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+This eBook, including all associated images, markup, improvements,
+metadata, and any other content or labor, has been confirmed to be
+in the PUBLIC DOMAIN IN THE UNITED STATES.
+
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+the "Copyright How-To" at https://www.gutenberg.org.
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+Project Gutenberg (https://www.gutenberg.org) public repository for
+eBook #69102 (https://www.gutenberg.org/ebooks/69102)
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-The Project Gutenberg eBook of The Moon, by Oliver Cummings
-Farrington
-
-This eBook is for the use of anyone anywhere in the United States and
-most other parts of the world at no cost and with almost no restrictions
-whatsoever. You may copy it, give it away or re-use it under the terms
-of the Project Gutenberg License included with this eBook or online at
-www.gutenberg.org. If you are not located in the United States, you
-will have to check the laws of the country where you are located before
-using this eBook.
-
-Title: The Moon
-
-Author: Oliver Cummings Farrington
-
-Release Date: October 6, 2022 [eBook #69102]
-
-Language: English
-
-Produced by: Thomas Cosmas compiled from materials made available on The
- Internet Archive and placed in the Public Domain.
-
-*** START OF THE PROJECT GUTENBERG EBOOK THE MOON ***
-
-
-
-
-
-Transcriber Note
-
-Text emphasis is denoted as _Italics_. Whole and fractional parts of
-number as 1234-56/789.
-
-
-
-
- THE MOON
-
- BY
-
- OLIVER C. FARRINGTON
-
- CURATOR OF GEOLOGY
-
-
- [Illustration]
-
-
- GEOLOGY
-
- LEAFLET 6
-
-
- FIELD MUSEUM OF NATURAL HISTORY
-
- CHICAGO
-
- 1925
-
-
-LIST OF GEOLOGICAL LEAFLETS ISSUED TO DATE
-
- No. 1. Model of an Arizona Gold Mine $ .10
-
- No. 2. Models of Blast Furnaces for Smelting Iron .10
-
- No. 3. Amber--Its Physical Properties and Geological Occurrence .10
-
- No. 4. Meteorites .10
-
- No. 5. Soils .10
-
- No. 6. The Moon .10
-
- D. C. DA VIES, DIRECTOR
-
- FIELD MUSEUM OF NATURAL HISTORY
- CHICAGO. U.S.A.
-
-[Illustration: LEAFLET 6. PLATE I.
-
-PHOTOGRAPH OF MODEL IN RELIEF OF THE VISIBLE HEMISPHERE OF THE MOON.
-HALL 35.
-
-The model is 19 feet in diameter.]
-
-
- FIELD MUSEUM OF NATURAL HISTORY
-
- DEPARTMENT OF GEOLOGY
-
- CHICAGO, 1925
-
- ------------------------------------------------------------
- LEAFLET NUMBER 6
- ------------------------------------------------------------
-
- Table of Contents
-
- The Moon 1
- General Observations. 7
- Description of Individual Features. 7
- Sources of Additional Information About the Moon. 13
-
-
-
-
-THE MOON
-
-
-Except for occasional comets and meteors, the Moon is the celestial
-body nearest the Earth. Its mean distance from the Earth is 237,640
-miles, but as it moves in an elliptical orbit, it has at one point
-a remoteness of 253,263 miles and opposite to this one of 221,436
-miles. The diameter of the Moon is about one-fourth that of the Earth,
-or 2,160 miles, and its volume is 1/49 that of the Earth. The mass
-of the Moon (volume multiplied by density) is 1/81 and the density
-⅗ that of the Earth. The period of the Moon's revolution about the
-Earth is 27 days, 7 hours, 43 minutes and 11½ seconds. As its period
-of rotation on its axis is the same, only one side of the Moon is ever
-seen from the Earth. Since, however, the Moon's axis is inclined about
-83° to the plane of its orbit, we sometimes see a little distance
-beyond each of its poles, and, since the rate of motion of the Moon
-in its orbit varies slightly, we sometimes see a little beyond the
-eastern and western edges of the hemisphere. The total result of these
-_librations_, as they are called, is to make four-sevenths of the
-Moon's surface visible to us. Of the remaining three-sevenths, nothing
-is known. So far as is known, the Moon is not flattened at the poles.
-
-Owing to its slow rotation on its axis, the Moon's day has a length of
-29½ of our days. Each portion of its surface is therefore exposed to or
-shielded from the light of the Sun for a fortnight continuously.
-
-The Moon has no atmosphere. Hence, it can have no diffused light, and
-nothing can be seen on it except where the Sun's rays shine directly.
-"If a man stepped into the shadow of a lunar crag," says Todd, "he
-would instantly become invisible. For a similar reason, no sound,
-however loud, can be heard on the Moon. The rolling of a rock down the
-wall of a lunar crater, will be known only by the tremor it produces."
-Moreover, changes of temperature on the Moon are rapid and violent.
-Where the Sun's rays strike, a temperature about that of boiling water
-is believed to be reached, while in unilluminated portions it is
-thought to go as low as 100° below zero.
-
-The force of gravity upon the surface of the Moon is only ⅙ of that on
-the Earth. Therefore, a man weighing 150 pounds on the Earth, would
-weigh only 25 pounds on the Moon, and the same muscular energy by which
-he could jump 6 feet on the Earth would carry him a distance of 36 feet
-on the Moon. On the Earth a body falls 16 feet in one second; on the
-Moon only 2.6 feet in the same time.
-
-The surface of the Moon is made up of mountains, valleys and plains,
-resembling in general appearance those of the Earth. As a whole,
-however, the surface of the Moon is much more uneven than that of the
-Earth. Some of the mountains of the Moon have a height of over 20,000
-feet. As there is no sea-level to measure from, this figure expresses
-height above the surrounding surface, it being determined by the length
-of the shadows cast by the mountains.
-
-In order to represent in a vivid and accurate manner the character and
-appearance of the Moon's surface, the construction of a large model of
-the Moon was undertaken a number of years ago by Th. Dickert, Curator
-of the Natural History Museum of Bonn, Germany and Dr. J. F. Julius
-Schmidt, Director of the Observatory of Athens, Greece and an eminent
-selenographer. The model was presented to the Museum by the late Lewis
-Reese of Chicago, and is installed at the west end of Hall 35 of the
-Museum. The model is 19.2 feet in diameter, and is by far the largest
-and most elaborate representation of the Moon's surface ever made. Its
-horizontal scale is 1:600,000, one inch on the model equaling 9-47/100
-miles on the surface of the Moon, and its vertical scale is 1:200,000,
-one inch equaling 3-15/100 miles on the Moon.
-
-Some characteristic features of the Moon's surface which are especially
-well illustrated on the model are the following:
-
-1. GRAY PLAINS or "SEAS." These are the darker portions of the Moon's
-surface as it is seen with the naked eye. They were thought by earlier
-observers to be seas and were so named. We now know, however, that
-there is no water on the Moon's surface and that the so-called "seas"
-are really low-land plains, some of them of vast extent. The Oceanus
-Procellarum, for instance, covers an area of 90,000 square miles.
-As seen from the Earth, the plains show a gray-green color, often
-of varying intensity and sometimes a little bluish in portions. The
-brightest green color is shown by the area known as Mare Serenitatis.
-Though appearing perfectly level, a close study shows that these plains
-have undulating surfaces. They occupy about one-third of the visible
-surface of the Moon.
-
-2. MOUNTAINS and HIGHLANDS. These constitute the bright portions of the
-Moon's surface as it is seen with the naked eye.
-
-Although these elevated areas are conveniently called mountains, Shaler
-has drawn attention to the fact that they are unlike those on the
-Earth since they lack features due to erosion and there is absence of
-order in their association. The average declivity of their slopes is
-also much greater than that of the mountains on the Earth. It has been
-estimated that the average angle of the lunar surface to its horizon is
-52°, while on the Earth it does not amount to more than one-tenth of
-that figure. This difference is probably due to the lack of water on
-the Moon, the work of which on the Earth tends continually to reduce
-slopes to a level. Using the term mountains for convenience, however,
-those on the Moon may be divided into the following classes:
-
-_a._ MOUNTAIN CHAINS. These may have a length of 80 to 100 miles and
-heights of from 5,000 to 17,000 feet. As in the case with the mountains
-of the Earth, they are usually steeper on one side than on the other.
-The range called the Appenines, seen near the north pole of the Moon,
-is a good illustration of such mountain chains. Other ranges are the
-so-called Alps and Caucasus. These names were applied by Hevelius, an
-astronomer of Danzig, who made the first map of the Moon in 1647. He
-gave to the features of the Moon's surface names of localities similar
-to those on the Earth which they most resembled. His system was largely
-abandoned by later astronomers, however, the later method being to name
-the different features of the Moon after celebrated astronomers and
-philosophers.
-
-_b._ HIGHLANDS SURROUNDED BY MOUNTAINS. These are partly with and
-partly without well-determined directions.
-
-_c._ ISOLATED MOUNTAINS. These usually occur on the gray plains. They
-vary from 4,000 to 7,000 feet in height.
-
-_d._ VEIN MOUNTAINS. These occur only on the gray plains. They are
-long, narrow, contorted ridges, usually from 700 to 1,000 feet in
-height.
-
-_e._ CIRCULAR MOUNTAINS. These are the most characteristic and peculiar
-features of the Moon's surface. They vary in size from the so-called
-"Walled Plains," 150 to 15 miles in diameter, to crater mountains whose
-diameters range from 15 miles down to a few hundred feet. Thirty-three
-thousand of these crater mountains have been counted by one astronomer,
-the number increasing as the size diminishes.
