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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 Bz (11d) | Vol. 4 No. 3 | Year 1164z (1948d) ▶️



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Editor: Ralph Beard

Contents:

  • Why Change?
  • Fine Measurement in Monochromatic Light | Ralph H. Beard
  • Annual Meeting
  • Elements of Proposed Duodecimal Slide Rule | H.K. Humphrey
  • Duodecimal Slide Rule — Further Remarks | Kingsland Camp
  • A Better Value for Pi | Dallas H. Lien
  • Square Sums of Consecutive Squares When N Is Not Square | H.C. Robert, Jr.
  • Donations
  • Mathematical Recreations | Donald M. Brown
  • Reversible Numbers | Ralph H. Beard
  • Additions to Duodecimal Bibliography
  • The Mail Bag
  • Index, Vols. 1–4, 1945–1948
    • Index of Articles
    • Index of Persons
    • Subject Index
  • Counting in Dozens