GEBR. WICHMANN, Berlin / Germany (1940) *********************************************************** made by Albert Nestler, Lahr in Baden / Germany as Model 21 SCALES of the W I C H M A N N » DARMSTADT « Model 4477 =========================================================== 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)] REMARKS: =========================================================== The body, under the slider says »A.N.A.G.« , an indicator for made by »A.NESTLER AG«. The NESTLER Model »21« has the same scales, but the »4477« has screws and an acrylic cursor. The slide rule came in a black cardboard case. Historical Remarks ... impressum: *********************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 08/11/09 |