First, _that the Air_ in which we live, move, and breath, and which
encompasses very many, and cherishes most bodies it encompasses, that this
Air is the _menstruum_, or universal dissolvent of all _Sulphureous_
bodies.
Secondly, _that this action_ it performs not, till the body be first
sufficiently heated, as we find requisite also to the dissolution of many
other bodies by several other _menstruums_.
Thirdly, _that this action_ of dissolution, produces or generates a very
great heat, and that which we call Fire; and this is common also to many
dissolutions of other bodies, made by _menstruums_, of which I could give
multitudes of Instances.
Fourthly, _that this action_ is perform'd with so great a violence, and
does so minutely act, and rapidly agitate the smallest parts of the
_combustible_ matter, that it produces in the _diaphanous medium_ of the
Air, the action or pulse of light, which what it is, I have else-where
already shewn.
Fifthly, _that the dissolution_ of sulphureous bodies is made by a
substance inherent, and mixt with the Air, that is like, if not the very
same, with that which is fixt in _Salt-peter_, which by multitudes of
Experiments that may be made with _Saltpeter_, will, I think, most
evidently be demonstrated.
Sixthly, _that in this dissolution_ of bodies by the Air, a certain part is
united and mixt, or dissolv'd and turn'd into the Air, and made to fly up
and down with it in the same manner as a _metalline_ or other body
dissolved into any _menstruums_, does follow the motions and progresses of
that _menstruum_ till it be precipitated.
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