The Duodecimal Bulletin

The long-running official journal of the Dozenal Society of America, the Duodecimal Bulletin has been published at varying intervals since 1161 (decimal 1945).

Issues between 1161 and 11E4 are available as scanned, web-optimized pdf documents; editions subsequent to 11E4 are available as normal pdf documents (having been originally produced that way). The issues published most recently are available only for members.


Historical Summary | Pictorial Synopsis

011-00

Cover for Bulletin Issue 011
Inaugural Issue

012-01

Cover for Bulletin Issue 012
The Doremic Metric System

013-02

Cover for Bulletin Issue 013
The Opposed Principles

021-03

Cover for Bulletin Issue 021
Camp Numerals; Ideas and Opinions

022-04

Cover for Bulletin Issue 022
Mathematical Tables; Sine, Cosine, Tangent

031-05

Cover for Bulletin Issue 031
Fibonacci Sequence; Tables of Logs, Trig

032-06

Cover for Bulletin Issue 032
Squares; Square Roots; Prime Numbers

033-07

Cover for Bulletin Issue 033
"Kin of the Golden Mean"; Cube Roots

034-08

Cover for Bulletin Issue 034
H. G. G. Robertson's Full Dozenal System

041-09

Cover for Bulletin Issue 041
G. Elbrow’s Full Dozenal System

042-0X

Cover for Bulletin Issue 042
Godjevatz Music Notation, Table of Prime Periods

043-0E

Cover for Bulletin Issue 043
Dozenal Slide Rule

051-10

Cover for Bulletin Issue 051
On the Graduation of Scales

052-11

Cover for Bulletin Issue 052
More’s Music Notation, Pythagorean Triangles

061-12

John W. Nystrom’s full dozenal system

062-13

Cover for Bulletin Issue 062
“The Reverse Notation”, “Cyclic Sequences” “Do-Metric Standards”: Length

063-14

Cover for Bulletin Issue 063
Perry’s “Mathamerica”; “Do-Metric Standards” (Mass & Time)

071-15

Cover for Bulletin Issue 071
Logarithms, Conversion of large numbers, Do-Metric Dynamic Units

081-16

Cover for Bulletin Issue 081
Ecclesiastical Dozens, Constants, Right Triangles; Maps, Time, Stars, & the Calendar

082-17

Cover for Bulletin Issue 082
Dozenal Bibliography; Chronology < 1800; Math Tables

091-18

Cover for Bulletin Issue 091
“How We Began”; Do-Metric Thermal Units; Van Buskirk’s “Uncials”; Zirkel’s “Dozener”

0X1-19

Cover for Bulletin Issue 0X1
Adams’s Measure Reform; Fibonacci & Reciprocals; other number theoretical studies

0E1-1X

Cover for Bulletin Issue 0E1
Churchman’s “Do-Re-Mi” Interlingua nomenclature; time & angle conversions

0E2-1E

Cover for Bulletin Issue 0E2
About Herbert Spencer, Comprehensive Bulletin Index

101-20

Cover for Bulletin Issue 101
“Roman Dumerals”; Churchman’s “Doremic" System of Weights and Measures

101-21

Cover for Bulletin Issue 102
Essig’s “Douze Notre Dix Futur”; Henry Martyn Parkhurst’s work

111-22

Cover for Bulletin Issue 111
Reaction to Jean Essig; Acclaim for Parkhurst as dozenal pioneer; Beard’s “Time of Decision”

112-23

Cover for Bulletin Issue 112
Esperanto; Doremic Time; “Aversion to Arithmetic”

121-24

Cover for Bulletin Issue 121
Doremic Angular Measure; Bagley’s “Redivivus Reckoning” full dozenal system

122-25

Cover for Bulletin Issue 122
Valevsky’s dozenal metric system; Goodman’s thoughts on dozenal; bibliography supplement

131-26

Cover for Bulletin Issue 131
Birth of the DSGB; Comments on dozenal measurement units; Doremic Dimensions

132-27

Cover for Bulletin Issue 132
DSGB commentary; P. Andrews on measure; Table of powers of 12; Conversion methods

141-28

Cover for Bulletin Issue 141
Dozenal math club charts; Metric inches; Divisibility tests; Division from the right

