I o o f/egetabte Staticks. 
And by the fame principle it is, that wc 
fee in the preceding Experiments plants 
imbibe moifturc fo vigoroufly up their fine 
capillary velTcls j which moifture, as it is car- j 
ryed off in pcrfpiration, ( by the adion of | 
warmth,) thereby gives the fap vcffels li- 
berty to be almoft continually attracting 
of frdh fupplies, which they could not do, 
if they were full faturate with moifture : For 
v/ithoLit pcrfpiration the fap muft neceflarily 
ftagnate, notwithftanding the fap velfels are 
fo curiouily adapted by their exceeding fine- 
nefs, to raife the fap to great heights, in 
a reciprocal proportion to their very minute 
diameters. 
CHAP. III. 
Experiments^ jloewing the force of the fap 
in the Vine in the bleeding feafon, 
H aving in the firft chapter (hewn 
many inftances of the great quanti- 
ties imbibed, and perfpired by trees, and in 
the fccond chapter, feen the force with 
which they do imbibe moifture j I propofe 
next, to give an account of thofe Experi- 
ments, which prove with what great force 
I the 
