2X1-50
Serene Explorations
This sixth duodecade of issues continues a serene exploration of the mathematics of base twelve. The Society’s Members interact continuously with the DSA through the “Dozenal Jottings” department. The Annual Meeting minutes in many issues seem to reveal a tight knit group of folks having a good time under the banner of twelves, and at banquets after the meetings. New puzzles and musings abound in nearly every issue. The Bulletin bravely publishes a debate regarding our Egyptian ancestors’ possible dozenal tendencies at Vol. 31; No. 1, a view flatly rejected in the next issue by Messrs. Whillock and Singmaster. Practical tools like the Fortran conversion scripts and Dr. Rapoport’s dozenal clock appear in the Bulletin. Charles Trigg explores mathematical series in dozenal, Prof. Schiffman covers fundamental dozenal operations, Prof. Zirkel touches on symbology and other topics. A reprise of sorts regarding SI-metric: the idea, even to this day, hasn’t quite breached the American public’s affiliation with the US Customary measurement system. Articles at Vol. 2X; No. 2 and the book review at Vol. 30; No. 2 page E; (#) seem to show metrication is not inevitable and its foreign adoption is usually the effect of government force. The Society seems solid and strong throughout this stretch, and the questing, delightful vigor continues into the next duodecade.
2X2-51
G. Zirkel: “Strange Bases” Part 1; Johnston obituary; “Unfulfilled Prophecy”; Test 1
DuodecimalBulletinIssue2a2-web.pdf
2X3-52
“Strange Bases” part 2; Perfect numbers base, 2 & 4; Newhall’s “Efficient” numerals
DuodecimalBulletinIssue2a3-web.pdf
2E1-53
“Strange Bases” part 3; About duodecimal logarithms; A simpler conversion notation
DuodecimalBulletinIssue2b1-web.pdf
2E2-54
Schiffman’s Ternary decimals; Conversion algorithms; Test 2; Self-descriptive numbers
DuodecimalBulletinIssue2b2-web.pdf
2E3-55
Smith’s “Two-Way Numbers”; TGM reviewed; “Number Bases Elsewhere”, part 2
DuodecimalBulletinIssue2b3-web.pdf
301-56
Trigg’s Pentagonal numbers; Schumacher obituary; “Number Bases Elsewhere”, part 3
DuodecimalBulletinIssue301-web.pdf
302-57
“Doman Numerals”; “Same Numeral, Different Number”; Test 3
DuodecimalBulletinIssue302-web.pdf
303-58
Newhall’s Accuracy scale; “Nude” numbers; Fortran conversion scripts; Dek & el
DuodecimalBulletinIssue303-web.pdf
311-59
Singmaster’s Dozenal in antiquity; Brost’s Origins of dozenal metrology
DuodecimalBulletinIssue311-web.pdf
312-5X
Casting out ‘base minus one’; Antiquity revisited; Test 4 and conversion rules
DuodecimalBulletinIssue312-web.pdf
313-5E
