82 ROYAL SOCIETY OF CANADA 



It will be observed that in both the above series of compaiisons the 

 ag-reeraent between the observed and the calculated values is ver}^ satis- 

 factory for the more dilute solutions. As pointed out above, the more 

 concentrated the solutions, the more must the ionic velocities of each 

 electrolyte be modified bj' the presence of other electrolytes in the solu- 

 tion, and the greater, therefore, must be the error involved in taking the 

 specific molecular conductivity' at infinite dilution, determined by experi- 

 ments on simple solutions as being its value when the electrolyte exists in 

 a complex solution. 



I am engaged at present, with the assistance of students in my 

 laboratory, on a series of observations and calculations of the conduc- 

 tivity of solutions containing two electrolj'tes with no common ion. We 

 hoped to have them ready in time to include the results in the present 

 paper, but have been prevented from completing them at a sufficiently 

 earlv date. 



