, &c. in the Week of a Candle or Lamp,
it is evident, that it differs in nothing from the former, save only in
this, that in a _Filtre_ the Liquor descends and runs away by another part;
and in the Week the Liquor is dispersed and carried away by the Flame;
something there is ascribable to the Heat, for that it may rarifie the more
volatil and spirituous parts of those combustible Liquors, and so being
made lighter then the Air, it maybe protruded upwards by that more
ponderous fluid body in the Form of Vapours; but this can be ascribed to
the ascension of but a very little, and most likely of that only which
ascends without the Week. As for the Rising of it in a Spunge, Bread,
Cotton, &c. above the superficies of the subjacent Liquor, what has been
said about the _Filtre_ (if considered) will easily suggest a reason,
considering that all these bodies abound with small holes or pores.

From this same Principle also (_viz. the unequal pressure of the Air
against the unequal superficies of the water_) proceeds the cause of the
accession or incursion of any floating body against the sides of the
containing Vessel; or the _appropinquation_ of two floating bodies, as
_Bubbles_, _Corks_, _Sticks_, _Straws_, &c. one towards another. As for
instance, Take a Glass-jar, such as AB in the seventh _Figure_, and filling
it pretty near the top with water, throw into it a small round piece of
Cork, as C, and plunge it all over in water, that it be wet, so as that the
water may rise up by the sides of it, then placing it any where upon the
superficies, about an inch, or one inch and a quarter from any side, and
you shall perceive it by degrees to make _perpendicularly_ toward the
nearest part of the side, and the nearer it approaches, the faster to be
moved, the reason of which _Phaenomenon_ will be found no other then this,
that the Air has a greater pressure against the middle of the
_superficies_, then it has against those parts that approach nearer, and
are _contiguous_ to the sides. Now that the pressure is greater, may (as I
shewed before in the explication of the third _Figure_) be evinced from the
flatting of the water in the middle, which arises from the gravity of the
under _fluid_: for since, as I shewed before, if there were no gravity in
the under _fluid_, or that it were equal to that of the upper, the
terminating Surface would be _Spherical_, and since it is the additional
pressure of the gravity of water that makes it so