296 



Finally we could still treat the general case that the new sub- 

 stance forms not only mixed crystals with i'^but that it is volatile also. 



It follows from figs. 3 and 4, in connection with the theories 

 discussed in the beginning of this communication that curve E can 

 go in all directions, starting from point /. 



In order to define {dT)x we must still include in (36) the term 

 {l\V -^ l\V')x; tlien we get again (40) approximately unless x, is 

 extremely large. 



Consequently in this case also the figs. 5 and 6 remain valid, 

 unless the threephases-triangle § (?, f/, becomes very narrow and the 

 concentration of the new substance in the vapour is extremely 

 large. 



[To be continued). 



Leiden, Inorg. Chem. Lab. 



