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NESTLER - DARMSTADT ( 25 cm Scales )
Albert Nestler, Lahr in Baden / Germany (1950)
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VERSION (B)
S C A L E S of the NESTLER » DARMSTADT « Model 21
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Front Side [ inverse / RED ] Back Side
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( 0 ... 27 cm Ruler )
L lgX
-----------------------------------------------------------------
K X3
A X2
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B X2 LL1 exp(0.01X)
[CI] [1/X] LL2 exp(0.1X)
C X LL3 exp(X)
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D X
[P] [sqrt(1 - (0.1X)2)]
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S sin(0.1X) ; [cos(0.1X)]
T tan(0.1X) ; [cot(0.1X)]
R E M A R K S :
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This historic mahogany model is shown on top of the booklet
» Einfuehrung in die Anwendung der NESTLER Rechenschieber RIETZ
und DARMSTADT « (40 pages; with introduction and 106 calculating
exercises). On the back side are instructions how to use the
slide rule and tables with physical constants & conversions.
There is a VERSION (A) in the collection:
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The scales are glued and screwed on the mahogany body ...
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The RELATION between the lower-left and the lower-right HAIRLINES
on the CURSOR is for CONVERSION 1 [kW] = 1.3596 [PS]