Seal of the DSA
Join Us!
Dozenal Society of America
Promoting base twelve and alternative base mathematics
Support the DSA
Donate
Follow Us
Icon for DSA's Twitter Icon for DSA's Facebook Icon for DSA's RSS
Share This Page
Icon for sharing via Twitter Icon for sharing via Facebook Icon for sharing via email
The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

Duodecimal Bulletin: Pictorial Synopsis

Below are links showing the various stages of the development of the Bulletin, in groups of a dozen issues. Each is preceded by a brief summation of the unquade by our current editor, Michael deVlieger, who offers a fascinating insight into the history of our Society. It is interesting to consider this aspect along with the fascinating mathematical considerations that are contained in these pages.

Link to First Bulletin Unquade

00-0E

1161-1164

Link to Second Bulletin Unquade

10-1E

1165-116E

Link to Third Bulletin Unquade

20-2E

1170-1175

Link to Fourth Bulletin Unquade

30-3E

1176-1184

Link to Fifth Bulletin Unquade

40-4E

1185-1194

Link to Sixth Bulletin Unquade

50-5E

1195-1198

Link to Seventh Bulletin Unquade

60-6E

1198-11X0

Link to Eighth Bulletin Unquade

70-7E

11X1-11X6

Link to Ninth Bulletin Unquade

80-8E

11X7-11E0

Link to Tenth Bulletin Unquade

90-9E

11E1-11E7

Link to Eleventh Bulletin Unquade

X0-XE

11E7-

© 11E9-1205 (decimal 2013-2021). The Dozenal Society of America. Contact Us
Creative Commons License
This website and the documents on it are licensed under a Creative Commons Attribution 3.0 Unported License.
Numeration on this site is in dozenal (also called duodecimal, or base twelve), using "X" for ten and "E" for eleven.
0 1 2 3 4 5 6 7 8 9 X E 10 11 12 13 14 15 16 17 18 19 1X 1E 20 21 22...
PDF documents may use a Dwiggins stylized "X" and "E" or the Pitman inverted "2" and "3".
The Humphrey point, or semicolon, is used for fractional parts; e.g., "0;6 = 0.5."