[ 43 3 



of animal 1 when collected in a confined or 



very clofe place, where little or no frcfli air 

 gain admittance, form a putrid atmofpherc too 

 noxious and deadly for animals to fubiiil in. In 

 this fenfc, indeed, vegetables may fuffer equally; 

 for freih air is as necelfary to fupport vegetable as 

 animal life, one being as incapable of fubiifting 

 without it as the other. But thefe evils rcfult 

 from accidental circumltanccs, and not from any 

 fixed law of nature, the wifeft provifion having 

 been made for clearing the air of noxious efflu- 

 via, and fupplying it univerfally with neceffary 

 vivifying principles. 



According to fome late difcovcries in natural 

 philofophy, the (economy of nature, in thisrefpect, 

 is tranfcendently beautiful and aftonifhing; for 

 thofe excrementitious vapours that would foon 

 render the air putrid and poifonous, are quickly 

 abforbed by the vegetable kingdom, and the air 

 purified and made fit for refpiration. 



The animal and vegetable kingdoms fcem to be 

 the mutual fupport of each other, with this diffe- 

 rence only; the latter is abfolutcly ncceflary to 

 the fupport of the former, but the former not to 

 the latter, it having a refource within itfelf, ami can 

 fubiiil without it, though evidently not to equal 



advantage. 



