180 PROCEEDINGS OF THE AMERICAN ACADEMY. 



la this determination the only serious possibility of error is that the 

 zincic bromide may have contained a lingering trace of water in spite 

 of the elaborate precautions adopted to secure its absence. It is 

 hoped that before long a determination of the zinc as well as of the 

 bromine in zincic bromide may be made in this laboratory, furnishing 

 evidence upon this point. However, since the figure given above 

 aorees closely with the probable corrected result of Morse and Bur- 

 ton's investigation, as well as with the somewhat incomplete deter- 

 minations of Baubigny and Gladstone land Hibbert, the value 65.40 

 may be safely adopted for the present as the most probable value of 

 the atomic weight of zinc. 



