PICKETT, Alhambra, California / USA                       (1949)
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S C A L E S  of the  » ALL METAL SIMPLEX TRIG «        Model 902
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Front Side                                             Back Side
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K                          X3            Explanations of how to
A                          X2            use a slide rule...
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B                          X2            Explanations of how to
S        sin(0.1X); cos(0.1X)            find Sine or Tangent
T           tan(X); tan(0.1X)               &
C                           X            how to read Scales
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D                           X            Examples of how to find
L                         lgX            Squares, Cubes, Roots

REMARKS:
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This old model was made of magnesium alloy.  It was oxidized and
powdery on the edges and the slider was locked.  For restoration
it had to be disassembled, the oxidized layers scratched away
and VASELINE was applied to all sliding parts.

                     Historical Remarks ...
impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann      12/14/06