Thus Silver and Tin separately dissolv'd in _Aqua Fortis_, will
the one Praecipitate it self, and the other be Praecipitated by common
Salt-water into a White _Calx_, and so will Crude Lead and Quicksilver
first dissolv'd likewise in _Aqua Fortis_. The like _Calx_ will be afforded
as I have try'd by a Solution of that shining Mineral Tinglass dissolv'd in
_Aqua Fortis_, and Praecipitated out of it; and divers of these _Calces_ may
be made at least as Fair and White, if not better Colour'd, if instead of
Oyl of _Tartar_ they were Praecipitated with Oyl of _Vitriol_, or with
another Liquor I could Name. Nay, that Black Mineral _Antimony_ it self,
being reduc'd by and with the Salts that concurr to the Composition of
common Sublimate, into that Cleer though Unctuous Liquor that Chymists
commonly call Rectifi'd Butter of _Antimony_, will by the bare affusion of
store of Fair Water be struck down into that Snow-white Powder, which when
the adhering Saltness is well wash'd off, Chymists are pleas'd to call
_Mercurius Vitae_, though the like Powder may be made of _Antimony_, without
the addition of any _Mercury_ at all. And this Lactescence if I may so call
it, does also commonly ensue when Spirit of Wine, being Impregnated with
those parts of Gums or other Vegetable Concretions, that are suppos'd to
abound with Sulphureous Corpuscles, fair Water is suddenly pour'd upon the
Tincture or Solution.
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