144 Vegetable Statlcks. 
of wood confifts in the fhooting of their fi- 
bres lengthways under the bark. 
That thefap does not defeend between the 
bark and the wood , as the favourers of a cir- 
culation fuppofe, feems evident from hence, 
*viz. that if the bark be taken off for 3 or 
4 inches breadth quite round, the bleeding of 
the tree above that bared place will much 
abate, which ought to have the contrary 
effed, by intercepting the courfe of the re- 
fluent fap, if the fap defeended by the bark. 
But the reafon of the abatement of the 
bleeding in this cafe may well be account- 
ed for, from the manifeft proof wc have 
in thefe Experiments, that the fap is ftrong- 
ly attraded upwards by the vigorous opera- 
tion of the perfpiring leaves, and attrading 
Capillaries: But when the bark is cut off* 
for fome breadth below the bleeding place, 
then the fap, which is between the bark and 
the wood below that disbarked place, is 
deprived of the ftrong attrading power of 
the leaves, and confequently the bleed- 
ing wound cannot be fupplied fo fall: with 
fap , as it was before the bark was taken off. 
Hence alfo we have a hint for a probable 
conjedure why in the alternately disbarked 
flicks. 
