Symmes Theory of Concentric Spheres, Showing That The Earth Is Hollow

This evening, relax and sleep with one of the weirder scientific theories ever conceived, that the Earth is hollow and filled with other worlds. But first, there are 30 minutes of ambling preambles, because in 1826, of course there are. Enjoy!

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Read "Symmes Theory of Concentric Spheres" at Project Gutenberg: http://www.gutenberg.org/ebooks/54329

Music: "Boring Books for Bedtime" by Lee Rosevere, licensed under CC BY http://leerosevere.bandcamp.com

All Boring Books for Bedtime readings are taken from works in the public domain. If you'd like to suggest a copyright-free reading for soft-spoken relaxation to help you overcome insomnia, anxiety and other sleep issues, I'd love to hear from you!