240 ON THE BOILING POINTS OF AQUEOUS SOLUTIONS OF ELECTROLYTES. 



By the aid of these curves the ionization at which hydration commences has been 

 determined, and thence the concentration has been read off from concentration ionization 

 curves for several salts. 



(12) The computations which have been made of the number of molecules of water 

 combined with one ion for the ammonia salts are in close agreement with those obtained 

 by Garrard and Oppermann, which has been shown by a comparison of data. For the 

 salts of lithium the data I have obtained indicate a very much higher hydration for 

 these salts, notably for the bromide and chloride. 



Finally, I desire to return my best thanks to Professor MacG-regop, under whose 

 kindly and genial direction and interest this research was carried out, for his helpful 

 discussion of difficult points and invaluable working hints. 



Physical Laboratory, 

 University of Edinburgh. 



