class="isub1">Mr. Nicol (inventor of</li>
<li class="isub1">polariscope), <a href="#Page_84">84</a>.</li>
<li class="isub1">a friend of Sir W. Hamilton,</li>
<li class="isub1"><a href="#Page_108">108.</a></li>
<li class="isub1">sends J. C. M. a “Nicol’s</li>
<li class="isub1">prism,” <a href="#Page_123">123</a>.</li>
<li class="isub1">R. D., maternal uncle of J. C. M.,</li>
<li class="isub1"><a href="#Page_13">13.</a></li>
<li class="isub1">his letter to Miss Cay after</li>
<li class="isub1">death of Mr. John C. Maxwell,</li>
<li class="isub1"><a href="#Page_254">254.</a></li>
<li class="isub1">R. H., Esq., of N. Charlton, maternal</li>
<li class="isub1">grand-father of J. C. M.,</li>
<li class="isub1"><a href="#Page_2">2</a>, <a href="#Page_22">22</a>.</li>
<li class="isub1">mention of him in Lockhart s</li>
<li class="isub1"><i>Life of Scott</i>, <a href="#Page_13">13</a>.</li>
<li class="isub1">William Dyce (cousin of J. C. M.)</li>
<li class="isub1">his letter describing meeting</li>
<li class="isub1">of British Association</li>
<li class="isub1">(1855), <a href="#Page_215">215</a>.</li>
<li class="isub1">employed by J. C. M. to build</li>
<li class="isub1">a bridge over the Urr, <a href="#Page_323">323</a>.</li>
<li class="isub1">his recollections of Maxwell,</li>
<li class="isub1"><a href="#Page_324">324.</a></li>

<li class="indx">Charlton, N., Northumberland, home of</li>
<li class="isub1">J. C. M. ’s mother’s family, <a href="#Page_2">2</a>.</li>


<li class="indx">Chemistry class at University of Edinburgh</li>
<li class="isub1">attended by Maxwell under</li>
<li class="isub1">Professor Gregory, and practical</li>
<li class="isub1">chemistry under Mr. Kemp, <a href="#Page_107">107</a>, <a href="#Page_126">126</a>.</li>

<li class="indx">Chrystal, Professor, associated with</li>
<li class="isub1">Maxwell in committee of British</li>
<li class="isub1">Association for verifying Ohm’s law,</li>
<li class="isub1"><a href="#Page_365">365</a>, <a href="#Page_392">392</a>.</li>

<li class="indx">Clausius, mathematical investigations</li>
<li class="isub1">suggested by his theory of gases,</li>
<li class="isub1"><a href="#Page_332">332</a>, <a href="#Page_336">336</a>, <a href="#Page_342">342</a>, <a href="#Page_380">380</a>, <a href="#Page_399">399</a>, <a href="#Page_562">562</a>,
    <a href="#Page_564">564</a>,</li>
<li class="isub1">567.</li>

<li class="indx">Clerk, George, afterwards Sir George</li>
<li class="isub1">Clerk Maxwell (great grand-father</li>
<li class="isub1">in the direct male line</li>
<li class="isub1">of J. C. M.), his betrothal and</li>
<li class="isub1">marriage to his cousin, Dorothea</li>
<li class="isub1">Maxwell, heiress of Middlebie,</li>
<li class="isub1"><a href="#Page_19">19</a>, <a href="#Page_23">23</a>.</li>
<li class="isub1">Sir George (of Penicuik), brother of</li>
<li class="isub1">John Clerk Maxwell and uncle</li>
<li class="isub1">of J. C. M., <a href="#Page_322">322</a>.</li>
<li class="isub1">Captain James, paternal grand-father</li>
<li class="isub1">of J. C. M., <a href="#Page_3">3</a> and <i>note</i>, <a href="#Page_22">22</a>.</li>
<li class="isub1">Mrs. James (<i>née</i> Janet Irving),</li>
<li class="isub1">paternal grand-mother of J. C.</li>
<li class="isub1">M., <a href="#Page_4">4</a>, <a href="#Page_21">21</a>.</li>
<li class="isub1">John, of Eldin, brother to Sir</li>
<li class="isub1">George Clerk (J. C. M.’s great-grandfather),</li>
<li class="isub1">and author of a</li>
<li class="isub1">book on naval tactics, <a href="#Page_19">19-21</a>.</li>
<li class="isub1">John (son of the above), a distinguished</li>
<li class="isub1">lawyer and Lord of</li>
<li class="isub1">Session (Lord Eldin), <a href="#Page_19">19</a>, <a href="#Page_21">21</a> and</li>
<li class="isub1"><i>note</i>.</li>
<li class="isub1">Sir John, of Penicuik, elder brother</li>
<li class="isub1">of James (paternal grand-father of</li>
<li class="isub1">J. C. M.), <a href="#Page_3">3</a>, <a href="#Page_22">22</a>.</li>
<li class="isub1">Sir John (of Penicuik, Baron of</li>
<li class="isub1">Exchequer), great-great-grand-father</li>
<li class="isub1">in the direct male line of</li>
<li class="isub1">J. C. M., <a href="#Page_19">19</a>.</li>
<li class="isub1">John, afterwards John Clerk Maxwell,</li>
<li class="isub1">of Middlebie (or Glenlair),</li>
<li class="isub1">the father of J. C. M. (see Maxwell,</li>
<li class="isub1">John Clerk).</li>
<li class="isub1">William, brother of Lord Eldin,</li>
<li class="isub1">and friend of young Walter Scott,</li>
<li class="isub1"><a href="#Page_21">21</a> and <i>note</i>.</li>
<li class="isub1">William, married Agnes Maxwell,</li>
<li class="isub1">and left only child, Dorothea</li>
<li class="isub1">Maxwell, heiress of Middlebie,</li>
<li class="isub1">who married her cousin, George</li>
<li class="isub1">Clerk, as above, <a href="#Page_23">23</a>.</li>
<li class="isub1">Clerks (of Penicuik), their family traits</li>
<li class="isub1">and <i>Coterie-Sprache</i>, <a href="#Page_5">5</a>, <a href="#Page_6">6</a>.</li>
<li class="isub1">note upon their descent and history,</li>
<li class="isub1"><a href="#Page_16">16</a>-<a href="#Page_22">22.</a></li>

<li class="indx">Colour-box, <a href="#Page_198">198</a>, <a href="#Page_314">314</a>, <a href="#Page_318">318</a>, <a href="#Page_334">334</a>, <a href="#Page_335">335</a>,</li>
<li class="isub1"><a href="#Page_337">337</a>, <a href="#Page_347">347</a>, <a href="#Page_476">476</a>.</li>

<li class="indx">Colour-blindness, phenomena of, investigated,</li>
<li class="isub1">soon after Cambridge</li>
<li class="isub1">degree, <a href="#Page_198">198</a>.</li>
<li class="isub1">results communicated to Dr.</li>
<li class="isub1">George Wilson, <a href="#Page_203">203</a>, <a href="#Page_217">217</a>.</li>
<li class="isub1">account of his investigations, <a href="#Page_474">474</a>,</li>
<li class="isub1"><a href="#Page_482">482.</a></li>

<li class="indx">Colours, early questions about, <a href="#Page_31">31</a>.</li>
<li class="isub1">order of ideas upon, <a href="#Page_84">84</a> <i>note</i>.</li>
<li class="isub1">investigations upon, commenced</li>
<li class="isub1">after the Cambridge degree, <a href="#Page_198">198</a>,</li>
<li class="isub1"><a href="#Page_209">209</a>, <a href="#Page_211">211</a>, <a href="#Page_212">212</a>, <a href="#Page_261">261</a>, <a href="#Page_268">268</a>.</li>
<li class="isub1">his triangle of, <a href="#Page_209">209</a>.</li>
<li class="isub1">remarks on Maxwell’s investigations,</li>
<li class="isub1">by Professor Stokes,</li>
<li class="isub1"><a href="#Page_287">287.</a></li>
<li class="isub1">lecture upon, at Royal Institution</li>
<li class="isub1">1861, <a href="#Page_315">315</a>.</li>
<li class="isub1">paper upon colour-vision at different</li>
<li class="isub1">points of the retina, <a href="#Page_327">327</a>.</li>
<li class="isub1">letters to C. J. Monro on colours,</li>
<li class="isub1"><a href="#Page_347">347</a>, <a href="#Page_379">379</a>.</li>

<li class="indx">Colour-top, <a href="#Page_198">198</a>, <a href="#Page_332">332</a>, <a href="#Page_469">469</a>.</li>

<li class="indx">Colour-vision, lecture on (B. A. 1870),</li>
<li class="isub1"><a href="#Page_327">327</a>, <a href="#Page_354">354</a>.</li>
<li class="isub1">account of Maxwell’s experiments</li>
<li class="isub1">on, <a href="#Page_466">466-491</a>.</li>

