KEUFFEL & ESSER, New York / USA                      (1928)
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S C A L E S  of  the  K&E  » BEGINNER'S «  Model 4058 C & W
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Front Side                                        Back Side
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A       X2
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B       X2                    S       sin(0.01X); sin(0.1X)
                              L       lgX
C       X                     T       tan(0.1X)
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D       X

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

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

These SRs are made of solid wood. The scales of MODEL_C are
printed direct on wood - the surface of  MODEL_W is painted
white with black printed scales. MODEL_C came with a "home-
made" CURSOR  and without case. On both SR's back sides are
conversion tables and mathematical constants.  MODEL_W came
in a black artificial leather case  and with a User's Guide
»  ELEMENTARY INSTRUCTIONS FOR OPERATING THE SLIDE RULE  «.
The booklet's copyright was 1928.

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