ce 3+ 7 
cated to it, by computing the degree 
of fuperior goodneis the airis Ho 
to poffefs. 
As plants yield in a few hours 
fuch a confiderable quantity of de- 
phlogifticated air, though their 
fituation feems rather unfavoura- 
ble. for it when they are kept 
der water; may it not with 
fome degree of probability be con- 
jectured, that they yield much more 
of it when remaining in ther natu- 
ral fituation;. for then, being conti- 
nually {applied by new common air, 
their tock of Hit 
cannot be eviatled. Tie is an un- 
favourable circumftance, that. air is 
not an object of our fight; if it was, 
we fhould perhaps fee that plants 
have a kind of re{piration as animals 
have; that leaves are the organs of 
. it; that, perhaps, they have pores 
I : which 
x 
; 
‘| 
