a 

 <c 

 cc 

 cc 



Vegetable Staticks. 159 



I found the fame event in Birch and Mul- 

 berry flicks, in both which it iffued mofl plen- 

 tifully at old eyes, as if they were the chief 

 breathing places for trees. 



And Dr. Grew obferves, that " the pores 

 <c 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 a glafs ; 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 

 <c skin, in the end of the fingers, and ball 

 " of the hand. 



" In the leaves of Pine they are likewife, 

 <c thro* a glafs, a very elegant fhew, ftanding 

 " all mofl exadtly in rank and file, through 

 " 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 nourifhment 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 



