ACU-RULE MFG. CO., Mt.Olive. Illinois / USA (1954) *************************************************************** S C A L E S of the » LOG LOG DECIMAL TRIG « Model 1311-W =============================================================== Front Side [ inverse / RED ] Back Side =============================================================== [LL02] [exp(-0.1X)] [LL01] [exp(-0.01X)] [LL03] [exp(-X)] K X3 DF πX A X2 --------------------------------------------------------------- CF πX B X2 [CIF] [1/πX] T tan(0.1X) ; [cot(0.1X)] [CI] [1/X] ST arc(0.01X) C X S sin(0.1X) ; [cos(0.1X)] --------------------------------------------------------------- D X D X LL3 exp(X) L lgX LL2 exp(0.1X) LL1 exp(0.01X) R E M A R K S : =============================================================== This model is made of MAHOGANY with scales on celluloid veneer. According to the " A C U - M A T H E x p e r t s " from the International Slide Rule Museum George E. Keane & Tom Dilatush "This is the only wooden 1311 we have ever heard of ..." On the right side of the slider is engraved » US GOVERNMENT «. The slide rule came with a leather case and a 16 page booklet » Instructions for using TRIG & LOG LOG Slide Rules « from R.R.Middlemiss. All in a red box with a label on its side: +-------------------------------------------------+ | 1 only - ACU-MATH SR 1311W - 10" SLIDE RULE | | ----------------- | | LOG LOG DECIMAL TRIG | | Stock number GM18-R-1000-225 | | Type of Preservative, None | | Contract No. N155s - 19350 | | ACU-RULE MFG.CO. MT.OLIVE, ILL | +-------------------------------------------------+ Historical Remarks ... impressum: *************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 06/21/07 |