The Duodecimal Bulletin

Editor: Dr. Patricia Zirkel

Cover Title: Fred & Mary Newhall after 1990 DSA Annual Meeting

Contents:

• Minutes of Annual Meeting of 1990_d (119A_z)
  • Board of Directors Meeting
    • Election of Officers
    • Appointments
    • Other Business
  • Annual Membership Meeting
    • President’s Report | Fred Newhall
    • Treasurer’s Report | Anthony Catania
    • Vice Predient’s Report | Gene Zirkel
    • Editor’s Report | Patricia Zirkel
    • Committee Reports
      • Annual Meeting Committee | Dr. Barbara Smith
      • Awards Committee | Gene Zirkel
      • Nominating Committee | James Malone
    • New Business
  • Featured Speaker | Jay Schiffman | A Survey of Modular Systems with Applications to Checking Arithmetic Computations
  • Evening Entertainment
• Survey of Fractions and Duodecimals in Base Twelve | Jay Schiffman
• You Can Count on Them | Gene Zirkel
• Why I Joined the Dozenal Society | Brian Dean
• In Memoriam: Dr. Ellis R. Von Eschen
• Dozenal Jottings | From Members and Friends
  • jay Schiffman
  • Dick Trelfa
  • H.K. Baumeister | memoirs of General W.T. Sherman
  • John Ryan (NCC) | response to Cedric Smith
  • Bruce Moon
  • John Churchman | regarding Henry Churchman
  • Fred Newhall
  • Sean Ferguson (DSGB)
  • Arthur Whillock (DSGB) | “Methods of Conversion”
  • Don Hammond (DSGB) | regarding Tom Pendlebury’s dozenal slide rule
  • New Members:
    • Randall James Roges
    • Sr. Monica Ann Zore
    • John D. Hansen, Jr
• “Digit Reversal” Solution | Charles Ashbacher
• Available from the DSA
• Remembering Pi | Jean Kelly
• A Cryptarithm | A Puzzle
• More about Binary Coded Digits | Donald Hammond
• A Dream You Can Count On
• Counting in Dozens