method described in the preceding paper. 389 



From a measurement of the constants a direct estimation 

 might be made of the diffusion constant of any one salt. 



By plotting the logarithms of the time and the logarithms of 

 the conductivities the curves for two different salts will be found 

 to be the same, though situated at a different position. The 

 amount that one must be displaced along the axis of time in 

 order to coincide with the other gives the ratio of the diffusion 

 constants : the amount of displacement along the axis of con- 

 ductivity gives the ratio of the conductivities. 



