JOURNAL OF THE COLLEGE OP SCIENCE, IMPERIAL DNIVERS1TÏ", 

 TOKYO, JAPAN. 



VOL. XXV., ARTICLE 12. 



On the Fusion Surfaces of the System Naphthalene- 



Chlorobenzene-Phenol, and the Molecular 



Association of Phenol. 



/ 



By 

 H. Hirobe, Rigahishi. 



With 2 platcii. 



Introduction. 



Tliere is a rather large number of ternary systems, whose 

 fusion surfaces have been investigated. But they have been 

 studied mostly in the light of the phase rule, which is avowedly 

 qualitative ; and the chief weight has been laid on the deter- 

 mination of the composition and the stability range of the solid 

 phases. The chemical reactions which take place in the liquid 

 phases (excepting dilute solutions) have hitherto been studied 

 only qualitatively, though it is quite clear that more exact 

 knowledge is essential to the elucidation of the quantitative rela- 

 tions of the heterogeneous equilibria. This is doubtless due to 

 the difficulty of getting more precise insight into the state of 

 homogeneous equilibrium in concentrated solutions. 



When the liquid phase is a dilute solution, the quantitative 

 relations of the heterogeneous equilibria can be calculated with 

 great precision, provided the chemical reactions in the solution 



