REISS, Bad Liebenwerda / (GDR) Germany (1968) **************************************************************** SCALES of the REISS LIGHT METAL » P R O G R E S S « Model 3223 ================================================================ Front Side [ inverse / RED ] Back Side ================================================================ A X2 T1 tan(0.1X) DF πX T2 tan(X) ---------------------------------------------------------------- CF πX LL1 exp(0.01X) [CI] [1/X] LL2 exp(0.1X) C X LL3 exp(X) ---------------------------------------------------------------- D X D X L lgX S sin(0.1X) ; cos(0.1X) R E M A R K S : ( 1° = 60' ; 1' = 60" ) ================================================================ The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(") This beautiful aluminum slide rule came in a blue plastic cover together with an instruction book. Historical Remarks ... Remarkable is (on the right lower corner) »GERMANY« (NOT »DDR«) impressum: **************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 03/23/07 |