011-00
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
012-01
The Doremic Metric System
DuodecimalBulletinIssue012-web_0.pdf
013-02
The Opposed Principles
DuodecimalBulletinIssue013-web.pdf
021-03
Camp Numerals; Ideas and Opinions
DuodecimalBulletinIssue021-web.pdf
022-04
Mathematical Tables; Sine, Cosine, Tangent
DuodecimalBulletinIssue022-web.pdf
031-05
Fibonacci Sequence; Tables of Logs, Trig
DuodecimalBulletinIssue031-web.pdf
032-06
Squares; Square Roots; Prime Numbers
DuodecimalBulletinIssue032-web.pdf
033-07
"Kin of the Golden Mean"; Cube Roots
DuodecimalBulletinIssue033-web.pdf
034-08
H. G. G. Robertson's Full Dozenal System
DuodecimalBulletinIssue034-web.pdf
041-09
G. Elbrow’s Full Dozenal System
DuodecimalBulletinIssue041-web.pdf
042-0X
Godjevatz Music Notation, Table of Prime Periods
DuodecimalBulletinIssue042-web.pdf
043-0E
Dozenal Slide Rule
DuodecimalBulletinIssue043-web.pdf
051-10
On the Graduation of Scales
DuodecimalBulletinIssue051-web.pdf
052-11
More’s Music Notation, Pythagorean Triangles
DuodecimalBulletinIssue052-web.pdf
061-12
John W. Nystrom’s full dozenal system
DuodecimalBulletinIssue061-web.pdf
062-13
“The Reverse Notation”, “Cyclic Sequences” “Do-Metric Standards”: Length
DuodecimalBulletinIssue062-web.pdf
063-14
Perry’s “Mathamerica”; “Do-Metric Standards” (Mass & Time)
DuodecimalBulletinIssue063-web.pdf
071-15
Logarithms, Conversion of large numbers, Do-Metric Dynamic Units
DuodecimalBulletinIssue071-web.pdf
081-16
Ecclesiastical Dozens, Constants, Right Triangles; Maps, Time, Stars, & the Calendar
DuodecimalBulletinIssue081-web.pdf
082-17
Dozenal Bibliography; Chronology < 1800; Math Tables
DuodecimalBulletinIssue082-web.pdf
091-18
“How We Began”; Do-Metric Thermal Units; Van Buskirk’s “Uncials”; Zirkel’s “Dozener”
DuodecimalBulletinIssue091-web.pdf
0X1-19
Adams’s Measure Reform; Fibonacci & Reciprocals; other number theoretical studies
DuodecimalBulletinIssue0a1-web.pdf
0E1-1X
Churchman’s “Do-Re-Mi” Interlingua nomenclature; time & angle conversions
DuodecimalBulletinIssue0b1-web.pdf
0E2-1E
About Herbert Spencer, Comprehensive Bulletin Index
DuodecimalBulletinIssue0b2-web.pdf
101-20
“Roman Dumerals”; Churchman’s “Doremic" System of Weights and Measures
DuodecimalBulletinIssue101-web.pdf
101-21
Essig’s “Douze Notre Dix Futur”; Henry Martyn Parkhurst’s work
DuodecimalBulletinIssue102-web.pdf
111-22
Reaction to Jean Essig; Acclaim for Parkhurst as dozenal pioneer; Beard’s “Time of Decision”
DuodecimalBulletinIssue111-web.pdf
112-23
Esperanto; Doremic Time; “Aversion to Arithmetic”
DuodecimalBulletinIssue112-web.pdf
121-24
Doremic Angular Measure; Bagley’s “Redivivus Reckoning” full dozenal system
DuodecimalBulletinIssue121-web.pdf
122-25
Valevsky’s dozenal metric system; Goodman’s thoughts on dozenal; bibliography supplement
DuodecimalBulletinIssue122-web.pdf
131-26
Birth of the DSGB; Comments on dozenal measurement units; Doremic Dimensions
DuodecimalBulletinIssue131-web.pdf
132-27
DSGB commentary; P. Andrews on measure; Table of powers of 12; Conversion methods
DuodecimalBulletinIssue132-web.pdf
141-28
Dozenal math club charts; Metric inches; Divisibility tests; Division from the right
DuodecimalBulletinIssue141-web.pdf
142-29
P. Andrews on time and distance; Bishop on money and measurement; Doremic surface measure
DuodecimalBulletinIssue142-web.pdf
151-2X
Dozenal Abacus; Doremic money, volume, mass; The “New Yorker” reports DSA meeting
DuodecimalBulletinIssue151-web.pdf
152-2E
The meter and English measures; Churchman’s comments: standards; Bulletin Index Vols. 10-15
DuodecimalBulletinIssue152-web.pdf
161-30
Palindromic Numbers; Linton on Abacus; Churchman’s Metron; Casting Out E;’s
DuodecimalBulletinIssue161-web.pdf
171-31
Patterns for El; Duodecimal Geometry; Beard’s “Duodecimal Perspectives”
DuodecimalBulletinIssue171-web.pdf
181-32
Etymology for Bases; “Let’s Not Go Metric”; Linton’s Dimensioning; Gilles’ weights & measure
DuodecimalBulletinIssue181-web.pdf
191-33
The Bruce Moon Issue: Decimal Currency; Conversion algorithm
DuodecimalBulletinIssue191-web.pdf
192-34
“Inches & Miles”; Modernize the metric system; First 5 dozen decimal powers of twelve
DuodecimalBulletinIssue192-web.pdf
1X0-35
Julian dates; New unit replacing knots; Simpler sums; Renaissance in arithmetic.
