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The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

Mathamerica



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Title: Mathamerica

Author: Grover Cleveland Perry

Year: 1149z (1929d)

Subject:A stridently patriotic argument in favor of dozenals from an interwar Protestant American viewpoint.

Written during the period between the two World Wars, Mathamerica is almost more of a paean to the semi-imperialist Protestant American views of its author than to dozenals. However, despite its jingoism and provincialism, the work does contain much that could be interesting to dozenalists, particularly students of the history of dozenal and other non-decimal bases. Written in the years preceding our own F. Emerson Andrews’s more broadly-based work, Grover Cleveland Perry’s pamphlet Mathamerica reviews dozens, fractions, basic arithmetic, and basic geometry in his justification for and praise of dozenals. An interesting addition to the Dozenal Society of America’s library.