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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.


Title: Rationality
Author: Donald Hammond ("Troy")
Year: 11X0
Subject: The role of ratios in weights and measures.
Written by long-time DSGB pillar Donald Hammond under the exceedingly apt pseudonym "Troy," this work expounds on the notion of "Rationality" in arithmetic and weight and measures. Explaining that "Rationality" means taking into account the appropriate ratios, Hammond explains how the "troy" system (dozenal) is more efficient in most applications than decimal, and proposes an interestingly different version of the protractor. The discussion of kitchen weights and bricklaying are particularly interesting.