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TAke of Venice Talc in great pieces, as much as you please, make it red-hot in the {fire}, then quench it by cessing it into Oyl of Tartar; fire it again, and extinguish it as before. Do thus two or three times, and it will be throughly Calcined, so that you may crumble it into small Powder with your fingers; beat it in a Mortar, and pass it through a fine searse of Silk; what passeth not, Calcine it in a Crucible, and extinguish
again: It will be perfectly Calcined by ex∣tinctions in fair {water}, but then it will require ten or twelve Ignitions and extinctions.
Take your subtil Calx of Talc (which will be perfectly white) made either way, and put to it some distilled Vinegar to swim two or three fingers breadth over it, and put it to digest in very gentle heat eight or ten days, and you shall see a beautiful Oyl or Cream swim at the top of the Liquor, skim it off, and dry it with gentle {fire}, and it will be a saline substance, which put into a Blad∣der, and hang it in a Well near the {water}, but not to touch it, and in a few days it will resolve into a pure Oyl, which is Excellent for the Face. Or, with long remaining in a moist place, without putting it into distil∣led Vinegar, this Calx will resolve into Oyl: Try to extinguish the Talc in dew, &c. (Be sure that in all this Work you touch nothing with Iron.)