244 ROYAL SOCIETY OF CANADA 



7. II. P. Mills:— T/k? chromic acid electrode. The E. M. F. of the hydrogen 

 electrode in chromic acid is found to be dependent on the rate of 

 diffusion of hydrogen to the platinum and on the (much quicker) 

 rate of reduction of the chromic acid by the hydrogen at the platinum 

 surface. 



In this connection the rate of reduction of chromic acid by hy- 

 drogen in presence of colloidal platinum has been measured ; it seems 

 to deix>nd only on the rate of diffusion of the dissolved hydrogen to 

 the particles of platinum in the suspension. 



8. A. F. Odell: — The condensation of oxalic ester with acetophenone. By 



means of special apparatus the yield of the condensation product was 

 determined, to test Claisen's hypothesis of equilibrium^ The experi- 

 ments are not yet finished. 



9. L. V. Redman : — The electrolysis of copper sulphate in sulphuric acid 



solutions with interrupted and allernaiing currents. The results of 

 the experiments with interrupted currents show that the relative 

 amounts of hydrogen and copper liberated at the cathode depend on 

 diffusion, and cannot be accounted for by Siegrist's hypothesis of 

 reaction velocities. 



10. R. B. Stewaet : — The Hydrogen electrode in acelic acid. The experiments 

 shew that the electrode is reversible ; and a special apparatus has been 

 constructed to determine the transport number of acetic acid by 

 measuring the E. M. F. of concentration cells. 



