E75 1 
ftate hurtful to them, but rendered 
ufeful to the animals, who in their 
tour take from this air, by the ac 
of refpiration, what they want, and 
‘throw out the remainder as hurtful 
to’ them; but rendered again 
“ferviceable to the vegetables.” This 
theory feems to be very reafonable, 
and to have fome foundation in na- 
ture. It throws a good deal of light 
upon the ceconomy of nature, and. 
“Give mutual influence which the: ven 
-getable kingdom | 
“yal;~and the animal upon the ve- 
getable. It has fome analogy with 
other general operations of nature, 
| which are well known? 
= A plant, which is a living being, 
" deftitute of motion, remaining upon 
“the fame fpot on which it took its 
"beginning, if not capable, as animals 
ale, of going in fearch of its food, 
muft . 
