361-70
Exquisite Analysis, and Dear Friends Lost
This dozen-issue set sees Prof. Jay Schiffman take the Editorship, and continue the exquisite analysis of the mathematical properties of base twelve. He and others explore the Fibonacci sequence, modular checking of arithmetic, factorials and significant digits, perfect numbers, properties of dozenal digits, and number-theoretical properties of integers less than one gross. Anti-metric discussion is minimal but not forgotten. William Lauritzen and Timothy Travis write books involving the dozen and are reviewed. It seems more often than not, an obituary to a mainstay of the Society both here or in Britain appears in the Bulletin. Notables like Don Hammond, British editor; Fred Newhall, bibliographer; Henry Churchman, editor; Charles Bagley, longtime board member; James Malone, author, treasurer, board chair; Dudley George, early enthusiast, longtime member and fellow; Jamison “Jux” Handy, Editor and early Member, all pass on. On 18 July 1995, Prof. Gene Zirkel was interviewed on National Public Radio’s “All Things Considered” on the merits of duodecimal numeration.
362-71
Schiffman’s modular arithmetic checking; numerals; powers of two; time periods
DuodecimalBulletinIssue362-web.pdf
371-72
Schiffman’s dozenal combinatorics; sigfigs & factorials; twelves and LCMs
DuodecimalBulletinIssue371-web.pdf
372-73
Newhall’s dozenal chronology; Dean’s nonintegral bases; Pascal’s triangle
DuodecimalBulletinIssue372-web.pdf
381-74
Schiffman’s integer personalities to one gross; Travis book reviewed
DuodecimalBulletinIssue381-web.pdf
382-75
Perfect numbers; Marino’s full dozenal system; Zirkel’s brief dozenal primer
DuodecimalBulletinIssue382-web.pdf
391-76
Calculator conversions; metric; Lauritzen, Faulkner’s & Chu’s essays; Authors’ guide
DuodecimalBulletinIssue391-web.pdf
392-77
US aversion to metric; Moon’s perfect number problem; design contest for transdecimals
DuodecimalBulletinIssue392-web.pdf
3X1-78
Dr. Impagliazzo’s “Dits & Dozens”; “Save the Inch”; Schiffman’s Fibonacci numbers
DuodecimalBulletinIssue3a1-web.pdf
3X2-79
Dozenal dates; Schiffman’s digits of dozenal integers; NPR Interview
DuodecimalBulletinIssue3a2-web.pdf
3E1-7X
Lauritzen’s numerals; Schiffman’s recursive sequences in three bases; How metric is Europe?
DuodecimalBulletinIssue3b1-web.pdf
3E2-7E
