Hi All, I have ended most the moderation of most people. Hopefully, I will not need to step in again. Please keep it civil. Next time, I will likely just ban people permanently. Jeff Jeff Terry Assoc. Professor of Physics Life Science Bldg Rm 166 Illinois Institute of Technology 3101 S. Dearborn St. Chicago IL 60616 630-252-9708 terryj at iit.edu