The Duodecimal Bulletin

Editor: Dr. Patricia Zirkel

Cover Title: Art Contest!

Contents:

• Minutes of Annual Meeting of 1986 (1196;)
  • Board of Directors Meeting
    • Remarks of teh Chair | Dr. John Impagliazzo
    • Committee Appointments 1986-1987
  • Annual Membership Meeting
    • President’s Report | Gene Zirkel
    • Treasurer’s Report | James Malone
    • Editor’s Report | Patricia Zirkel
    • New Business
  • Afternoon Presentations
    • Fred Newhall | evolution of number systems
    • Gene Zirkel | Another Set of Symbols: Binary Coded Dozenal Digits
    • Ellis Von Eschen | multiplicative magic squares
    • Dudley George | factoring in decimal and dozenal
  • Evening Banquet
• Art Contest: Brochure Design Contest with cash prizes
• Terminal Digits of Pentagonal Numbers | Charles W. Trigg
• In Memoriam: William C. Schumacher
• Annual Award 1986: Gene Zirkel
• Number Bases Elsewhere, part III
  Joe Baehr | letter to Mathematics Teacher | “proof” that half of eleven is six
• Dozenal Jottings
  • Dr. John Impagliazzo | guest lecturer at International Centre for Theoretical Physics in Europe
  • Fred Newhall | in University of Rochester Review
  • Gene Zirkel | “Half of 12 is 7”
  • Bruce Moon (New Zealand)
  • Jerry Brost | proposes “Twella” as panda mascot name
  • Robert $. McPherson
  • Arthur Whillock (DSGB)
  • New members:
    • Robert K. Sonntag
    • Elaine O. Furman
    • David Adam Horowitz
    • Prof. Larry J. Aufiero, Nassau Community College
    • Paul M. Schumacher
• Puzzle Corner: “Twelves”
• Why Change?
• Counting in Dozens