-
-The form of these craters is that of pits, which generally have
-ring-like walls about them. These wails slope very steeply to a central
-cavity and more gently toward the surrounding country. In all these
-pits, as pointed out by Shaler, except those of the smallest size,
-and possibly in these, also, there is, within the ring wall and at a
-considerable though variable depth below its summit, a nearly flat
-floor, which often has a central pit of small size or, in its place,
-a steep cone. When this floor is more than 20 miles in diameter, and
-in increasing numbers as it is wider, there are generally other pits
-and cones irregularly scattered upon it. Thus, within the ring called
-Plato, which is about 60 miles in diameter, there are some scores of
-these lesser pits. On the interior of the ring walls of the pits over
-10 miles in diameter, there are usually more or less distinct terraces,
-which suggest that the material now forming the solid floors they
-inclose was once fluid and stood at greater heights in the pit than
-that at which it became permanently frozen. It is, indeed, tolerably
-certain that the last movement of this material of the floors was one
-of interrupted subsidence from an originally greater elevation on
-the outside of the ring wall. The ring wall is commonly of irregular
-height, with many peaks. In some places there may be seen tongues or
-protrusions of the substance which forms the ring, as if it had flowed
-a short distance and then had cooled with steep slopes. It may also
-be noted: (_a_) that the pits or craters in many instances intersect
-each other, showing that they were not all formed at the same time,
-but in succession; (_b_) that the larger of them are not found on the
-plains (seas) but on the upland and apparently the older parts of the
-surface; and (_c_) that the evidence from the intersections clearly
-indicates that the larger of these structures are prevailingly the
-older and that in general the smallest were the latest formed. In other
-words, says Shaler, whatever was the nature of the action involved in
-the production of the craters, its energy diminished with time, until
-in the end it could no longer break the crust. These features indicate
-that the surface of the Moon has been subject to forces similar to
-those which produce volcanoes on the Earth, and it is therefore
-customary to refer to the crater-like mountains of the Moon as
-volcanoes. As the parallel cannot be drawn too closely, however, Shaler
-has urged that the term vulcanoids, meaning volcano-like, be applied to
-these mountains.
-
-3. RILLS or CLEFTS. These are small, deep, ditch-like furrows to be
-found over various parts of the Moon's surface. Their course seems
-quite independent of the surface topography, for they traverse
-mountains and plains with equal facility. They are without doubt the
-latest formation on the Moon and some of them may have had their origin
-in modern times.
-
-4. BRIGHT STREAKS. These radiate prominently from many of the great
-craters of the Moon. They are streaks of narrow width but sometimes
-nearly a hundred miles in length. They are perhaps the most puzzling
-of all the Moon's features. They have been supposed by some observers
-to represent lava flows whose surface reflected light more brilliantly
-than other portions of the Moon. It is more generally believed,
-however, that the streaks do not represent any independent elevations,
-since they run over the highest mountains as well as through the
-deepest craters without variation.
-
-
-
-
-GENERAL OBSERVATIONS.
-
-
-The condition of the Moon's surface as a whole indicates that it has
-been a theater of extraordinary volcanic activity. In size and number
-its vulcanoids far exceed the volcanoes of the Earth. The largest
-terrestrial crater known is that of Kilauea in the Hawaiian Islands
-which is 2½ miles in diameter. Several craters of the Moon, however,
-exceed 50 miles in diameter and one measures 114¼ miles. While the
-absolute heights of the mountains of the Moon do not greatly exceed
-those of the Earth, proportionally they are much higher, since the
-Moon's diameter is only one-fourth that of the Earth. The vulcanoids
-of the Moon differ in other respects from the volcanoes of our globe.
-"On the Earth they are usually openings on the summits or sides of
-mountains--on the Moon, depressions below the adjacent surface even
-when it is a plain or valley; on the Earth the mass of the cone usually
-far exceeds the capacity of the crater--on the Moon they are much
-nearer equality; on the Earth they are commonly the sources of long
-lava streams--on the Moon, traces of such outpourings are rare." (Webb.)
-
-
-
-
-DESCRIPTION OF INDIVIDUAL FEATURES.
-
-(Abridged from Nasmyth and Carpenter.)
-
-The numbers refer to those on the accompanying chart.
-
-
-COPERNICUS. 147. This may deservedly be considered one of the grandest
-and most instructive of lunar craters. Though its diameter (46 miles)
-is exceeded by that of other craters, its situation near the center
-of the lunar disc renders it so conspicuous as to make it a favorite
-object for observation. Its vast rampart rises to upwards of 12,000
-feet above the level of the plateau, nearly in the center of which
-stands a magnificent group of cones attaining the height of upwards
-of 2400 feet. The rampart is divided by concentric segmented terraced
-ridges, which present every appearance of being enormous landslips,
-resulting from the crushing of their overloaded summits which have
-slid down in vast segments and scattered their debris on the plateau.
-Corresponding vacancies in the rampart may be observed from whence
-these prodigious masses have broken away. The same may be noticed, to
-a somewhat modified degree, around the exterior of the rampart. For
-upwards of 70 miles around Copernicus myriads of comparatively minute
-but perfectly formed craters can be seen. The district on the southeast
-side is especially rich in them. Many somewhat radial ridges or spurs
-may be observed leading away from the exterior banks of the great
-rampart. They appear to be due to the freer egress which the extruded
-matter found near the focus of disruption.
-
-TRIESNECKER. 150. A fine example of a normal lunar volcanic crater
-having all the usual characteristic features in great perfection.
-Its diameter is about 20 miles and it possesses a good example of
-the central cone and also of interior terracing. The most notable
-feature, however, is the remarkable display of cracks or chasms which
-may be seen to the west side of it. Several of these cracks obviously
-diverge from near the west external bank of the great crater and they
-sub-divide or branch out as they extend from the apparent point of
-divergence, while they are crossed or intersected by others. These
-cracks or chasms are nearly one mile wide at their widest part and
-after extending for fully 100 miles taper away till they become
-invisible.
-
-THEOPHILUS. 97. CYRILLUS. 96. CATHARINA. 95. These three magnificent
-craters form a conspicuous group. Their diameters and depths are as
-follows: Theophilus, diameter, 64 miles; depth of interior plateau
-from summit of crater wall, 16,000 feet; central cone, 5200 feet high;
-Cyrillus, diameter, 60 miles; depth of interior plateau from summit
-of crater wall, 15,000 feet; central cone, 5800 feet high; Catharina,
-diameter, 65 miles; depth of interior plateau from summit of crater
-wall, 13,000 feet; center of plateau occupied by a confused group of
-minor craters and debris. Each of these craters is full of interesting
-details presenting in every variety the characteristic features of the
-lunar volcanoes and giving unmistakable evidence of the tremendous
-energy which at some remote period piled up such gigantic formations.
-The intrusion of Theophilus within Cyrillus shows that it is of more
-recent formation than the latter. The flanks of Theophilus, especially
-on the west side, are studded with apparently minute craters. These
-would be considered of great size but for the enormous crater so near.
-
-PTOLEMY. 111. ALPHONS. 110. ARZACHAEL. 84. The portion of the moon's
-surface which includes these features, being near the center of the
-lunar disc, is exceptionally well placed for observation. Within
-this area may be seen every variety of volcanic craters and a number
-of other interesting forms. Ptolemy belongs to the class of walled
-plains, its ramparts enclosing a plain 86 miles in diameter. Alphons
-and Arzachael are respectively 60 and 55 miles in diameter. They have
-all the distinctive features of lunar craters, viz:--central cones,
-lofty, ragged ramparts, manifestations of landslip formations in the
-great segmental terraces within their ramparts and minor craters
-interpolated within their plateaus. A notable object near Alphons is
-an enormous straight cliff traversing the diameter of a low, ridged,
-circular formation. This great cliff is 60 miles long and from 1000 to
-2000 feet high. It is a well known object to lunar observers and has
-been termed "The Railway" on account of its straightness. The existence
-of this remarkable cliff appears to be due either to an upheaval or a
-down-sinking of a portion of the surface of the circular area across
-whose diameter it extends.
-
-TYCHO. 80. This magnificent crater is 54 miles in diameter and upwards
-of 16,000 feet deep from the highest ridge of the rampart to the
-surface of the plateau. It is one of the most conspicuous of lunar
-craters, not so much on account of its dimensions as from its occupying
-the great focus of disruption from whence diverge those remarkable
-bright streaks many of which may be traced over 1000 miles of the
-moon's surface. The interior of the crater presents striking examples
-of the concentric, terrace-like formations that are regarded as formed
-by landslips.
-
-WARGENTIN. 26. SCHICKARD. 28. Wargentin is an object quite unique of
-its kind--a crater about 52 miles across, that to all appearance has
-been filled to the brim with lava that has been left to consolidate.
-There are evidences of the remains of a rampart, especially on the
-southwest portion of the rim. The general aspect of Wargentin has been
-compared to that of a "thin cheese." The terraced and rutted exterior
-of the rampart has all the details of a true crater. The surface of
-the high plateau is marked by a few ridges branching from a point
-nearly in the center.
-
-Schickard is one of the finest examples of a walled plain. It is 153
-miles in diameter. Within its rampart are 16 smaller craters and
-without, numberless others.
-
-The following are the names of topographic features of the Moon which
-can be located by the corresponding numbers on the accompanying chart.
-
- 1. Newton. 59. Pontanus.
- 2. Short. 60. Poisson.
- 3. Simpelius. 61. Aliacensis.
- 4. Manzinus. 62. Werner.
- 5. Moretus. 63. Pitatus.
- 6. Gruemberger. 64. Hesiodus.
- 7. Casatus. 65. Mercator.
- 8. Klaproth. 66. Vitello.
- 9. Wilson. 67. Fourier.
- 10. Kircher. 68. Lagrange.
- 11. Bettinus. 69. Vieta.
- 12. Blancanus. 70. Doppelmayer.
- 13. Clavius. 71. Campanus.
- 14. Scheiner. 72. Kies.
- 15. Zuchius. 73. Purbach.
- 16. Segner. 74. La Caille.
- 17. Bacon. 75. Playfair.
- 18. Nearchus. 76. Azophi.
- 19. Vlacq. 77. Sacrobosco.
- 20. Hommel. 78. Fracastorius.
- 21. Licetus. 79. Santbech.
- 22. Maginus. 80. Petavius.
- 23. Longomontanus. 81. Wilhelm Humboldt.
- 24. Schiller. 82. Polybius.
- 25. Phocylides. 83. Geber.
- 26. Wargentin. 84. Arzachael.
- 27. Inghirami. 85. Thebit.
- 28. Schickard. 86. Bullialdus.
- 29. Wilhelm I. 87. Hippalus.
