by Wattr and other Liquids, 283 



1 . All gases that enter into water and other 

 liquids by means of pressure, and are wholly 

 disengaged again by the removal of that 

 pressure, are mecJianically mixed with the 

 liquid, and not chemicallij combined with it. 



2. Gase^ so mixed with water, &c. retain 

 llheir elasticity ot' repulsive power amongst 

 tTieir own particles, just the same in the water 

 as out of it, the intervening water having no 

 other influence in this respect than a mere 

 vacuum. 



3. Each g^s is retained in watef by the 

 pressure of gas of its own kind incumbent Oii 

 its surface abstractedly considered, no other 

 gas with which it may be mixedhaving any 

 permanent influence in this respect. 



4. When water has absorbed its bulk of 

 carbonic acid gas, &c. the gas does not press 

 on the water at all, but presses on th(f con- 

 taining vessel just as if no water were in.— 

 AVhen water has absorbed its proper quantity 

 of oxygenous gas, &:c. that is, ^'-7- of its bulk, 

 the exterior gas presses on th6 siirfkc<i of the 

 water with 4t oii^s force, andoii the internal 

 gas with Vt of ^^s force, which force presses 

 upon the containing vessel and not on the 

 water. With azotic and hydrogenous gas the' 

 proportions are -^J and -5-V respectively. When 

 water containign'o gas; its surface' must sQpport 



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