PC PH tester?

I was wondering if anyone has a copy of an artical about using your PC for a PH
tester.  I have seen references to this artical but my husband and I have been
unable to find it.  I was hoping that someone on this group might have a copy
or referances to it.

Thanks in advance!

Please reply to Newt at vax1_mankato.msus.edu

Trice L. Hundstad               | Mankato State University
Newt at vax1_mankato.msus.edu      | Mankato, MN USA
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