- 30. Tycho. 88. Cavendish.
- 31. Saussure. 89. Mersenius.
- 32. Stoefler. 90. Gassendi.
- 33. Maurolycus. 91. Lubiniezky.
- 34. Barocius. 92. Alpetragius.
- 35. Fabricius. 93. Airy.
- 36. Metius. 94. Almanon.
- 37. Fernelius. 95. Catharina.
- 38. Heinsius. 96. Cyrillus.
- 39. Hainzel. 97. Theophilus.
- 40. Bouvard. 98. Colombo.
- 41. Piazzi. 99. Vendelinus.
- 42. Ramsden. 100. Langreen.
- 43. Capuanus. 101. Goclenius.
- 44. Cichus. 102. Guttemberg.
- 45. Wurzelbauer. 103. Isidorus.
- 46. Gauricus. 104. Capella.
- 47. Hell. 105. Kant.
- 48. Walter. 106. Descartes.
- 49. Nonius. 107. Abulfeda.
- 50. Riccius. 108. Parrot.
- 51. Rheita. 109. Albategnius.
- 52. Furnerius. 110. Alphons.
- 53. Stevinus. 111. Ptolemy.
- 54. Hase. 112. Herschel.
- 55. Snell. 113. Davy.
- 56. Borda. 114. Guerike.
- 57. Neander. 116. Bonpland.
- 58. Piccolomini.
-
- 117. Lalande. 174. Seleucus.
- 118. Reaumur. 175. Herodotus.
- 120. Letronne. 176. Aristarchus.
- 121. Billy. 177. La Hire.
- 122. Fontana. 178. Pytheas.
- 123. Hansteen. 179. Bessel.
- 124. Damoiseau. 180. Vitruvius.
- 125. Grimaldi. 181. Maraldi.
- 126. Flamsteed. 182. Macrobius.
- 127. Landsberg. 183. Cleomides.
- 128. Moesting. 184. Roemer.
- 129. Deambrel. 185. Littrow.
- 130. Taylor. 186. Posidonius.
- 131. Messier. 187. Geminus.
- 132. Maskelyne. 188. Linnaeus.
- 133. Sabine. 189. Autolycus.
- 134. Ritter. 190. Aristillus.
- 135. Godin. 191. Archimedes.
- 136. Soemmering. 192. Timocharis.
- 137. Schroeter. 193. Lambert.
- 138. Gambart. 194. Diophantus.
- 139. Reinhold. 195. Delisle.
- 140. Encke. 196. Briggs.
- 141. Hevelius. 197. Lichtenberg.
- 142. Riccioli. 199. Calippus.
- 143. Lohrman. 200. Cassini.
- 144. Cavalerius. 201. Gauss.
- 145. Reiner. 202. Messala.
- 146. Kepler. 203. Struve.
- 147. Copernicus. 204. Mason.
- 148. Stadius. 205. Plana.
- 149. Pallas. 206. Burg.
- 150. Triesnecker. 207. Baily.
- 151. Agrippa. 208. Eudoxus.
- 152. Arago. 209. Aristotle.
- 153. Taruntius. 210. Plato.
- 154. Apollonius. 211. Pico.
- 155. Schubert. 212. Helicon.
- 156. Firmicus. 213. Maupertuis.
- 157. Silberschlag. 214. Condamine.
- 158. Hyginus. 215. Bianchini.
- 159. Ukert. 216. Sharp.
- 160. Boscovich. 217. Mairan.
- 161. Ross. 218. Gerard.
- 162. Proclus. 219. Repsold.
- 163. Picard. 220. Pythagoras.
- 164. Condorcet. 221. Fontenelle.
- 165. Pliny or Menelaus. 222. Timaeus.
- 167. Manilius. 223. Epigenes.
- 168. Erastothenes. 224. Gartner.
- 169. Gay Lussac. 225. Thales.
- 170. Tobias Mayer. 226. Strabo.
- 171. Marius. 227. Endymion.
- 172. Olbers. 228. Atlas.
- 173. Vasco de Gama. 229. Hercules.
-
-
- OLIVER C. FARRINGTON.
-
-
-
-
-SOURCES OF ADDITIONAL INFORMATION ABOUT THE MOON
-
-
-A number of textbooks and popular works on astronomy deal more or less
-fully with the Moon. Among them the following may be mentioned.
-
- MOULTON, FOREST RAY--Introduction to Astronomy. Macmillan
- & Co., New York. 1916. 577 pp.
-
- YOUNG, CHARLES A.--A Textbook of General Astronomy. Ginn
- & Co., Boston. 1898. 630 pp.
-
- TODD, DAVID P.--Stars and Telescopes. Little, Brown & Co.,
- Boston. 1899. 419 pp.
-
-The following are some works which treat exclusively of the Moon.
-
- NASMYTH, JAMES and CARPENTER, JAMES--The Moon. John
- Murray, London. 1885. 213 pp. 25 "Woodburytype"
- plates and several text figures.
-
- PICKERING, WILLIAM H.--The Moon. Doubleday, Page & Co.,
- New York. 1903. Quarto. 103 pp. and many full-sized
- plates.
-
- PROCTOR, RICHARD A.--The Moon. Longmans, Green & Co.,
- London. 1898. 314 pp.
-
- GILBERT, GROVE K.--The Moon's Face. Bulletin of the Philosophical
- Society of Washington, 1892-93. Vol. 12, pp.
- 241-292.
-
- SHALER, NATHANIEL S.--A Comparison of the Features of the
- Earth and the Moon. Smithsonian Contributions to Knowledge.
- 1907. Vol. 34, pp. 1-79. 25 plates.
-
-
-[Illustration: LEAFLET 6. PLATE II.
-
-CHART OF THE MOON'S SURFACE. AFTER NASMYTH.
-
-The figures refer to the names given on pp. 11 and 12 and the use of
-the chart with the model will enable the reader to name the different
-features of the moon.]
-
-
-PRINTED BY FIELD MUSEUM PRESS
-
-
- * * * * *
-
-
-Transcriber Note
-
-The list of "topographic features" (pp. 11-12) have some numbers
-missing (115, 116) and a comparison with Nasmyth and Carpenter's The
-Moon was missing those numbers but several other numbers were repeated.
-The repeated numbers appear to represent craters too close to split out.
-
-
-
-
-*** END OF THE PROJECT GUTENBERG EBOOK THE MOON ***
-
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-be renamed.
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-<p style='text-align:center; font-size:1.2em; font-weight:bold'>The Project Gutenberg eBook of The Moon, by Oliver Cummings Farrington</p>
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-<p style='display:block; margin-top:1em; margin-bottom:1em; margin-left:2em; text-indent:-2em'>Title: The Moon</p>
-<p style='display:block; margin-top:1em; margin-bottom:0; margin-left:2em; text-indent:-2em'>Author: Oliver Cummings Farrington</p>
-<p style='display:block; text-indent:0; margin:1em 0'>Release Date: October 6, 2022 [eBook #69102]</p>
-<p style='display:block; text-indent:0; margin:1em 0'>Language: English</p>
- <p style='display:block; margin-top:1em; margin-bottom:0; margin-left:2em; text-indent:-2em; text-align:left'>Produced by: Thomas Cosmas compiled from materials made available on The Internet Archive and placed in the Public Domain.</p>
-<div style='margin-top:2em; margin-bottom:4em'>*** START OF THE PROJECT GUTENBERG EBOOK THE MOON ***</div>
-
-
-
-
-<div class="figcenter" id="cover" style="width: 256px;">
- <img src="images/cover.png" width="256" height="422" alt="" />
-</div>
-
-
-
-<p><span class="pagenum" id="Cover2"></span></p>
-
-<h1>THE MOON</h1>
-
-<p class="tdc">BY</p>
-
-<h2>OLIVER C. FARRINGTON</h2>
-
-<p class="pmb2 tdc"><span class="smcap">Curator of Geology</span></p>
-
-
-<div class="figcenter" id="logo" style="width: 201px;">
- <img src="images/logo.png" width="201" height="122" alt="" />
-</div>
-
-
-<p class="pmt4 tdc"><span class="smcap">Geology</span></p>
-
-<p class="pmb4 tdc"><span class="smcap">Leaflet 6</span></p>
-
-
-<p class="tdc">FIELD MUSEUM OF NATURAL HISTORY</p>
-
-<p class="tdc">CHICAGO</p>
-
-<p class="pmb4 tdc">1925</p>
-
-
-<p><span class="pagenum" id="Cover3"></span></p>
-
-
-<p class="caption3">LIST OF GEOLOGICAL LEAFLETS ISSUED TO DATE</p>
-
-<div style="width: 44em; margin: 2em auto;">
-<table style="width: 40em;">
-<tr>
- <td class="tdr">No. 1.</td>
- <td class="tdl">Model of an Arizona Gold Mine</td>
- <td class="tdr">$ .10</td>
-</tr>
-<tr>
- <td class="tdr">No. 2.</td>
- <td class="tdl">Models of Blast Furnaces for Smelting Iron</td>
- <td class="tdr">.10</td>
-</tr>
-<tr>
- <td class="tdr">No. 3.</td>
- <td class="tdl">Amber—Its Physical Properties and Geological Occurrence</td>
- <td class="tdr">.10</td>
-</tr>
-<tr>
- <td class="tdr">No. 4.</td>
- <td class="tdl">Meteorites</td>
- <td class="tdr">.10</td>
-</tr>
-<tr>
- <td class="tdr">No. 5.</td>
- <td class="tdl">Soils</td>
- <td class="tdr">.10</td>
-</tr>
-<tr>
- <td class="tdr">No. 6.</td>
- <td class="tdl">The Moon</td>
- <td class="tdr">.10</td>
-</tr>
-</table>
-
-<p class="tdr">D. C. DA VIES, <span class="smcap">Director</span></p>
-
-<p>FIELD MUSEUM OF NATURAL HISTORY<br />
-&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;CHICAGO. U.S.A.</p>
-</div>
-
-<p><span class="pagenum" id="Plate_I"></span></p>
-
-
-
-<table id="plate1" style="width:90%; margin: 4em auto;">
-<tr>
- <td class="tdl smcap">Leaflet 6</td>
- <td class="tdc"><div style="width:300px">&#160;</div></td>
- <td class="tdr smcap">PLATE I</td>
-</tr>
-<tr>
- <td class="tdc" colspan="3">
- <a href="images/plate1_lg.png"><img src="images/plate1.png" width="636" height="545" alt="" /></a><br />
- <span class="smaller">Click on image to view larger sized</span>
- </td>
-</tr>
-<tr>
- <td colspan="3"><p class="tdc">PHOTOGRAPH OF MODEL IN RELIEF OF THE VISIBLE HEMISPHERE OF THE MOON. HALL 35.</p>
- <p class="tdc">The model is 19 feet in diameter.</p>
- </td>
-</tr>
-</table>
-
-
-
-
-<p><span class="pagenum" id="Page_1">- 1 -</span></p>
-
-
-<p class="pmt2 caption2"><span class="smcap">Field Museum of Natural History</span></p>
-
-<p class="caption3">DEPARTMENT OF GEOLOGY</p>
-
-<p class="pmb4 tdc"><span class="smcap">Chicago, 1925</span></p>
-
-
-
