OF ARTS AND SCIENCES. 61 



far as we could judge by the eye, about the same amount of residue in 

 the retort each time. These residues we analyzed, as we did also the 

 final distillate. The material first distilled was the same as that 

 marked c in the table on page 40, and we assumed that the average of 

 the results there given truly represented its composition. 



Analyses of Antimonious Chloride. 



Kesidues and Distillates. 



% of Clilorine. 

 The original purified preparation 46.64 



The residue of 1st distillate 45.71 



„ 2d „ 45.66 



„ 3d „ 46.03 



„ 4th „ 46.26 



„ 5th „ 46.26 ■ 



„ 6th „ 46.00 



„ 7th „ 46.03 



„ 8th „ 45.94 



„ 9th „ 45.65 



„ 10th „ 45.99 



The last distillate 46.62 



Although, under the circumstances, we could not expect great preci- 

 sion, yet it was evident from these analyses that the amount of impurity 

 in the residues was not diminished by the successive distillations ; and 

 we therefore concluded that additional oxichloride of antimony must be 

 formed each time during the very short contact with the atmosphere 

 which the transfers between the several distillations necessarily in- 

 volved. But, on the other hand, the very remarkable fact that these 

 ten distillations produced no sensible change in the composition of the 

 great mass of the material seemed to indicate equally clearly that this 

 action of the atmosphere had no perceptible influence on the final 

 result ; and this opinion was still further strengthened when, on twice 

 distilling portions of the last distillate, at a low temperature, in a 

 current of dry hydrogen, we obtained products giving again — very 

 nearly at least — the same per cent of chlorine. And, lastly, when to 

 all this evidence were added the results of the complete analysis of the 

 chloride, showing an amount of antimony which fully supplemented 



