[ IS2 ] 



up one meafure of common air with 

 one of nitrous air, and (baking the 

 tube immediately when the t^o airs, 

 came in contact with one another. 

 In examining the dephlogiiticatecj 

 airs, I joined two meafures of ni- 

 trous airs to one of cephlogifticated 

 air, making them in the fame way 

 as in the former cafe ; but, as thefe 

 two meafures of nitrons air did net 

 always c0mpleat fully the faturation 

 of this kind of air, I added another 

 .meafure of nitrous air to it, and fo 

 on till no farther diminution took 

 piace. 



I have been careful to exprefs the 

 two different tells in my experiments 

 chiefly in the fir ft ft ft ion, lb that 

 the reader, who is already initiated 

 in the method of Dr. Prieftley, may 

 find how far the refult of my expe- 

 q riments 



