136 ROYAL SOCIETY OF CANADA 
of glass tubing immersed in the water bath containing the cell. Thus 
it assumed the uniform temperature of the cell before entering, and 
any possible error due to current heating was reduced to a minimum. 
It has been shown by Hall that the motion of an electrolyte pro- 
duces no change in its electrical resistance, although the results of 
Bosi* indicated such a change. Hall? repeated carefully Bosi’s 
experiments, but with negative results. In several of our experi- 
ments we varied the velocity of flow, but could detect no difference. 


TO FLASK 
T-V Slide, 
Fic. 1.—THE FALL OF POTENTIAL METHOD FOR MEASURING THE RESISTANCE 
OF AN ELECTROLYTE. 
In fig. 1 we give a diagram of our cell as well as a sketch of 
the general electrical connections. The cell consisted of a narrow 
tube 14 millimetres in diameter and 15 centimetres long, fused to 
tubes of 3 cm. in diameter. Rubber stoppers closed the two ends. 
Through these rubber stoppers heavy platinum wires were passed, 
connecting with plates of platinized platinum foil. Potential ter- 
minals of platinum wire were fused into the glass of the small bore 
tube. The electrolyte entered the cell from a reservoir after passing 
through the glass spiral. A flask at the outflow end collected the 
solution which dripped from a tube inserted in the rubber stopper. 
Thermometers were placed in the inflow and outflow ends, and the 
temperatures read simultaneously during the measurements. The 
complete cell was immersed in a bath through which water was made 

1 Nuovo Cimento, 5, 249 (1897). 
2 Physical Review 7, 246 (1898). 
