( ARISTO-Werke ) Dennert & Pape, Hamburg / Germany (1927) *************************************************************** S C A L E S of the DENNERT & PAPE MANNHEIM Model D2.28 =============================================================== Front Side Back Side =============================================================== ( 0 ... 25 cm Ruler ) A X2 --------------------------------------------------------------- B X2 S sin(0.1X); sin(0.01X) 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 old model is made of mahogany with scales on celluloid veneer. The engravement »27« in the bottom means "1927" On its back side is a table with physical & engineer constants. Screws on the side allow adjustment of the slider's friction. Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 10/04/10 |