-<table style="width:80%; margin: 2em auto;">
-<tr>
- <td class="bdt bdb tdl smcap">Leaflet</td>
- <td class="bdt bdb" style="width:75%">&#160;</td>
- <td class="bdt bdb tdr smcap">Number&#160;6</td>
-</tr>
-</table>
-
-
-
-
-<p class="caption3nb">Table of Contents</p>
-
-<table class="tblcont">
-<tr>
- <td class="tdl smcap">The Moon</td>
- <td class="tdr"><a href="#THE_MOON">1</a></td>
-</tr>
-<tr>
- <td class="tdl smcap">General Observations.</td>
- <td class="tdr"><a href="#GENERAL_OBSERVATIONS">7</a></td>
-</tr>
-<tr>
- <td class="tdl smcap">Description of Individual Features.</td>
- <td class="tdr"><a href="#DESCRIPTION_OF_INDIVIDUAL_FEATURES">7</a></td>
-</tr>
-<tr>
- <td class="tdl smcap">Sources of Additional Information About the Moon.</td>
- <td class="tdr"><a href="#SOURCES_OF_ADDITIONAL_INFORMATION_ABOUT_THE_MOON">13</a></td>
-</tr>
-</table>
-
-
-
-<h1 id="THE_MOON">THE MOON</h1>
-
-
-<p>Except for occasional comets and meteors, the
-Moon is the celestial body nearest the Earth. Its mean
-distance from the Earth is 237,640 miles, but as it
-moves in an elliptical orbit, it has at one point a
-remoteness of 253,263 miles and opposite to this
-one of 221,436 miles. The diameter of the Moon is
-about one-fourth that of the Earth, or 2,160 miles,
-and its volume is <sup>1</sup>/<sub>49</sub> that of the Earth. The mass of
-the Moon (volume multiplied by density) is <sup>1</sup>/<sub>81</sub> and
-the density ⅗ that of the Earth. The period of the
-Moon's revolution about the Earth is 27 days, 7 hours,
-43 minutes and 11½ seconds. As its period of rotation
-on its axis is the same, only one side of the Moon
-is ever seen from the Earth. Since, however, the
-Moon's axis is inclined about 83° to the plane of its
-orbit, we sometimes see a little distance beyond each
-of its poles, and, since the rate of motion of the Moon
-in its orbit varies slightly, we sometimes see a little
-beyond the eastern and western edges of the hemisphere.
-The total result of these <i>librations</i>, as they
-are called, is to make four-sevenths of the Moon's surface
-visible to us. Of the remaining three-sevenths,
-nothing is known. So far as is known, the Moon is
-not flattened at the poles.</p>
-
-<p>Owing to its slow rotation on its axis, the Moon's
-day has a length of 29½ of our days. Each portion
-of its surface is therefore exposed to or shielded from
-the light of the Sun for a fortnight continuously.</p>
-
-<p><span class="pagenum" id="Page_2">- 2 -</span></p>
-
-<p>The Moon has no atmosphere. Hence, it can have
-no diffused light, and nothing can be seen on it except
-where the Sun's rays shine directly. "If a man stepped
-into the shadow of a lunar crag," says Todd, "he would
-instantly become invisible. For a similar reason, no
-sound, however loud, can be heard on the Moon. The
-rolling of a rock down the wall of a lunar crater, will
-be known only by the tremor it produces." Moreover,
-changes of temperature on the Moon are rapid and
-violent. Where the Sun's rays strike, a temperature
-about that of boiling water is believed to be reached,
-while in unilluminated portions it is thought to go as
-low as 100° below zero.</p>
-
-<p>The force of gravity upon the surface of the Moon
-is only ⅙ of that on the Earth. Therefore, a man
-weighing 150 pounds on the Earth, would weigh only
-25 pounds on the Moon, and the same muscular energy
-by which he could jump 6 feet on the Earth would
-carry him a distance of 36 feet on the Moon. On the
-Earth a body falls 16 feet in one second; on the Moon
-only 2.6 feet in the same time.</p>
-
-<p>The surface of the Moon is made up of mountains,
-valleys and plains, resembling in general appearance
-those of the Earth. As a whole, however, the surface
-of the Moon is much more uneven than that of the
-Earth. Some of the mountains of the Moon have a
-height of over 20,000 feet. As there is no sea-level to
-measure from, this figure expresses height above the
-surrounding surface, it being determined by the length
-of the shadows cast by the mountains.</p>
-
-<p>In order to represent in a vivid and accurate
-manner the character and appearance of the Moon's
-surface, the construction of a large model of the Moon
-was undertaken a number of years ago by Th. Dickert,
-Curator of the Natural History Museum of Bonn, Germany
-and Dr. J. F. Julius Schmidt, Director of the
-Observatory of Athens, Greece and an eminent selenographer.
-<span class="pagenum" id="Page_3">- 3 -</span>
-The model was presented to the Museum
-by the late Lewis Reese of Chicago, and is installed at
-the west end of Hall 35 of the Museum. The model is
-19.2 feet in diameter, and is by far the largest and
-most elaborate representation of the Moon's surface
-ever made. Its horizontal scale is 1:600,000, one inch
-on the model equaling 9<sup>47</sup>/<sub>100</sub> miles on the surface of
-the Moon, and its vertical scale is 1:200,000, one inch
-equaling 3<sup>15</sup>/<sub>100</sub> miles on the Moon.</p>
-
-<p>Some characteristic features of the Moon's surface
-which are especially well illustrated on the model
-are the following:</p>
-
-<p>1. GRAY PLAINS or "SEAS." These are the
-darker portions of the Moon's surface as it is seen
-with the naked eye. They were thought by earlier
-observers to be seas and were so named. We now
-know, however, that there is no water on the Moon's
-surface and that the so-called "seas" are really low-land
-plains, some of them of vast extent. The Oceanus
-Procellarum, for instance, covers an area of 90,000
-square miles. As seen from the Earth, the plains
-show a gray-green color, often of varying intensity
-and sometimes a little bluish in portions. The brightest
-green color is shown by the area known as Mare
-Serenitatis. Though appearing perfectly level, a close
-study shows that these plains have undulating surfaces.
-They occupy about one-third of the visible surface
-of the Moon.</p>
-
-<p>2. MOUNTAINS and HIGHLANDS. These constitute
-the bright portions of the Moon's surface as
-it is seen with the naked eye.</p>
-
-<p>Although these elevated areas are conveniently
-called mountains, Shaler has drawn attention to the
-fact that they are unlike those on the Earth since
-<span class="pagenum" id="Page_4">- 4 -</span>
-they lack features due to erosion and there is absence
-of order in their association. The average declivity of
-their slopes is also much greater than that of the
-mountains on the Earth. It has been estimated that
-the average angle of the lunar surface to its horizon
-is 52°, while on the Earth it does not amount to more
-than one-tenth of that figure. This difference is probably
-due to the lack of water on the Moon, the work
-of which on the Earth tends continually to reduce
-slopes to a level. Using the term mountains for convenience,
-however, those on the Moon may be divided
-into the following classes:</p>
-
-<p><i>a.</i> <span class="smcap">Mountain Chains.</span> These may have a length
-of 80 to 100 miles and heights of from 5,000 to 17,000
-feet. As in the case with the mountains of the Earth,
-they are usually steeper on one side than on the other.
-The range called the Appenines, seen near the north
-pole of the Moon, is a good illustration of such mountain
-chains. Other ranges are the so-called Alps and
-Caucasus. These names were applied by Hevelius, an
-astronomer of Danzig, who made the first map of the
-Moon in 1647. He gave to the features of the Moon's
-surface names of localities similar to those on the
-Earth which they most resembled. His system was
-largely abandoned by later astronomers, however, the
-later method being to name the different features of
-the Moon after celebrated astronomers and philosophers.</p>
-
-<p><i>b.</i> <span class="smcap">Highlands Surrounded By Mountains.</span> These are
-partly with and partly without well-determined directions.</p>
-
-<p><i>c.</i> <span class="smcap">Isolated Mountains.</span> These usually occur on
-the gray plains. They vary from 4,000 to 7,000 feet
-in height.</p>
-
-<p><span class="pagenum" id="Page_5">- 5 -</span></p>
-
-<p><i>d.</i> <span class="smcap">Vein Mountains.</span> These occur only on the gray
-plains. They are long, narrow, contorted ridges, usually
-from 700 to 1,000 feet in height.</p>
-
-<p><i>e.</i> <span class="smcap">Circular Mountains.</span> These are the most characteristic
-and peculiar features of the Moon's surface.
