previous <<==>> next

WICHMANN - DARMSTADT   » 4477 «
( 25 cm Scales )



GEBR. WICHMANN, Berlin / Germany                     (1940)
***********************************************************
made by Albert Nestler, Lahr in Baden / Germany as Model 21

SCALES of the  W I C H M A N N   » DARMSTADT «   Model 4477
===========================================================
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)]

REMARKS:
===========================================================
The body, under the slider says  »A.N.A.G.« ,  an indicator
for made by  »A.NESTLER AG«.  The  NESTLER  Model »21«  has
the same scales, but the  »4477«  has screws and an acrylic
cursor.  The slide rule came in a black cardboard case.

                   Historical Remarks ...
impressum:
***********************************************************
http://public.beuth-hochschule.de/~hamann          08/11/09