| Author: | Symmes, John Cleves, 1780-1829 |
| Subject: | QB, Symmes, John Cleves, 1780-1829, Earth (Planet) -- Miscellanea |
| Format: | Text |
| Date issued: | 2017 |
| Language: | English |
| Publisher: | Project Gutenberg, |
| Rights: | Public domain in the USA. |
| Download link: | Symmes's Theory of Concentric Spheres : Demonstrating that the Earth is hollow, habitable within, and widely open about the poles [electronic resource] / John Cleves Symmes |