REISS, Bad Liebenwerda / (GDR) Germany              (1950)
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S C A L E S  of the  REISS   M A H O G A N Y   »DARMSTADT«
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Front Side        [ inverse / RED ]              Back Side
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( 0 ...  28 cm Ruler )

L         lgX
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K         X3
A         X2
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B         X2                             LL1     exp(0.01X)
[CI]      [1/X]                          LL2     exp(0.1X) 
C         X                              LL3     exp(X)
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D         X
[P]       [sqrt(1 - (0.1X)2)]
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S         sin(0.1X) ;  cos(0.1X)
T         tan(0.1X) ;  cot(0.1X)

R E M A R K S :                 (  1° = 60' ;   1' = 60" )
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The TRIGONOMETRIC SCALES are divided in  MINUTES & SECONDS

The acrylic "Window" on the back to read the LL-Scales was
missing and had to be home-made.  "MouseOver"  the cursor
to have a look at the detailed pictures ...

                   Historical Remarks ...
impressum:
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© C.HAMANN   http://public.BHT-Berlin.de/hamann   08/10/09