26 



ART. 10. — K. IKEDA : STUDIES ON THE 



6i 



e, 



There are two positive values 

 of G which satisfy the equa- 

 tion, and these are represented 

 by two points on the line of 

 composition, situated on the 

 opposite sides of the point 

 Ci = r (Fig. 6, A). In systems 

 with more than two com- 

 ponents we have the additional 

 condition 



This, combined with the fore- 

 going equation, gives a solu- 

 bility curve of the form shown 

 in Fig. 6, JB„ for a ternary 

 system, j is a point at which 



In a quaternary system the 

 surface of solubility is a ruled ^^ 

 surface whose general form is 

 represented by Fig. G, C. 



When the solid is a ter- 

 nary compound ©i,,^©2v.,®3v3» 

 the curve of solubility in a Fig. 6. 



ternary system has the form 



shown in Fig. 7, A. The symmetry of the curve depends of 

 course on the symmetry relations between the coefficients vi, vo, 

 and v;î. 



