/»;/ Wafer //"^/ other Liquids, 2W 



wc take Vt? ^^ aoovc, then the residuum wil! 

 have only 17 per cent, oxygen ; agreeably to 

 the prindpJe established in article 4, ITiis 

 circumstance accounts for the observations 

 made by Dr. Priestley, and Mr. William 

 1 f enry^ that water absorbs o^^gen In pre- 

 ference to azot. 



12. if a tall glass vessel, containing a smaU 

 portion bf gas ht inverted into a deep trough 

 of water iand the gas thus conlined by the 

 glass ai^ the water be briskly agitated, it will 

 gradually disappear. 



It is a wonder that Dr. Priestly, who seems 

 to have been the first to notice this fact, should 

 hnve made any difficulty of it; — the loss of 

 lias evidently « 4iiechanical cause ; the 

 ai^ilation divides the air into an infinite 

 number of minute bubbles winch may be seen 

 pervading the whole watfer ; these are succes- 

 sively driven out ifom tmdcr the margin of the 

 glass into the trough, and so escape. 



13. If old stagnant water be in the trough, 

 in the last experiment, and atmospheric air be 

 the subject, tiie oxygenous gas will very soon 

 be almost wholly extracted and leave a re- 

 siduum of azotic gas ; but if the water be fully 

 impregnated with atmospheric air at the be- 

 ginning, the residuary gas examined at any 

 time will be pure atmospheric air. 



