the cause of the curious _sixangular figures_ of Snow, and the appearances
of _Haloes, &c._ and the sudden _thickning_ of the Sky with Clouds, and the
_vanishing_ and _disappearing_ of those Clouds again; for all these things
may be very easily _imitated_ in a _glass of liquor_, with some slight
_Chymical preparations_ as I have often try'd, and may somewhere else more
largely relate, but have not now time to set them down. But to proceed,
there are other bodies that consist of particles more _Gross_, and of a
more _apt_ figure for _cohesion_, and this requires _somewhat greater_
agitation; such, I suppose [Mercury], _fermented vinous_ _Spirits_, several
_Chymical Oils_, which are much of kin to those Spirits, &c. Others yet
require a _greater_, as _water_, and so others _much greater_, for almost
infinite degrees: For, I suppose there are very _few_ bodies in the world
that may not be made _aliquatenus_ fluid, by _some_ or _other_ degree of
agitation or heat.

Having therefore in short set down my Notion of a Fluid body, I come in the
next place to consider what _Congruity_ is; and this, as I said before,
being a _Relative property_ of a fluid, whereby it may be said to be _like_
or _unlike_ to this or that other body, whereby it _does_ or _does not mix_
with this or that body. We will again have recourse to our former
Experiment, though but a rude one; and here if we mix in the dish _several
kinds_ of sands, some of _bigger_, others of _less_ and finer bulks, we
shall find that by the agitation _the fine sand_ will _eject_ and _throw
out_ of it self all those _bigger_ bulks of small _stones_ and the like,
and those will _be gathered_ together all into _one_ place; and if there be
_other_ bodies in it of other natures, those also will be _separated_ into
a place by themselves, and _united_ or _tumbled_ up together. And though
this do not come up to the _highest property_ of _Congruity_, which is a
_Cohæsion_ of the parts of the fluid together, or a kind of _attraction_
and _tenacity_, yet this does as 'twere _shadow_ it out, and somewhat