KEUFFEL & ESSER, Hoboken, NewJersey / USA    SN = 29768     (1950)
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S C A L E S   of  the   » D O R I C «    DUPLEX      Model N9081-3
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Front Side              [ reverse-italics ]              Back Side
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[LL02]   [exp(-0.1X)]               [LL01]  [exp(-0.01X)]
[LL03]   [exp(-X)]                  K       X3 
DF       πX                         A       X2 
------------------------------------------------------------------
CF       πX                         B       X2
[CIF]    [1/πX]                     T       tan(0.1X) ; [cot(0.1X)]
[CI]     [1/X]                      ST      arc(0.01X)
C        X                          S       sin(0.1X) ; [cos(0.1X)]
------------------------------------------------------------------
D        X                          D       X 
LL3      exp(X)                     L       lgX
LL2      exp(0.1X)                  LL1     exp(0.01X)

R E M A R K S :
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This »DORIC« has the  SAME SCALE CONFIGURATION  as the K&E N4081-3

The SlideRule is made of white plastic. It came in a black leather
case. The leather case has a STICKER of the »ΔΣΦ« - Fraternity ...

The » Delta-Sigma-Phi « Fraternity  was established in 1899 at the
City College  of New York  and incorporated  with the  purpose  to
spread "the principles of friendship and brotherhood among college
men, without respect to race or creed."   ( cited from Wikipedia )

                      Historical Remarks ...
impressum:
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© C.HAMANN      http://public.BHT-Berlin.de/hamann        11/11/11