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FABER-CASTELL   DUPLEX   ( 25 cm Scales )
Have a look at a Newer Version (B)



A.W.Faber-Castell, Stein bei Nuernberg / Germany   (1956)
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                                              VERSION (A)

S C A L E S  of the FABER-CASTELL  » DUPLEX «  Model 2/82
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Front Side              [ inverse / RED ]       Back Side
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( 0 ... 25 cm Ruler )
                                   [LL03]   [exp(-X)]
T1     tan(0.1X) ; [cot(0.1X)]     [LL02]   [exp(-0.1X)]
T2     tan(X) ; [cot(X)]           [LL01]   [exp(-0.01X)]
A      X2                           K        X3
---------------------------------------------------------
B      X2                           K'       X3
[BI]   [100/X2]                     L        lgX
[CI]   [10/X]                       ST       arc(0.01X)
C      X                            CF       πX
---------------------------------------------------------
D      X                            DF       πX
[P]    [sqrt(1 - (0.1X)2)]          LL1      exp(0.01X)
S      sin(0.1X) ; [cos(0.1X)]      LL2      exp(0.1X)
                                    LL3      exp(X)
( 0 ... 10" Ruler )

R E M A R K S :  There are 2 Model 2/82 in the Collection
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Older Version (A)
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Production Code = 10_??
This slide rule came in a green cardboard case.

Newer Version (B)
Production Code = 1_??

This slide rule has NO RULERS on its body and scales in
other sequence. It is shielded in an acrylic box. It came
with an instruction booklet and a separate ruler with
physical constants and conversion factors in the box.

                 Historical Remarks ...
impressum:
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http://public.beuth-hochschule.de/~hamann        12/24/06