142-29

Cover for Bulletin Issue 142
P. Andrews on time and distance; Bishop on money and measurement; Doremic surface measure

151-2X

Cover for Bulletin Issue 151
Dozenal Abacus; Doremic money, volume, mass; The “New Yorker” reports DSA meeting

152-2E

Cover for Bulletin Issue 152
The meter and English measures; Churchman’s comments: standards; Bulletin Index Vols. 10-15

161-30

Cover for Bulletin Issue 161
Palindromic Numbers; Linton on Abacus; Churchman’s Metron; Casting Out E;’s

171-31

Cover for Bulletin Issue 171
Patterns for El; Duodecimal Geometry; Beard’s “Duodecimal Perspectives”

181-32

Cover for Bulletin Issue 181
Etymology for Bases; “Let’s Not Go Metric”; Linton’s Dimensioning; Gilles’ weights & measure

191-33

Cover for Bulletin Issue 191
The Bruce Moon Issue: Decimal Currency; Conversion algorithm

192-34

Cover for Bulletin Issue 192
“Inches & Miles”; Modernize the metric system; First 5 dozen decimal powers of twelve

1X0-35

Cover for Bulletin Issue 1X0
Julian dates; New unit replacing knots; Simpler sums; Renaissance in arithmetic.

1E1-36

Cover for Bulletin Issue 1E1
Linton’s “Dimensioning Challenge”; The Hexadecimal Issue; Churchman’s calendar.

1E2-37

Cover for Bulletin Issue 1E2
Kothe’s “Chromatic Musical Scales and Notation” part 1; Math constants

200-38

Cover for Bulletin Issue 200
Cesium second; Krypton meter; Measurement in general; Kothe continued; George S. Terry

210-39

Cover for Bulletin Issue 210
Kothe’s music part 3; A dozenal computer; Accord on measure; Essig obituary

220-3X

Cover for Bulletin Issue 220
“Winchester Declarations”; Dozenal measurement (metronic system); Slide rules

230-3E

Cover for Bulletin Issue 230
Davies’ “A Duodecimal Calendar”; dismay over metric; Bulletin Index Vols. 16-23

240-40

Cover for Bulletin Issue 240
Julian dates on cover; Discussions of the “navinaut”; dozenal distances and time

251-41

Cover for Bulletin Issue 251
The Bell (*, #) numerals replace the “classic”; “Hawaii” temperature scale

261-42

Cover for Bulletin Issue 261
Relaunch; Malone’s “Simple Approach to Dozenal”; Minutes 1974, 1975

271-43

Cover for Bulletin Issue 271
Schiffman’s Group theoretic application of number 12; Minutes 1976, 1977

272-44

Cover for Bulletin Issue 272
G. Zirkel’s symbols article; DSA meeting in the national news

273-45

Cover for Bulletin Issue 273
“Symbols - a Plea for Unity; “Dozen Properties of Twelve”; Minutes 1978, 1979

281-46

Cover for Bulletin Issue 281
“How Do You Pronounce 32?”; Bagley’s “Deserved Oblivion”

282-47

Cover for Bulletin Issue 282
K. Camp Obituary; Calendar Reform; “Who We Are”: Anton Glaser

283-48

Cover for Bulletin Issue 283
Trigg’s “Cyclic Duodecimal Integers”; G. Zirkel’s Unambiguous notation; “Axiological Analysis”

291-49

Cover for Bulletin Issue 291
Duodecimal primes; “Who We Are”: Robert McPherson

292-4X

Cover for Bulletin Issue 292
Precision in converting fractions; Newhall’s dozenal essay; “Who”: Dr. Angelo Scordato

293-4E

Cover for Bulletin Issue 293
Bulletin Index Vols. 24-29

2X1-50

Cover for Bulletin Issue 2X1
Duodecimal palindromes; Reverse notation revisited; “Who We Are”: Dudley George

2X2-51

Cover for Bulletin Issue 2X2
G. Zirkel: “Strange Bases” Part 1; Johnston obituary; “Unfulfilled Prophecy”; Test 1

