353 



We may summarize some of the previous deductions in the 

 following way. 



When we add a new substance to an invariant unary equlibrium 

 E{x — 0) = F-{-L-\-G, then an equilibrium E = F^L+G 

 arises that is represented in the 7^, 7 -diagram by a curve iï"; this 

 curve begins in the invariant point i of the equilibrium E{x:=:0). 



When the new substance occurs in the liquid only, then curve Ë 

 coincides with curve {L) =:z F -\- G of the system E{x = 0). 



When the new substance is occurring in liquid and vapour then 

 curve E is situated in the regioti F; its direction is deliued by the 

 partition of the new substance between vapour and liquid. A curve, 

 like ic in tig. 2 may, however, occur only in very special 

 circumstances. 



When the uew substance is occuri'ing in liquid and solid phase 

 (consequently with formation of mixed crystals) then curve E is 

 situated in the region G; its direction is defined by the partition of 

 the new substance between mixed ci-ystals and liquid. 



When the new substance occurs in the three phases, then curve 

 E may be situated in each of the tiiree regions; its direction is 

 defined by the partition of the new substance between the three 

 phases. 



{To be continued). 



Leiden, Lab. of hiorgayiic Chemistry. 



