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REISS - PROGRESS   ( 25 cm Scales )



REISS, Bad Liebenwerda / (GDR) Germany                    (1968)
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SCALES of the REISS LIGHT METAL  » P R O G R E S S «  Model 3223
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Front Side             [ inverse / RED ]               Back Side
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A       X2                          T1     tan(0.1X)
DF      πX                          T2     tan(X)
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CF      πX                          LL1    exp(0.01X)
[CI]    [1/X]                       LL2    exp(0.1X)
C       X                           LL3    exp(X)
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D       X                           D      X
L       lgX                         S      sin(0.1X) ; cos(0.1X)

R E M A R K S :                       (  1° = 60' ;   1' = 60" )
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The TRIGONOMETRIC SCALES  are divided in MINUTES(') & SECONDS(")

This beautiful aluminum slide rule came in a blue plastic cover
together with an instruction book.

Historical Remarks ...

Remarkable is (on the right lower corner) »GERMANY«  (NOT »DDR«)
 
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann   03/23/07