[ 66o ] ' 
contrary, I do not fee how a particle at G can help 
being repelled with more force in that diredion than 
the contrary, unicfs the air on the outfide of the 
furface M.N \yas more overcharged than the fpace be- 
tween P and G. 
In like manner, if any part of the furface is un- 
dercharged, the fluid will have a tendency to run in 
at that part from the air. 
The truth of this is fomewhat confirmed by the 
third problem; as in all the cafes of that problem, 
the fluid was (hewn to have a tendency to run out of 
the fpaces A D and E H, at any furface which was 
overcharged, and to run in at any which was under- 
charged. 
C o R o L. I. 
If any body at a diflance from other over or 
undercharged bodies, be pofitively eledrified, the 
fluid will gradually run out of it from all parts of its 
furface into the adjoining air ; as it is plain that all 
parts of the furface of that body will be overcharged : 
and if the body is negatively eledrified, the fluid will 
gradually run into it at all parts of its furface from the 
adjoining air. 
COROL. II. 
Let the body A (fig. 6 .) infulated and containing 
juft fluid enough to faturate it, be brought near the 
overcharged body B ; that part of the lurface of A 
which is turned towards B wDl by Prep. 1 1 . be ren- 
• dered 
