Vegeiahle Stattch. 153 
thro' the length of the leaves." Grew's 
Anatomy of Plants, p, 127. 
Whence it is very probable, that the air 
freely enters plants, not only with the prin- 
cipal fund of nourifhmcnt by the roots,’ 
but alfo thro* the furface of their trunks and 
leaves, efpecially at night, when they are 
changed from a perfpiring to a flrongly 
imbibing ftate. 
I fix’d in the fame manner to the top of 
the air pump receiver, but without the cy- 
lindrical glafs jy y , the young flioots of the 
VinCy Apple tree and Honyfuckle, both e- 
reded and inverted, but found little or no 
air came either from branches or leaves, ex- 
cept what air lay in the furrows, and the 
innumerable little pores of the leaves, which 
are plainly vifiblc with the microfeope. I 
tryed alfo the lingle leaf of a Vine, both by 
immerfing the leaf in the water x , and let- 
ting the ftalk ftand out of the receiver, as 
alfo by placing the leaf out of the receiver, 
and the ftalk in the glafs of water x ^ but 
little or no air came either way. 
I obferve in all thefe Experiments, that 
the air enters very flo wly at the bark of young 
fhoots and branches, but much more freely 
thro' 
