KEUFFEL & ESSER, New York / USA (1928) *********************************************************** S C A L E S of the K&E » BEGINNER'S « Model 4058 C & W =========================================================== Front Side Back Side =========================================================== A X2 ----------------------------------------------------------- B X2 S sin(0.01X); sin(0.1X) L lgX C X T tan(0.1X) ----------------------------------------------------------- D X R E M A R K S : ( 1° = 60' ; 1' = 60" ) =========================================================== The TRIGONOMETRIC SCALES are in MINUTES(') & SECONDS(") S keyed to A/B ; T keyed to C/D These SRs are made of solid wood. The scales of MODEL_C are printed direct on wood - the surface of MODEL_W is painted white with black printed scales. MODEL_C came with a "home- made" CURSOR and without case. On both SR's back sides are conversion tables and mathematical constants. MODEL_W came in a black artificial leather case and with a User's Guide » ELEMENTARY INSTRUCTIONS FOR OPERATING THE SLIDE RULE «. The booklet's copyright was 1928. Historical Remarks ... impressum: *********************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 08/09/08 |