-They vary in size from the so-called "Walled
-Plains," 150 to 15 miles in diameter, to crater mountains
-whose diameters range from 15 miles down to a
-few hundred feet. Thirty-three thousand of these
-crater mountains have been counted by one astronomer,
-the number increasing as the size diminishes.</p>
-
-<p>The form of these craters is that of pits, which
-generally have ring-like walls about them. These
-wails slope very steeply to a central cavity and more
-gently toward the surrounding country. In all these
-pits, as pointed out by Shaler, except those of the
-smallest size, and possibly in these, also, there is, within
-the ring wall and at a considerable though variable
-depth below its summit, a nearly flat floor, which often
-has a central pit of small size or, in its place, a
-steep cone. When this floor is more than 20 miles
-in diameter, and in increasing numbers as it is wider,
-there are generally other pits and cones irregularly
-scattered upon it. Thus, within the ring called Plato,
-which is about 60 miles in diameter, there are some
-scores of these lesser pits. On the interior of the
-ring walls of the pits over 10 miles in diameter, there
-are usually more or less distinct terraces, which suggest
-that the material now forming the solid floors
-they inclose was once fluid and stood at greater heights
-in the pit than that at which it became permanently
-frozen. It is, indeed, tolerably certain that the last
-movement of this material of the floors was one of
-interrupted subsidence from an originally greater
-elevation on the outside of the ring wall. The ring
-wall is commonly of irregular height, with many peaks.
-<span class="pagenum" id="Page_6">- 6 -</span>
-In some places there may be seen tongues or protrusions
-of the substance which forms the ring, as if it
-had flowed a short distance and then had cooled with
-steep slopes. It may also be noted: (<i>a</i>) that the pits
-or craters in many instances intersect each other,
-showing that they were not all formed at the same
-time, but in succession; (<i>b</i>) that the larger of them
-are not found on the plains (seas) but on the upland
-and apparently the older parts of the surface; and
-(<i>c</i>) that the evidence from the intersections clearly
-indicates that the larger of these structures are prevailingly
-the older and that in general the smallest
-were the latest formed. In other words, says Shaler,
-whatever was the nature of the action involved in
-the production of the craters, its energy diminished
-with time, until in the end it could no longer break the
-crust. These features indicate that the surface of
-the Moon has been subject to forces similar to those
-which produce volcanoes on the Earth, and it is therefore
-customary to refer to the crater-like mountains
-of the Moon as volcanoes. As the parallel cannot be
-drawn too closely, however, Shaler has urged that the
-term vulcanoids, meaning volcano-like, be applied to
-these mountains.</p>
-
-<p>3. RILLS or CLEFTS. These are small, deep,
-ditch-like furrows to be found over various parts of
-the Moon's surface. Their course seems quite independent
-of the surface topography, for they traverse
-mountains and plains with equal facility. They are
-without doubt the latest formation on the Moon and
-some of them may have had their origin in modern
-times.</p>
-
-<p>4. BRIGHT STREAKS. These radiate prominently
-from many of the great craters of the Moon.
-They are streaks of narrow width but sometimes
-nearly a hundred miles in length. They are perhaps
-<span class="pagenum" id="Page_7">- 7 -</span>
-the most puzzling of all the Moon's features. They
-have been supposed by some observers to represent
-lava flows whose surface reflected light more brilliantly
-than other portions of the Moon. It is more generally
-believed, however, that the streaks do not represent
-any independent elevations, since they run over the
-highest mountains as well as through the deepest
-craters without variation.</p>
-
-
-<hr class="chap x-ebookmaker-drop" />
-
-<div class="chapter">
-<h2 class="nobreak" id="GENERAL_OBSERVATIONS">GENERAL OBSERVATIONS.</h2>
-</div>
-
-
-<p>The condition of the Moon's surface as a whole
-indicates that it has been a theater of extraordinary
-volcanic activity. In size and number its vulcanoids
-far exceed the volcanoes of the Earth. The largest
-terrestrial crater known is that of Kilauea in the
-Hawaiian Islands which is 2½ miles in diameter.
-Several craters of the Moon, however, exceed 50 miles
-in diameter and one measures 114¼ miles. While the
-absolute heights of the mountains of the Moon do not
-greatly exceed those of the Earth, proportionally they
-are much higher, since the Moon's diameter is only
-one-fourth that of the Earth. The vulcanoids of the
-Moon differ in other respects from the volcanoes of
-our globe. "On the Earth they are usually openings
-on the summits or sides of mountains—on the Moon,
-depressions below the adjacent surface even when it
-is a plain or valley; on the Earth the mass of the
-cone usually far exceeds the capacity of the crater —
-on the Moon they are much nearer equality; on the
-Earth they are commonly the sources of long lava
-streams—on the Moon, traces of such outpourings are
-rare." (Webb.)</p>
-
-
-<hr class="chap x-ebookmaker-drop" />
-
-<div class="chapter">
-<h2 class="nobreak" id="DESCRIPTION_OF_INDIVIDUAL_FEATURES">DESCRIPTION OF INDIVIDUAL FEATURES.</h2>
-</div>
-
-
-<p class="tdc">(Abridged from Nasmyth and Carpenter.)</p>
-
-<p class="tdc">The numbers refer to those on the accompanying
-chart.</p>
-
-<p><span class="pagenum" id="Page_8">- 8 -</span></p>
-
-<p><span class="smcap">Copernicus.</span> 147. This may deservedly be considered
-one of the grandest and most instructive of
-lunar craters. Though its diameter (46 miles) is exceeded
-by that of other craters, its situation near
-the center of the lunar disc renders it so conspicuous
-as to make it a favorite object for observation. Its
-vast rampart rises to upwards of 12,000 feet above
-the level of the plateau, nearly in the center of which
-stands a magnificent group of cones attaining the
-height of upwards of 2400 feet. The rampart is divided
-by concentric segmented terraced ridges, which
-present every appearance of being enormous landslips,
-resulting from the crushing of their overloaded summits
-which have slid down in vast segments and
-scattered their debris on the plateau. Corresponding
-vacancies in the rampart may be observed from whence
-these prodigious masses have broken away. The same
-may be noticed, to a somewhat modified degree, around
-the exterior of the rampart. For upwards of 70 miles
-around Copernicus myriads of comparatively minute
-but perfectly formed craters can be seen. The district
-on the southeast side is especially rich in them. Many
-somewhat radial ridges or spurs may be observed leading
-away from the exterior banks of the great rampart.
-They appear to be due to the freer egress which the
-extruded matter found near the focus of disruption.</p>
-
-<p><span class="smcap">Triesnecker.</span> 150. A fine example of a normal
-lunar volcanic crater having all the usual characteristic
-features in great perfection. Its diameter is
-about 20 miles and it possesses a good example of the
-central cone and also of interior terracing. The most
-notable feature, however, is the remarkable display
-of cracks or chasms which may be seen to the west
-side of it. Several of these cracks obviously diverge
-from near the west external bank of the great crater
-and they sub-divide or branch out as they extend
-<span class="pagenum" id="Page_9">- 9 -</span>
-from the apparent point of divergence, while they are
-crossed or intersected by others. These cracks or
-chasms are nearly one mile wide at their widest part
-and after extending for fully 100 miles taper away
-till they become invisible.</p>
-
-<p><span class="smcap">Theophilus.</span> 97. <span class="smcap">Cyrillus.</span> 96. <span class="smcap">Catharina.</span> 95.
-These three magnificent craters form a conspicuous
-group. Their diameters and depths are as follows:
-Theophilus, diameter, 64 miles; depth of interior
-plateau from summit of crater wall, 16,000 feet;
-central cone, 5200 feet high; Cyrillus, diameter, 60
-miles; depth of interior plateau from summit of
-crater wall, 15,000 feet; central cone, 5800 feet high;
-Catharina, diameter, 65 miles; depth of interior plateau
-from summit of crater wall, 13,000 feet; center
-of plateau occupied by a confused group of minor craters
-and debris. Each of these craters is full of interesting
-details presenting in every variety the characteristic
-features of the lunar volcanoes and giving
-unmistakable evidence of the tremendous energy
-which at some remote period piled up such gigantic
-formations. The intrusion of Theophilus within Cyrillus
-shows that it is of more recent formation than
-the latter. The flanks of Theophilus, especially on the
-west side, are studded with apparently minute craters.
-These would be considered of great size but for the
-enormous crater so near.</p>
-
-<p><span class="smcap">Ptolemy.</span> 111. <span class="smcap">Alphons.</span> 110. <span class="smcap">Arzachael.</span> 84. The
-portion of the moon's surface which includes these
-features, being near the center of the lunar disc, is
-exceptionally well placed for observation. Within this
-area may be seen every variety of volcanic craters
-and a number of other interesting forms. Ptolemy
-belongs to the class of walled plains, its ramparts enclosing
-a plain 86 miles in diameter. Alphons and
-<span class="pagenum" id="Page_10">- 10 -</span>
-Arzachael are respectively 60 and 55 miles in diameter.
-They have all the distinctive features of lunar craters,
-viz:—central cones, lofty, ragged ramparts, manifestations
-of landslip formations in the great segmental
-terraces within their ramparts and minor craters interpolated
-within their plateaus. A notable object
-near Alphons is an enormous straight cliff traversing
-the diameter of a low, ridged, circular formation. This
-great cliff is 60 miles long and from 1000 to 2000
-feet high. It is a well known object to lunar observers
-and has been termed "The Railway" on account of
-its straightness. The existence of this remarkable
-cliff appears to be due either to an upheaval or a down-sinking
-of a portion of the surface of the circular area
-across whose diameter it extends.</p>
-
-<p><span class="smcap">Tycho.</span> 80. This magnificent crater is 54 miles in
-diameter and upwards of 16,000 feet deep from the
-highest ridge of the rampart to the surface of the
-plateau. It is one of the most conspicuous of lunar
-craters, not so much on account of its dimensions as
-from its occupying the great focus of disruption from
-whence diverge those remarkable bright streaks many
-of which may be traced over 1000 miles of the moon's
-surface. The interior of the crater presents striking
-examples of the concentric, terrace-like formations
-that are regarded as formed by landslips.</p>
-
-<p><span class="smcap">Wargentin.</span> 26. <span class="smcap">Schickard</span>. 28. Wargentin is an
-object quite unique of its kind—a crater about 52
-miles across, that to all appearance has been filled
-to the brim with lava that has been left to consolidate.
