358 



to nn nrlntrnrij solution in mhich A (VhJ B arr in intcrnni cquili/rriiim, 

 fmt L'i'ry spi'ciallij to tli-c solution A„. IT*' therefore take a part of 

 the saturate soiutioii inith some <-i\i/sta/s of the tuio solid phases, 

 and hi the internal equilihrium set in. at the same temperature, at 

 wlucli one kind of crystals disappears (except at the point of 

 transition). We now determine the concentration of A and B in 



Fig. 2. 



this solution, and thus find -, in which it is perfectly indifferent 



:'/ 



wliethcr these concentrations are great or small. If we now calcu- 

 late tiic quotient : 



icL 



Xl 

 Yl 



we know witii perfect certainty that widiout any e.rception A will 

 be stable when /\>1, and that B will be stable when /<C 1- 



^^ 



