KEUFFEL & ESSER, New York / USA                       (1961)
************************************************************

S C A L E S  of  the   » K & E   K - 12 Prep «    Model 4158
============================================================
                                       ( one-sided only )
   K       X3
   A       X2
------------------------------------------------------------
   B       X2
   S       sin(0.1X); sin(0.01X)
   CI      1/X
   T       tan(0.1X)
   C       X
------------------------------------------------------------
   D       X
   L       lgX

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

S keyed to B ;  T keyed to C

The body is made of green plastic with scales on celluloid
veneer. It came in a green soft plastic case with a booklet
» Learning to Use the Slide Rule - Step-By-Step, Easy ... «

Historical Remarks ...

************************************************************
© C.HAMANN    www.tfh-berlin.de/~hamann    impressum   12/12/08