-There are evidences of the remains of a
-rampart, especially on the southwest portion of the
-rim. The general aspect of Wargentin has been compared
-to that of a "thin cheese." The terraced and
-rutted exterior of the rampart has all the details of a
-<span class="pagenum" id="Page_11">- 11 -</span>
-true crater. The surface of the high plateau is marked
-by a few ridges branching from a point nearly in the
-center.</p>
-
-<p>Schickard is one of the finest examples of a walled
-plain. It is 153 miles in diameter. Within its rampart
-are 16 smaller craters and without, numberless
-others.</p>
-
-<p>The following are the names of topographic features
-of the Moon which can be located by the corresponding
-numbers on the accompanying chart.</p>
-
-<table style="width: 35em;">
-<tr>
- <td>
-<table style="width: 22em;">
-<tr>
- <td class="tdr">1.</td>
- <td class="tdl">Newton.</td>
-</tr>
-<tr>
- <td class="tdr">2.</td>
- <td class="tdl">Short.</td>
-</tr>
-<tr>
- <td class="tdr">3.</td>
- <td class="tdl">Simpelius.</td>
-</tr>
-<tr>
- <td class="tdr">4.</td>
- <td class="tdl">Manzinus.</td>
-</tr>
-<tr>
- <td class="tdr">5.</td>
- <td class="tdl">Moretus.</td>
-</tr>
-<tr>
- <td class="tdr">6.</td>
- <td class="tdl">Gruemberger.</td>
-</tr>
-<tr>
- <td class="tdr">7.</td>
- <td class="tdl">Casatus.</td>
-</tr>
-<tr>
- <td class="tdr">8.</td>
- <td class="tdl">Klaproth.</td>
-</tr>
-<tr>
- <td class="tdr">9.</td>
- <td class="tdl">Wilson.</td>
-</tr>
-<tr>
- <td class="tdr">10.</td>
- <td class="tdl">Kircher.</td>
-</tr>
-<tr>
- <td class="tdr">11.</td>
- <td class="tdl">Bettinus.</td>
-</tr>
-<tr>
- <td class="tdr">12.</td>
- <td class="tdl">Blancanus.</td>
-</tr>
-<tr>
- <td class="tdr">13.</td>
- <td class="tdl">Clavius.</td>
-</tr>
-<tr>
- <td class="tdr">14.</td>
- <td class="tdl">Scheiner.</td>
-</tr>
-<tr>
- <td class="tdr">15.</td>
- <td class="tdl">Zuchius.</td>
-</tr>
-<tr>
- <td class="tdr">16.</td>
- <td class="tdl">Segner.</td>
-</tr>
-<tr>
- <td class="tdr">17.</td>
- <td class="tdl">Bacon.</td>
-</tr>
-<tr>
- <td class="tdr">18.</td>
- <td class="tdl">Nearchus.</td>
-</tr>
-<tr>
- <td class="tdr">19.</td>
- <td class="tdl">Vlacq.</td>
-</tr>
-<tr>
- <td class="tdr">20.</td>
- <td class="tdl">Hommel.</td>
-</tr>
-<tr>
- <td class="tdr">21.</td>
- <td class="tdl">Licetus.</td>
-</tr>
-<tr>
- <td class="tdr">22.</td>
- <td class="tdl">Maginus.</td>
-</tr>
-<tr>
- <td class="tdr">23.</td>
- <td class="tdl">Longomontanus.</td>
-</tr>
-<tr>
- <td class="tdr">24.</td>
- <td class="tdl">Schiller.</td>
-</tr>
-<tr>
- <td class="tdr">25.</td>
- <td class="tdl">Phocylides.</td>
-</tr>
-<tr>
- <td class="tdr">26.</td>
- <td class="tdl">Wargentin.</td>
-</tr>
-<tr>
- <td class="tdr">27.</td>
- <td class="tdl">Inghirami.</td>
-</tr>
-<tr>
- <td class="tdr">28.</td>
- <td class="tdl">Schickard.</td>
-</tr>
-<tr>
- <td class="tdr">29.</td>
- <td class="tdl">Wilhelm I.</td>
-</tr>
-<tr>
- <td class="tdr">30.</td>
- <td class="tdl">Tycho.</td>
-</tr>
-<tr>
- <td class="tdr">31.</td>
- <td class="tdl">Saussure.</td>
-</tr>
-<tr>
- <td class="tdr">32.</td>
- <td class="tdl">Stoefler.</td>
-</tr>
-<tr>
- <td class="tdr">33.</td>
- <td class="tdl">Maurolycus.</td>
-</tr>
-<tr>
- <td class="tdr">34.</td>
- <td class="tdl">Barocius.</td>
-</tr>
-<tr>
- <td class="tdr">35.</td>
- <td class="tdl">Fabricius.</td>
-</tr>
-<tr>
- <td class="tdr">36.</td>
- <td class="tdl">Metius.</td>
-</tr>
-<tr>
- <td class="tdr">37.</td>
- <td class="tdl">Fernelius.</td>
-</tr>
-<tr>
- <td class="tdr">38.</td>
- <td class="tdl">Heinsius.</td>
-</tr>
-<tr>
- <td class="tdr">39.</td>
- <td class="tdl">Hainzel.</td>
-</tr>
-<tr>
- <td class="tdr">40.</td>
- <td class="tdl">Bouvard.</td>
-</tr>
-<tr>
- <td class="tdr">41.</td>
- <td class="tdl">Piazzi.</td>
-</tr>
-<tr>
- <td class="tdr">42.</td>
- <td class="tdl">Ramsden.</td>
-</tr>
-<tr>
- <td class="tdr">43.</td>
- <td class="tdl">Capuanus.</td>
-</tr>
-<tr>
- <td class="tdr">44.</td>
- <td class="tdl">Cichus.</td>
-</tr>
-<tr>
- <td class="tdr">45.</td>
- <td class="tdl">Wurzelbauer.</td>
-</tr>
-<tr>
- <td class="tdr">46.</td>
- <td class="tdl">Gauricus.</td>
-</tr>
-<tr>
- <td class="tdr">47.</td>
- <td class="tdl">Hell.</td>
-</tr>
-<tr>
- <td class="tdr">48.</td>
- <td class="tdl">Walter.</td>
-</tr>
-<tr>
- <td class="tdr">49.</td>
- <td class="tdl">Nonius.</td>
-</tr>
-<tr>
- <td class="tdr">50.</td>
- <td class="tdl">Riccius.</td>
-</tr>
-<tr>
- <td class="tdr">51.</td>
- <td class="tdl">Rheita.</td>
-</tr>
-<tr>
- <td class="tdr">52.</td>
- <td class="tdl">Furnerius.</td>
-</tr>
-<tr>
- <td class="tdr">53.</td>
- <td class="tdl">Stevinus.</td>
-</tr>
-<tr>
- <td class="tdr">54.</td>
- <td class="tdl">Hase.</td>
-</tr>
-<tr>
- <td class="tdr">55.</td>
- <td class="tdl">Snell.</td>
-</tr>
-<tr>
- <td class="tdr">56.</td>
- <td class="tdl">Borda.</td>
-</tr>
-<tr>
- <td class="tdr">57.</td>
- <td class="tdl">Neander.</td>
-</tr>
-<tr>
- <td class="tdr">58.</td>
- <td class="tdl">Piccolomini.</td>
-</tr>
-<tr>
- <td colspan="2">&#160;&#160;&#160;&#160;</td>
-</tr>
-<tr>
- <td class="tdr">117.</td>
- <td class="tdl">Lalande.<span class="pagenum" id="Page_12">- 12 -</span></td>
-</tr>
-<tr>
- <td class="tdr">118.</td>
- <td class="tdl">Reaumur.</td>
-</tr>
-<tr>
- <td class="tdr">120.</td>
- <td class="tdl">Letronne.</td>
-</tr>
-<tr>
- <td class="tdr">121.</td>
- <td class="tdl">Billy.</td>
-</tr>
-<tr>
- <td class="tdr">122.</td>
- <td class="tdl">Fontana.</td>
-</tr>
-<tr>
- <td class="tdr">123.</td>
- <td class="tdl">Hansteen.</td>
-</tr>
-<tr>
- <td class="tdr">124.</td>
- <td class="tdl">Damoiseau.</td>
-</tr>
-<tr>
- <td class="tdr">125.</td>
- <td class="tdl">Grimaldi.</td>
-</tr>
-<tr>
- <td class="tdr">126.</td>
- <td class="tdl">Flamsteed.</td>
-</tr>
-<tr>
- <td class="tdr">127.</td>
- <td class="tdl">Landsberg.</td>
-</tr>
-<tr>
- <td class="tdr">128.</td>
- <td class="tdl">Moesting.</td>
-</tr>
-<tr>
- <td class="tdr">129.</td>
- <td class="tdl">Deambrel.</td>
-</tr>
-<tr>
- <td class="tdr">130.</td>
- <td class="tdl">Taylor.</td>
-</tr>
-<tr>
- <td class="tdr">131.</td>
- <td class="tdl">Messier.</td>
-</tr>
-<tr>
- <td class="tdr">132.</td>
- <td class="tdl">Maskelyne.</td>
-</tr>
-<tr>
- <td class="tdr">133.</td>
- <td class="tdl">Sabine.</td>
-</tr>
-<tr>
- <td class="tdr">134.</td>
- <td class="tdl">Ritter.</td>
-</tr>
-<tr>
- <td class="tdr">135.</td>
- <td class="tdl">Godin.</td>
-</tr>
-<tr>
- <td class="tdr">136.</td>
- <td class="tdl">Soemmering.</td>
-</tr>
-<tr>
- <td class="tdr">137.</td>
- <td class="tdl">Schroeter.</td>
-</tr>
-<tr>
- <td class="tdr">138.</td>
- <td class="tdl">Gambart.</td>
-</tr>
-<tr>
- <td class="tdr">139.</td>
- <td class="tdl">Reinhold.</td>
-</tr>
-<tr>
- <td class="tdr">140.</td>
- <td class="tdl">Encke.</td>
-</tr>
-<tr>
- <td class="tdr">141.</td>
- <td class="tdl">Hevelius.</td>
-</tr>
-<tr>
- <td class="tdr">142.</td>
- <td class="tdl">Riccioli.</td>
-</tr>
-<tr>
- <td class="tdr">143.</td>
