[ 602 } . 
overcharged, and E H undercharged, the redundant 
6uid in CD exceeds half the redundant fluid in AD,- 
by a quantity fufficient to faturate half the redundant 
matter in EH. 
COROL, IL 
s 
It was before faid, that the fluid in the fpaces AB‘ 
and GH (when there is any fluid in them) is re- 
pelled againfl: the planes A a and H h ; and, confe- 
quently, would run out through thofe planes, if there 
was any opening for it to do fo. The force with 
which the fluid prelTes againfl: the planes ha and 
H is that with which the redundant fluid in A B 
is repelled by that in G H 3 that is, with which 
half the redundant fluid in both fpaces is repelled by 
an equal quantity of fluid. Therefore, the preflure 
againfl: ha and H/6 depends only on the quantity of 
redundant fluid in both fpaces together, and not at 
all on the thicknefs or diftance of thofe fpaces, or on- 
the proportion in which the fluid is divided between 
the two fpaces. If there is no fluid in A>B and GH, 
a particle placed on the outfide of the fpaces A D • 
and EH, contiguous to the planes ha or Hi6, is 
attra<fted towards thofe planes by all the matter in 
A B and G H, id ejl, by all the redundant matter 
in both fpaces ; and, confequently, endeavours to 
inflnuate itfelf into the fpace AD or E H ; and the 
force with which it does fo, 'depends only on the 
quantity of redundant matter in both fpaces together.. 
The fluid in C D alfo prefTes againfl the pi ane Dr/,, 
and the force with which it does fo, is that with 
-which- 
