The Duodecimal Bulletin

Editor: Jamison “Jux” Handy, Jr.

Contents:

• Annual Meeting (page 1_z)
  • Photo: Tom B. Linton, F. Emerson Andrews, and H.C. Churchman, with Circular Slide Rules (page 2_z)
• First U.S. Dek-Cent Postage Stamp 105B_z (1847_d) | U.S. Post Office (page 2_z)
• Julian Period Moments | Gower Neal Euston (page 2_z)
• Replacing Knots | John Jarndyce (page 4_z)
• DIT Acronym for (;) | Thomas Pendlebury (page 4_z)
• Worldwide Zip Code | H. C. Churchman (page 5_z)
  • Zip Angles (page 5_z)
  • London and Chelmsford Zip Code Symbols (page 6_z)
• American Mistakes of the Past | Lawrence Boythorn (page A_z)
• Base Twelve Military Weapons and E-Z Locator | Lt. Col. Grosvenor Bond, FA-Res. (page 10_z)
• Simpler Sums (Abstracted From) | J. Halcro Johnston (page 11_z)
  • A Change to Decimals (page 11_z)
  • Why so Unpopular? (page 11_z)
  • Small Factors (page 11_z)
  • Decimal Shortcomings (page 12_z)
  • The Choice of a Better System (page 12_z)
  • Twelve Arithmetic (page 13_z)
  • What Benefits Would Result (page 13_z)
  • Multiplication (page 14_z)
  • Shortcuts (page 14_z)
  • Compound Sums (page 14_z)
  • Why Was It Not Thought of Before? (page 14_z)
• Renaissance in Arithmetic | Henry C. Churchman (page 16_z)
• Case Against Decimalisation, Part II | A. C. Aitken, M.A., D.Sc., F.R.S., Prof. Mathematics, Univ. of Edinburgh (page 17_z)
  • Recapitulation (page 17_z)
  • Monetary and Metrical Units (page 17_z)
  • General Arithmetic (page 18_z)
• Base-Ten — A Double Prime | Egbert Pardiggle (page 21_z)
• Telephone and Social Security Numbers | Westbourn Grove (page 22_z)
  • Double Our Population? (page 22_z)
  • Social Security Unique Groupings (page 23_z)
  • Numbers and Symbols (page 23_z)
  • Other Uses (page 24_z)
• (T. Jefferson's) Poplar Forest Retreat, Lynchburg, Virginia | H. C. Churchman (page 25_z)
• Counting in Dozens (page 26_z)