RICHARDS. 



ATOMIC WEIGHT OF BARIUM. 



79 



RATIO OF ARGENTIC AND BARIC CHLORIDES. 

 First Series. 



The second series of determinations is distinguished from the first 

 by the fact that the baric chloride was fused in an atmosphere of 

 pure dry hydrochloric acid, beiug contained in a platinum crucible 

 provided with a perforated cover. No phenol phthalein was added 

 to the salt after its solution, and only a trace of methyl orange, in 

 order to prove its absolute neutrality. Hence, the danger of a slight 

 reduction of silver by compounds of carbon was much lessened. In 

 all other respects the analysis was conducted in a manner similar to 

 that employed in the last series, except that even greater care was 

 used. 



RATIO OF ARGENTIC AND BARIC CHLORIDES. 



Second Series. 



* Compare also these Proceedings, XXVIII. 12, also 26. 



