ot so strong as that of Glass, which keeps Quick-silver
suspended to the height of 60 or 70 Inches, and therefore acts with a
Force which would keep Water suspended to the height of above 60 Feet.

By the same Principle, a Sponge sucks in Water, and the Glands in the
Bodies of Animals, according to their several Natures and Dispositions,
suck in various Juices from the Blood.

If two plane polish'd Plates of Glass three or four Inches broad, and
twenty or twenty five long, be laid one of them parallel to the Horizon,
the other upon the first, so as at one of their ends to touch one
another, and contain an Angle of about 10 or 15 Minutes, and the same be
first moisten'd on their inward sides with a clean Cloth dipp'd into Oil
of Oranges or Spirit of Turpentine, and a Drop or two of the Oil or
Spirit be let fall upon the lower Glass at the other; so soon as the
upper Glass is laid down upon the lower, so as to touch it at one end as
above, and to touch the Drop at the other end, making with the lower
Glass an Angle of about 10 or 15 Minutes; the Drop will begin to move
towards the Concourse of the Glasses, and will continue to move with an
accelerated Motion, till it arrives at that Concourse of the Glasses.
For the two Glasses attract the Drop, and make it run that way towards
which the Attractions incline. And if when the Drop is in motion you
lift up that end of the Glasses where they meet, and towards which the
Drop moves, the Drop will ascend between the Glasses, and therefore is
attracted. And as you lift up the Glasses more and more, the Drop will
ascend slower and slower, and at length rest, being then carried
downward by its Weight, as much as upwards by the Attraction. And by
this means you may know the Force by which the Drop is attracted at all
distances from the Concourse of the Glasses.

Now by some Experiments of this kind, (made by Mr. _Hauksbee_) it has
been found that the Attraction is almost reciprocally in a duplicate
Proportion of the distance of the middle of the Drop from the Concourse
of the Glasses, _viz._ reciprocally in a simple Proportion, by reason of
the spreading of the Drop, and its touching each Glass in a larger
Surface; and again reciprocally in a simple Proportion, by reason of the
Attractions growing stronger within the same quantity of attracting
Surface. The Attraction therefore within the same quantity of attracting
Surface, is reciprocally as the distance between the Glasses. And