869 
2 + L + G, represented by curve da (fig. 2) 
Ee ode ig, oh 
Tr EE REN) 
Dt ie aant OM. bij: 2) 
The solutions of the first equilibrium are represented in fig. 1 by 
points of da, those of the second equilibrium by points of do. Curve 
ds is drawn vertically in fig. 2; the little curve with the arrows 
indicates that it may proceed as well a little towards the right as 
to the left. [This little are has the same meaning for the curve (@) 
in this and in the following figures]. 
It follows from the reaction: Z, 24+ G which may oecur 
between the phases of the equilibrium 7+ 74, + G, that curve ¢ md 
is a curve ascending with the temperature. With this reaction from 
left to right viz. as well the volume as the entropy increases. 
This curve dmt is at the same time the (J/)-curve of the ternary 
system IV + Z-+ A. Consequently on this curve is situated some- 
where the point m in which oceurs the invariant equilibrium: 
ZA Zn + A + Ln + G4 
of the ternary system. The two other singular equilibria: 
(A)=Z7414,1+04 Gand (=d ZH AH GG 
coincide with this curve 4m d. As the equilibrium (A) exists under 
higher pressures and at higher temperatures than the equilibrium 
(L), (A) is represented by curve md and (ZL) by curve mt in fig. 2. 
| Further we shall show this yet in another way |. 
The equilibrium (GC) == ZH ZJ A+ L goes, starting from m 
towards higher pressures and it may go as well towards higher as 
towards lower temperatures. [We shall refer to this later |. 
Now we have still to draw in fig. 2 the curves (Z) and (Z,). 
For this we consider the concentration-diagram of fig. 1. In this 
are represented the solutions of: 
(A)=Z7+2Z,+L+6 by curve md 
(7)=4,1t1A+L+6 ,, PR MA 
(7A)=Z+t+AtT+L+G , 5, mob 
We make the obvious supposition that the curves md and m 6 
go towards higher pressures, starting from m and that curve m7 
goes towards lower temperatures, starting from m. |We shall refer 
to this later]. 
The dotted curves are the saturation curves of Z,, Zand A under 
their own vapour-pressure; the little arrows indicate the direction, 
jn which the pressure increases. 
