184 SCIENCE PROGRESS. 



pressure of solutions, and that the exceptional behaviour 

 of electrolytes is due to this cause, it must be urged that 

 the results of the thermodynamical treatment of this ques- 

 tion have not up to the present been conclusive. A full 

 recognition is necessary of the fact that in accordance with 

 their differences in composition it is necessary to sharply 

 divide liquids into two different classes. The treatment 

 applied to liquids of the one class cannot be indiscriminately 

 extended to those of the other, for if this is done the results 

 obtained will be of an altogether misleading character. 



Holland Crompton. 



