But allowing this, 'tis
easie to reply, that still according to this very Reason, torrifi'd Sulphur
should afford more Blackness, than most other concretes, wherein that
Principle is confess'd to be far less copious. Also when I have expos'd
Camphire to the fire in Close Vessels, as Inflamable, and consequenly
(according to the Chymists) as Sulphureous a Body as it is, I could not by
such a degree of Heat, as brought it to Fusion, and made it Boyl in the
glass, impress any thing of Blackness, or of any other Colour, than its own
pure White, upon this Vegetable concrete. But what shall we say to Spirit
of Wine, which being made by a Chymical Analysis of the Liquor that affords
it, and being totally Inflamable, seems to have a full right to the title
they give it of _Sulphur Vegetabile_, & yet this fluid Sulphur not only
contracts not any degree of Blackness by being often so heated, as to be
made to Boyl, but when it burns away with an Actual flame, I have not found
that it would discolour a piece of White Paper held over it, with any
discernable soot. Tin also, that wants not, according to the Chymists, a
_Sulphur Joviale_, when throughly burned by the fire into a _Calx_, is not
Black, but eminently White.
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