Sectional View of the earth Showing the Opening at the Poles, a diagram from 'Symzonia' by Capt. Adam Seaborn, probably a pseudonym used by Capt. John Cleves Symmes. [c.1820]
Source: publicdomainreview.org
Sectional View of the earth Showing the Opening at the Poles, a diagram from 'Symzonia' by Capt. Adam Seaborn, probably a pseudonym used by Capt. John Cleves Symmes. [c.1820]