.. [655 ] 
cafe ; as A will be ftill more undercharged in this 
cafe, than in the laft. 
N. B. In thefe three cafes, we have not as yet taken 
notice of the effedt which the body A will have 
in altering the quantity and difpofition of the 
fluid in B ; but in reality this will make the 
bodies attradt each other with more force than 
they would otherwife do ; for in each of thefe 
cafes the body A attradls the fluid in B j which,^ 
will caufe fome fluid to flow from the farther 
parts of B to the nearer, and will alfo caufe 
^ fome fluid to flow into it, if it is not infulated, 
and will confequently caufe B to adl upon A 
with more force than it would otherwife do. 
Case IV. Let us now fuppofe that B is negatively 
eledtrifiedj and let A be infulated, and contain juft 
fluid enough to faturateit; they will attradl each 
other j for B will be undercharged ; it will therefore 
attradt the fluid in A, and will caufe fome fluid to 
flow from the fartheft part of A, where it is attradl-’ 
ed with lefs force, to the nearer part, where it is 
attradted with more force ; fo that B will attradl the. 
fluid in A with more force than it repels the matter.. 
Case V, and VI. If A is now fuppofed to be: 
not infulated and not eledtrified, B being ftill nega- 
tively eledtrified, it is plain that they willattradl: with, 
more force than in the laft cafe : and if A is pofltively, 
eledtrified, they will attradl with ftill more force. 
In thefe three laft cafes alio, the effedt which Ai 
has in altering the quantity and difpofition- of the; 
fluid. 
