Albert Nestler, Lahr in Baden / Germany              (1912)
***********************************************************

SCALES  of  the  NESTLER  P O C K E T  RIETZ  » Model 12d «
===========================================================
Front Side                                        Back Side
===========================================================
( 0 ...  16 cm Ruler )

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

( 0 ... 18 cm Ruler )

R E M A R K S :                  (  1° = 60' ;   1' = 60" )
===========================================================
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:
***********************************************************
© C.HAMANN   http://public.BHT-Berlin.de/hamann    04/13/07