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Symmes's theory of concentric spheres; demonstrating that the earth is hollow, habitable within, and widely open about the poles.

Title:Symmes's theory of concentric spheres; demonstrating that the earth is hollow, habitable within, and widely open about the poles.
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Note:Printed and published by Morgan, Lodge and Fisher, 1826
  
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Subject:Earth (Planet) -- Miscellanea
Subject:Symmes, John Cleves, 1780-1829
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