214 PROCEEDINGS OF THE AMERICAN ACADEMY. 



obtained in this paper. From all the experiments here described the 

 number 79.953 seems to be the most probable value for the atomic 

 weight of bromine. 



In conclusion, attention may be called to the fact that a diminution 

 in the atomic weight of bromine raises slightly all atomic weights 

 resulting from the analysis of metallic bromides by precipitation with 

 silver. 



I am deeply indebted to the Carnegie Institution of Washington 

 and to the Cyrus M. Warren Fund for Research in Harvard University 

 for assistance in pursuing this investigation. 



Chemical Laboratory of Harvard College, 

 Cambridge, Mass., May 18, 1906. 



