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NESTLER   POCKET   Model  22R
( 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 22R «
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Front Side            [ inverse / RED ]               Back Side
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( 0 ...  16 cm Ruler )

K       X3
A       X2
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B       X2                                     S      sin(0.1X)
[CI]    [1/X]      ( 18 ... 34 cm Ruler )      ST    arc(0.01X)
C       X                                      T      tan(0.1X)
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D       X
L       lgX

( 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

This historic SR  is made of mahogany  with scales on celluloid
veneer.  Under  the slider  is a continuous  RULER on  the body
( 18 ... 34 cm )  On the back side of the slide rule is a table
with physical constants.  The cursor has 3 hairlines. The slide
rule came in a black cardboard case.

                   Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  09/24/11