f= 34 
by the water before it was put to 
the teft. 
98. I impregnated a jar full of 
water with fixed air by means of 
falt of tartar and fpirit of vitriol, 
according to the method of Dr. 
Hulme. I put fome leaves of a 
vine in this water, which I found 
covered with a as foon as 
they were plung der the “3 
firft at the under (Race, and foon 
after at the upper furface alfo. 
“After ftanding about four hours in 
a warm fun-fhine, I found a very 
large quantity of air collected at 
the inverted bottom of the jar, 
“which I found by far the greateit 
part to be fixed air, as it was ab- 
forbed in the water by fhaking. 1 
put to the nitrous teft that part of 
it which remained unabforbed, 
