t 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. And I remember that very lately I did, for Tryal
sake, on a Tincture of _Benjamin_ drawn with Spirit of Wine, and brought to
be as Red as Blood, pour some fair Water, which presently mingling with the
Liquor, immediately turn'd the whole Mixture White. But if such Seeming
Milks be suffer'd to stand unstirr'd for a convenient while, they are wont
to let fall to the bottome a Resinous Substance, which the Spirit of Wine
Diluted and Weakned by the Water pour'd into it was unable to support any
longer. And something of Kin to this change of Colour in Vegetables is
that, which Chymists are wont to observe upon the pouring of Acid Spirits
upon the Red Solution of _Sulphur_, dissolv'd in an Infusion of Pot-ashes,
or in some other sharp _Lixivium_, the Praecipitated _Sulphur_ before it
subsides, immediately turning the Red Liquor into a White one. And other
Examples might be added of this way of producing Whiteness in Bodyes by
Praecipitating them out of the Liquors wherein they have been Dissolv'd; but
I think it may be more usefull to admonish you, _Pyrophilus_, that this
observation admits of Restrictions, and is not so Universal, as by this
time perhaps you have begun to think it; For though most Praecipitated
Bodyes are White, yet I know some that are not; For Gold Dissolv'd in _Aqua
Regis_, whether you Praecipitate it with Oyl of _Tartar_, or with Spirit of
_Sal Armoniack_, will not afford a White but a Yellow _Calx_. _Mercury_
also though reduc'd into Sublimate, and Praecipitated with Liquors abounding
with Volatile Salts, as the Spirits drawn from Urine, Harts-horn, and other
Animal substances, yet will afford, as we Noted in our first Experiment
about Whiteness and Blackness, a White Praecipitate, yet with some Solutions
hereafter to be mentioned, it will let fall an Orange-Tawny Powder. And so
will Crude _Antimony_, if, being dissolv'd in a strong Lye, you pour (as
farr as I remember) any Acid Liquor upon the Solution newly Filtrated,
whilst it is yet Warm. And if upon the Filtrated Solution of _Vitriol_, you
pour a Solution of one of these fix'd Salts, there will subside a Copious
substance, very farr from having any Whiteness, which the