[ 2 J 
417. I gathered fome inflammas 
ble air from, ftagnating water, by 
ftirring up its muddy bottom. This 
air was fo bad, that.one meafure of 
it with one of nitrous air occupied 
1.98. One meatfure 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 ene, neeaiure: of 4 it I | one of 
as well’ as re ae aie 2a ee — 
--3418.. An equal. asia of ‘the 
fame inflammable air from the flag- 
nating water was let up in a jar 
containing a fmal] plant of Perfea- 
nie Urens, with root and all... Adter 
nding the fame time as the for; 
veciecsine air was examined, and 
found more corrected than the other 
