231 



something in the mercury which can not be washed or filtered out. But 

 is removed by mercurous sulphate. The mercury from cell (6) was taken 

 out and placed in a tube and sparked by a large electric machine. Cad- 

 mium lines were very distinct in the spectrum. Thus it would seem that 

 polarization is caused by cadmium being deposited in the mercury and 

 that the recovery is due to the removal of the cadmium by the mercurous 

 sulphate. 



Indiana University, 

 Bloomington, Ind. 



