RICHARDS. — ATOMIC WEIGHT OF STRONTIUM 



387 



Heights of Columns appearing Alike 



Some series were more accurate, others less so, than these, which 

 serve to give a fair idea of the probable error of the method. 



The details of the analysis must be evident from what has been said. 

 The method is similar to Stas's third method for the determination of 

 chlorine,* except that of course the opalescence is very much fainter. 



Below are given the tables containiuor the data and results of the 

 three series ; these will be comprehensible without further remark. 



Ratio of Strontic Bromide to Silvee 

 First Series. Volhard's Method. 



* See these Proceedings, XXIX 86. 



