i8 ANALYSIS OF 



which was the flandard of the air before the procefs ; 

 that is, when one meafure of this air was mixed with one 

 meafure of nitrous air, it occupied that fpace. When the 

 air that had been imbibed was expelled from the water, 

 it was of the liandard of 0.75. Both mixed together 

 were exadlly of the ftandard of atmofpherical air. 



I had thought that, tliough deplogifticated and in- 

 flammable air will not unite while they retain their aerial 

 form, without a red heat, they might do fo when they 

 were both deprived of that form, by being combined with 

 water, and make phlogifticated air ; I therefore made a 

 quantity of water deprived of all air imbibe a mixture of 

 equal quantities of thofe two kinds of air. But when 

 this mixed air was expelled from the water, it was fired 

 with an explofion, fo that no union had been formed 

 between them. I then made a quantity of water imbibe 

 the two kinds of air one after the other, but there was 

 no difference in the refult. The air that was expelled 

 from the water was ftill fired with one explofion. 



But dephlogifhicated and nitrous air, which unite 

 without heat in their aerial form, did the fame when they 

 were combined with water. Having expelled all its air 

 from a large quantity of diflilled water, I firfl made it 

 imbibe as much as it could of nitrous air, and after that 

 of dephlogifticated air, and obferved that what remained 

 of each, not abforbed by the water, was very little 

 changed. Then, expelling the air from the water thus 

 doubly impregnated, the firit quantity procured was 

 dephlogifticated, though not fo pure as before; the ftan- 

 dard of the procefs with two equal quantities of nitrous 

 air being 0.6, whereas before it had been 0.2. The 

 ftandard of the fecond expulfion of air was 0.4. After- 

 wards it was o.S, then i.o ; and thus it would, no doubt, 

 have proceeded, till it had been wholly phlogifticated ; 

 but no part of it had the property of nitrous air. This 



kind 



