105 



The per cent, yield of selenic acid from the lead selenate was best 

 with room temperature, thin layers of lead selenate upon the cathode, and 

 occasional stirring. 0.3 gm. of lead selenate when electrolysed with a cur- 

 rent density of 0.3 amperes per sq. dec. gave a yield of 95.4% of the theo- 

 retical value. Under the same conditions 3 gms. of lead selenate gave a 

 yield of 78.3%. 



University of Indiana. Nov., 1907. 