DuodecimalBulletinIssue1a0-web.pdf
1E1-36
Linton’s “Dimensioning Challenge”; The Hexadecimal Issue; Churchman’s calendar.
DuodecimalBulletinIssue1b1-web.pdf
1E2-37
Kothe’s “Chromatic Musical Scales and Notation” part 1; Math constants
DuodecimalBulletinIssue1b2-web.pdf
200-38
Cesium second; Krypton meter; Measurement in general; Kothe continued; George S. Terry
DuodecimalBulletinIssue200-web.pdf
210-39
Kothe’s music part 3; A dozenal computer; Accord on measure; Essig obituary
DuodecimalBulletinIssue210-web.pdf
220-3X
“Winchester Declarations”; Dozenal measurement (metronic system); Slide rules
DuodecimalBulletinIssue220-web.pdf
230-3E
Davies’ “A Duodecimal Calendar”; dismay over metric; Bulletin Index Vols. 16-23
DuodecimalBulletinIssue230-web.pdf
240-40
Julian dates on cover; Discussions of the “navinaut”; dozenal distances and time
DuodecimalBulletinIssue240-web.pdf
251-41
The Bell (*, #) numerals replace the “classic”; “Hawaii” temperature scale
DuodecimalBulletinIssue251-web.pdf
261-42
Relaunch; Malone’s “Simple Approach to Dozenal”; Minutes 1974, 1975
DuodecimalBulletinIssue261-web.pdf
271-43
Schiffman’s Group theoretic application of number 12; Minutes 1976, 1977
DuodecimalBulletinIssue271-web.pdf
272-44
G. Zirkel’s symbols article; DSA meeting in the national news
DuodecimalBulletinIssue272-web.pdf
273-45
“Symbols - a Plea for Unity; “Dozen Properties of Twelve”; Minutes 1978, 1979
DuodecimalBulletinIssue273-web.pdf
281-46
“How Do You Pronounce 32?”; Bagley’s “Deserved Oblivion”
DuodecimalBulletinIssue281-web.pdf
282-47
K. Camp Obituary; Calendar Reform; “Who We Are”: Anton Glaser
DuodecimalBulletinIssue282-web.pdf
283-48
Trigg’s “Cyclic Duodecimal Integers”; G. Zirkel’s Unambiguous notation; “Axiological Analysis”
DuodecimalBulletinIssue283-web.pdf
291-49
Duodecimal primes; “Who We Are”: Robert McPherson
DuodecimalBulletinIssue291-web.pdf
292-4X
Precision in converting fractions; Newhall’s dozenal essay; “Who”: Dr. Angelo Scordato
DuodecimalBulletinIssue292-web.pdf
293-4E
Bulletin Index Vols. 24-29
DuodecimalBulletinIssue293-web.pdf
2X1-50
Duodecimal palindromes; Reverse notation revisited; “Who We Are”: Dudley George
DuodecimalBulletinIssue2a1-web.pdf
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
Square integers; Dr. Rapoport’s Dozenal clock; Schiffman’s Fundamental Operations
DuodecimalBulletinIssue313-web.pdf
314-60
Bulletin Index Vols. 2X-31
DuodecimalBulletinIssue314-web.pdf
321-61
Index addenda; Paquette’s dozenal essay; Dr. Rapoport’s dozenal computer quiz
DuodecimalBulletinIssue321-web.pdf
322-62
Schiffman’s “Fundamental Operations”, part 2; “10;0 = One Dozen”; The communication age
DuodecimalBulletinIssue322-web.pdf
323-63
DSA Constitution and By-Laws; Trigg obituary; “2B or not 2B”
DuodecimalBulletinIssue323-web.pdf
331-64
P. D. Thomas; Newhall’s “Nu-Age Calendar”; Dr. Impagliazzo’s “Music, Scales, & Dozens” part 1
DuodecimalBulletinIssue331-web.pdf
332-65
“Music, Scales & Dozens” part 2; Trigg’s 2nd order dozenal digital root bracelets
DuodecimalBulletinIssue332-web.pdf
333-66
G. Zirkel’s “Binary Coded Digits”
DuodecimalBulletinIssue333-web.pdf
341-67
Schiffman’s survey of dozenal fractionals; Hammond’s acclaim for Binary Coded Digits
DuodecimalBulletinIssue341-web.pdf
342-68
Smith’s best base essay; History prof’s long hundred; Trigg’s prime palindromes
DuodecimalBulletinIssue342-web.pdf
343-69
Schiffman’s “Remarkable Prime Numbers”; Churchman’s “Metrons”; Scientific notation
DuodecimalBulletinIssue343-web.pdf
351-6X
Long hundreds; Earliest dozenal book; Schiffman’s “Superprimes”
