previous <<==>> next

KEUFFEL & ESSER   4158 / K-12_Prep   ( 10" / 25 cm Scales )



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 SR-Body is made of white/green/white plastic layers.
It came in a green soft plastic case with the booklet
» Learning to Use the Slide Rule - Step-By-Step, Easy ... «

                    Historical Remarks ...
impressum:
************************************************************
© C.HAMANN    http://public.BHT-Berlin.de/hamann    12/14/08