62 PROCEEDINGS OF THE AMERICAN ACADEMY 



Bromide of Antimony, SbBrg. 



The substance used being a white crystalline solid, not deliquescent 

 and not readily oxidized, no special precautions were found necessary. 



Results. 



No. 1 12.71 



No. 2 12.34 



No. 3 12.66 



Mean 12.57 



Theory 12.48 



Greatest difference .... 0.14 

 Mean difference 0.09 



Chloride of Antimony, SbClg. 



Since the chloride of antimony is very deliquescent, the substance 

 was weighed in a closed tube, which was afterwards quickly transferred 

 to the perforated stopper of the apparatus, arranged as above described 

 so as effectually to protect the material from the atmosphere, till the 

 tube was dropped into the heated bulb. Determinations were made 

 in both air and nitrogen ; but the results seemed to show that no 

 advantage was gained by using nitrogen. 



Results. 



No. 1 8.0G 



No. 2 8.03 



No. 3 7.80 



Mean 7.96 



Theory 7.85 



Greatest difference .... 0.16 

 Mean difference 0.11 



Iodide of Antimony, Sblg. 



Pure material was prepared by subliming in a stream of carbonic 

 dioxide a quantity of an otherwise pure substance, which, by exposure 

 to air and light, had been partly changed into the oxyiodide. Several 



