1 66 Analyjis of the -Air. 



When the matter was fufficiently diftilled, 

 the retort, &c. was gradually removed from 

 the fire; and when cool enough, was carried 

 into another room, where there was no fire. 

 When all was throughly cold, either the 

 following day, or fometimes three or four 

 days after, I marked the farface of the water 

 y, where it then flood : if the furface of the 

 water was below z, then the empty fpace 

 between y and z (hewed how much Air was 

 generated, or raifed from a fix'd to an ela- 

 ftick (late, bv the action of the fire in diftil- 

 lation : But if y 9 the furface of the water, 

 was above #, the fpace between z and y, 

 which was filled with water, fhewed the 

 quantity of Air which had been abforbed id 

 the operation, i. e. was changed from a re- 

 pelling elaftick to a fix'd ftate, by the ftrong 

 attraction of other particles, which I there- 

 fore call abforbing. 



When I would meafr.re the quantity of 

 this new generated air, I feparated the bolt- 

 head from the retort -, and putting a cork 

 into the fmall end of the bolthead, I inverted 

 it, and poured in water to z. Then from 

 another veffel (in which I had a known 

 quantity of water by weight) I poured in 

 yyater to y$ fo the quantity of water which 



was 



