C 258 ] 



^ an ; f The inflammable air put with 



a^™ the walnut-leaves feemed to be cor- 



troyed# reeled fo much as to appear, by 



the nitrous teft, better than the 



common air was at the time ; for 



one meafure of it with one of 



nitrous air occupied 1.03 ; whereas 



one meafure of common air with 



one of nitrous air occupied 1.05. 



This inflammable air gave the fol-* 



lowing refult, by Abbe Fontana's 



184 teft, 1. 91 ; 2.16^; 3.16. 



Having filled a cylindrical jar 

 with this air, I found it explode 

 with an uncommon loud report, 

 which furprized me not a little, 

 and gave me fome apprehenfion 

 that the nitrous teft might fail in 

 fome inftances. The inflammable 

 air let up in the jar with the Per- 

 Jicaria urens gave the following 

 teft : one meafure of it with one of 



nirous 



