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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.

Trigons to Triads

Title: Trigons to Triads: A Play on Chords
Author: Troy (Donald Hammond)
Year: 119E
Subject: An exploration of triangles; Pythagorean triples; and their innate dozenal properties in relation to musical chords.
http://www.dozenal.org/../sites_bck/default/files/DSA_troy_trigons_dialer.pdf
"Troy" (Donald Hammond, of the DSGB) writes a fascinating little article about triangles; Pythagorean triples; and how they relate to chords, and provides a wonderful little printable "chord dialer" that uses the innate properties of the dozen to identify harmonious chords for music.
© 11E9-1205 (decimal 2013-2021). The Dozenal Society of America. Contact Us
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Numeration on this site is in dozenal (also called duodecimal, or base twelve), using "X" for ten and "E" for eleven.
0 1 2 3 4 5 6 7 8 9 X E 10 11 12 13 14 15 16 17 18 19 1X 1E 20 21 22...
PDF documents may use a Dwiggins stylized "X" and "E" or the Pitman inverted "2" and "3".
The Humphrey point, or semicolon, is used for fractional parts; e.g., "0;6 = 0.5."