<li class="indx">Conical pendulum, MS. on, <a href="#Page_87">87</a>.</li>

<li class="indx">Craigenputtock, incident of pilgrimage</li>
<li class="isub1">to, <a href="#Page_257">257</a> <i>note</i>.</li>


<li class="ifrst"><span class="allsmcap">Descartes</span>, his ovals identified with</li>
<li class="isub1">those delineated by Maxwell by</li>
<li class="isub1">new and simpler method, <a href="#Page_77">77</a>, <a href="#Page_79">79</a>,</li>
<li class="isub1"><a href="#Page_88">88.</a></li>
<li class="isub1">laws of, <a href="#Page_398">398</a>.</li>
<li class="isub1">on matter and extension, <a href="#Page_436">436</a>.</li>

<li class="indx">Determinism, <a href="#Page_434">434-444</a>.</li>

<li class="indx">Devil-on-two-sticks, a favourite game,</li>
<li class="isub1"><a href="#Page_65">65</a>, <a href="#Page_117">117</a>, <a href="#Page_129">129</a>, <a href="#Page_135">135</a>, <a href="#Page_251">251</a>.</li>

<li class="indx">Devonshire, Duke of, his gift of a</li>
<li class="isub1">physical laboratory to Cambridge,</li>
<li class="isub1"><a href="#Page_348">348.</a></li>

<li class="indx">Dewar, Principal, of Marischal College,</li>
<li class="isub1">Aberdeen, <a href="#Page_275">275</a>.</li>
<li class="isub1">his daughter Katherine Mary D.</li>
<li class="isub1">married to J. C. M., <a href="#Page_276">276</a>.</li>

<li class="indx">Dielectric, Maxwell’s theory of action</li>
<li class="isub1">in, <a href="#Page_559">559</a>.</li>

<li class="indx">Dynamical top, Maxwell’s paper on, <a href="#Page_287">287</a>,</li>
<li class="isub1"><a href="#Page_500">500.</a></li>

<li class="indx">Dynamics, Maxwell’s investigations in,</li>
<li class="isub1"><a href="#Page_465">465</a>, <a href="#Page_498">498-501</a>.</li>
<li class="isub1">letters to W. Garnett on, <a href="#Page_398">398</a>, <a href="#Page_399">399</a>.</li>


<li class="ifrst"><span class="allsmcap">Edinburgh Academy</span> chosen as the</li>
<li class="isub1">school for J. C. M., <a href="#Page_44">44</a>.</li>
<li class="isub1">early days at, <a href="#Page_45">45-61</a>.</li>
<li class="isub1">rector’s class under Archdeacon</li>
<li class="isub1">Williams, <a href="#Page_66">66</a>.</li>


<li class="indx">Edinburgh University, Maxwell’s entrance at, <a href="#Page_105">105</a>.</li>

<li class="indx">Edison’s loud-speaking telephone, <a href="#Page_363">363</a>.</li>
<li class="isub1">phonograph, <a href="#Page_455">455</a>.</li>

<li class="indx">Elastic solids, Maxwell’s investigations</li>
<li class="isub1">on, <a href="#Page_106">106</a>, <a href="#Page_126">126</a>, <a href="#Page_127">127</a>, <a href="#Page_133">133</a>, <a href="#Page_465">465</a>, <a href="#Page_491">491</a>,
    <a href="#Page_491">491-496</a>.</li>

<li class="indx">Elasticity, a subject of lectures at Aberdeen,</li>
<li class="isub1"><a href="#Page_295">295</a>, <a href="#Page_301">301</a>.</li>

<li class="indx">Eldin (see Clerk, John).</li>

<li class="indx">Electricity, a subject of Maxwell’s study</li>
<li class="isub1">while at Edinburgh University,</li>
<li class="isub1"><a href="#Page_106">106</a>, <a href="#Page_118">118</a>, <a href="#Page_120">120</a>.</li>
<li class="isub1">resumed immediately after the</li>
<li class="isub1">Cambridge degree, <a href="#Page_199">199</a>, <a href="#Page_204">204</a>.</li>
<li class="isub1">a subject of lectures at Aberdeen,</li>
<li class="isub1"><a href="#Page_291">291</a>, <a href="#Page_302">302</a>.</li>
<li class="isub1">Maxwell a member of committee</li>
<li class="isub1">(British Association) for determining</li>
<li class="isub1">standard of resistance,</li>
<li class="isub1"><a href="#Page_316">316.</a></li>
<li class="isub1">Maxwell’s comparison of electromagnetic</li>
<li class="isub1">and electrostatic units,</li>
<li class="isub1"><a href="#Page_317">317</a>, <a href="#Page_336">336</a>, <a href="#Page_337">337</a>, <a href="#Page_545">545</a>.</li>
<li class="isub1">Maxwell’s great work on, takes</li>
<li class="isub1">shape 1866-1870, <a href="#Page_320">320</a>.</li>
<li class="isub1">general mathematical propositions</li>
<li class="isub1">relating to, <a href="#Page_330">330</a>.</li>
<li class="isub1">instrument for measuring effects</li>
<li class="isub1">of, through different media,</li>
<li class="isub1"><a href="#Page_334">334.</a></li>
<li class="isub1">one of the primary objects of the</li>
<li class="isub1">chair of experimental physics at</li>
<li class="isub1">Cambridge, <a href="#Page_350">350</a>.</li>
<li class="isub1">Maxwell appointed one of committee</li>
<li class="isub1">of British Association for</li>
<li class="isub1">verifying Ohm’s law. Reported</li>
<li class="isub1">at Glasgow 1876, <a href="#Page_365">365</a>.</li>
<li class="isub1">publication of book on electricity</li>
<li class="isub1">and magnetism, <a href="#Page_374">374</a>.</li>
<li class="isub1">various work relating to, <a href="#Page_375">375</a>.</li>
<li class="isub1">posthumous work on, <a href="#Page_288">288</a> <i>note</i>, <a href="#Page_354">354</a>.</li>
<li class="isub1">synthetical account of Maxwell’s</li>
<li class="isub1">contributions to science of, <a href="#Page_513">513-559</a>.</li>

<li class="indx">Electromagnetic field, <a href="#Page_550">550</a>.</li>
<li class="isub1">machines, seen by J. C. M. in 1842,</li>
<li class="isub1"><a href="#Page_52">52.</a></li>
<li class="isub1">theory of light, <a href="#Page_340">340-342</a>.</li>
<li class="isub1">units, <a href="#Page_336">336</a>.</li>

<li class="indx">Ellicott, C. J., Bishop of Gloucester,</li>
<li class="isub1">his correspondence with Maxwell,</li>
<li class="isub1"><a href="#Page_392">392</a>-<a href="#Page_396">396.</a></li>

<li class="indx">Energy, conversion and conservation of,</li>
<li class="isub1"><a href="#Page_335">335</a>, <a href="#Page_438">438</a>.</li>

<li class="indx">Everitt, Professor, member of committee</li>
<li class="isub1">of British Association on Ohm’s Law,</li>
<li class="isub1"><a href="#Page_365">365.</a></li>

<li class="indx">Examination system at Cambridge, <a href="#Page_325">325</a>,</li>
<li class="isub1"><a href="#Page_356">356.</a></li>

<li class="indx">Experimental physics, chair of, <a href="#Page_348">348</a>.</li>
<li class="isub1">inaugural lecture, <a href="#Page_354">354</a>.</li>
<li class="isub1">work of, <a href="#Page_364">364</a> <i>et seq</i>.</li>

<li class="indx">Extension (Spinoza), <a href="#Page_380">380</a>.</li>
<li class="isub1">(Descartes), <a href="#Page_436">436</a>.</li>

<li class="indx">Eye, lecture to operatives on, at Aberdeen,</li>
<li class="isub1"><a href="#Page_264">264.</a></li>


<li class="ifrst"><span class="allsmcap">Faraday, Michael</span>, reference to his</li>
<li class="isub1">experiments upon table-turning,</li>
<li class="isub1"><a href="#Page_189">189.</a></li>
<li class="isub1">Maxwell’s early interest in his investigations,</li>
<li class="isub1"><a href="#Page_199">199</a> <i>note</i>.</li>
<li class="isub1">his lines of force, the subject of a</li>
<li class="isub1">lecture by Maxwell 1855-56,199,</li>
<li class="isub1"><a href="#Page_204">204</a>, <a href="#Page_222">222</a>, <a href="#Page_256">256</a>.</li>
<li class="isub1">his letters to Maxwell, <a href="#Page_288">288</a>, <a href="#Page_519">519</a>.</li>
<li class="isub1">reference to his style, <a href="#Page_305">305</a>.</li>
<li class="isub1">at Maxwell’s lecture Royal Institution</li>
<li class="isub1">(1861), <a href="#Page_319">319</a>, <a href="#Page_528">528</a>.</li>
<li class="isub1">his Electrical Researches carefully</li>
<li class="isub1">studied by Maxwell, <a href="#Page_513">513</a>, <a href="#Page_516">516</a>.</li>
<li class="isub1">his discovery of magnetic induction,</li>
<li class="isub1"><a href="#Page_525">525.</a></li>

