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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.

The Duodecimal Bulletin

◀️ Issue: Whole Number 6Bz (83d) | Vol. 35z (41d) No. 2 | Year 11A0z (1992d) ▶️



Click to view PDF

Editor: Dr. Patricia Zirkel

Cover Title: Dozenal Music Revisited

Contents:

  • Board of Directors Meeting
  • Conversion of Numbers to Base Dek | Jean Kelly
  • Dyhexal Numbers: How They Facilitate Arithmetic | Gerard Robert Brost
    • Introduction
    • Some advantages of base twelve mathematics
    • Dyhexal notation
  • Math Forum | Betsy Colwell
  • Available from the Society
  • Dozenal Music Revisited | John D. Hansen, Jr.
  • Dozenal Jottings | From Members and Friends
    • Ken Stilwell
    • Underwood Dudley | A Budget of Trisections
    • Bill Crosby called! (Pvt William S. Crosby)
    • Jay Schiffman
    • Alice Berridge
    • John Churchman, regarding Henry Churchman
    • John D. Hansen | entered DSA into contest at Radio Electronics
    • Arthur Whillock (DSGB)
    • Charles Ashbacher
    • Don Hammond (DSGB) | Rational Fahrenheit Scale
    • Sizable donations: Richard Trelfa, Henry Churchman, Dr. Robert Lovell, “Skip” Scifres
    • New member: Robert High
  • Think About It!!!
  • DSA Seal Puzzle Solutions | Charles Ashbacher
  • In Memoriam — Isaac Asimov
  • Another Solution to a Base Twelve Crossnumber Puzzle | Jay L. Schiffman
  • Why Change?
  • Counting in Dozens
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