2X3-52

Cover for Bulletin Issue 2X3
“Strange Bases” part 2; Perfect numbers base, 2 & 4; Newhall’s “Efficient” numerals

2E1-53

Cover for Bulletin Issue 2E1
“Strange Bases” part 3; About duodecimal logarithms; A simpler conversion notation

2E2-54

Cover for Bulletin Issue 2E2
Schiffman’s Ternary decimals; Conversion algorithms; Test 2; Self-descriptive numbers

2E3-55

Cover for Bulletin Issue 2E3
Smith’s “Two-Way Numbers”; TGM reviewed; “Number Bases Elsewhere”, part 2

301-56

Cover for Bulletin Issue 301
Trigg’s Pentagonal numbers; Schumacher obituary; “Number Bases Elsewhere”, part 3

302-57

Cover for Bulletin Issue 302
“Doman Numerals”; “Same Numeral, Different Number”; Test 3

303-58

Cover for Bulletin Issue 303
Newhall’s Accuracy scale; “Nude” numbers; Fortran conversion scripts; Dek & el

311-59

Cover for Bulletin Issue 311
Singmaster’s Dozenal in antiquity; Brost’s Origins of dozenal metrology

312-5X

Cover for Bulletin Issue 312
Casting out ‘base minus one’; Antiquity revisited; Test 4 and conversion rules

313-5E

Square integers; Dr. Rapoport’s Dozenal clock; Schiffman’s Fundamental Operations

314-60

Cover for Bulletin Issue 314
Bulletin Index Vols. 2X-31

321-61

Cover for Bulletin Issue 321
Index addenda; Paquette’s dozenal essay; Dr. Rapoport’s dozenal computer quiz

322-62

Cover for Bulletin Issue 322
Schiffman’s “Fundamental Operations”, part 2; “10;0 = One Dozen”; The communication age

323-63

Cover for Bulletin Issue 323
DSA Constitution and By-Laws; Trigg obituary; “2B or not 2B”

331-64

Cover for Bulletin Issue 331
P. D. Thomas; Newhall’s “Nu-Age Calendar”; Dr. Impagliazzo’s “Music, Scales, & Dozens” part 1

332-65

Cover for Bulletin Issue 332
“Music, Scales & Dozens” part 2; Trigg’s 2nd order dozenal digital root bracelets

333-66

Cover for Bulletin Issue 333
G. Zirkel’s “Binary Coded Digits”

341-67

Cover for Bulletin Issue 341
Schiffman’s survey of dozenal fractionals; Hammond’s acclaim for Binary Coded Digits

342-68

Cover for Bulletin Issue 342
Smith’s best base essay; History prof’s long hundred; Trigg’s prime palindromes

343-69

Cover for Bulletin Issue 343
Schiffman’s “Remarkable Prime Numbers”; Churchman’s “Metrons”; Scientific notation

351-6X

Cover for Bulletin Issue 351
Long hundreds; Earliest dozenal book; Schiffman’s “Superprimes”

352-6E

Cover for Bulletin Issue 352
Conversion to ten; Brost’s “Dyhexal”; Colwell’s dozenal essay; Hansen’s dozenal music

361-70

Cover for Bulletin Issue 361
Congruences in dozenal divisibility tests; Nu’s best base essay; Kapreker; factorials

362-71

Cover for Bulletin Issue 362
Schiffman’s modular arithmetic checking; numerals; powers of two; time periods

371-72

Cover for Bulletin Issue 371
Schiffman’s dozenal combinatorics; sigfigs & factorials; twelves and LCMs

372-73

Cover for Bulletin Issue 372
Newhall’s dozenal chronology; Dean’s nonintegral bases; Pascal’s triangle

381-74

Cover for Bulletin Issue 381
Schiffman’s integer personalities to one gross; Travis book reviewed

382-75

Cover for Bulletin Issue 382
Perfect numbers; Marino’s full dozenal system; Zirkel’s brief dozenal primer

391-76

Cover for Bulletin Issue 391
Calculator conversions; metric; Lauritzen, Faulkner’s & Chu’s essays; Authors’ guide

392-77

Cover for Bulletin Issue 392
US aversion to metric; Moon’s perfect number problem; design contest for transdecimals

3X1-78

Cover for Bulletin Issue 3X1
Dr. Impagliazzo’s “Dits & Dozens”; “Save the Inch”; Schiffman’s Fibonacci numbers

3X2-79

Cover for Bulletin Issue 3X2
Dozenal dates; Schiffman’s digits of dozenal integers; NPR Interview

3E1-7X

Cover for Bulletin Issue 3E1
Lauritzen’s numerals; Schiffman’s recursive sequences in three bases; How metric is Europe?

