Albert Nestler, Lahr in Baden / Germany               (1936)
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S C A L E S  of  the   NESTLER  » SCHUL - RIETZ «    Model 9
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Front Side                                         Back Side
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                                      ( 0 ...  29 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 ... 11 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 wooden economy model came in a blue cardboard case.

                   Historical Remarks ...
impressum:
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© C.HAMANN    http://public.BHT-Berlin.de/hamann    05/06/09