3S] 
which abforb air, and others which 
throw it out by way of excretion, 
as are the excretory ducts of ani- 
mals; that the air fecreted, being 
dephlogitticated air, is thrown out 
as noxious to the plant (which ar- 
ticle is clearly demonitrated by Dr. 
Prieftley and Mr. Sheele); that in 
the moit part of plants, principally ,, 
trees, the greateft part of inhaling 
pores are placed upon the upper fide 
of the leaf, and the excretory duéts 
paacgally 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 
shaking the air and the waters, pro- 
2 ee ee duce 
