[ 654 ] 
Case II. If we now fuppofe that the fluid is 
at liberty to efcape from out of A, if it has any 
difpolition to do fo, the quantity of fluid in it be- 
fore the approach of B being ftill fuflicient to fa- 
turate it ; that is, if A is not infulated and not 
ele£lrified, B being ftill pofttively eleftrifled, they 
will attra(ft with more force than before : for in 
this cafe, not only fbme fluid will be driven from 
that part of A which is neareft to B to the oppo- 
fite part, but alfb fome fluid will be driven out 
of A. 
It mu ft be obferved, that if the repulfion of B 
on a particle at E, (fig. 19.) the fartheft part of 
A, is very fmall in refpe(ft,of its repulfion on an 
equal particle placed at D, the neareft part of A, 
■ the two bodies will attradl with very nearly the 
fame force, whether A is infulated or not; but if 
the repulfion of B, on a particle at E, is very near 
as great as on one at D, they will attraft with 
very little force if A is infulated. For inftance, 
let a fmall overcharged ball be brought near one 
end of a long condu(ftor not ele6trified ; they will 
attradl with very near the fame force, whether the 
condu(ftor be infulated or not ; but if the conduc- 
tor be overcharged, and brought near a fmall un- 
ele£lrified ball, they will not attraft with near fo 
much force, if the bail is infulated, as if it is not. 
Case III. If we now fuppofe that A is nega- 
tively electrified, and not infulated, it is plain that 
they will attract with more force than in the laft 
cafe; 
