Albert Nestler, Lahr in Baden / Germany (1950) ***************************************************************** VERSION (B) S C A L E S of the NESTLER » DARMSTADT « Model 21 ================================================================= Front Side [ inverse / RED ] Back Side ================================================================= ( 0 ... 27 cm Ruler ) L lgX ----------------------------------------------------------------- K X3 A X2 ----------------------------------------------------------------- B X2 LL1 exp(0.01X) [CI] [1/X] LL2 exp(0.1X) C X LL3 exp(X) ----------------------------------------------------------------- D X [P] [sqrt(1 - (0.1X)2)] ----------------------------------------------------------------- S sin(0.1X) ; [cos(0.1X)] T tan(0.1X) ; [cot(0.1X)] R E M A R K S : ================================================================= This historic mahogany model is shown on top of the booklet » Einfuehrung in die Anwendung der NESTLER Rechenschieber RIETZ und DARMSTADT « (40 pages; with introduction and 106 calculating exercises). On the back side are instructions how to use the slide rule and tables with physical constants & conversions. There is a VERSION (A) in the collection: ----------------------------------------- The scales are glued and screwed on the mahogany body ... The RELATION between the lower-left and the lower-right HAIRLINES on the CURSOR is for CONVERSION 1 [kW] = 1.3596 [PS] Historical Remarks ... impressum: ***************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 11/11/11 |