80 AET. 10. — IKEDA : CHEMICAL THEOEY OF SOLUTIONS. PAET I. 



(2) Fusion Surfaces. 



The equation for the fusion surface of a normal component 

 can be obtained by expressing d in equation (60) as a function 

 of temperature. Hence from (17) we have 



y {l + {v~\)(p{^,%,T,x)] =eR ^ ^^ ^' L 



This equation has been found by Hieobe^^ to represent the 

 fusion aurface of naphthalene with tolerable approximation, the 

 temperature of fusion calculated differing by not more than 1° 

 from the observed values. 



The fusion surface of the associated component will be re- 

 presented by equation {ß5>)y because the fusion point is quite 

 independent of y. In the system studied by Hieobe the fusion 

 surface of phenol is nearly a plane, which deviates considerably 

 from the calculated surface. 



1) Loc. cit. 



