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ACU-MATH   1311-W   ( 10" / 25 cm Scales )



ACU-RULE MFG. CO., Mt.Olive. Illinois / USA              (1954)
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S C A L E S   of  the  » LOG LOG DECIMAL TRIG «    Model 1311-W
===============================================================
Front Side            [ inverse / RED ]               Back Side
===============================================================

[LL02]   [exp(-0.1X)]           [LL01]  [exp(-0.01X)]
[LL03]   [exp(-X)]              K       X3 
DF       πX                     A       X2 
---------------------------------------------------------------
CF       πX                     B       X2
[CIF]    [1/πX]                 T       tan(0.1X) ; [cot(0.1X)]
[CI]     [1/X]                  ST      arc(0.01X)
C        X                      S       sin(0.1X) ; [cos(0.1X)]
---------------------------------------------------------------
D        X                      D       X 
LL3      exp(X)                 L       lgX
LL2      exp(0.1X)              LL1     exp(0.01X)

R E M A R K S :
===============================================================
This model is made of MAHOGANY with scales on celluloid veneer.

According to the  " A C U - M A T H   E x p e r t s "  from the
International Slide Rule Museum  George E. Keane & Tom Dilatush
"This is the only wooden 1311 we have ever heard of ..."

On the right side of the slider is engraved  » US GOVERNMENT «.
The slide rule came with a leather case and a 16 page booklet
» Instructions for using TRIG & LOG LOG Slide Rules «  from
R.R.Middlemiss.  All in a red box with a label on its side:

      +-------------------------------------------------+
      |   1 only - ACU-MATH SR 1311W - 10" SLIDE RULE   |
      |            -----------------                    |
      |           LOG LOG DECIMAL TRIG                  |
      |       Stock number GM18-R-1000-225              |
      |        Type of Preservative, None               |
      |        Contract No. N155s - 19350               |
      |   ACU-RULE MFG.CO.              MT.OLIVE, ILL   |
      +-------------------------------------------------+

                     Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  06/21/07