3E2-7E

Cover for Bulletin Issue 3E2
Evidence of metric unpopularity; nonsense; Patten’s Law (best base essay)

401-80

Cover for Bulletin Issue 401
DSA’s first website; Country’s “Numbers and Number Systems”; consumer preference

402-81

Cover for Bulletin Issue 402
Errors in Sumerian kingship terms; Churchman’s Doremic system reprint

411-82

Cover for Bulletin Issue 411
Schiffman’s congruences in base-16 divisibility tests; Kelly’s “Copy Book Wisdom”

412-83

Cover for Bulletin Issue 412
Metric Big Brother; Patten’s “Future of Counting and Measure”; Mathematica conversions

421-84

Cover for Bulletin Issue 421
Anti-metrication letters; Pythagorean triples

422-85

Cover for Bulletin Issue 422
Metric martyr’ loses; “How Metric is Europe?”

431-86

Cover for Bulletin Issue 431
“Almost Base Twenty”; “Dozenals in the Classroom”

432-87

Cover for Bulletin Issue 432
Whillock’s “In Defense of Natural Measures”; Dozenal calculator, SSNs; Prime repunits

441-88

Cover for Bulletin Issue 441
“Drastic Measures”; letters describing dozenal chemistry, watches, duodecades

442-89

Cover for Bulletin Issue 442
BMWA warns: sneak attack; English measures: scientific importance; “Irregular Dozenal Digits”

451-8X

Cover for Bulletin Issue 451
Punter’s dozenal calculator; “Some of Our Story”; “Eggsactly a Dozen” reprint

452-8E

Cover for Bulletin Issue 452
Reverse notation reprint; Metric trouble in Britain; The five dozenth Annual Meeting

461-90

Cover for Bulletin Issue 461
“Whence the Octothorpe”; Ternary computers & money; McClellan reprint

462-91

Cover for Bulletin Issue 462
Aspirant’s Test No. 1; Leubner’s dozenal terminology

471-92

Cover for Bulletin Issue 471
First DSA Website; Schiffman’s “The Most Appealing Integer” part 1; Aspirant’s Test 2

472-93

Cover for Bulletin Issue 472
Schiffman Part 2; (Rhombic) Dodecahedron; Whillock obituary; Tengwar numerals

481-94

Cover for Bulletin Issue 481
Proctor’s essay on alternative bases; “EU’s Metric obsession”

482-95

Cover for Bulletin Issue 482
Evans’ “Numbers Cheaper by the Dozen?”; On the name change of the DSA

491-96

Cover for Bulletin Issue 491
Evans’ essay part 2; Zirkel’s extension of Schumacher’s binary coded digits

492-97

Cover for Bulletin Issue 492
History of the DSA New Media and Digital Bulletin; Return to classic numerals

4X1-98

Cover for Bulletin Issue 4X1
History of the DSGB; Osburn’s Number base study; Clayton’s Dozenal nomenclature

4X2-99

Cover for Bulletin Issue 4X2
The Symbology Issue 1; Symbology Overview; Dozenal Numerals Feature; LaTeX Dozenal Displays

4E1-9X

Cover for Bulletin Issue 4E1
Digital Fractions; The Symbology Issue 2; Tools for Numeral Crafting; DozensOnline Digest

4E2-9E

Cover for Bulletin Issue 4E2
Dozenal Home Primes; Pronouncing Dozenals; Simon Stevin; Key Dozenal Fractions

510-X0

Cover for Duodecimal Bulletin 501.
Dozenal division of the circle; base X0

511-X1

Cover for WN X1
Systematic Dozenal Nomenclature and other nomenclature systems.

521-X2

Cover for WN X2
Base Annotation Schemes