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ROYAL SOCIETY OF CANADA 



activities on both electrodes steadily rose as the pressure fell, both passed 

 through madmum values and both fell away again and approached 

 equality at the lowest pressure. 



The maximum activity for the cathode was obtained at a pressure 

 of 80 nuns., while that on the anode was not obtained until a pressure 

 of 17 mms. was reached. The maximum cathodic deposit, it will be 

 seen, too, was only about 2.75 times that obtained on the anode. 



TABLE III 



From time to time decay curves were drawn for the active deposits 

 obtained on the two electrodes, and it was always found that these de- 

 posits decreased in activity to half value in about 39 minutes, irrespective 

 of the electrode upon which the deposit was obtained. This fact, com- 

 bined with the similarity of form in the activity- curves for the two elec- 

 trodes, goes to show that with both electrodes the deposit always con- 

 -steted of the same transmutation product and that the difference in the 

 amounts obtained on the two terminals must be traceable to differences 



