[ a ? 3 



SECTION IV. 



*?be dephlogif Heated air oozing out of 

 the leaves in the water is not air. 

 from the water itfelf. 



THE reverend Dr. Prieftley; 

 found, that water, chiefly pump 

 water, {landing fome clays by itfelf, 

 forms at the bottom and fides of the 

 vefTel a kind of green matter, feem- 

 ingly vegetable, from which air 

 bubbles rife continually to the top of 

 the jar, if expofed to the fun-lliine : 

 that this air is fine dephlogifticated 

 air, which fhews that there is a fa- 

 culty in water to produce by itfelf 

 this beneficial fluid ; and thus, that 

 the mafs of the waters of the fea, 

 lakes, and rivers, have their fhare 

 in purifying the atmofphere. 



But; 



