PICKETT & ECKEL, Chicago, Illinois / USA (1960) ****************************************************************** SCALES of the » ALL METAL POWER LOG EXPONENTIAL « Model N3-ES ================================================================== Front Side [ inverse / RED ] Back Side ================================================================== LL0 exp(+0.001X .. +0.01X); sqrt(X< ODD-No-Digits >) [LL0] [exp(-0.001X .. -0.01X)] sqrt(X< EVEN-No-Digits >) LL1 exp(+0.01X .. +0.1X); K X3 [LL1] [exp(-0.01X .. -0.1X)] A X2 DF πX ------------------------------------------------------------------ B X2 CF πX ST arc(0.01X) [CIF] [1/πX] S sin(0.1X); [cos(0.1X)] T1 tan(0.1X) LN lnX T2 tan(X) L lgX [CI] [1/X] [CI] [1/X] C X C X ------------------------------------------------------------------ D X D X [DI] [1/X] LL2 exp(+0.1X .. +X); 3rdRoot(X< 1;4;7 Digits,.. >) [LL2] [exp(-0.1X .. -X)] 3rdRoot(X< 2;5;8 Digits,.. >) LL3 exp(+X .. +10X); 3rdRoot(X< 3;6;9 Digits,.. >) [LL3] [exp(-X .. -10X)] R E M A R K S : ================================================================== It came in a heavy-used leather case - but the aluminum slide rule was in good conditions. With its 32 scales it belongs to the most »loaded« slide rules! This slide rule has the typical "Pickett-Yellow" body: The "-ES" in the model number means "Eye-Saver"; Models with the "-T"-Ext. (for "Traditional") have a white body. Historical Remarks ... impressum: ****************************************************************** © C.HAMANN http://public.BHT-Berlin.de/hamann 04/04/16 |