TRANSACTIONS OF SECTION A. 589 



2. On wme points in Electrolysis and Electro- convection. 

 By Professor G. Wiedemann. — See Reports, p. 347. 



3. On Ohm's Larv in Electrolytes. 

 By G. F. Fitzgerald, F. U.S., and Fred. Trodton. — See Reports, p. 345> 



4. Further Researches concerning the Electrolysis of Water. 

 By Professor Von Helmholtz. 



5. Experiments on the possible Electrolytic Decomposition of Alloys. By 

 Professor W. C. Roberts-Austen, F.B.S. — See Reports, p. 341. 



6. Experiments on the Speeds of Ions. By Professor 0. J. Lodge, i^.i?../?. 



7. On Chemical Action in a Magnetic Field. By Professor H. A. Rowland, 



8. On the Action of an Electric Current in hastening the Formation of 

 Lagging Compounds. By Dr. J. H. Gladstone, F.B.S. — See Reports, 

 p. 344. 



9. Experiments en Electrolysis and Electrolytic Polarisation. By W. "W. 



Haldane Gee, B.Sc, Henry Holden, B.Sc, and Charles H. Lees, 

 B.Sc. 



This is a preliminary notice of experiments that are in progress in the Owens- 

 College Physical Laboratory. The experiments fall under four heads : CA) elec- 

 trolysis under pressure ; (B) time-rate of fall of polarisation in closed circuit ; 

 (C) irreciprocal conduction ; (D) production of a dense oily-looking liquid iu 

 electrolysis with palladium electrodes. 



(A) Numerous experiments have been made in order to determine the variation 

 of resistance and polarisation of a sealed voltameter in which dilute sulphuric acid 

 is electrolysed between platinum wire electrodes, it being thus subjpcted to the 

 pressure of the evolved gases. It was found that the resistance markedly decreased, 

 and the polarisation also decreased to a slight extent. These changes may, how- 

 ever, it is thought, be due to change of temperature, the influence of which would 

 appear, from later experiments, not to have been fully eliminated. 



In two cases no change whatever was perceived — firstly, when two platinum 

 plates were used as electrodes ; and, secondly, when two voltameters were connected 

 together, forming a sealed vessel, one voltameter being used to increase the pressure, 

 ■while observations were made on the other voltameter. 



As it has not been possible to obtain glass tubes sufficiently strong for the high 

 pressures desired, an apparatus of gun-metal has been constructed. This apparatus, 

 which is fitted with a Bourdon's gauge recording to six tons on the square inch,. 

 may also be arranged for pressure experiments in general by attaching to it, by 

 means of a strong metal tube, a suitable receiver. 



In two of the experiments where the pressure had reached between 200 and 300 

 atmospheres, the evolved oxygen and hydrogen gases combined with explosion, 

 although precautions had been taken to prevent the gases from coming into contact 

 with the platinum, except in the liquid. 



