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STERLING   POCKET    ( 5" / 12.5 cm Scales )



STERLING PLASTIC CO., Mountainside, New Jersey / USA       (1965)
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SCALES  of  the   S T E R L I N G      Model 587      P O C K E T
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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)
CI         1/X                      L       lgX
C          X                        T       tan(0.1X)
-----------------------------------------------------------------
D          X
K          X3

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 POCKET SR was a gift from » THE DOW CHEMICAL COMPANY «. It
came in a soft plastic case together with an instruction sheet.

                    Historical Remarks ...
impressum:
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© C.HAMANN   http://public.beuth-hochschule.de/~hamann   12/04/10