HOEHLER, Hohenneuendorf / (East-)Germany                 (1960)
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S C A L E S   of  the     » H H «     M E D I U M  -  R I E T Z
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Front Side              [ inverse / RED ]             Back Side
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( 0 ...  20 cm Ruler )

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

( 1:25 x 100  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/B ;  T keyed to C/D

The body of this »RIETZ« in MEDIUM SIZE is made of one piece
of wood.  The scales are printed on celluloid veneer.  A table
with the »HH« logo and physical constants is on the back side.
The case is made of oilcloth - a material typical for the '50s.

                    Historical Remarks ...
impressum:
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© C.HAMANN     http://public.BHT-Berlin.de/hamann      02/16/08