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REISS - POCKET - DARMSTADT
( 12.5 cm Scales )



REISS, Bad Liebenwerda / (GDR) Germany              (1960)
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SCALES  of the  REISS (DECELITH)  P O C K E T  »DARMSTADT«
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Front Side        [ inverse / RED ]              Back Side
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( 0 ...  15 cm Ruler )

K         X3
A         X2
DF        πX
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CF        πX                            LL1     exp(0.01X)
[CIF]     [1/πX]                        LL2     exp(0.1X)
[CI]      [1/X]                         LL3     exp(X)
C         X                             L       lgX
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D         X
[P]       [sqrt(1 - (0.1X)2)]
S         sin(0.1X)
T         tan(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

To use the LL-Scales, the slider has to be turned.

Historical Remarks ...

The leather case has a print on top:  » S I M S O N «

impressum:
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http://public.beuth-hochschule.de/~hamann         04/23/07