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 fuse a Heat through the body, is with success externally applied by Physicians and Chirurgeons in refrigerating Medicines.

But I leave the further Inquiry into the Operations of Medicines to Physicians, who may possibly, by what has been said, be assisted to compose the differences between some famous Writers about the temperament of some Medicines, as Mercury, Camphire, &c. which some will have to be cold, and others maintain to be hot; and shall onely offer by way of confirming, in general, that Potential Coldness is onely a Relative Quality, a few Particulars; the first whereof is afforded by comparing together the VI. and the VII. Experiment before going, (which have occasion'd this Digression about Potential Coldness;) since by them it seems probable, that the same thing may have it in reference to one body, and not to another, according to the disposition of the body it operates upon, or that ope-