ACU-RULE MFG. CO., Mt.Olive. Illinois / USA              (1965)
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SCALES  of  the   » ACU-MATH MANNHEIM TYPE «          Model 500
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Front Side                                            Back Side
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S       sin(0.01X); sin(0.1X)              Conversion Tables
K       X3                                 together with its
A       X2                                 SR-Settings
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B       X2                                 Fractions
CI      1/X                                &
C       X                                  Decimal Aequivalents
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D       X                                  Trigonometric
L       lgX                                Formulas  &
T       tan(0.1X)                          Relations

R E M A R K S :                      (  1° = 60' ;   1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(")

S keyed to A/B  ;   T keyed to C/D

The metal ends of Model 500 allow to adjust the plastic body.
The SR came in a brown leather case.

                     Historical Remarks ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      08/11/09