234 \ EXPERIMENTS OF GASES ABSORBED BY WATER. 



though fuch heat be fufficienl for the diftillation of water ; nor 

 can it be wholly expelled by a heat of 160° or 170°, continued 

 two hours. But it is well known, that water faturated with 

 carbonic acid gives up its gas rapidly, when freely expofed to 

 the atmofphere. 



In fixing the proportion of carbonic acid abforbed, it is 

 therefore neceflfary to note the quantity of refiduum, as is done 

 in the following table. 



Mr. Cavendifh's 

 refults. 



Since the above table was drawn up, I have been gratified 

 by remarking that, in the experiments of Mr. Cavendilh, fimi- 

 lar variations in the quantities abforbed, were produced by the 

 variable amount of the refidua ; as will appear from the follow-; 

 ing deductions from his experiments. 



At the temperature of 55 Q . 



1. When the gas abforbed was to the refidue as 100 to 164, i;r 

 100 cubical inches of water took up - - 116 



2. When the abforbed gas was to the refidue as 100 to 16, 

 100 inches of water took up •>• 10? 



3. The abforbed gas being to the refidue as 100 to 10, 

 100 parts of water abforbed ... I02f 



4. The abforption being to the refidue as 100 to If, 

 100 parts of water took up - 



The quality of the refiduum, I only afcertained in experi- 

 ments 5 and 6 of the preceding table. In experiment 5, the 

 refiduary two meafures contained l\,per cent, of common air, 

 or 0.15 of a meafure. But, of thofe, .13 exifted previoufly 

 in die 20 meafures of carbonic acid gas j and the 20 meafures. 



Of 



95 1 



