( ARISTO-Werke ) Dennert & Pape, Hamburg / Germany (1927) *********************************************************** » B U S I N E S S S Y S T E M D R . S T E N D E R « *) S C A L E S of the DENNERT & PAPE Model 43.28 =========================================================== Front Side [ inverse / RED ] Back Side =========================================================== ( 0 ... 25 cm Ruler ) D X ----------------------------------------------------------- C X G X [CI] [1/X] w.MARKS: ...,foot,inch Z 2,3,4,5 CF 3.6*X 5,6,7,8 ----------------------------------------------------------- DF 3.6*X E lgX = £ 0 ... 1.0 = Engl.Pound-Scale ----------------------------------------------------------- sh, d 0 ... 20 = Shilling, Penny-Scale R E M A R K S : =========================================================== This old model is made of mahogany with scales on celluloid veneer. The engravement »27« in the bottom means "1927". This »Business« slide rule has DF/CF-Scales folded at 3.6*X for Days-of-the-Year (and NOT at π). The Z-Scales on the slider's back are for calculating compound interest. Historical Remarks ... *) »System Dr.Stender« from D.v.JEZIERSKI's book (p.110) impressum: *********************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 01/28/08 |