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From: berryh@udel.edu (John Berryhill)
Newsgroups: sci.electronics
Subject: Re: Vacuum Terminology
Message-ID: <9505@nigel.udel.EDU>
Date: 29 Jan 90 18:26:35 GMT
References: <108800006@uxa.cso.uiuc.edu>
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Reply-To: berryh@udel.edu (John Berryhill)
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In article <108800006@uxa.cso.uiuc.edu> smlg1015@uxa.cso.uiuc.edu writes:
>
>In particular, 10E-7 particles per cm3 corresponds to which category?
>This is said to be the density of an interstellar dust cloud.  What's
>the best that can be achieved in the lab?

I think the record is in the low 10^-9 mm of Hg range.
--
							      John Berryhill
"Boil that dust speck!"                    143 King William, Newark DE 19711