Rana, yes. Know Ian Mills? This is supposed to be a folk list, it just that that subject got lost a couple of years ago. I learned my ray tansfer optics from electon spectroscopists before I found it in optics books, and if things work out right, I'll be using it again very soon. [Rectangular R-theta diagrams and such, but optical elements instead of electomagnetic fields] I'm going to be back into designing long path absorption cell of very low loss for a high resolution FTS IR spectrometer (maybe tomorrow, didn't get it all settled today, working with at least 3 spectroscopists that know Alan.) (My publications list is on my website-Mudcat's Links). I never had a paper with Alan. He was the 2nd to try to fit my CH3D data. I think I know where I can break the secular determinant near the middle now, so we only have to fit about 12 vibrational states at a time.

Early 70's? Did you run across two on sabbatical, Art Maki, or Walt Laferty. I forget when Jim Watson left Reading. I was the only one of my group that didn't do a sabbatical at Reading.