HEMMI SLIDE RULE CO. LTD., Tokyo / Japan (1920) *************************************************************** S C A L E S of the Bamboo - Based H E M M I » Model-1 « =============================================================== Front Side Back Side =============================================================== ( 0 ... 27 cm Ruler ) A X2 --------------------------------------------------------------- B X2 S sin(0.01X); sin(0.1X) L lgX C X T tan(0.1X) --------------------------------------------------------------- D X ( 0 ... 28 cm Ruler ) 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 This SR came w. French Conversion-Tables on its back side, and in a black cardboard case with French Text on top. The CURSOR has one hairline and is unusual shaped - but easy to clean. Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 03/10/14 |