C ^53 1 
brought near it, it will be pofitively ele£lrified ; for 
fuppoling A to communicate with any body B, at 
an infinite diflance, by a canal of incompreffible 
fluid, it is plain that unlefs B is overcharged, the 
fluid in the canal could not be in equilibrio, but 
would run from A to B. For the fame reafon a 
body inflilated and faturated with fluid, will be 
negatively electrified if placed near an undercharg- 
ed body. 
§ 2. The phaenomena of the attraction and re- 
puhion of electrified bodies feem to agree exaCtly 
with the theory; as will appear by confidering 
the following cafes. 
Case I. Let two bodies, A and B, both coiv- 
duCtors of electricity, and both placed at a great 
diflance from any other electrified bodies, be 
brought near each other. Let A be infulated, and 
contain jufl fluid enough to faturate it ; and let B 
be pofitively eleCtrified. They will attraCt each- 
other ; for as B is pofitively eleCtrified, and at a 
great diflance from any overcharged body, it will 
be overcharged ; therefore, on approaching A and 
B to each other, fome fluid will be driven from 
that part of A which is nearefl to B to the further 
part : but when the fluid in A was fpread uni- 
formly, the repulfion. of B on the fluid in A was 
equal to its attradion on the matter therein ; there- 
fore, when fome fluid is removed from thole parts 
where the repulfion of B is flrongefl to thofe 
where it is weaker, B will repel the fluid in A 
with lefs force than it attraas the matter; and. 
confequently the bodies will attraa each other. 
Case 
