( 477 ) 



Fig. 1. Schematic p-tf-diagram for 



Gholesterol-Laurate. 



the isotropous fusion is cooled; this indicates, therefore, themomenl 

 where the stable phase B is replaced by the as yet still less stable 

 phase A, which will soon afterwards be the more stable one; 

 a fact which may be perhaps important in the future for the 

 explanation of the analogous phenomena observed in the separa- 

 tion of two liquid layers and the coagulation of a colloidal solution. 

 Indeed, the transition at (t s ) presents quite the aspect of a gela- 

 tinising colloidal solution. The temperature of this transition point 

 may be determined, but not sharply, at 87°. 8. The temperature at 

 which, when the solid substance melts, the liquid may be still 

 kept turbid, owing probably to the presence of the meta-stable plate- 

 like crystals of' S, was determined at 90°.6; the solidifying tem- 

 perature (/,) lies at 82'. 2. 



32 



Proceedings Royal Acad. Amsterdam. Vol. IX. 



