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REISS   [ TRO ]   POCKET   ( 12.5 cm Scales )



 


REISS, Bad Liebenwerda / (GDR) Germany                    (19??)
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SCALES   of  the   R E I S S  [ TRO ]  P O C K E T     » RIETZ «
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Front Side           [ inverse / RED ]                 Back Side
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[ 0 ...  13 cm Ruler ]

A       X2
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B       X2                           S     sin(0.01X); sin(0.1X)
[CI]    [1/X]                        ST    arc(0.01X)
C       X                            T     tan(0.1X)
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D       X
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/B ;  T keyed to C/D

The SR is made of  PLASTIC-LAYERS  as shown in the last picture.
It came in a green plastic case with prints  »REISS« and  »TRO«.
The printed scales are faded on the right side. The SR came w/o
cursor - Lucky: A CURSOR of a Faber-Castell Pocket-SR fits well.

                       Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann   09/11/16