Weird, I read that article yesterday in preparation for the dye stuff I'm doing, since salt seems to be used in conjuction with alum sometimes when you use it as a mordant, and also when you use alum + salt to taw leather, which I'm thinking of throwing in as an alternative to using bark for tanning (once tree processing can produce bark). I guess alum comes from heat-treating/washing alunite, though I read things about romans supposedly using volcanic vents at the mining site and so on... perhaps the kiln is in order for dwarves. Alum can also be used as a styptic to stop minor bleeding, though I doubt that'll be much use since it seems to be mainly for things like shaving cuts.
Of course, salt is more important as a preservative... but that means making the food in your stockpile rot too? I wonder if that's too harsh.
Also -- was wool-wax (wool-grease/lanolin) actually used for anything back in the day (as an emollient/ointment)? I couldn't find anything that wasn't PR crap from cosmetic companies. The reason I'm curious is because wool, as a common precursor to yarn, needs to be washed first (often with soap, which could be used for this) or the dye won't take to the material, and the wool-wax/lanolin/wtvr is a byproduct of that which is now used in cosmetics/ointments.
[ October 07, 2006: Message edited by: Toady One ]