Symmes' Theory of Concentric Spheres, Showing That the Earth Is Hollow, Part 5 (Conclusion)
Let's relax with the conclusion of this most remarkable book of geological theory. This time, a plea to scientific advancement and nation-building in the form of an expedition to the Earth's interior, an outline of the voyage, and a glowing portrait of Captain Symmes and his genius. Well, at least he tried, I guess?…
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