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LOGAREX  27403-II   ( 25 cm Scales )



LOGAREX               Ceske Budejovice / Czechoslovakia  (1960)
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S C A L E S   of  the      L O G A R E X               27403-II
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Front Side                                            Back Side
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( 0 ...  25 cm Ruler )

L         lgX
P         sqrt(1 - (0.1X)2)
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
S         sin(0.1X)
T         tan(0.1X)
ST        arc(0.01X)

( 1:25 Ruler )

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

The slide rule is made of plastic.  It came with no case, dirty
and cracked.  After cleaning and glued it looks interesting ...

                 Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  02/12/11