406 



J. H. Reedy — Anodic Potentials of Silver. 



Experimental Procedure. — 200 rc of 0*5 molar sulphuric acid 

 was introduced into the cell, and to this was added by means 

 of a pipette a definite amount of potassium halide solution, 



Fig. 



Fig. 2. Diagram of the electrolytic cell. 



whose halogen value had been carefully determined by pre- 

 cipitation with silver. The silver anode and the platinum 

 cathode were weighed and put in place. After starting the 

 motor which operated the rotating anode, the electrolytic cur- 



