': 



: - 





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Analyfis of the Air. 1^9 



up a tripple (pace or fomething more : For 

 which reafon the leaft retorts are beft for 

 thefe Experiments. The expanfion of the 

 diftilling bodies was fometimes very little, 

 and fometimes many times greater than that 

 of the Air in the retort, according to their 

 different natures. 



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, cither the 

 following day, or fometimes 3 or 4 days af- 

 ter, I marked the furface of the water /, 

 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 elaf- 

 tick (late, by the adion of the fire in diftil- 

 lation : Cut if y the furface of the water 

 was above z, the fpace between z and /, 

 which was filled with water, fhewed the quan- 

 tity of Air which had been abforbed in the 

 operation, /. e. was changed from a repel- 

 ling claftick to a fix'd (late, by the ftrong 

 attraction of other particles, which I there- 



fore call abforbing. 



When 









