On Nov 17, 2006, at 12:00 PM, John Richardson wrote: > Hello, > > I have 2 wooden antique slide rules with leather cases.....Ha, Ha..... > > Boy, do I love these threads.... * In addition to my K&E, I also have a 10-inch Japanese Sun Hemmi Model 153 Electrical Engineer's Slide Rule, made of bamboo, which I bought on the streets of Tokyo in 1950. I paid about $3.00 for it. It got me all the way through a BS in EE at Georgia Tech and an MS in EE at Stanford. It has all the usual scales, plus a set of very accurate vector scales for engineering, for example: 3 + j4 = 5 @ arccos (0.6) It does complex algebra routinely. BTW, I'm not completely a Luddite. I also have an Intel iMac with 1GB RAM, about 750 GB of HD, System X 10.4.8 and a good fast internet connection. Cheers! earle *