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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 72z (86d) | Vol. 37z (43d) No. 1 | Year 11A2z (1994d) ▶️



Click to view PDF

Editor: Prof. Jay Schiffman

Cover Title: In Memoriam: A Duodecimal Legend

Contents:

  • In Memoriam: Frederick A. Newhall | Jay Schiffman
  • Minutes of the Annual Meeting — 11A1z (1993d) | Alice Berridge
    • Board of Directors Meeting
    • Annual Membership Meeting
      • President’s Report: Fred Newhall
      • Treasurer’s Report: Gene Zirkel
      • Editor’s Report: Jay Schiffman
      • Committee Reports
        • Annual Meeting Committee | Alice Berridge
        • Awards Committee | Gene Zirkel
        • Nominating Committee | Alice Berridge
      • Other Business
    • Featured Speakers
      • Jay Schiffman | Duodecimal Combinatorics
      • Gene Zirkel | About Nothing (0)
  • Duodecimal Combinatorics | Jay L. Schiffman
    • Introduction
    • First Application: Telephone Numbers
    • Second Application: License Plate Problems
    • Third Application: Radio stations
    • Fourth Application: Number Theoretic Problems
  • Significant Digits & Factorials | Gene Zirkel
    • Introduction
    • Some Background Information
    • The Number of Zeros
    • One Last Unsolved Question
  • Election Results: Jay Schiffman as President
  • Henry Clarence Churchman: Editor, President, Board Member, Inspiration | Gene Zirkel
  • Twelves and LCMs | Monte J. Zerger
  • Dozenal Jottings | From Members and Friends
    • Charlie and Miriam Bagley
    • Ruby and Arthur Whillock (DSGB)
    • Paul Rapoport | A Dozenal Wristwatch
    • New Members: Dr. James McElhattan (Greece), Glenn Bernius, Michael Wilson, Michael Kinyon, Rafael Marino
  • Find the Next Term, part II | Jean Kelly
  • Counting in Dozens