> > I also hear that commercial Argon is now proposed for regulation > > as a "greenhouse gas". Last time I looked, the source of commercial > > Argon is the atmosphere... Then removing it from atmosphere and squeezing into steel bottles must be very green business:) --=20 KPL --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .