From: Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com] Sent: Sunday, July 13, 1997 1:26 PM To: Tesla List Subject: Re: vacuum pump RWW wrote: snip >MilliTorr = 1/1000 mmHg > >Micron = 1/1,000,000 mmHg > >RWW My apologies Kristian. You are correct. One micron = one milliTorr. RWW