- <td class="tdl">Lohrman.</td>
-</tr>
-<tr>
- <td class="tdr">144.</td>
- <td class="tdl">Cavalerius.</td>
-</tr>
-<tr>
- <td class="tdr">145.</td>
- <td class="tdl">Reiner.</td>
-</tr>
-<tr>
- <td class="tdr">146.</td>
- <td class="tdl">Kepler.</td>
-</tr>
-<tr>
- <td class="tdr">147.</td>
- <td class="tdl">Copernicus.</td>
-</tr>
-<tr>
- <td class="tdr">148.</td>
- <td class="tdl">Stadius.</td>
-</tr>
-<tr>
- <td class="tdr">149.</td>
- <td class="tdl">Pallas.</td>
-</tr>
-<tr>
- <td class="tdr">150.</td>
- <td class="tdl">Triesnecker.</td>
-</tr>
-<tr>
- <td class="tdr">151.</td>
- <td class="tdl">Agrippa.</td>
-</tr>
-<tr>
- <td class="tdr">152.</td>
- <td class="tdl">Arago.</td>
-</tr>
-<tr>
- <td class="tdr">153.</td>
- <td class="tdl">Taruntius.</td>
-</tr>
-<tr>
- <td class="tdr">154.</td>
- <td class="tdl">Apollonius.</td>
-</tr>
-<tr>
- <td class="tdr">155.</td>
- <td class="tdl">Schubert.</td>
-</tr>
-<tr>
- <td class="tdr">156.</td>
- <td class="tdl">Firmicus.</td>
-</tr>
-<tr>
- <td class="tdr">157.</td>
- <td class="tdl">Silberschlag.</td>
-</tr>
-<tr>
- <td class="tdr">158.</td>
- <td class="tdl">Hyginus.</td>
-</tr>
-<tr>
- <td class="tdr">159.</td>
- <td class="tdl">Ukert.</td>
-</tr>
-<tr>
- <td class="tdr">160.</td>
- <td class="tdl">Boscovich.</td>
-</tr>
-<tr>
- <td class="tdr">161.</td>
- <td class="tdl">Ross.</td>
-</tr>
-<tr>
- <td class="tdr">162.</td>
- <td class="tdl">Proclus.</td>
-</tr>
-<tr>
- <td class="tdr">163.</td>
- <td class="tdl">Picard.</td>
-</tr>
-<tr>
- <td class="tdr">164.</td>
- <td class="tdl">Condorcet.</td>
-</tr>
-<tr>
- <td class="tdr">165.</td>
- <td class="tdl">Pliny or Menelaus.</td>
-</tr>
-<tr>
- <td class="tdr">167.</td>
- <td class="tdl">Manilius.</td>
-</tr>
-<tr>
- <td class="tdr">168.</td>
- <td class="tdl">Erastothenes.</td>
-</tr>
-<tr>
- <td class="tdr">169.</td>
- <td class="tdl">Gay Lussac.</td>
-</tr>
-<tr>
- <td class="tdr">170.</td>
- <td class="tdl">Tobias Mayer.</td>
-</tr>
-<tr>
- <td class="tdr">171.</td>
- <td class="tdl">Marius.</td>
-</tr>
-<tr>
- <td class="tdr">172.</td>
- <td class="tdl">Olbers.</td>
-</tr>
-<tr>
- <td class="tdr">173.</td>
- <td class="tdl">Vasco de Gama.</td>
-</tr>
-</table>
- </td>
- <td>
-<table>
-<tr>
- <td class="tdr">59.</td>
- <td class="tdl">Pontanus.</td>
-</tr>
-<tr>
- <td class="tdr">60.</td>
- <td class="tdl">Poisson.</td>
-</tr>
-<tr>
- <td class="tdr">61.</td>
- <td class="tdl">Aliacensis.</td>
-</tr>
-<tr>
- <td class="tdr">62.</td>
- <td class="tdl">Werner.</td>
-</tr>
-<tr>
- <td class="tdr">63.</td>
- <td class="tdl">Pitatus.</td>
-</tr>
-<tr>
- <td class="tdr">64.</td>
- <td class="tdl">Hesiodus.</td>
-</tr>
-<tr>
- <td class="tdr">65.</td>
- <td class="tdl">Mercator.</td>
-</tr>
-<tr>
- <td class="tdr">66.</td>
- <td class="tdl">Vitello.</td>
-</tr>
-<tr>
- <td class="tdr">67.</td>
- <td class="tdl">Fourier.</td>
-</tr>
-<tr>
- <td class="tdr">68.</td>
- <td class="tdl">Lagrange.</td>
-</tr>
-<tr>
- <td class="tdr">69.</td>
- <td class="tdl">Vieta.</td>
-</tr>
-<tr>
- <td class="tdr">70.</td>
- <td class="tdl">Doppelmayer.</td>
-</tr>
-<tr>
- <td class="tdr">71.</td>
- <td class="tdl">Campanus.</td>
-</tr>
-<tr>
- <td class="tdr">72.</td>
- <td class="tdl">Kies.</td>
-</tr>
-<tr>
- <td class="tdr">73.</td>
- <td class="tdl">Purbach.</td>
-</tr>
-<tr>
- <td class="tdr">74.</td>
- <td class="tdl">La Caille.</td>
-</tr>
-<tr>
- <td class="tdr">75.</td>
- <td class="tdl">Playfair.</td>
-</tr>
-<tr>
- <td class="tdr">76.</td>
- <td class="tdl">Azophi.</td>
-</tr>
-<tr>
- <td class="tdr">77.</td>
- <td class="tdl">Sacrobosco.</td>
-</tr>
-<tr>
- <td class="tdr">78.</td>
- <td class="tdl">Fracastorius.</td>
-</tr>
-<tr>
- <td class="tdr">79.</td>
- <td class="tdl">Santbech.</td>
-</tr>
-<tr>
- <td class="tdr">80.</td>
- <td class="tdl">Petavius.</td>
-</tr>
-<tr>
- <td class="tdr">81.</td>
- <td class="tdl">Wilhelm Humboldt.</td>
-</tr>
-<tr>
- <td class="tdr">82.</td>
- <td class="tdl">Polybius.</td>
-</tr>
-<tr>
- <td class="tdr">83.</td>
- <td class="tdl">Geber.</td>
-</tr>
-<tr>
- <td class="tdr">84.</td>
- <td class="tdl">Arzachael.</td>
-</tr>
-<tr>
- <td class="tdr">85.</td>
- <td class="tdl">Thebit.</td>
-</tr>
-<tr>
- <td class="tdr">86.</td>
- <td class="tdl">Bullialdus.</td>
-</tr>
-<tr>
- <td class="tdr">87.</td>
- <td class="tdl">Hippalus.</td>
-</tr>
-<tr>
- <td class="tdr">88.</td>
- <td class="tdl">Cavendish.</td>
-</tr>
-<tr>
- <td class="tdr">89.</td>
- <td class="tdl">Mersenius.</td>
-</tr>
-<tr>
- <td class="tdr">90.</td>
- <td class="tdl">Gassendi.</td>
-</tr>
-<tr>
- <td class="tdr">91.</td>
- <td class="tdl">Lubiniezky.</td>
-</tr>
-<tr>
- <td class="tdr">92.</td>
- <td class="tdl">Alpetragius.</td>
-</tr>
-<tr>
- <td class="tdr">93.</td>
- <td class="tdl">Airy.</td>
-</tr>
-<tr>
- <td class="tdr">94.</td>
- <td class="tdl">Almanon.</td>
-</tr>
-<tr>
- <td class="tdr">95.</td>
- <td class="tdl">Catharina.</td>
-</tr>
-<tr>
- <td class="tdr">96.</td>
- <td class="tdl">Cyrillus.</td>
-</tr>
-<tr>
- <td class="tdr">97.</td>
- <td class="tdl">Theophilus.</td>
-</tr>
-<tr>
- <td class="tdr">98.</td>
- <td class="tdl">Colombo.</td>
-</tr>
-<tr>
- <td class="tdr">99.</td>
- <td class="tdl">Vendelinus.</td>
-</tr>
-<tr>
- <td class="tdr">100.</td>
- <td class="tdl">Langreen.</td>
-</tr>
-<tr>
- <td class="tdr">101.</td>
- <td class="tdl">Goclenius.</td>
-</tr>
-<tr>
- <td class="tdr">102.</td>
- <td class="tdl">Guttemberg.</td>
-</tr>
-<tr>
- <td class="tdr">103.</td>
- <td class="tdl">Isidorus.</td>
-</tr>
-<tr>
- <td class="tdr">104.</td>
- <td class="tdl">Capella.</td>
-</tr>
-<tr>
- <td class="tdr">105.</td>
- <td class="tdl">Kant.</td>
-</tr>
-<tr>
- <td class="tdr">106.</td>
- <td class="tdl">Descartes.</td>
-</tr>
-<tr>
- <td class="tdr">107.</td>
- <td class="tdl">Abulfeda.</td>
-</tr>
-<tr>
- <td class="tdr">108.</td>
- <td class="tdl">Parrot.</td>
-</tr>
-<tr>
- <td class="tdr">109.</td>
- <td class="tdl">Albategnius.</td>
-</tr>
-<tr>
- <td class="tdr">110.</td>
- <td class="tdl">Alphons.</td>
-</tr>
-<tr>
- <td class="tdr">111.</td>
- <td class="tdl">Ptolemy.</td>
-</tr>
-<tr>
- <td class="tdr">112.</td>
- <td class="tdl">Herschel.</td>
-</tr>
-<tr>
- <td class="tdr">113.</td>
- <td class="tdl">Davy.</td>
-</tr>
-<tr>
- <td class="tdr">114.</td>
- <td class="tdl">Guerike.</td>
-</tr>
-<tr>
- <td class="tdr">116.</td>
- <td class="tdl">Bonpland.</td>
-</tr>
-<tr>
- <td colspan="2">&#160;&#160;&#160;&#160;</td>
-</tr>
-<tr>
- <td class="tdr">174.</td>
- <td class="tdl">Seleucus.</td>
-</tr>
-<tr>
- <td class="tdr">175.</td>
- <td class="tdl">Herodotus.</td>
-</tr>
-<tr>
- <td class="tdr">176.</td>
- <td class="tdl">Aristarchus.</td>
-</tr>
-<tr>
- <td class="tdr">177.</td>
- <td class="tdl">La Hire.</td>
-</tr>
-<tr>
- <td class="tdr">178.</td>
- <td class="tdl">Pytheas.</td>
-</tr>
-<tr>
- <td class="tdr">179.</td>
- <td class="tdl">Bessel.</td>
-</tr>
-<tr>
- <td class="tdr">180.</td>
- <td class="tdl">Vitruvius.</td>
