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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
=================================================================
Front Side         [ inverse / RED ]                    Back Side
=================================================================
( 0 ...  27 cm Ruler )

L        lgX
-----------------------------------------------------------------
K        X3
A        X2
-----------------------------------------------------------------
B        X2                                  LL1     exp(0.01X)
[CI]     [1/X]                               LL2     exp(0.1X)
C        X                                   LL3     exp(X)
-----------------------------------------------------------------
D        X
[P]      [sqrt(1 - (0.1X)2)]
-----------------------------------------------------------------
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 ...

 

The RELATION between the lower-left and the lower-right HAIRLINES
on the CURSOR is for  CONVERSION   1 [kW]  = 1.3596 [PS]

Historical Remarks ...

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