I have been following with interest the discussion about parts per million and particle size, but I must not have received a posting. Richard's post refers to a laser, in terms that indicate something had previously been posted about it, but I never saw it. I have a Beck machine, which I have not yet put to use, partly bbecause of the uncertainties raised by the discussion. Could someone post about the laser to enlighten me -- and, I am sure -- some others. Thanks, George [email protected]
>From [email protected] Wed Jan 29 08:01:19 1997
