4 ART. 12. — H. HIROBE : ON THE FUSION SURFACES OF THE 



efficient. T. Yamamoto^^ lias lately studied the fusion curve of 

 naphthalene in the system naphthalene-phenol, and concluded 

 from his data that the reaction is 



3 (C,HoO) ^ (CoHoO)3. 



But as there could be only one concentration corresponding to 

 each temperature in the system studied by him, he was unable 

 to study the isothermal relations. 



In the present study tlie fusion surfaces with naphthalene 

 and phenol as solid phases have been determined, necessary 

 precautions being observed in the measurement of the temperatures 

 of equilibrium. From the data so obtained the polymerisation 

 of phenol in the solution has been deduced. 



The partition of phenol between water and chlorobenzene in 

 relatively concentrated solution lias also been studied, and the 

 results are compared with those obtained in the foregoing in- 

 vestigation. 



I. The Fusion Surface of the ternary System, 

 Naphthalene-Chlorobenzene-Phenol. 



1. Experimental. 



A. The Materials. 



Naphthalene was first distilled, and then the portion with 

 a constant boiling point w^as recrystallised from a large quantity 



1) See the foregoing paper. 



