Albert Nestler, Lahr in Baden / Germany                  (1964)
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S C A L E S   of  the   N E S T L E R   » RIETZ «    Model 0235
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Front Side            [ inverse / RED ]               Back Side
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( 0 ...  56 cm Ruler )

K        X3
A        X2
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B        X2                                S         sin(0.1X)
[CI]     [1/X]                             ST        arc(0.01X)
C        X                                 T         tan(0.1X)
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D        X
L        lgX

( 0 ... 21 1/2 " Ruler )

R E M A R K S :                      (  1° = 60' ;   1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(")
 
This historic mahogany model has tables with physical constants
and conversions on its back side in German & English - together
with the blind print "164", means, it was made in January 1964.
It came in a blue cardboard case.

                    Historical Remarks ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      09/10/09