nOODWIN AND IIASKKLL. — COXDUrTIVITY OF SOLUTIONS. 415 



Tlie values for zero concentration or infinite dilution are extrapolated 

 from those for 0.00025 normal under the assumption that the change 

 between these two limits of concentration stands in the same ratio to 

 that between 0.00025 and 0.01 normal as in the case of neutral salts; 

 this ratio having been already derived by Kohlrausch. These values 

 are less than one per cent lower than those of Kohlrausch and are be- 

 lieved to be substantially correct. That derived by Xoyes and Sammet 

 from transference experiments for hydrochloric acid (395.5), on the 

 other hand, i.s, for some reason as yet unknown, four per cent higher. 



In conclusion the authors desire to express their appreciation to the 

 trustees of the William E. Hale Research Fund for the grant from that 

 fund which enabled this research to be carried out. Also to Professor 

 Xoyes for many valuable suggestions received from him in the course 

 of the work. 



