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I was now thoroughly convinced, 

 that the nitrous teil failed entirely 

 in fhewing the degree of faluhrity 

 of this air ; for it appeared by this 

 method to be nearly dephlogifticated 

 air, and yet it was Hill a true poi- 

 fonous air*. 



I was indeed very forry to find 

 this failure in a method fo well ad- 

 apted for the exploration of atmo- 

 fpheric air. But I am very far 

 from thinking that this exception 

 diminimes in any way the real value 

 of the important difcovery, that 

 Nitrous air dimiHt/bes refpirable air 

 in the proportion to its falubrity. For 

 this teft holds good in atmofpheric 

 air, which is the chief object of our 

 experiments, 



SEC- 



* Does this air owe its explofive nature to the dephlo- 

 gifticated air oozing out of the plant ? But this very 

 air becomes alio explofive, though it ftends with a 



plant 



