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Symmes, John Cleves, 1780-1829: Symmes's Theory of Concentric Spheres: Demonstrating That the Earth is Hollow, Habitable Within, and Widely Open About the Poles (Cincinnati: Morgan, Lodge, and Fisher, 1826), also by James McBride (multiple formats at archive.org) Symmes, John Cleves, 1780-1829: Symzonia: Voyage of Discovery (attribution to Symmes not certain; New-York: J. Seymour, 1820) (illustrated HTML with commentary at sacred-texts.com)Help with reading books -- Report a bad link -- Suggest a new listing
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Symmes, John Cleves, 1780-1829: The Symmes theory of concentric spheres, demonstrating that the earth is hollow, habitable within, and widely open about the poles. (Louisville, Ky., Printed by Bradley & Gilbert, 1878), also by Americus Symmes (page images at HathiTrust) Symmes, John Cleves, 1780-1829: Symmes's Theory of Concentric Spheres: Demonstrating that the Earth is hollow, habitable within, and widely open about the poles, also by James McBride (Gutenberg ebook)See also what's at your library, or elsewhere.
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