<li class="indx">Farrar, Rev. F. W. (Canon of Westminster),</li>
<li class="isub1">a friend of Maxwell as an</li>
<li class="isub1">undergraduate at Cambridge, <a href="#Page_168">168</a>,182,</li>
<li class="isub1"><a href="#Page_200">200.</a></li>

<li class="indx">Fluid displacement, <a href="#Page_346">346</a>.</li>

<li class="indx"><i>Foramen centrale</i>, phenomena of, <a href="#Page_315">315</a>.</li>

<li class="indx">Forbes, Professor James D., his early</li>
<li class="isub1">recognition of J. C. M.’s genius,</li>
<li class="isub1"><a href="#Page_74">74</a>, <a href="#Page_75">75</a>.</li>
<li class="isub1">reads paper of J. C. M. at Royal</li>
<li class="isub1">Society, Edinburgh, <a href="#Page_76">76</a>.</li>
<li class="isub1">his lifelong friendship with J. C.</li>
<li class="isub1">M., <a href="#Page_79">79</a>.</li>
<li class="isub1">his natural philosophy class in the</li>
<li class="isub1">University of Edinburgh, <a href="#Page_90">90</a>,</li>
<li class="isub1"><a href="#Page_114">114</a>, <a href="#Page_115">115</a>, <a href="#Page_116">116</a>, <a href="#Page_124">124</a>, <a href="#Page_127">127</a>.</li>
<li class="isub1">his advice as to Maxwell’s going to</li>
<li class="isub1">Cambridge, <a href="#Page_131">131</a> <i>note</i>, <a href="#Page_132">132</a>.</li>
<li class="isub1">his suggestions as to paper (on</li>
<li class="isub1">elastic solids) for the Royal</li>
<li class="isub1">Society, <a href="#Page_137">137</a>.</li>
<li class="isub1">advises Trinity College, Cambridge,</li>
<li class="isub1"><a href="#Page_146">146.</a></li>
<li class="isub1">correspondence upon colours, <a href="#Page_213">213</a>,</li>
<li class="isub1"><a href="#Page_214">214.</a></li>
<li class="isub1">suggestion as to Aberdeen professorship</li>
<li class="isub1">and joining the Royal</li>
<li class="isub1">Society of Edinburgh, <a href="#Page_250">250</a>.</li>
<li class="isub1">letter upon Maxwell’s appointment</li>
<li class="isub1">and on his father’s death, <a href="#Page_256">256</a>.</li>
<li class="isub1">letter upon professorial work, <a href="#Page_266">266</a>.</li>
<li class="isub1">vacates chair of Natural Philosophy</li>
<li class="isub1">at Edinburgh, <a href="#Page_277">277</a>.</li>
<li class="isub1">letter on Saturn, etc., <a href="#Page_307">307</a>.</li>
<li class="isub1">resignation of principalship, St.</li>
<li class="isub1">Andrews, <a href="#Page_327">327</a>, <a href="#Page_345">345</a>.</li>


<li class="indx">Force, suggestions from Faraday as to</li>
<li class="isub1">definition of, <a href="#Page_289">289</a>.</li>

<li class="indx">Foucault, his pendulum for showing the</li>
<li class="isub1">rotation of the earth, <a href="#Page_153">153</a>.</li>
<li class="isub1">his determination of the velocity of</li>
<li class="isub1">light, <a href="#Page_545">545</a>.</li>

<li class="indx">Fourier’s Theorie de la Chaleur perused</li>
<li class="isub1">by Maxwell while at Edinburgh</li>
<li class="isub1">University, <a href="#Page_133">133</a> <i>note</i>, <a href="#Page_134">134</a>.</li>
<li class="isub1">method of harmonics, <a href="#Page_507">507</a>.</li>

<li class="indx">Fraunhofer’s lines, preparation of water</li>
<li class="isub1">prism for showing, to students, <a href="#Page_267">267</a>.</li>

<li class="indx">Free will, <a href="#Page_305">305</a>, <a href="#Page_306">306</a>.</li>

<li class="indx">Fresnel, <a href="#Page_129">129</a>, <a href="#Page_486">486</a>.</li>

<li class="indx">Frog, a subject of childish interest, <a href="#Page_34">34</a>.</li>
<li class="isub1">transformations ingeniously delineated</li>
<li class="isub1">on magic disc, <a href="#Page_37">37</a>.</li>


<li class="ifrst"><span class="allsmcap">Galileo</span>, <a href="#Page_501">501</a>.</li>

<li class="indx">Galton, F., <a href="#Page_435">435</a>.</li>

<li class="indx">Galvanism (see Electricity).</li>

<li class="indx">Gases, experiments on viscosity of, at</li>
<li class="isub1">different pressures and temperatures,</li>
<li class="isub1"><a href="#Page_318">318.</a></li>
<li class="isub1">paper on this subject, delivered at</li>
<li class="isub1">Bakerian Lecture 1866, <a href="#Page_325">325</a>.</li>

<li class="indx">Geometry, original inquiries suggested</li>
<li class="isub1">to J. C. M. by school exercises in,</li>
<li class="isub1"><a href="#Page_69">69.</a></li>
<li class="isub1">Maxwell’s investigations in, <a href="#Page_465">465</a>,</li>
<li class="isub1"><a href="#Page_496">496</a>-<a href="#Page_498">498.</a></li>

<li class="indx">Germs, speculations upon, <a href="#Page_390">390</a>.</li>

<li class="indx">Glacier-markings on Arthur’s Seat, J.</li>
<li class="isub1">C. M. points out to L. C., in 1846,</li>
<li class="isub1"><a href="#Page_73">73.</a></li>

<li class="indx">Glaciers, Forbes’s investigations on, a</li>
<li class="isub1">subject of interest to J. C. M., <a href="#Page_80">80</a>.</li>

<li class="indx">Glenlair, name of farm acquired by Mr.</li>
<li class="isub1">John C. Maxwell, and house built</li>
<li class="isub1">by him, <a href="#Page_24">24-26</a>.</li>
<li class="isub1">journey from, on J. C. M. going to</li>
<li class="isub1">Edinburgh for schooling, <a href="#Page_46">46</a>.</li>
<li class="isub1">holidays at, <a href="#Page_61">61-65</a>, etc.</li>
<li class="isub1">completion of new offices at, <a href="#Page_64">64</a>.</li>
<li class="isub1">Maxwell’s residence in intervals of</li>
<li class="isub1">professorial work, <a href="#Page_320">320-328</a>.</li>

<li class="indx">Gloag, J. C. M.’s first mathematical</li>
<li class="isub1">teacher, <a href="#Page_68">68</a>.</li>

<li class="indx">Graham’s experiments on gases, <a href="#Page_315">315</a>,</li>
<li class="isub1"><a href="#Page_332">332</a>, <a href="#Page_564">564</a>.</li>

<li class="indx">Gregory, Professor, at Edinburgh, his</li>
<li class="isub1">chemistry class attended by Maxwell,</li>
<li class="isub1"><a href="#Page_107">107</a>, <a href="#Page_114">114</a>, <a href="#Page_126">126</a>, <a href="#Page_127">127</a>.</li>

<li class="indx">Guillemard, Rev. Dr., of Little St.</li>
<li class="isub1">Mary’s,<a id="FNanchor_326" href="#Footnote_326" class="fnanchor">[326]</a> Cambridge, his account of</li>
<li class="isub1">Maxwell’s last hours, <a href="#Page_414">414-416</a>.</li>


<li class="ifrst"><span class="allsmcap">Haidinger’s Brushes</span>, <a href="#Page_84">84</a>, <a href="#Page_489">489</a>.</li>

<li class="indx">Hamilton, Sir William, Edinburgh, his</li>
<li class="isub1">logic and metaphysic class attended</li>
<li class="isub1">by Maxwell, <a href="#Page_90">90</a>, <a href="#Page_107">107</a>, <a href="#Page_116">116</a>,</li>
<li class="isub1"><a href="#Page_126">126.</a></li>
<li class="isub1">influence on Maxwell of his teaching,</li>
<li class="isub1"><a href="#Page_108">108</a>, <a href="#Page_165">165</a>, <a href="#Page_227">227</a>.</li>

<li class="indx">Happy Valley, Vale of Urr, in <i>Coterie-Sprache</i>,</li>
<li class="isub1"><a href="#Page_62">62.</a></li>

<li class="indx">Harmonic analysis, <a href="#Page_374">374</a>.</li>

<li class="indx">Hay, Mr. D. R., his work suggested J.</li>
<li class="isub1">C. M.’s investigations on the subject</li>
<li class="isub1">of ovals, <a href="#Page_73">73</a>.</li>
<li class="isub1">furnishes colour-patterns, <a href="#Page_198">198</a>.</li>
<li class="isub1">his book of colours, <a href="#Page_212">212</a>.</li>

