GRAPHOPLEX, Paris / France (1965) ***************************************************************** S C A L E S of the GRAPHOPLEX » R I E T Z « Model 620 ================================================================= Front Side [ inverse / RED ] Back Side ================================================================= ( 0 ... 27 cm Ruler ) (K) B3 X3 (A) B2 X2 ----------------------------------------------------------------- (B) b2 X2 S sin(0.1X) [CI] a [1/X] S&T arc(0.01X) (C) b X T tan(0.1X) ----------------------------------------------------------------- (D) B X (L) L lgX R E M A R K S : ( 1° = 60' ; 1' = 60" ) ================================================================= The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS This attractive plastic SR has a table with physical constants & conversions on its back. It came in a dark-red cardboard case. The scale names printed on the SR are unusual - the common scale names are given in brackets left beside. Historical Remarks ... impressum: ***************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 07/11/11 |