Seal of the DSA
Dozenal Society of America
Promoting base twelve and alternative base mathematics
Support the DSA
Follow Us
Icon for DSA's X Icon for DSA's Facebook Icon for DSA's RSS
Share This Page
Icon for sharing via X Icon for sharing via Facebook Icon for sharing via email
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 75z (89d) | Vol. 38z (44d) No. 2 | Year 11A3z (1995d) ▶️



Click to view PDF

Editor: Prof. Jay Schiffman

Cover Title: Presenting Ralph Beard Memorial Award to Arthur Whillock

Contents:

  • Announcement of Our Annual Meeting — 11A2z (1994d)
  • Problem Corner: Duodecimal Perfect Numbers | Jay L. Schiffman
  • A Brief Introduction to Dozenal Counting | Gene Zirkel
    • Origins
    • Solutions
    • Human Progress
    • A Misconception
    • Counting
    • Conclusion
  • Annual Award: Arthur Whillock
  • If We Only Had Twelve Fingers | Rafael Marino
    • Numbers in Dozenland
    • Time in Dozenland
    • Geometry in Dozenland
  • From the Editor | Jay L. Schiffman
    • Letter from new member | Robert J. McGehee
  • Dozenal Jottings | From Members and Friends
  • New Letter | John R. Porter
    • Defects in Conventions of Communication | John R. Porter
  • Anti Metric Protest Success! | Jean Kelly
  • Why Change?