“PA” in “check the PA” = phenylacetic acid. See http://www.law.emory.edu/11circuit/aug95/93-2392.opa.html (“This case arises out of a scheme to transport phenylacetic acid (“PA”), a listed precursor chemical[1]controlled substance.” 21 C.F.R. § 1310.01 (emphasis in original). See also 21 U.S.C. § 802(34)(H); U.S.S.G. § 201.11, comment. (backg’d.); 21 C.F.R. § 1310.02. used in the manufacture of methamphetamine, from Florida to Oregon.") It’s NOT pH, as you originally responded, my dear Cecil. (Of course, your answer was from 1990, and the case referenced is from 1995, so… [grin])
By the way – thanks for this site, and your column; I read the first Straight Dope when I was about 9 and it made my life much richer!
Anyone else notice that in Cecil’s column he said, “Don’t ask silly questions”?
But, but, what are we supposed to do? I thought Cecil answered the weird, the arcane (and chemical moles are pretty frikkin’ arcane–I get astrological nodes of the moon, moles are REALLY strange), the bizarre, the well, silly?
I’m lost, now.
(I thought PA stood for “public address,” but unless there’s a sound system involved, that’s not likely.)