<rgb> This is a complete message from rgb. </rgb> (Just so you could say you've read at least one... see this month's CWM:-) rgb -- Robert G. Brown http://www.phy.duke.edu/~rgb/ Duke University Dept. of Physics, Box 90305 Durham, N.C. 27708-0305 Phone: 1-919-660-2567 Fax: 919-660-2525 email:rgb at phy.duke.edu