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. First Edition. Hardcover. Duodecimo. [i-v], vi-vii, [viii-xiii], 14-163 pages. The first formal exposition of the Hollow Earth theory of John Cleves Symmes, Jr. by one of his acolytes. Supposes the Earth is composed of concentric habitable spheres which are open at the poles and..... More










