1913-] HINRICHS— TRUE ATOMIC WEIGHT OF BROMINE. 551 



1910, for an example and note the interesting story of its wanderings 

 m 1907 and 1908.) This may be sufificient for the present to direct 

 those readers who may need such reference. 



We now return to the simple practical details necessary for 

 carrying out the work of determining the small departure e for 

 bromine. 



VII. The Atomic Ratio R, and its Variation A 



To express the chemical reaction used, we first take the departure 

 as zero (that is Br = 8o exactly and H^ 1.008 to the nearest thou- 

 sandth), as we have shown it to be in our history of all determina- 

 tions for hydrogen made in the century past.^^ This gives us R and 

 A as shown in Table III. by elementary mathematics. 



81.008 81.008 



11 Revue gen. de Chimie, 1910, 377-389. 



