I 35 ] 



which abforb air, and others which 

 throw it out by way of excretion, 

 as are the excretory duels of ani- 

 mals; that the air fecreted, being 

 dephlogifticated air, is thrown out 

 as noxious to the plant (which ar- 

 ticle is clearly demonflrated by Dr. 

 Prieftley and Mr. Sheele); that in 

 the moil part of plants, principally 

 trees, the greateft part of inhaling 

 pores are placed upon the upper iide 

 of the leaf, and the excretory ducts 

 principally on the under fide. 



If thefe conjectures were well 

 grounded, it would throw a great 

 deal of new light upon the arrange- 

 ment of the different parts of the 

 globe, and the harmony between 

 all its parts would become more con- 

 fpicuous. We might find, that 

 partial tempefts and hurricanes, by 

 fhaking the air and the waters, pro- 

 D a duce 



