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FREDERICK POST   » 1452 »   ( 10" / 25 cm Scales )



FREDERICK POST CO., Chicago, Illinois / USA              (1970)
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                                         made by  HEMMI / Japan

S C A L E S   of the   P O S T   » UNIVERSAL «   Model 1452(WL)
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Front Side         [ inverse / RED ]                  Back Side
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( 0 ...  10" Ruler )
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A       X2
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B       X2                        S       sin(0.1X); sin(0.01X)
[CI]    [1/X]                     L       lgX
C       X                         T       tan(0.1X)
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D       X
K       X3
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( 0 ...  27 cm Ruler )

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

S keyed to A/B ;  T keyed to C/D

The bamboo sides are held together with a metal sheet.  On the
back side are tables with CONSTANTS  & US/Metric CONVERSIONS -
given as fractions.  The SR came in a brown leather case  with 
the  INSCRIPTION  » POST 1452 WL «  ( W = Wood;  L = Leather )
and an INSTRUCTION BOOKLET.

HEMMI introduced a year code, starts with  1950 = "A" ...  and
the month code starts with  Jan. = "A" ...   This  SR  has the
code "UF", means it is made in June 1970.

                 Historical Remarks to POST ...
                 Historical Remarks to HEMMI ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  11/11/11