C 265 ] 



117. I gathered fome inflamma- 

 ble air from ftagnating water, by 

 itirring up its muddy bottom. This 

 air was fo bad, that one meafure of 

 it with one of nitrous air occupied 

 1.98. One meafure of this air was 

 let up in ajar containing a fprig of 

 pepper-mint, the root being cut off. 

 It ftood from ten in the morning 

 till four in the afternoon in the fun- 

 fhine ; I found it fo much corrected, 

 that one meafure of it with one of 

 nitrous air occupied 1.60. It burnt 

 as well as before, 



118. An equal meafure of the 

 fame inflammable air from the ftag- 

 nating water was let up in a jar 

 containing a fmall plant of Perfica- 

 ria urenS) with root and all. After 

 {landing the fame time as the for- 

 mer, the air was examined, and 

 found more corrected than the other, 



for 



