C J 59 ] 

 with the number 8 upon the fcale ? 

 and if above this mark are remain- 

 ing three entire divifions of 100 

 partitions each of the column of air, 

 the quantity of air exifting in the 

 tube amounts to 308 fub-divifions, 

 which being fubtradted from the 5 

 meafures of both airs employed, 

 or from the 500 fub-divifions of 

 both airs, the remainder will be 

 192, which is the exadt number of 

 the parts or fub-divifions of the two 

 airs deflroyed. 



If the air to be examined is de- 

 phlogifticated air, he continues let- 

 ting up one meafure of nitrous air 

 after another in the manner menti- 

 oned, till no more diminution takes 

 place. Six, feven, and fometimes 

 eight meafures of nitrous air are 

 required to faturate two meafures of 



dephlo- 



