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STERLING   » PRECISION «  RULER
( 10" / 25 cm Scales )




STERLING PLASTIC CO., Mountainside, New Jersey / USA     (1970)
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                                                    VERSION (A)

SCALES  of  the   S T E R L I N G   »PRECISION«     (Model 587)
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Front Side      [ Scales on Slider in RED ]           Back Side
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( 0 ... 10"  RULER, 1/16" )

  A          X2
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[ B          X2                 S       sin(0.01X); sin(0.1X) ]
[ CI         1/X                L       lgX                   ]
[ C          X                  T       tan(0.1X)             ]
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  D          X
  K          X3

( 0 ... 10"  RULER, 0.050" )

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 ;  T keyed to D

To use the Back-Scales, the slider has to be turned.

This SLIDE RULER had no model number. It came in a soft plastic
case together with an  instruction sheet for the  » Model 587 «

There is a  V E R S I O N  (B)  in the collection
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with  S L I D E R   P R I N T S   I N   B L A C K

                 Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  09/10/09