<li class="indx">Heat, a subject in chair of experimental</li>
<li class="isub1">physics, <a href="#Page_350">350</a>.</li>
<li class="isub1">treatise on, <a href="#Page_374">374</a>.</li>

<li class="indx">Helmholtz, his investigations on colours</li>
<li class="isub1">referred to, <a href="#Page_214">214</a>, <a href="#Page_468">468</a>.</li>
<li class="isub1">on conversion of energy, <a href="#Page_335">335</a>.</li>
<li class="isub1">on acoustics, <a href="#Page_363">363</a>.</li>

<li class="indx">Heriot Row, “Old 31,” house of aunt,</li>
<li class="isub1">Mrs. Wedderburn, and home of</li>
<li class="isub1">J. C. M. while at school and</li>
<li class="isub1">college in Edinburgh--arrival</li>
<li class="isub1">there sketched by J. W., <a href="#Page_46">46</a>.</li>
<li class="isub1">home occupations, <a href="#Page_52">52</a>.</li>

<li class="indx">Herschel, Sir John, his essays, <a href="#Page_302">302</a>.</li>
<li class="isub1">his style, <a href="#Page_305">305</a>.</li>
<li class="isub1">Sir William, his observation of</li>
<li class="isub1">Saturn’s rings, <a href="#Page_502">502</a>.</li>

<li class="indx">Hills and Dales, paper on (British</li>
<li class="isub1">Association 1870), <a href="#Page_327">327</a>, <a href="#Page_497">497</a>.</li>

<li class="indx">Hopkins, William, his remark that</li>
<li class="isub1">“Maxwell never made a mistake,”</li>
<li class="isub1"><a href="#Page_133">133</a> <i>note</i>.</li>
<li class="isub1">Maxwell commences to read with</li>
<li class="isub1">him, <a href="#Page_154">154</a>.</li>
<li class="isub1">reminiscence of a fellow-pupil</li>
<li class="isub1">under, <a href="#Page_175">175</a>.</li>

<li class="indx">Hort, Professor F. J. A., his recollections</li>
<li class="isub1">of Maxwell, <a href="#Page_417">417-421</a>.</li>

<li class="indx">Hughes, Professor (microphone), <a href="#Page_363">363</a>.</li>

<li class="indx">Huygens’ discovery of Saturn’s rings,</li>
<li class="isub1"><a href="#Page_501">501.</a></li>


<li class="ifrst"><span class="allsmcap">Impenetrability</span> of matter, doctrine</li>
<li class="isub1">stated in paper on properties of</li>
<li class="isub1">matter, written for Mental Philosophy</li>
<li class="isub1">class in Edinburgh University,</li>
<li class="isub1"><a href="#Page_109">109.</a></li>

<li class="indx">Inertia, as a property of matter, defined</li>
<li class="isub1">in paper written for Mental Philosophy</li>
<li class="isub1">class in University of Edinburgh, <a href="#Page_109">109</a>.</li>

<li class="indx">Investigation, early proclivities for, <a href="#Page_27">27</a>.</li>

<li class="indx">Irving, Miss Janet, paternal grand-mother</li>
<li class="isub1">of J. C. M., <a href="#Page_4">4</a>, <a href="#Page_21">21</a>, <a href="#Page_22">22</a>.</li>


<li class="indx">Irving, John, half-brother to above, and</li>
<li class="isub1">friend of Walter Scott and Lord</li>
<li class="isub1">Eldin, <a href="#Page_21">21</a> and <i>note</i>.</li>

<li class="indx">Italy, tour with Mrs. Maxwell in, <a href="#Page_324">324</a>.</li>


<li class="ifrst"><span class="allsmcap">Jenkin</span>, Professor <span class="allsmcap">Fleeming</span>, associated</li>
<li class="isub1">with Maxwell in committee of</li>
<li class="isub1">British Association, for determining</li>
<li class="isub1">standard of electrical resistance,</li>
<li class="isub1"><a href="#Page_316">316.</a></li>
<li class="isub1">Maxwell’s correspondence with, <a href="#Page_336">336</a>.</li>

<li class="indx">Joule, <a href="#Page_335">335</a>, <a href="#Page_568">568</a>.</li>


<li class="ifrst"><span class="allsmcap">Kelland</span>, Professor, referred to on J.</li>
<li class="isub1">C. M.’s early paper upon ovals,</li>
<li class="isub1">and agreed with Professor</li>
<li class="isub1">Forbes as to its merit, <a href="#Page_75">75</a>.</li>
<li class="isub1">his mathematical classes attended</li>
<li class="isub1">by Maxwell in the University of</li>
<li class="isub1">Edinburgh, <a href="#Page_90">90</a>, <a href="#Page_107">107</a>, <a href="#Page_115">115</a>, <a href="#Page_116">116</a>.</li>
<li class="isub1">reads Maxwell’s paper on rolling</li>
<li class="isub1">curves at meeting of Royal Society,</li>
<li class="isub1">Edinburgh, 19th Feb. 1849, <a href="#Page_106">106</a>.</li>
<li class="isub1">consulted as to choice of college at</li>
<li class="isub1">Cambridge, <a href="#Page_146">146</a>.</li>
<li class="isub1">congratulations on degree, <a href="#Page_207">207</a>.</li>

<li class="indx">Kinetic energy, <a href="#Page_563">563</a>.</li>

<li class="indx">King’s College, London, Maxwell appointed</li>
<li class="isub1">Professor of Natural</li>
<li class="isub1">Philosophy in, <a href="#Page_278">278</a>.</li>
<li class="isub1">his work in this professorship,</li>
<li class="isub1"><a href="#Page_314">314</a>-<a href="#Page_320">320.</a></li>

<li class="indx">Kirchoffs rules for electric circuits,</li>
<li class="isub1"><a href="#Page_372">372</a>, <a href="#Page_399">399</a>.</li>


<li class="ifrst"><span class="allsmcap">Lagrange</span>, <a href="#Page_398">398</a>.</li>

<li class="indx">Laplace, <a href="#Page_398">398</a>, <a href="#Page_438">438</a>, <a href="#Page_505">505</a>.</li>

<li class="indx">Lavater, <a href="#Page_302">302</a>.</li>

<li class="indx">Leaping-pole, <a href="#Page_34">34</a>.</li>

<li class="indx">Le Sage, <a href="#Page_560">560</a>.</li>

<li class="indx">Leibniz, <a href="#Page_335">335</a>, <a href="#Page_398">398</a>.</li>

<li class="indx">Lenz’s law, <a href="#Page_526">526</a>, <a href="#Page_540">540</a>.</li>

<li class="indx">Leverrier, <a href="#Page_85">85</a>, <a href="#Page_351">351</a>.</li>

<li class="indx">Liddell, Elizabeth, maternal grand-mother</li>
<li class="isub1">of J. C. M., <a href="#Page_13">13</a>.</li>

<li class="indx">Light, velocity of, <a href="#Page_317">317</a>, <a href="#Page_329">329</a>, <a href="#Page_483">483</a>.</li>

<li class="indx">Litchfield, R. B., a college friend, correspondence</li>
<li class="isub1">with, <a href="#Page_207">207</a>, <a href="#Page_215">215</a>, <a href="#Page_221">221</a>, <a href="#Page_261">261</a>,</li>
<li class="isub1"><a href="#Page_262">262</a>, <a href="#Page_280">280</a>, <a href="#Page_304">304</a>.</li>

<li class="indx">Lucretius, his argument for a vacuum</li>
<li class="isub1">adopted in a paper of Maxwell’s,</li>
<li class="isub1">written for the mental philosophy</li>
<li class="isub1">class, Edinburgh University, <a href="#Page_109">109</a>, <a href="#Page_112">112</a>.</li>


<li class="ifrst"><span class="allsmcap">Mackenzie, Rev. Charles</span> (afterwards</li>
<li class="isub1">Bishop of Natal), consulted in</li>
<li class="isub1">choice of a college at Cambridge,</li>
<li class="isub1"><a href="#Page_146">146.</a></li>
<li class="isub1">takes J. C. M. and his father to see</li>
<li class="isub1">the colleges, <a href="#Page_148">148</a>.</li>

<li class="indx">Mackenzie, Rev. Charles, a moderator in</li>
<li class="isub1">the examination for the Mathematical</li>
<li class="isub1">Tripos 1854, <a href="#Page_193">193</a>.</li>
<li class="isub1">Colin, a cousin, present at Maxwell’s</li>
<li class="isub1">last illness, <a href="#Page_411">411</a>, <a href="#Page_416">416</a>.</li>
<li class="isub1">Frank, a college friend and contemporary</li>
<li class="isub1">of Maxwell, <a href="#Page_169">169</a>, <a href="#Page_186">186</a>,</li>
<li class="isub1"><a href="#Page_193">193.</a></li>

