ACU-RULE MFG. CO., Mt.Olive. Illinois / USA (1965) *************************************************************** SCALES of the » ACU-MATH MANNHEIM TYPE « Model 500 =============================================================== Front Side Back Side =============================================================== S sin(0.01X); sin(0.1X) Conversion Tables K X3 together with its A X2 SR-Settings --------------------------------------------------------------- B X2 Fractions CI 1/X & C X Decimal Aequivalents --------------------------------------------------------------- D X Trigonometric L lgX Formulas & T tan(0.1X) Relations R E M A R K S : ( 1° = 60' ; 1' = 60" ) =============================================================== The TRIGONOMETRIC SCALES are divided in MINUTES(') & SECONDS(") S keyed to A/B ; T keyed to C/D The metal ends of Model 500 allow to adjust the plastic body. The SR came in a brown leather case. Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 08/11/09 |