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POST / HEMMI   » VERSALOG «  ( I )
( 10" / 25 cm Scales )



FREDERICK  P O S T  CO., Chicago, Illinois / USA              (1960)
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                                              made by  HEMMI / Japan

S C A L E S  of the  P O S T  » VERSALOG «  Bamboo-Based  Model 1460
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Front Side              [ inverse / RED or GREEN ]         Back Side
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[LL1]   exp(-X<-0.01 .. -0.1 >)     LL0     exp(X<0.001 .. 0.01>)
[LL2]   exp(-X<-0.1 ..  -1.0 >)     [LL0]   exp(-X<-0.001 .. -0.01>)
[LL3]   exp(-X<-1.0 .. -10.0 >)     K       X3
                                    DF      πX
--------------------------------------------------------------------
T       tan(0.1X) ; [cot(0.1X)]     CF      πX
ST      arc(0.1X) ; [sec(0.1X)]     [CIF]   [1/πX]
S       sin(0.1X) ; [cos(0.1X)]     [CI]    [1/X]
C       X                           C       X
--------------------------------------------------------------------
D       X                           D       X
LL3     exp(X<1.0 .. 10.0>)         R1      sqrt(X< ODD-No-Digits>)
LL2     exp(X<0.1  .. 1.0>)         R2      sqrt(X<EVEN-No-Digits>)
LL1     exp(X<0.01 .. 0.1>)         L       lgX

REMARKS:
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This scale design is referred in the literature as  » VERSALOG (I) «

The SR came in a black fiber case  with a genuin leather flap.  The
case can be clipped  on the user's belt - typical  for the USA:  As
seen in the "Western Movies" ready for a "quick draw".

HEMMI introduced a year code, starts with  1950 = "A" ... 
and the month code starts with  Jan. = "A" ...  This slide
rule has the code "KJ", means it is made in October 1960.

                   Historical Remarks to POST ...
                   Historical Remarks to HEMMI ...
impressum:
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© C.HAMANN    http://public.beuth-hochschule.de/~hamann     08/12/09