<li class="indx">Maclagan, W. D. (now Bishop of Lichfield),</li>
<li class="isub1">a friend of Maxwell at Cambridge,</li>
<li class="isub1"><a href="#Page_203">203.</a></li>

<li class="indx">Maclennan, the late J. F., one of Maxwell’s</li>
<li class="isub1">college friends, <a href="#Page_161">161</a>, <a href="#Page_177">177</a>,</li>
<li class="isub1"><a href="#Page_252">252.</a></li>
<li class="isub1">visits Glenlair, <a href="#Page_263">263</a>.</li>

<li class="indx">Magnetism (see Electricity).</li>

<li class="indx">Mathematics, modicum of teaching received</li>
<li class="isub1">at the Edinburgh Academy,</li>
<li class="isub1"><a href="#Page_68">68</a>, <a href="#Page_71">71</a>.</li>
<li class="isub1">Professor Kelland’s classes in University</li>
<li class="isub1">of Edinburgh, <a href="#Page_90">90</a>.</li>

<li class="indx">Matter, properties of, discussed in paper</li>
<li class="isub1">written for Sir W. Hamilton’s</li>
<li class="isub1">class of mental philosophy, <a href="#Page_109">109</a>,</li>
<li class="isub1">and motion, small book on, <a href="#Page_374">374</a>, <a href="#Page_398">398</a>.</li>

<li class="indx">Matteucci, Professor, <a href="#Page_325">325</a>.</li>

<li class="indx">Maurice, Professor, Maxwell’s interest</li>
<li class="isub1">in controversy upon <i>Theological</i></li>
<li class="isub1"><i>Essays</i>, <a href="#Page_171">171</a>, <a href="#Page_192">192</a>, <a href="#Page_194">194</a>.</li>
<li class="isub1">his working-men’s college scheme</li>
<li class="isub1">entered into by Maxwell, <a href="#Page_205">205</a>,</li>
<li class="isub1"><a href="#Page_217">217</a>, <a href="#Page_222">222</a>, <a href="#Page_256">256</a>, <a href="#Page_260">260</a>.</li>
<li class="isub1">criticism of his writings, <a href="#Page_218">218</a>.</li>

<li class="indx">Maxwell, Dorothea Clerk, heiress of</li>
<li class="isub1">Middlebie, great-grandmother</li>
<li class="isub1">(mother of paternal grand-father)</li>
<li class="isub1">of J. C. M., her betrothal and</li>
<li class="isub1">marriage to her cousin George</li>
<li class="isub1">Clerk, <a href="#Page_19">19</a>, <a href="#Page_23">23</a>.</li>

<li class="indx">Sir George Clerk (of Penicuik and</li>
<li class="isub1">Middlebie), great-grandfather, in</li>
<li class="isub1">the direct male line, of J. C. M.,</li>
<li class="isub1"><a href="#Page_19">19</a>, <a href="#Page_23">23</a>.</li>
<li class="isub1"><span class="allsmcap">James Clerk</span>, birth and parentage,</li>
<li class="isub1"><a href="#Page_2">2.</a></li>
<li class="isub1">childhood, <a href="#Page_24">24-44</a>.</li>
<li class="isub1">boyhood--Edinburgh Academy</li>
<li class="isub1">(<i>Æt.</i> 10-13), <a href="#Page_45">45-65</a>.</li>
<li class="isub1">adolescence (<i>Æt.</i> 13-16), <a href="#Page_66">66-90</a>.</li>
<li class="isub1">original work at this period</li>
<li class="isub1">(ovals, etc.), <a href="#Page_91">91-104</a>.</li>
<li class="isub1">University of Edinburgh (<i>Æt.</i></li>
<li class="isub1">16-19), <a href="#Page_105">105-145</a>.</li>
<li class="isub1">undergraduate life at Cambridge</li>
<li class="isub1">(<i>Æt.</i> 19-22), <a href="#Page_146">146-196</a>.</li>
<li class="isub1">Bachelor-scholar and Fellow of</li>
<li class="isub1">Trinity (1854-1856), <a href="#Page_197">197-222</a>.</li>

<li class="indx">Essays at Cambridge, 1853-1856,</li>
<li class="isub1"><a href="#Page_223">223</a>-<a href="#Page_246">246.</a></li>

<li class="indx">Maxwell, James Clerk, his father’s</li>
<li class="isub1">death, professorship at Aberdeen,</li>
<li class="isub1">marriage, <a href="#Page_247">247-313</a>.</li>
<li class="isub1">King’s College, London—Glenlair</li>
<li class="isub1">1860-1870, <a href="#Page_314">314-347</a>.</li>
<li class="isub1">Examiner at Cambridge, <a href="#Page_325">325</a>.</li>
<li class="isub1">Cambridge--Cavendish laboratory</li>
<li class="isub1">(1871-1879), <a href="#Page_348">348-405</a>.</li>
<li class="isub1">illness and death 1879, <a href="#Page_406">406-433</a>.</li>
<li class="isub1">last essays at Cambridge, <a href="#Page_434">434-463</a>.</li>
<li class="isub1">poems, <a href="#Page_577">577-651</a>.</li>
<li class="isub1">John Clerk, father of J. C. M., <a href="#Page_2">2</a>.</li>
<li class="isub1">his place in descent of the</li>
<li class="isub1">Clerks of Penicuik, <a href="#Page_22">22</a>.</li>
<li class="isub1">inherits remnant of Middlebie</li>
<li class="isub1">under an entail which debarred</li>
<li class="isub1">his elder brother</li>
<li class="isub1">George (Clerk) from holding</li>
<li class="isub1">it with Penicuik, <a href="#Page_3">3</a>.</li>
<li class="isub1">converts estate into habitation</li>
<li class="isub1">(Glenlair), <a href="#Page_5">5</a>, <a href="#Page_25">25</a>.</li>
<li class="isub1">inherited and personal traits of</li>
<li class="isub1">character, <a href="#Page_5">5-12</a>.</li>
<li class="isub1">portrait-sketch by J. W., <a href="#Page_38">38</a>.</li>
<li class="isub1">genial intercourse between</li>
<li class="isub1">father and son, <a href="#Page_53">53</a>.</li>
<li class="isub1">interest in son’s progress, <a href="#Page_72">72</a>,</li>
<li class="isub1"><a href="#Page_73">73.</a></li>
<li class="isub1">places son at Cambridge, <a href="#Page_146">146</a>.</li>
<li class="isub1">extracts from his letters to J. C.,</li>
<li class="isub1">M., <a href="#Page_150">150</a>, <a href="#Page_156">156</a>, <a href="#Page_160">160</a>, <a href="#Page_181">181</a>,184-187,</li>
<li class="isub1"><a href="#Page_193">193</a>, <a href="#Page_194">194</a>, <a href="#Page_196">196</a>, <a href="#Page_207">207</a>,</li>
<li class="isub1"><a href="#Page_213">213</a>, <a href="#Page_214">214</a>, <a href="#Page_217">217-220</a>.</li>
<li class="isub1">anxiety about his health, <a href="#Page_206">206</a>,</li>
<li class="isub1"><a href="#Page_210">210.</a></li>
<li class="isub1">his death, <a href="#Page_248">248</a>.</li>
<li class="isub1">Mrs. John Clerk (<i>née</i> Frances Cay),</li>
<li class="isub1">mother of J. C. M., <a href="#Page_2">2</a>.</li>
<li class="isub1">traits of character, <a href="#Page_12">12</a>.</li>
<li class="isub1">her death in J. C. M.’s ninth</li>
<li class="isub1">year, <a href="#Page_15">15</a>.</li>

<li class="indx">Maxwells of Middlebie, note on their</li>
<li class="isub1">descent, <a href="#Page_22">22</a>.</li>

<li class="indx">Meloid, delineation of, <a href="#Page_87">87</a>, <a href="#Page_88">88</a>, <a href="#Page_91">91-97</a>.</li>

<li class="indx">Microphone (Hughes’), <a href="#Page_363">363</a>.</li>

<li class="indx">Middlebie, the family estate descended</li>
<li class="isub1">from the Maxwells, <a href="#Page_3">3</a>.</li>
<li class="isub1">Maxwells of, note on their descent,</li>
<li class="isub1"><a href="#Page_22">22.</a></li>
<li class="isub1">how the bulk of the old estate was</li>
<li class="isub1">disposed of, <a href="#Page_23">23</a>.</li>
<li class="isub1">situation of remaining estate, <a href="#Page_24">24</a>.</li>

<li class="indx">Milton, Maxwell’s early familiarity</li>
<li class="isub1">with, <a href="#Page_32">32</a>.</li>

<li class="indx">Moigno’s <i>Répertoire d'Optique</i>, read</li>
<li class="isub1">during vacation at Edinburgh University,</li>
<li class="isub1"><a href="#Page_129">129.</a></li>

<li class="indx">Molecular physics, account of Maxwell’s</li>
<li class="isub1">investigations in, <a href="#Page_465">465</a>, <a href="#Page_559">559-574</a>.</li>

