15050.git, branch main Scientific American Supplement, No. 810, July 11, 1891 initial commit of ebook 15050 2025-10-15T11:45:55+00:00 Roger Frank rfrank@pglaf.org 2025-10-15T11:45:55+00:00 aee90a31a5023b8ea6b943b35d225fbf4bf6cb2b