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SCIENTIFIC  INSTRUMENTS  CO.
LOG-LOG DECATRIG
( 10" / 25 cm Scales )



SCIENTIFIC INSTRUMENTS CO., Berkeley, California / USA          (1961)
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SN = 90133                            Made in Japan  by  RELAY / RICOH

S C A L E S   of   the     LOG-LOG DECATRIG                 Model 1510
======================================================================
Front Side                 [ inverse / RED ]                 Back Side
======================================================================

[LL1]   [exp(-0.01X)]                  [LL0]   [exp(-0.001X)]
[LL2]   [exp(-0.1X)]                   L       lgX
[LL3]   [exp(-X)]                      K       X3
DF      πX                             A       X2
----------------------------------------------------------------------
CF      πX                             B       X2
[CIF]   [1/πX]                         S       sin(0.1X) ; [cos(0.1X)]
                                       ST      arc(0.01X)
[CI]    [1/X]                          T       tan(0.1X) ; [cot(0.1X)]
C       X                              C       X 
----------------------------------------------------------------------
D       X                              D       X
LL3     exp(X)                         [DI]    1/X
LL2     exp(0.1X)                      [P]     [sqrt(1 - (0.1X)2)]
LL1     exp(0.01X)                     LL0     exp(0.001X)

R E M A R K S :
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This model is made of bamboo  with scales on celluloid veneer.  Cursor
windows have the scale symbols engraved.  The SR has a "MADE IN JAPAN"
imprint and came in a brown leather case with a clip and SIC-Logo.

Historical Remarks ...

impressum:
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© C.HAMANN     http://public.beuth-hochschule.de/~hamann      07/11/11