-</tr>
-<tr>
- <td class="tdr">181.</td>
- <td class="tdl">Maraldi.</td>
-</tr>
-<tr>
- <td class="tdr">182.</td>
- <td class="tdl">Macrobius.</td>
-</tr>
-<tr>
- <td class="tdr">183.</td>
- <td class="tdl">Cleomides.</td>
-</tr>
-<tr>
- <td class="tdr">184.</td>
- <td class="tdl">Roemer.</td>
-</tr>
-<tr>
- <td class="tdr">185.</td>
- <td class="tdl">Littrow.</td>
-</tr>
-<tr>
- <td class="tdr">186.</td>
- <td class="tdl">Posidonius.</td>
-</tr>
-<tr>
- <td class="tdr">187.</td>
- <td class="tdl">Geminus.</td>
-</tr>
-<tr>
- <td class="tdr">188.</td>
- <td class="tdl">Linnaeus.</td>
-</tr>
-<tr>
- <td class="tdr">189.</td>
- <td class="tdl">Autolycus.</td>
-</tr>
-<tr>
- <td class="tdr">190.</td>
- <td class="tdl">Aristillus.</td>
-</tr>
-<tr>
- <td class="tdr">191.</td>
- <td class="tdl">Archimedes.</td>
-</tr>
-<tr>
- <td class="tdr">192.</td>
- <td class="tdl">Timocharis.</td>
-</tr>
-<tr>
- <td class="tdr">193.</td>
- <td class="tdl">Lambert.</td>
-</tr>
-<tr>
- <td class="tdr">194.</td>
- <td class="tdl">Diophantus.</td>
-</tr>
-<tr>
- <td class="tdr">195.</td>
- <td class="tdl">Delisle.</td>
-</tr>
-<tr>
- <td class="tdr">196.</td>
- <td class="tdl">Briggs.</td>
-</tr>
-<tr>
- <td class="tdr">197.</td>
- <td class="tdl">Lichtenberg.</td>
-</tr>
-<tr>
- <td class="tdr">199.</td>
- <td class="tdl">Calippus.</td>
-</tr>
-<tr>
- <td class="tdr">200.</td>
- <td class="tdl">Cassini.</td>
-</tr>
-<tr>
- <td class="tdr">201.</td>
- <td class="tdl">Gauss.</td>
-</tr>
-<tr>
- <td class="tdr">202.</td>
- <td class="tdl">Messala.</td>
-</tr>
-<tr>
- <td class="tdr">203.</td>
- <td class="tdl">Struve.</td>
-</tr>
-<tr>
- <td class="tdr">204.</td>
- <td class="tdl">Mason.</td>
-</tr>
-<tr>
- <td class="tdr">205.</td>
- <td class="tdl">Plana.</td>
-</tr>
-<tr>
- <td class="tdr">206.</td>
- <td class="tdl">Burg.</td>
-</tr>
-<tr>
- <td class="tdr">207.</td>
- <td class="tdl">Baily.</td>
-</tr>
-<tr>
- <td class="tdr">208.</td>
- <td class="tdl">Eudoxus.</td>
-</tr>
-<tr>
- <td class="tdr">209.</td>
- <td class="tdl">Aristotle.</td>
-</tr>
-<tr>
- <td class="tdr">210.</td>
- <td class="tdl">Plato.</td>
-</tr>
-<tr>
- <td class="tdr">211.</td>
- <td class="tdl">Pico.</td>
-</tr>
-<tr>
- <td class="tdr">212.</td>
- <td class="tdl">Helicon.</td>
-</tr>
-<tr>
- <td class="tdr">213.</td>
- <td class="tdl">Maupertuis.</td>
-</tr>
-<tr>
- <td class="tdr">214.</td>
- <td class="tdl">Condamine.</td>
-</tr>
-<tr>
- <td class="tdr">215.</td>
- <td class="tdl">Bianchini.</td>
-</tr>
-<tr>
- <td class="tdr">216.</td>
- <td class="tdl">Sharp.</td>
-</tr>
-<tr>
- <td class="tdr">217.</td>
- <td class="tdl">Mairan.</td>
-</tr>
-<tr>
- <td class="tdr">218.</td>
- <td class="tdl">Gerard.</td>
-</tr>
-<tr>
- <td class="tdr">219.</td>
- <td class="tdl">Repsold.</td>
-</tr>
-<tr>
- <td class="tdr">220.</td>
- <td class="tdl">Pythagoras.</td>
-</tr>
-<tr>
- <td class="tdr">221.</td>
- <td class="tdl">Fontenelle.</td>
-</tr>
-<tr>
- <td class="tdr">222.</td>
- <td class="tdl">Timaeus.</td>
-</tr>
-<tr>
- <td class="tdr">223.</td>
- <td class="tdl">Epigenes.</td>
-</tr>
-<tr>
- <td class="tdr">224.</td>
- <td class="tdl">Gartner.</td>
-</tr>
-<tr>
- <td class="tdr">225.</td>
- <td class="tdl">Thales.</td>
-</tr>
-<tr>
- <td class="tdr">226.</td>
- <td class="tdl">Strabo.</td>
-</tr>
-<tr>
- <td class="tdr">227.</td>
- <td class="tdl">Endymion.</td>
-</tr>
-<tr>
- <td class="tdr">228.</td>
- <td class="tdl">Atlas.</td>
-</tr>
-<tr>
- <td class="tdr">229.</td>
- <td class="tdl">Hercules.</td>
-</tr>
-</table>
- </td>
-</tr>
-</table>
-
-
-
-<p class="tdr smcap">Oliver C. Farrington.</p>
-
-<p><span class="pagenum" id="Page_13">- 13 -</span></p>
-
-
-<hr class="chap x-ebookmaker-drop" />
-
-<div class="chapter">
-<h2 class="nobreak" id="SOURCES_OF_ADDITIONAL_INFORMATION_ABOUT_THE_MOON">SOURCES OF ADDITIONAL INFORMATION ABOUT THE MOON</h2>
-</div>
-
-
-<p>A number of textbooks and popular works on astronomy
-deal more or less fully with the Moon. Among them the
-following may be mentioned.</p>
-
-<div class="blockquot">
-<p><span class="smcap">Moulton, Forest Ray</span>—Introduction to Astronomy. Macmillan
-&amp; Co., New York. 1916. 577 pp.</p>
-
-<p><span class="smcap">Young, Charles A.</span>—A Textbook of General Astronomy. Ginn
-&amp; Co., Boston. 1898. 630 pp.</p>
-
-<p><span class="smcap">Todd, David P.</span>—Stars and Telescopes. Little, Brown &amp; Co.,
-Boston. 1899. 419 pp.</p>
-</div>
-
-<p>The following are some works which treat exclusively of
-the Moon.</p>
-
-
-<div class="blockquot">
-<p><span class="smcap">Nasmyth, James</span> and <span class="smcap">Carpenter, James</span>—The Moon. John
-Murray, London. 1885. 213 pp. 25 "Woodburytype" plates and several text figures.</p>
-
-<p><span class="smcap">Pickering, William H.</span>—The Moon. Doubleday, Page &amp; Co.,
-New York. 1903. Quarto. 103 pp. and many full-sized plates.</p>
-
-<p><span class="smcap">Proctor, Richard A.</span>—The Moon. Longmans, Green &amp; Co.,
-London. 1898. 314 pp.</p>
-
-<p><span class="smcap">Gilbert, Grove K.</span>—The Moon's Face. Bulletin of the Philosophical
-Society of Washington, 1892-93. Vol. 12, pp. 241-292.</p>
-
-<p><span class="smcap">Shaler, Nathaniel S.</span>—A Comparison of the Features of the
-Earth and the Moon. Smithsonian Contributions to Knowledge. 1907. Vol. 34, pp. 1-79. 25 plates.</p>
-
-</div>
-
-<p><span class="pagenum" id="Page_14"></span></p>
-
-
-<p><span class="pagenum" id="Plate_II"></span></p>
-
-<table id="plate2" style="width:90%; margin: 4em auto;">
-<tr>
- <td class="tdl smcap">Leaflet 6</td>
- <td class="tdc"><div style="width:250px">&#160;</div></td>
- <td class="tdr smcap">PLATE II</td>
-</tr>
-<tr>
- <td class="tdc" colspan="3">
- <a href="images/plate2_lg.png"><img src="images/plate2.png" width="532" height="529" alt="" /></a><br />
- <span class="smaller">Click on image to view larger sized</span>
- </td>
-</tr>
-<tr>
- <td colspan="3"><p class="tdc">CHART OF THE MOON'S SURFACE. AFTER NASMYTH.</p>
- <p class="tdc">The figures refer to the names given on pp. 11 and 12 and the use of the chart with the model will enable the reader to name the different features
- of the moon.</p>
- </td>
-</tr>
-</table>
-<p><span class="pagenum" id="Page_15"></span></p>
-<p><span class="pagenum" id="Page_16"></span></p>
-
-
-
-
-<p class="pmt4 pmb4 tdc">PRINTED BY FIELD MUSEUM PRESS</p>
-
-<hr class="chap" />
-
-<hr class="tb" />
-
-
-<div class="transnote">
-
-<p class="caption3nb">Transcriber Note</p>
-
-<p>The list of "topographic features" (<a href="#Page_11">pp. 11-12</a>) have some numbers missing (115, 116) and a comparison with
-Nasmyth and Carpenter's The Moon was missing those numbers but several other numbers were repeated.
-The repeated numbers appear to represent craters too close to split out.</p>
-
-
-</div>
-
-
-
-<div style='display:block; margin-top:4em'>*** END OF THE PROJECT GUTENBERG EBOOK THE MOON ***</div>
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