<li class="indx">Molecules, Maxwell’s discourse on,</li>
<li class="isub1">British Association at Bradford</li>
<li class="isub1">1873, <a href="#Page_358">358-360</a>.</li>
<li class="isub1">his paper on dynamical evidence of</li>
<li class="isub1">the molecular constitution of</li>
<li class="isub1">bodies, <a href="#Page_361">361</a>.</li>
<li class="isub1">his theory of, <a href="#Page_561">561</a>.</li>

<li class="indx">Moral Philosophy, Professor Wilson’s</li>
<li class="isub1">(Christopher North), lectures on,</li>
<li class="isub1"><a href="#Page_107">107</a>, <a href="#Page_114">114</a>, <a href="#Page_127">127</a>, <a href="#Page_128">128</a>.</li>
<li class="isub1">thoughts upon, in correspondence,</li>
<li class="isub1"><a href="#Page_140">140</a>-<a href="#Page_144">144.</a></li>
<li class="isub1">and in an essay, <a href="#Page_234">234</a>.</li>
<li class="isub1">Maxwell’s comments upon Professor</li>
<li class="isub1">Wilson’s lectures, <a href="#Page_145">145</a>.</li>


<li class="ifrst"><span class="allsmcap">Necessity</span>, <a href="#Page_306">306</a> (and see Determinism).</li>

<li class="indx">Neptune, interest in discovery of planet,</li>
<li class="isub1"><a href="#Page_85">85.</a></li>

<li class="indx">Newton, his optics perused by Maxwell</li>
<li class="isub1">while at Edinburgh University,</li>
<li class="isub1"><a href="#Page_133">133</a> <i>note</i>.</li>
<li class="isub1"><i>Principia</i>, etc., referred to, <a href="#Page_398">398</a>,</li>
<li class="isub1"><a href="#Page_437">437.</a></li>
<li class="isub1">class at Aberdeen upon, <a href="#Page_291">291</a>, <a href="#Page_295">295</a>,</li>
<li class="isub1"><a href="#Page_302">302.</a></li>

<li class="indx">Newton’s rings, engaged attention of J.</li>
<li class="isub1">C. M. (<i>Æt.</i> 15), <a href="#Page_84">84</a>.</li>

<li class="indx">Nichol, Professor, his lecture on discovery</li>
<li class="isub1">of planet Neptune, <a href="#Page_85">85</a>.</li>

<li class="indx">Nicol, Mr., inventor of the polariscope</li>
<li class="isub1">visited, <a href="#Page_84">84</a>.</li>
<li class="isub1">letters of J. C. M. referring to this</li>
<li class="isub1">visit, <a href="#Page_122">122</a>, <a href="#Page_123">123</a>.</li>

<li class="indx">Nicol’s prism described, <a href="#Page_486">486</a>.</li>

<li class="indx">Niven, W. D., <a href="#Page_402">402</a>, <a href="#Page_575">575</a>.</li>


<li class="ifrst"><span class="allsmcap">Oërsted</span>, <a href="#Page_305">305</a>, <a href="#Page_521">521</a>.</li>

<li class="indx">Ohm’s Law, <a href="#Page_316">316</a>, <a href="#Page_365">365</a>, <a href="#Page_555">555</a>.</li>

<li class="indx">Ophthalmoscope, instrument made by</li>
<li class="isub1">Maxwell for seeing into the eye,</li>
<li class="isub1"><a href="#Page_198">198</a>, <a href="#Page_208">208</a>.</li>
<li class="isub1">dogs trained to submit to observation</li>
<li class="isub1">by it, <a href="#Page_39">39</a>, <a href="#Page_208">208</a>, <a href="#Page_212">212</a>,</li>
<li class="isub1"><a href="#Page_342">342.</a></li>

<li class="indx">Optics, Maxwell’s contributions to, <a href="#Page_483">483</a>.</li>
<li class="isub1">projected work on, <a href="#Page_204">204</a>.</li>
<li class="isub1">class at Aberdeen on, <a href="#Page_291">291</a>.</li>

<li class="indx">Orr (or Urr), the name of the river by</li>
<li class="isub1">Glenlair, <a href="#Page_24">24</a>.</li>
<li class="isub1">scenery of, <a href="#Page_33">33</a>.</li>
<li class="isub1">spelling of, <a href="#Page_67">67</a>.</li>

<li class="indx">Ovals, investigations on, by J. C. M., as</li>
<li class="isub1">a boy of 14—74, <a href="#Page_75">75</a>, <a href="#Page_76">76</a>, <a href="#Page_88">88</a>, <a href="#Page_91">91</a>,</li>
<li class="isub1"><a href="#Page_98">98</a>-<a href="#Page_104">104.</a></li>
<li class="isub1">identified with those of Descartes,</li>
<li class="isub1">but J. C. M.’s method new and</li>
<li class="isub1">simpler, <a href="#Page_79">79</a>, <a href="#Page_88">88</a>.</li>

<li class="indx">Ovals, delineation and propositions, <a href="#Page_97">97-104</a>.</li>


<li class="ifrst"><span class="allsmcap">Paget</span>, Dr., <a href="#Page_406">406</a>, <a href="#Page_408">408</a>.</li>

<li class="indx">Pain, essay on, <a href="#Page_444">444-452</a>.</li>

<li class="indx">Penicuik, seat of the Clerk family, <a href="#Page_2">2</a>.</li>
<li class="isub1">holiday resort of J. C. M.’s father</li>
<li class="isub1">when a boy, <a href="#Page_7">7</a>.</li>
<li class="isub1">Clerks of, note on their history and</li>
<li class="isub1">descent, <a href="#Page_16">16-22</a>.</li>
<li class="isub1">visited on way from Glenlair on J.</li>
<li class="isub1">C. M. going to Edinburgh for</li>
<li class="isub1">schooling, <a href="#Page_46">46</a>.</li>
<li class="isub1">frequent resort of J. C. M. in</li>
<li class="isub1">Christmas holidays, <a href="#Page_65">65</a>.</li>

<li class="indx">Perception, <a href="#Page_227">227</a>, <a href="#Page_240">240</a>.</li>

<li class="indx">Phonograph, <a href="#Page_403">403</a>, <a href="#Page_455">455</a>.</li>

<li class="indx">Plateau, <a href="#Page_332">332</a>, <a href="#Page_507">507</a>.</li>

<li class="indx">Platometer, <a href="#Page_220">220</a>.</li>

<li class="indx">Poisson, study of his “mechanics,” <a href="#Page_119">119</a>,</li>
<li class="isub1"><a href="#Page_134">134.</a></li>
<li class="isub1">study of his electricity and magnetism,</li>
<li class="isub1"><a href="#Page_217">217.</a></li>

<li class="indx">Polariscope, as constructed by Maxwell,</li>
<li class="isub1"><a href="#Page_487">487.</a></li>

<li class="indx">Polarised light, Maxwell’s early interest</li>
<li class="isub1">in, <a href="#Page_84">84</a>.</li>
<li class="isub1">a subject of study while at Edinburgh</li>
<li class="isub1">University, <a href="#Page_106">106</a>, <a href="#Page_117">117</a>, <a href="#Page_122">122-124</a>,</li>
<li class="isub1"><a href="#Page_126">126.</a></li>
<li class="isub1">theory of rotation of the plane of,</li>
<li class="isub1">by magnetism, <a href="#Page_331">331</a>.</li>

<li class="indx">Pomeroy, a Cambridge friend, <a href="#Page_182">182</a>, <a href="#Page_184">184</a>,</li>
<li class="isub1"><a href="#Page_191">191</a>, <a href="#Page_201">201</a>, <a href="#Page_203">203</a>, <a href="#Page_211">211</a>, <a href="#Page_220">220</a>, <a href="#Page_262">262</a>.</li>
<li class="isub1">nursed in illness by Maxwell, <a href="#Page_206">206</a>,</li>
<li class="isub1"><a href="#Page_221">221.</a></li>
<li class="isub1">his description of his travels, <a href="#Page_266">266</a>.</li>
<li class="isub1">his death in India from fever,</li>
<li class="isub1">brought on by over-exertion</li>
<li class="isub1">(1857), <a href="#Page_274">274</a>.</li>
<li class="isub1">his character reflected by Maxwell’s</li>
<li class="isub1">letters, <a href="#Page_281">281</a>, <a href="#Page_282">282</a>.</li>
<li class="isub1">his own last letter, <a href="#Page_285">285</a>.</li>

<li class="indx">Psychophysik, <a href="#Page_452">452-463</a>.</li>


<li class="ifrst"><span class="allsmcap">Quaternions</span>, <a href="#Page_384">384</a>.</li>


<li class="ifrst"><span class="allsmcap">Ramsay</span>, the late Dean, of Edinburgh,</li>
<li class="isub1">his estimate of young Maxwell, <a href="#Page_163">163</a>.</li>

