KEUFFEL & ESSER, Hoboken, NewJersey / USA SN = 253471 (1955) **************************************************************** VERSION (B) S C A L E S of the » LOG LOG DUPLEX DECITRIG « Model 4081-3 ================================================================ Front Side [ inverse / RED ] Back Side ================================================================ [LL02] [exp(-0.1X)] [LL01] [exp(-0.01X)] [LL03] [exp(-X)] L lgX K X3 DF πX A X2 ---------------------------------------------------------------- CF πX B X2 [CIF] [1/πX] T tan(0.1X) ; [cot(0.1X)] [CI] [1/X] SRT arc(0.01X) C X S sin(0.1X) ; [cos(0.1X)] ---------------------------------------------------------------- D X D X LL3 exp(X) [DI] 1/X LL2 exp(0.1X) LL1 exp(0.01X) REMARKS: ================================================================ There are 2 different Versions » 4081-3 « in the Collection: Newer Version (B) ----------------- It has the same scales as the Models 4081-5 (50cm) and the "newer" 4181-1 (Pocket) Slide Rule in this collection. This model is made of mahogany with scales on celluloid veneer. The package included: A box, the slide rule in a brown leather case, a pamphlet "How to take care..." (with conversion tables) and a manual ( 126 pages / 1955 ). Older Version (A) Has an other scale configuration! Historical Remarks ... impressum: **************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 08/11/08 |