276 



PROGRESS IN MICROSCOPY 



slightly above the melting point of the more fusible substance A. 

 In the case shown in Fig. 1 1 .9 meking begins at the left and gradually 

 extends to the right. 



Liquid 



PreDOrafion 



Fig. 11.9. Temperature-composition diagram. The substances A and B are miscible 



in any proportions (type I). 



PrepOrofion 



Fig. 11.10. Temperature-composition diagram. The substances A and B are miscible 



in any proportions (type II). 