<li class="indx">Ray Club, Maxwell introduced to, <a href="#Page_213">213</a>.</li>
<li class="isub1">elected an associate of, <a href="#Page_220">220</a>.</li>
<li class="isub1">meetings of, <a href="#Page_249">249</a>.</li>

<li class="indx">Rayleigh, Lord, on Maxwell’s influence</li>
<li class="isub1">at Cambridge, <a href="#Page_357">357</a>.</li>
<li class="isub1">(Hon. J. W. Strutt) on colours, <a href="#Page_376">376</a>,</li>
<li class="isub1"><a href="#Page_380">380.</a></li>
<li class="isub1">letter from, <a href="#Page_349">349</a>.</li>
<li class="isub1">theory of sound, <a href="#Page_363">363</a>.</li>

<li class="indx">Regnault, <a href="#Page_568">568</a>.</li>

<li class="indx">Regular solids constructed by J. C. M.</li>
<li class="isub1">as a boy, <a href="#Page_56">56</a>, <a href="#Page_60">60</a>.</li>

<li class="indx"><i>Religio Medici</i>, Sir Thomas Browne’s, a</li>
<li class="isub1">favourite book with Maxwell, <a href="#Page_173">173</a>,175.</li>

<li class="indx">Religion, Maxwell’s views and sentiments</li>
<li class="isub1">in regard to, <a href="#Page_170">170</a> <i>note</i>, <a href="#Page_321">321</a>,</li>
<li class="isub1"><a href="#Page_323">323</a> <i>note</i>, <a href="#Page_338">338-340</a>.</li>

<li class="indx">Robertson, the Rev. Charles Hope, his</li>
<li class="isub1">reminiscences, <a href="#Page_163">163</a>.</li>

<li class="indx">Rolling curves, a subject of study by</li>
<li class="isub1">Maxwell while at Edinburgh</li>
<li class="isub1">University, <a href="#Page_106">106-121</a>.</li>
<li class="isub1">paper on, read before R.S.E. in</li>
<li class="isub1">1849, <a href="#Page_106">106</a>, <a href="#Page_133">133</a>.</li>

<li class="indx">Routh, fellow-pupil with Maxwell, senior</li>
<li class="isub1">wrangler, and he and Maxwell bracketed</li>
<li class="isub1">Smith’s Prizemen, <a href="#Page_176">176</a>.</li>

<li class="indx">Royal Institution, Maxwell’s lectures on</li>
<li class="isub1">colours at, <a href="#Page_315">315</a>, <a href="#Page_319">319</a>, <a href="#Page_354">354</a>, <a href="#Page_379">379</a>.</li>

<li class="indx">Royal Society of Edinburgh, J. C. M.</li>
<li class="isub1">as a boy, taken by his father to</li>
<li class="isub1">their meetings, <a href="#Page_54">54</a>, <a href="#Page_73">73</a>.</li>
<li class="isub1">paper upon ovals by J. C. M. (<i>Æt.</i></li>
<li class="isub1">14), read at meeting, 6th April</li>
<li class="isub1">1846, <a href="#Page_76">76</a>.</li>
<li class="isub1">paper on rolling curves, at meeting,</li>
<li class="isub1">19th February 1849, <a href="#Page_106">106</a>.</li>
<li class="isub1">paper upon colours (19th March</li>
<li class="isub1">1855), <a href="#Page_469">469</a>.</li>
<li class="isub1">other papers, <a href="#Page_483">483</a>.</li>
<li class="isub1">referred to in correspondence, <a href="#Page_343">343</a>.</li>

<li class="indx">Rowland, Professor, <a href="#Page_373">373</a> <i>note</i>.</li>


<li class="ifrst"><span class="allsmcap">Saturn’s Rings</span>, Maxwell’s work on, for</li>
<li class="isub1">Adams prize, <a href="#Page_275">275</a>, <a href="#Page_291">291</a>, <a href="#Page_293">293</a>, <a href="#Page_295">295</a>, <a href="#Page_303">303</a>.</li>
<li class="isub1">his model of, <a href="#Page_309">309</a>.</li>
<li class="isub1">account of his investigations regarding,</li>
<li class="isub1"><a href="#Page_465">465</a>, <a href="#Page_501">501-513</a>.</li>

<li class="indx">Schuster, his experiments on electrical</li>
<li class="isub1">resistance, <a href="#Page_365">365</a>.</li>

<li class="indx">Scripture, early knowledge of, <a href="#Page_32">32</a>.</li>
<li class="isub1">interpretation of, <a href="#Page_309">309</a>, <a href="#Page_328">328</a>, <a href="#Page_338">338</a>.</li>

<li class="indx">Sea-fyke, an object of boyish interest,</li>
<li class="isub1"><a href="#Page_58">58</a>, <a href="#Page_59">59</a>.</li>

<li class="indx">Smiddy near Glenlair, childish interest</li>
<li class="isub1">in, <a href="#Page_27">27</a>, <a href="#Page_33">33</a>.</li>
<li class="isub1">manufacture of steel bars for magnets,</li>
<li class="isub1">85.</li>

<li class="indx">Smith, Adam, <a href="#Page_143">143</a>, <a href="#Page_234">234</a>.</li>
<li class="isub1">Dr. E., on food, etc., <a href="#Page_335">335</a>.</li>

<li class="indx">Soap-bubbles, objects of youthful</li>
<li class="isub1">interest, <a href="#Page_33">33</a>.</li>

<li class="indx">Society of Arts, Edinburgh, visits to,</li>
<li class="isub1">by J. C. M. with his father, <a href="#Page_73">73</a>.</li>

<li class="indx">Space (of \(m\) dimensions!), <a href="#Page_380">380</a>.</li>

<li class="indx">“Spin,” word used to describe the process</li>
<li class="isub1">in experiments on electrical</li>
<li class="isub1">resistance, <a href="#Page_316">316</a>.</li>

<li class="indx">Spencer, Herbert, social theories criticised,</li>
<li class="isub1"><a href="#Page_459">459.</a></li>

<li class="indx">Spinoza, <a href="#Page_380">380</a>.</li>

<li class="indx">Spiritualism, common-sense views about,</li>
<li class="isub1">humorously expressed, <a href="#Page_228">228-230</a>.</li>

<li class="indx">Stephen, Sir James, his lectures attended</li>
<li class="isub1">by Maxwell, <a href="#Page_185">185</a>.</li>

<li class="indx">Stereoscope, Maxwell’s interest in, <a href="#Page_106">106</a>,</li>
<li class="isub1"><a href="#Page_125">125</a>, <a href="#Page_251">251</a>, <a href="#Page_252">252</a>.</li>
<li class="isub1">his modified form of, <a href="#Page_484">484</a>.</li>

<li class="indx">Stokes, Professor G. G., F.R.S., D.C.L.,</li>
<li class="isub1">commencement of Maxwell’s attendance</li>
<li class="isub1">on his lectures, and lifelong</li>
<li class="isub1">friendship between them,</li>
<li class="isub1"><a href="#Page_154">154</a>, <a href="#Page_185">185</a>.</li>
<li class="isub1">letter to Maxwell on his dynamical</li>
<li class="isub1">top and colour experiments, <a href="#Page_287">287</a>.</li>
<li class="isub1">joins in urging Maxwell to stand</li>
<li class="isub1">for the chair of Experimental</li>
<li class="isub1">Physics at Cambridge, <a href="#Page_349">349</a>.</li>

<li class="indx">Stress, <a href="#Page_493">493</a>, <a href="#Page_573">573</a>.</li>

<li class="indx">Swimming, favourite exercise of J. C.</li>
<li class="isub1">M., <a href="#Page_55">55</a>, <a href="#Page_120">120</a>, <a href="#Page_208">208</a>.</li>

<li class="indx">Sylvester, Professor, <a href="#Page_326">326</a></li>


<li class="ifrst"><span class="allsmcap">Table-turning</span>, reference to Faraday’s</li>
<li class="isub1">experiments on, <a href="#Page_189">189</a>, <a href="#Page_191">191</a>.</li>

<li class="indx">Tadpole, a subject of childish interest,</li>
<li class="isub1"><a href="#Page_34">34.</a></li>
<li class="isub1">transformation of, ingeniously delineated</li>
<li class="isub1">on magic disc, <a href="#Page_37">37</a>.</li>

<li class="indx">Tait, Professor P. G., his summary of</li>
<li class="isub1">reminiscences of Maxwell, <a href="#Page_86">86</a>,</li>
<li class="isub1"><a href="#Page_87">87</a>, <a href="#Page_133">133</a>.</li>
<li class="isub1">his appointment to the Chair of</li>
<li class="isub1">Natural Philosophy in Edinburgh,</li>
<li class="isub1"><a href="#Page_277">277.</a></li>

<li class="indx">Tayler, Rev. C. B., Maxwell’s visit to,</li>
<li class="isub1"><a href="#Page_170">170</a>, <a href="#Page_190">190</a>.</li>
<li class="isub1">correspondence with, <a href="#Page_187">187-189</a>.</li>

