U9) 
fteem'd intrinHckjattd even inmoft,by the 
Vulgar % and confequentl-y, 
I. That the Worms and Stones gene¬ 
rated withm our Body, are moft of them 
produced in the externd fluid, 
a. That divers parts are neceflary to 
Animals, becaufe they are there, not 
that the Animal could not he without 
them. 
I Call the Fluidiwhich toucheth thelc 
furfaces, External^ becaule it communi* 
cateth with the ambient fluid by chan¬ 
nels without any intermediate capillary 
VelTels, that is, without percolation or 
ftraining: whereby it comes to pals,that 
though the cavities, containing the faid 
fluids, be fometimes fliut, yet as often 
as they are open’d, they difeharge all the 
parts of the retain’d Fluid without dif-; 
crimination. 
I call that Fluid inttrmly which hath 
no communication with the External &\i- 
id, but by the intermediate ftrainers of 
the Capillary VelTels,and therefore natu¬ 
rally never transfufeth all its parts into 
the outward Fluid without Tome differ¬ 
ence. ^ 
The Cmmvn internal Fluid is that, 
tvhich 
