In a message dated 1/26/2010 12:15:07 P.M. Eastern Standard Time, [log in to unmask] writes: But it's definitely a gut job to remove the gypsum blocks, which surely have absorbed a lot of moisture. Yeah, like, why is this, scientifically? Why would wetting/drying (or is it just wetting?) destroy the bond of all the little teeny tiny particles? And how did they stick together to begin with? c -- **Please remember to trim posts, as requested in the Terms of Service** To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://listserv.icors.org/archives/bullamanka-pinheads.html>