Terrasphere

Dimensions

overall: 15 3/8 in x 10 in x 9 3/4 in; 39.0525 cm x 25.4 cm x 24.765 cm

Museum

National Museum of American History

Patent model for Eleazer Root, “Terrasphere,” U.S. Patent 60,642 (Dec. 18, 1866). Eleazer Root (1802-1887), an educator and Episcopalian priest who spent many years in the Midwest, designed two astronomical demonstration instruments. See also Eleazer Root, “Improvement in Terrasphere,” U.S. Patent 69,842 (Oct. 15, 1867).

The museum's own record (Smithsonian, National Museum of American History)

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