2 a78 6 
gu. §4. A handful of Perfcaria urens, 
thetwowater pepper, was kept in a green 
woyed. bottle, and expofed to the open air 
from the evening till next day at 
ten o’ clock, when the air collected 
from it was found of the following 
226 telt, 1.905 1.86;.2:78 3. 3.74) 
5s. Two handfuls of leaves of 
. Lauro-cerafus were put in a jar full 
1 of water, and expofed to the open 
_ air during 24hours; a good quan-— 
tity of dephlogifticated air was ob- 
tained, whofe teft was 1.783 1.673 
g06 2.02: 2.973 3.94. 
sec 
