Vegetable Staticks. 159 
I found the fame event in Birch and 
Mulberry flicks, in both which it ifliied moft 
plentifully at old eyes, as if they were the 
chief breathing places for trees. 
And Dr. Grew obferves, that “ the pores 
« are fo very large in the trunks of fome 
“ plants, as in the better fort of thick walk- 
« ing canes, that they are vifible to a good 
“ eye, without aglafs; but with a glafs the 
“ cane feems as if it were fluck top full of 
“ holes, with great pins, being fo large as 
“ very well to refemble the pores of the 
“ skin, in the end of the fingers and ball 
“ of the hand. 
“ In the leaves of Pine they are like- 
“ wife, thro’ a glafs, a very elegant fhew, 
“ Handing all moft exactly in rank and file, 
“ through the length of the leaves.” Grew'% 
Anatomy of Blunts , p. 127. 
Whence it is very probable, that the air 
freely enters plants, not only with the prin- 
cipal fund of nourilhment by the roots, but 
alfo through the furface of their trunks and 
leaves, efpecially at night, when they are 
changed from a perfpiring to a ftrongly im- 
bibing ftate. 
I fix’d in the fame manner to the top of 
the air pump receiver, but without the cy- 
lindrical 
