Vegetable Staticks. 107 
“ gla fs, which keeps quick-filver fufpended 
“ to the height of 60 or 70 inches, and 
“ therefore afts with a force, which would 
tc keep water fufpended to the height of a- 
“ bove 60 feet. 
“ By the fame principle, a fponge fucks 
a in water, and the glands in the bodies of 
(C animals, according to their feyeral natures 
* c and difpofitions, fuck in various juices 
“ from the blood/’ 
And by the fame principle it is, that we 
fee in the preceding Experiments plants im- 
bibe moifture fo vigoroufly up their fine ca- 
pillary veffels; which moifture, as it is car- 
ried off in perfpiration, (by the aCtion of 
warmth) thereby gives the fap veflels liber- 
ty to be almoft continually attracting of 
frefh fupplies, which they could not do, if 
they were full faturate with moifture : For 
without perfpiration the fap muft necelfarily 
ftagnate, notwithftanding the fapveifelsare 
fo curioufly adapted by their exceeding fine- 
nefs, to raife the fap to great heights, in a 
reciprocal proportion to their very minute 
diameters. 
CHAP. 
