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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.
http://www.dozenal.org/../sites_bck/default/files/DSA_nystrom_duodenal_arith_0.pdf

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.