795 



on the liquid and vapour lines wiiicli indicate the liquids and the 

 vapours coexisting with £), + 6' and D^ -\- B, from which points 

 new eutectic lines start indicating the following coexistences. 



L\L^ and G'Jjt^ for liquid or resp. vapour phases with 6'-+ /J, 



L\L, „ G\G, „ „ „ „ „ „ „ B-\-D., 



and L\L\ ,. G\G\ „ „ „ „ „ „ „ A + A 



It might happen that now again critical endpoints occur, and 

 now by the side of D^ as solid substance, but this case we leave 

 out of consideration for the moment. 



It is still noteworthy here that the critical endpoint curve might 

 also have been drawn in this way, that it intersects the lines G\, 

 G\ and L\ L\. This intersection would then, however, have had 

 no physical signification, as the latter lines refer to other tempera- 

 tures than those for which the critical endpoint curve holds. 



Dj the least volatile ; Dj less volatile than B and C ; 

 B more volatile than C ; A very volatile. 



8''' C<is('. We iv'dl, however, examine the case that presents itself 

 when in the preceding case the ternary compound D^ decomposes 

 before the critical endpoint q is reached, and when at higher tem- 

 peratures critical phenomena with solid /)., occur instead of with 

 solid Dj. When this case presents itself fig. 2 is changed into fig. 3. 



