[ 234 J 
inverted upon a difh; the apples 
became covered with a great number 
of fmall air-bubbles. After they 
had been thus expofed to the fun 
from ten in the morning till four 
in the afternoon, a moderate quan~- 
tity of air was obtained, which 
proved to be very bad; a flame 
wana extinguifhed in it. One 
ifure of it with one of nitrous 
occupied 2:60.- - et 
87. Two dozen of young and 
{mall French deans were put in a 
quart jar full of water, and expofed 
in the fun from ten till two o’ clock: 
they were covered all over with a 
great many {mail air-bubbles ; the 
quantity of air collected was but 
fmall, and in quality fomewhat 
worfe than common air. One mea- 
fure of it with one of nitrous air 
pereni, I.I43 whereas one mea 
