[ i68 J 



ble kingdoms. No part of the terraqueous globe 

 that we know of, that is occupied by living crea- 

 tures of any kind, but is replete with vegetables 

 proper for their fuftenance and fupportj and it is 

 equally certain, that wherever vegetables grow 

 and flourifh, it is (locked with animals in propor- 

 tion thereto. 



It is fufficiently obvious, that the animal king- 

 dom is maintained and fupportcd by the vegeta- 

 ble; for though carnivorous animals eat little or no 

 vegetable food, yet they live upon thofe which are 

 entirely fupported by it; for they never eat each 

 other, unlefs in cafes of famine or great diflrefs. 

 It is v'ery pofTible the vegetable kingdom may no 

 lefs depend upon the animal for its fuftenance and 

 fupport, thah the animal doth upon it; and if the 

 writer is not much miftaken, pretty clear and 

 ftrong evidence may be had, that this is really the 

 cafe; fo that they reciprocally fubfift on and are 

 fupported by each other. 



It is not many years fince that a furp'riCng diH. 

 covery w'as made by that very celebrated invefti- 

 gator of nature Dr. Priestley, who clearly proved 

 by experiment, that common air, when become 

 feculent and putrid by animal refpiration and per-, 

 fpiration, fo as to be unfit for the common purpofes 



of 



