
280 MR G. CARR ROBINSON ON THE 
it with an alcoholic solution of acetate of baryta, and, when possible, crystal- 
lising the new baryta salt from alcohol. | 
The following are the analyses of these baryta salts :— 
The barium was estimated in the usual way, by igniting the salt with sul- 
phuric acid, and weighing as BaSQ,. 
Analysis of baryta salt, marked A, from ether boiling between 205° and 
210° C. 
Five estimations of barium gave a mean of 32°50 per cent. barium. 
Estimation of carbon and hydrogen ; combustion made with chromate of 
lead. 
0:21625 grammes baryta salt gave— 
0337 grammes CO, = 42°54 per cent. carbon. 
0:13075 e HO= 6-70 Bs hydrogen. 
Allowing for the carbon retained by the baryta as BaCO,, and adding this 
to the carbon found, gives 45°31 per cent. carbon in salt,* thus— 
100 grammes baryta salt yields, on analysis, 32°5 grammes Ba. 
0:21625 grammes of salt (quantity used in combustion) = 0:07028 grammes Ba. And 
137 grammes Ba require 44 grammes CO, to form BaCOQ. y 
*. 0:07028 grammes Ba require 0:0225 grammes CO,. 
0:0225 + 0°337 (CO, found) = 0°3595 grammes CO,,. 
= 45°31 per cent. carbon. 
Analysis of baryta salt, marked A— 

Carbon, . ; i ’ : . Apt 
Hydrogen, ; é : : 6°70 
Barium, . : , ; ; 5 32°50 
Oxygen (by difference), . é : 15°49 
100-00 
Agreeing with barium caprylate (C,H,;O,).Ba, which requires— 

Carbon, . . : 3 ; : 45°39 
Hydrogen, . : : 7:09 
Barium, ; : : : ; 32°38 
Oxygen, . : : j 15:14 
100-00 
A weighed quantity of this salt, A, on being exposed for three hours to 
100° C., did not lose weight ; it is therefore anhydrous. 
* Explanation of this will be found at end of analyses of these salts. 

