[ 62 3 ]■ 
cliarged, or both undercharged, but in difderenf 
degrees ; and let the redundance or dehcience 
of fluid in each be very fmall in refpe(fl: of the 
whole quantity of fluid in them : it is impoflible 
for the fluid to be difpofed accurately in a flmilar 
manner in both of them ^ j as it has been 
fhewn that there will be a [pace, clofe to the 
furface, which will either be as full of fluid as it 
can hold, or will be intirely deprived, of fluid j 
but it will be difpofed as nearly in a iimilar 
manner in: both, as is poffible. To explain 
this, let BDE and bde (fig. i 2 ) be the two. 
flmilar bodies j anddet the fpace comprehended.' 
between the furfaces B D E and F G H. (or the 
fpace B F as I (hall call it for fhortnefs) be that, 
part of BDE, which is either as full of fluid as. 
it can hold, or intirely deprived of it: draw the. 
furface fuch that the fpace fhall be 
to the Ipace B F, as the quantity of redundant: 
or defleient fluid m.b de,. to that in B D E, and 
tliat the thicknefs of the fpace b f flaall every, 
where bear the fame proportion to the corre- 
fponding thicknefs of B F : then will the fpace 
bf be either as full of fluid as it can hold, or. 
* By the fluid being dirpofeJ’ in a fimilar manner in loth, 
bodies, I mean that the quantity of redundant or deficient fluid 
in any flmall part of one body,, is to that in the correfpom ing . 
fmall p.irt of the other, as the whole quantity of redundant or 
dtficient fluid in one body, to that in the other. J3y the quan- 
tity of deficient fluid in a body, I mean, the quantity of faidi 
wanting to faturate it. Notwithftanding the impropriety of this 
exprtflion, 1 muft beg leave to make ule ot it, as it will Irc- 
quently fave a great deal of circumlocution. 
