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KEUFFEL & ESSER   POCKET   4181-1
( 5" / 12.5 cm Scales )



KEUFFEL & ESSER, Hoboken, NewJersey / USA   SN = 006373  (1960)
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S C A L E S  of the  » LOG LOG DUPLEX DECITRIG «   Model 4181-1
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Front Side            [ inverse / RED ]               Back Side
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[LL02]   [exp(-0.1X)]           [LL01]  [exp(-0.01X)]
[LL03]   [exp(-X)]              L       lgX
                                K       X3 
DF       πX                     A       X2 
---------------------------------------------------------------
CF       πX                     B       X2
[CIF]    [1/πX]                 T       tan(0.1X) ; [cot(0.1X)]
[CI]     [1/X]                  SRT     arc(0.01X)
C        X                      S       sin(0.1X) ; [cos(0.1X)]
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D        X                      D       X 
LL3      exp(X)                 [DI]    1/X
LL2      exp(0.1X)              LL1     exp(0.01X)

REMARKS:
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The package included: A box, slide rule in a green leather case
and a (126 pages) manual for the 4081 & 4181 models.

                        Historical Remarks ...
impressum:
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© C.HAMANN  http://public.beuth-hochschule.de/~hamann  12/23/07