<li class="indx">Taylor, Isaac, jun., a fellow-student</li>
<li class="isub1">with Maxwell at Cambridge,</li>
<li class="isub1"><a href="#Page_176">176.</a></li>
<li class="isub1">senior, described, <a href="#Page_177">177</a>.</li>
<li class="isub1">senior, his works referred to, <a href="#Page_227">227</a>.</li>

<li class="indx">Telephone, lecture on, <a href="#Page_361">361</a>, <a href="#Page_403">403</a>.</li>

<li class="indx">Thaumatrope modified, a toy on which</li>
<li class="isub1">early ingenuity was exercised, <a href="#Page_36">36</a>.</li>

<li class="indx">Thomson, Professor (Sir William), asks</li>
<li class="isub1">Maxwell’s assistance in some preparations</li>
<li class="isub1">for meeting of British</li>
<li class="isub1">Association, <a href="#Page_144">144</a>,</li>
<li class="isub1">consulted as to choice of college at</li>
<li class="isub1">Cambridge, <a href="#Page_146">146</a>.</li>
<li class="isub1">his laying of the telegraph cable</li>
<li class="isub1">described by Maxwell in humorous</li>
<li class="isub1">verse, <a href="#Page_279">279</a>.</li>
<li class="isub1">his solution of a problem set by</li>
<li class="isub1">Maxwell, relating to the viscosity</li>
<li class="isub1">of gases, <a href="#Page_341">341</a>.</li>
<li class="isub1">his work in reference to conversion</li>
<li class="isub1">of energy, <a href="#Page_335">335</a>.</li>

<li class="indx">Thomson, Professor, his experiments on</li>
<li class="isub1">air (jointly with Joule), <a href="#Page_568">568</a>.</li>

<li class="indx">Toby (in perpetual succession), a hereditary</li>
<li class="isub1">and lifelong companion,</li>
<li class="isub1"><a href="#Page_38">38</a>, <a href="#Page_369">369</a>.</li>
<li class="isub1">sketched in family groups, <a href="#Page_38">38</a>, <a href="#Page_42">42</a>.</li>
<li class="isub1">at Cambridge, <a href="#Page_369">369</a>, <a href="#Page_370">370</a>.</li>

<li class="indx">Top, colour-, <a href="#Page_198">198</a>, <a href="#Page_332">332</a>, <a href="#Page_469">469</a>.</li>
<li class="isub1">dynamical, Maxwell’s paper on,</li>
<li class="isub1"><a href="#Page_287">287.</a></li>

<li class="indx">Trifocal curves, MS. on (see Ovals),</li>
<li class="isub1"><a href="#Page_87">87.</a></li>

<li class="indx">Tub, early navigation in, <a href="#Page_42">42</a>, <a href="#Page_43">43</a>.</li>
<li class="isub1">venture advanced from duck pond</li>
<li class="isub1">to river, <a href="#Page_62">62</a>, <a href="#Page_63">63</a>.</li>

<li class="indx">Tyndall, Professor, letter from, <a href="#Page_288">288</a>.</li>
<li class="isub1">his address to British Association</li>
<li class="isub1">(Section A), referred to, <a href="#Page_336">336</a>.</li>
<li class="isub1">his address as President of British</li>
<li class="isub1">Association (1874), <a href="#Page_372">372</a>.</li>


<li class="ifrst"><span class="allsmcap">Urr</span> (see Orr).</li>


<li class="ifrst"><span class="allsmcap">Vacuum</span>, arguments of Lucretius for,</li>
<li class="isub1">adopted in paper written for mental</li>
<li class="isub1">philosophy class in Edinburgh University,</li>
<li class="isub1"><a href="#Page_109">109.</a></li>

<li class="indx">Vassals, humorous designation of cottagers</li>
<li class="isub1">on estate, <a href="#Page_39">39</a>.</li>
<li class="isub1">not forgotten amongst scientific</li>
<li class="isub1">work at Cambridge, <a href="#Page_199">199</a>, <a href="#Page_206">206</a>.</li>

<li class="indx">Verdet, <a href="#Page_549">549</a>.</li>

<li class="indx">Verse, exercises in, by J. C. M. as a</li>
<li class="isub1">boy, <a href="#Page_64">64</a>, <a href="#Page_69">69</a>, <a href="#Page_70">70</a>.</li>

<li class="indx">“Virial” of a system, <a href="#Page_567">567</a>.</li>

<li class="indx">Viscosity of gases, experiments on, <a href="#Page_318">318</a>,</li>
<li class="isub1"><a href="#Page_325">325.</a></li>

<li class="indx">Vortices, Maxwell’s theory of, <a href="#Page_329">329</a>.</li>


<li class="ifrst"><span class="allsmcap">Wasps’ nests</span>, youthful adventure in</li>
<li class="isub1">taking, <a href="#Page_33">33</a>.</li>

<li class="indx">Weber, theory of electricity, <a href="#Page_365">365</a>, <a href="#Page_516">516</a>,</li>
<li class="isub1">545, <a href="#Page_550">550</a>.</li>

<li class="indx">Wedderburn, Mrs. (<i>née</i> Isabella Clerk),</li>
<li class="isub1">paternal aunt of J. C. M., <a href="#Page_3">3</a>.</li>
<li class="isub1">a frequent visitor at Glenlair in J.</li>
<li class="isub1">C. M.’s childhood, <a href="#Page_36">36</a>.</li>

<li class="indx">Westcott, Professor, his tribute to Maxwell,</li>
<li class="isub1">358 <i>note</i>.</li>

<li class="indx">Wheatstone’s stereoscope, letter referring</li>
<li class="isub1">to, <a href="#Page_125">125</a>.</li>

<li class="indx">Williams, The Ven. Archdeacon (of</li>
<li class="isub1">Cardigan), Rector of Edinburgh Academy,</li>
<li class="isub1">a genial teacher, <a href="#Page_66">66</a>.</li>

<li class="indx">Willis, Professor, Cambridge, his <i>Principles</i></li>
<li class="isub1"><i>of Mechanism</i>, read by Maxwell</li>
<li class="isub1">during vacation at Edinburgh</li>
<li class="isub1">University, <a href="#Page_129">129</a>, <a href="#Page_133">133</a></li>
<li class="isub1"><i>note</i>.</li>

<li class="indx">Willis, Professor, his lectures on practical</li>
<li class="isub1">mechanism attended by Maxwell</li>
<li class="isub1">when a graduate, <a href="#Page_220">220</a>.</li>

<li class="indx">Wilson, Professor (Christopher North),</li>
<li class="isub1">his Moral Philosophy class</li>
<li class="isub1">attended by Maxwell, <a href="#Page_107">107</a>,</li>
<li class="isub1"><a href="#Page_114">114</a>, <a href="#Page_127">127</a>, <a href="#Page_128">128</a>.</li>
<li class="isub1">Maxwell’s comment on his</li>
<li class="isub1">lectures, <a href="#Page_145">145</a>.</li>

<li class="indx">Dr. George, Maxwell communicates</li>
<li class="isub1">to him results upon colour-blindness, <a href="#Page_203">203</a>, <a href="#Page_217">217</a>.</li>


<li class="ifrst"><span class="allsmcap">Young</span>, Dr. T., his triangle of colours,</li>
<li class="isub1">a basis of Maxwell’s experiments,</li>
<li class="isub1"><a href="#Page_467">467</a>, <a href="#Page_472">472</a>, <a href="#Page_473">473</a>.</li>
<li class="isub1">clearness of his style, <a href="#Page_305">305</a>.</li>

<li class="indx"><span class="allsmcap">Zoëtrope</span>, <a href="#Page_484">484</a>.</li>

</ul>



<div class="footnotes"><h3>FOOTNOTES:</h3>

<div class="footnote">

<p class="nind"><a id="Footnote_326" href="#FNanchor_326" class="label">[326]</a> 
N.B.—<i>not</i> Trinity, as in 413.</p>

</div>
</div>


<p class="nindc space-above2 space-below2">THE END.</p>


<p class="nindc space-above2">
Printed by R. &amp; R. Clark, Edinburgh.</p>


<hr class="chap x-ebookmaker-drop">

<div class="chapter">
<div class="transnote spa1">
<p class="nindc"><b>TRANSCRIBER’S NOTES</b></p>

<p>Simple typographical errors have been silently corrected; unbalanced
quotation marks were remedied when the change was obvious, and
otherwise left unbalanced.</p>

<p>Punctuation, hyphenation, and spelling were made consistent when a
predominant preference was found in the original book; otherwise they
were not changed.</p>

<p>To preserve the integrity of the original text, archaic terminology
across all languages used by the author has been retained.</p>

<p>The manuscripts for the figures on pages 59–61 and 71–74 were
transcribed as accurately as possible by this transcriber.</p>
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