KEUFFEL & ESSER, New York / USA SN = 121178 (1950) ***************************************************************** S C A L E S of the » P O C K E T « Model 4097_C ================================================================= Front Side [ inverse / RED ] Back Side ================================================================= ( 0 ... 5" Ruler ) A X2 ----------------------------------------------------------------- B X2 S sin(0.01X); sin(0.1X) [CI] [1/X] L lgX C X T tan(0.1X) ----------------------------------------------------------------- D X K X3 ( 0 ... 13 cm Ruler ) R E M A R K S : ( 1° = 60' ; 1' = 60" ) ================================================================= The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS S keyed to B ; T keyed to C/D The Celluloid Pocket-SR was a gift of the PACIFIC PUMPS, INC., as the inscription on the SR and its leather case reads. Historical Remarks ... impressum: ***************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 05/23/14 |