EUGEN DIETZGEN CO., Chicago, Illinois / USA           (1950)
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SCALES  of the  D I E T Z G E N   » NATIONAL «    Model 1767
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                                          ( one-sided only )
   K       X3
   S       sin(0.01X); sin(0.1X)
   A       X2
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   B       X2
   CI      1/X 
   C       X
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   D       X
   T       tan(0.1X)
   L       lgX 

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

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