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NESTLER   POCKET   Model  12d
( 15 cm Scales )



Albert Nestler, Lahr in Baden / Germany              (1912)
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SCALES  of  the  NESTLER  P O C K E T  RIETZ  » Model 12d «
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Front Side                                        Back Side
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( 0 ...  16 cm Ruler )

A     X2
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B     X2                        S     sin(0.01X); sin(0.1X)
    ( 18 ... 34 cm Ruler )      L     lgX
C     X                         T     tan(0.1X)
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D     X

( 0 ... 18 cm Ruler )

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

S keyed to A/B ;  T keyed to C/D

This old model is made of mahogany with scales on celluloid
veneer. Under the slider is a continuous RULER on the body.
On the back side of the slide rule is a table with physical
constants. The cursor has a magnifier.  The slide rule came
in a black cardboard case.

                   Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann          04/13/07