DR. TURNER ON CHLORIDE OF BARIUM. 299 



hesitate to adopt it. I conclude, accordingly, that 100 parts of chloride of 

 barium correspond to 137.63 parts of chloride of silver; and as, consistently 

 with the preceding researches, this quantity of homsilver contains 34.016 

 parts of chlorine, it follows that chloride of barium consists of 



Barium 65.984 



Chlorine 34.016 



9no raonl^ 



100.000 . . 



^== 10lifitf(; 



Its constitution according to Dr. Thomson and Berzelius is shown by the 

 following numbers : 



Thomson. Bekzelius. 



Barium 66.037 65.926 



Chlorine 33.963 34.074 



100.000 100.000 



It is impracticable, from the composition of chloride of barium as above 

 stated, to make any satisfactory inference relative to the real equivalent of 

 barium, because the real equivalent of chlorine is not yet clearly ascertained. 

 By Dr. Thomson it is estimated at 36, and by Berzelius at 35.43 ; and on 

 calculating the equivalent of barium according to both estimates, the following 

 result will be obtained. 



Barium 69.832 68.726 



Chlorine 36.000 35.430 



105.832 104.156 



Hence if 36 is the equivalent of chlorine, that of barium will be 69.832, or 

 very near 70 as stated by Dr. Thomson ; but if the calculation be continued, 

 still taking the results of my experiments as its basis, the equivalent of sul- 

 phuric acid will turn out to be 40.901 instead of 40. From these considera- 

 tions it appears evident that at least one of the equivalent numbers concerned 

 in the calculation must be incorrect. I abstain, however, from offering any 

 further opinion on this point at present, as it will form the subject of another 

 communi cation. 



2 Q 2 



