Symmes's Theory of Concentric Spheres, by Anonymous 54329 [Subtitle: Demonstrating that the Earth is hollow, habitable within, and widely open about the poles] [Link: http://www.gutenberg.org/5/4/3/2/54329 ] [Files: 54329-0.txt; 54329-h.htm] Thanks to Chris Curnow, Daniel Lowe and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David