DuodecimalBulletinIssue351-web.pdf
352-6E
Conversion to ten; Brost’s “Dyhexal”; Colwell’s dozenal essay; Hansen’s dozenal music
DuodecimalBulletinIssue352-web.pdf
361-70
Congruences in dozenal divisibility tests; Nu’s best base essay; Kapreker; factorials
DuodecimalBulletinIssue361-web.pdf
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
Evidence of metric unpopularity; nonsense; Patten’s Law (best base essay)
DuodecimalBulletinIssue3b2-web.pdf
401-80
DSA’s first website; Country’s “Numbers and Number Systems”; consumer preference
DuodecimalBulletinIssue401-web.pdf
402-81
Errors in Sumerian kingship terms; Churchman’s Doremic system reprint
DuodecimalBulletinIssue402-web.pdf
411-82
Schiffman’s congruences in base-16 divisibility tests; Kelly’s “Copy Book Wisdom”
DuodecimalBulletinIssue411-web.pdf
412-83
Metric Big Brother; Patten’s “Future of Counting and Measure”; Mathematica conversions
DuodecimalBulletinIssue412-web.pdf
421-84
Anti-metrication letters; Pythagorean triples
DuodecimalBulletinIssue421-web.pdf
422-85
Metric martyr’ loses; “How Metric is Europe?”
DuodecimalBulletinIssue422-web.pdf
431-86
“Almost Base Twenty”; “Dozenals in the Classroom”
DuodecimalBulletinIssue431-web.pdf
432-87
Whillock’s “In Defense of Natural Measures”; Dozenal calculator, SSNs; Prime repunits
DuodecimalBulletinIssue432-web.pdf
441-88
“Drastic Measures”; letters describing dozenal chemistry, watches, duodecades
DuodecimalBulletinIssue441-web.pdf
442-89
BMWA warns: sneak attack; English measures: scientific importance; “Irregular Dozenal Digits”
DuodecimalBulletinIssue442-web.pdf
451-8X
Punter’s dozenal calculator; “Some of Our Story”; “Eggsactly a Dozen” reprint
DuodecimalBulletinIssue451-web.pdf
452-8E
Reverse notation reprint; Metric trouble in Britain; The five dozenth Annual Meeting
DuodecimalBulletinIssue452-web.pdf
461-90
“Whence the Octothorpe”; Ternary computers & money; McClellan reprint
DuodecimalBulletinIssue461-web.pdf
462-91
Aspirant’s Test No. 1; Leubner’s dozenal terminology
DuodecimalBulletinIssue462-web.pdf
471-92
First DSA Website; Schiffman’s “The Most Appealing Integer” part 1; Aspirant’s Test 2
DuodecimalBulletinIssue471-web.pdf
472-93
Schiffman Part 2; (Rhombic) Dodecahedron; Whillock obituary; Tengwar numerals
DuodecimalBulletinIssue472-web.pdf
481-94
Proctor’s essay on alternative bases; “EU’s Metric obsession”
DuodecimalBulletinIssue481-web.pdf
482-95
Evans’ “Numbers Cheaper by the Dozen?”; On the name change of the DSA
DuodecimalBulletinIssue482-web.pdf
491-96
Evans’ essay part 2; Zirkel’s extension of Schumacher’s binary coded digits
DuodecimalBulletinIssue491-web.pdf
492-97
History of the DSA New Media and Digital Bulletin; Return to classic numerals
DuodecimalBulletinIssue492.pdf
4X1-98
History of the DSGB; Osburn’s Number base study; Clayton’s Dozenal nomenclature
DuodecimalBulletinIssue4a1.pdf
4X2-99
The Symbology Issue 1; Symbology Overview; Dozenal Numerals Feature; LaTeX Dozenal Displays
DuodecimalBulletinIssue4a2.pdf
4E1-9X
Digital Fractions; The Symbology Issue 2; Tools for Numeral Crafting; DozensOnline Digest
DuodecimalBulletinIssue4b1.pdf
4E2-9E
Dozenal Home Primes; Pronouncing Dozenals; Simon Stevin; Key Dozenal Fractions
DuodecimalBulletinIssue4b2.pdf
510-X0
Dozenal division of the circle; base X0
DuodecimalBulletinIssue501.pdf
511-X1
Systematic Dozenal Nomenclature and other nomenclature systems.
DuodecimalBulletinIssue511a.pdf
521-X2
Base Annotation Schemes
DuodecimalBulletinIssue521.pdf
531-X3
Metrologies
DuodecimalBulletinIssue531.pdf
541-X4
