1892. W. C. D. Whetham. 



Ionic Velocities. Proc. Roy. Soc, ji", 284. Zeit. phys. Cliem., //, 220. 

 Phil. Trans., 184, A, 337. 



The author measured the velocity of the meniscus between 

 pairs of solutions of electrolytes, first with direct, and then with 

 reversed current. The apparatus consisted of two vertical tubes 

 joined by a third much narrower tube bent parallel to the others 

 for the greater part of its length. Two solutions of equal spe- 

 cific resistance were placed in the apparatus, the specifically 

 heavier below the other. The surface of contact lay in the 

 narrow vertical tube, where the fall of potential per cm. could 

 be determined. 



In the following table, the salts experimented with are named 

 in the first column, and in the succeeding columns in order are 

 given the concentrations, the solvent (W = water, Am = aqueous 

 ammonia, Al = '* alcohol of 0.05 strength "), the ion to which 

 the rate of the meniscus movement was ascribed, the number of 

 experiments, the observed velocity in cm. per second per unit 



