EUGEN DIETZGEN CO., Chicago, Illinois / USA           (1950)
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S C A L E S    o f   t h e    D I E T Z G E N    P O C K E T
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Front Side                                         Back Side
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( 0 ... 5" Ruler )

K         X3
A         X2 
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B         X2                    S      sin(0.01X); sin(0.1X)
[CI]      [1/X]                 L      lgX
C         X                     T      tan(0.1X)
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D         X

( 0 ... 12.5 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

S keyed to A ;  T keyed to D

The pocket slide rule came in a brown leather case.

                    Historical Remarks ...
impressum:
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© C.HAMANN    http://public.BHT-Berlin.de/hamann    11/23/09