1205 
ze 
Kgs. 
its own vapour-pressure have no more a point of minimum- or maxi- 
mum-pressure, the pressure increases from n towards / (figs. 6 and 7). 
The point of minimum pressure follows therefore, in figs. 6 and 7 
a curve mS, the point of maximum-pressure follows a curve MS. 
The equilibrium ER consists, therefore, of two branches, which meet 
in S; we may, however, also say that only one single turning-line 
exists ER = mSM, which has a singular point in S, 
Later we shall show in general that the two branches mS and 
MS of a turning-line ZR touch one another in the singular point S 
and that the tangent in JS is situated between the two branches. 
The region E in fig. 7 is now one-leafed, except in the part, 
situated within the turning-line, which is three-leafed. ‘f course this 
is only true in so far as this part is situated between the limit-lines. 
Leiden, /norg. Chem. Lab. (To be continued). 
Chemistry. -— “J/n-, mono- and divariant equilibria’ XVII. By 
Prof. F. A. H. SCHREINEMAKERS. 
(Communicated in the meeting of April 28, 1917). 
Equilibria of n components in n phases. 
Now we shall consider more in detail the equilibrium: 
BH Ree PTA ed 
which we have already discussed in the previous communication. 
We represent the composition of: 
(eid 
