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Dozenal Society of America
Promoting base twelve and alternative base mathematics
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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.

Duodenal System of Arithmetic, Measures, Weights and Coins

Title: Duodenal System of Arithmetic, Measures, Weights and Coins
Author: John William Nystrom
Year: 1103
Subject: A defense of dozenal arithmetic and measurement, along with proposed symbols, nomenclature, and metrics.
John William Nystrom, a famous Swedish-American engineer (1081--1111), is mostly known mathematically for his unquadral (hexadecimal) "Tonal" system. However, later in life, Nystrom became a dozenalist, publishing the current article as an appendix to a textbook on mechanics. The DSA is proud to offer this remastered version of Nystrom's arrival at dozenalism, noting that it contains a great deal of food for thought for anyone interesting in number bases.