16972.git, branch main Scientific American Supplement, No. 711, August 17, 1889 initial commit of ebook 16972 2025-10-15T11:50:05+00:00 Roger Frank rfrank@pglaf.org 2025-10-15T11:50:05+00:00 291563aa4093d1705b4ca160cb6a2e6ceffa8314