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SCIENTIFIC  INSTRUMENTS  CO.
CIRCULAR  SLIDE  RULE   ( 3" /  8 cm Diameter )

                       Back     Manual     Front


SCIENTIFIC INSTRUMENTS CO., Berkeley, California / USA (1962)
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                                                Made in Japan

S C A L E S   of the  CIRCULAR SLIDE RULE  » SCI  Model 250 «
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Front Side                                          Back Side
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K     X3                                     D     X
A     X2                                     T1    tan(X)
D     X           outer circles              S1    sin(0.1X)
-------------------------------              T2    tan(0.1X)
C     X           inner circles              S2    sin(0.01X)
CI    1/X                                    T3    tan(0.01X)
L     lgX                                    ST    arc(0.01X)

                   Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann            12/24/06