[ 66l ] 
dered undercharged, and will therefore Imhihe elec- 
tricity from the air j and at the oppofite furface R S, 
the fluid will run out of the body into the air. 
C O R O L. Ill* 
If we now fuppofe that A is not infulated, but 
communicates with the ground, and confequently that 
it contained juft fluid enough to faturate it before the 
approach of B, it is plain that the furface M N will 
be more undercharged than before ; and therefore the 
fluid will run in there with more force than before j 
but it can hardly have any difpofition to run out at 
the oppofite furface R S j for if the canal by which 
A communicates with the ground is placed oppofite 
to B, as in figure 5, then the fluid will run out 
through that canal till it has no longer any tendency to 
run out at RS ; and by the remarks at the end of Prop. 
27, it feems probable, that the fluid in A will be 
nearly in the fame quantity, and difpofed nearly in 
the fame manner, into whatever part of A the canal 
is inlerted by which it communicates with the 
C o R o L. IV. 
If B is undercharged the cafe will be reverfed j that 
is, it will run out where it before run in, and will run 
in where it before run out. 
As far as I can judge, thefe corollaries feem con- 
formable to experiment: thus far is certain, that 
bodies at a diftance from other cle(ftrifled bodies re- 
ceive 
