L207 ] 
SEGTION. Vi. 
Experiments tending to invefiigate. 
to what degree plants may afed 
common air in the night, and by 
day time in foaded places. 
39. SOME plants of grafs, with 
Toots and all, were put in a sue of 
a gallon $ the jar was invert ‘upon 
a difh, and fome water put in nthe 
difh to keep the plants alive, and. 
to cut off the communication with 
the external air; in the morning 
the air in the jar was altered for the 
worfe;- the flame of a w axX-taper 
grew dim in it. One meafure of 
it with one: of nitrous air es 
T.24. : 
2 
