[ 6i2 ] 
join to that in N H />« ; then it is plain that no fluid 
can run out of A into D ; any more than water will 
run out of a veifel through a fyphon, if the height of 
the bend of the fyphon above the water in the veflcl, 
is greater than that to which water will rife in vacuo. 
Corollary. 
If B is made undercharged, fome fluid will run 
out of D into A ; and that though the attradion of 
B on the fluid in the canal is ever fo great. 
PROP. XIV. 
Let ABC (fig. 8.) be a body overcharged with 
immoveable fluid, uniformly fpread ; let the 
bodies near ABC on the outfide be faturated 
with immoveable fluid ; and let D be a body 
inclofed within ABC, and communicating by 
the canal DG with other diflant bodies faturated 
with fluid ; and let the fluid in D and the canal 
and thofe bodies be moveable ; then will the 
body D be rendered undercharged. 
For let us firfl: fuppofe that D and the canal are fa- 
turated, and that D is nearer to B than to the oppofite 
part of the body, C j then will all the fluid in the 
canal be repelled from C by the redundant fluid in 
ABC; but if D is nearer to C than to B, take the 
point F, fuch that a partiele placed there would be 
repelled from C with as much force as one at D is 
repelled towards C ; the fluid in D F, taking the 
whole 
