[Sidenote: The heaviest Bodies may swimme.]
_All Matters, how heavy soever, even to Gold it self, the heaviest
of all Bodies, known by us, may float upon the Water._
Because its Gravity being considered to be almost twenty times greater
than that of the water, and, moreover, the greatest Altitude that the
Rampart of water can be extended to, without breaking the Contiguity
of the Air, adherent to the Surface of the Solid, that is put upon the
water being predetermined, if we should make a Plate of Gold so thin,
that it exceeds not the nineteenth part of the Altitude of the said
Rampart, this put lightly upon the water shall rest, without going to
the bottom: and if Ebony shall chance to be in sesquiseptimall
proportion more grave than the water, the greatest thickness that can
be allowed to a Board of Ebony, so that it may be able to stay above
water without sinking, would be seaven times more than the height of
the Rampart Tinn, _v. gr._ eight times more grave than water, shall
swimm as oft as the thickness of its Plate, exceeds not the 7th part
of the Altitude of the Rampart.
[Sidenote: _He elsewhere cites this as a Proposition, therefore I
make it of that number._]
And here I will not omit to note, as a second Corrollary dependent
upon the things demonstrated, that,