http://book.klll.cc/ebooks/author/47800.opds?sort_order=title 2025-11-14T18:12:24Z Books by Symmes, John Cleves Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-11-14T18:12:24Z https://en.wikipedia.org/wiki/John_Cleves_Symmes_Jr. See also: en.wikipedia 2025-11-14T18:12:24Z https://book.klll.cc/ebooks/54329.opds Symmes's Theory of Concentric Spheres John Cleves Symmes and James McBride