[ i°4 ] 

 be far fuperior to the atmofperic air, 

 for one meafure of it, with one of 

 nitrous air, occupied o. ,6 ; and 

 yet it exploded as ftrongly as before. 

 I replaced it again in the garden, 

 during four hours more, when it 

 appeared to be frill farther improved 

 by the nitrous ted, without loflng, 

 however, in the leait, its explofive 

 nature. See experiment 115. 



I had alio on the fame Saturday 

 put fome plants of perficaria urens 

 with their roots in ajar full of water, 

 and let up two pints of ftrong in- 

 flammable air. I found this air on 

 Sunday, after the jar had been 24 

 hours in the garden, fo much cor- 

 rected, that it approached to the 

 goodnefs of common air by the ni- 

 trous tell, though it exploded with 

 a loud report. I replaced the jar 

 again in the garden, and again ex- 

 3 amined 



