( 645 ) 
8. We saw above, that when the composition of the vapour-phase 
is between that of the two liquids — which is the case, when the 
threephase-pressure is higher than the vapourpressures of each of the 
components — there must be a mazimum-vapourpressure after the 
coinciding of the liquid phases 1 and 2. That maximum may however 
still be present before the coinciding of these liquid phases, which 
is connected with the fact, that this maximum, which appeared origi- 
nally at lower temperatures as a minimum (see fig. 12) in the meta- 
stable region, has become gradually a maximum, and has moved 
outwards before the coinciding of 1 and 2. The vapour-phase 3, 
which was lying at lower temperatures always between 1 and 2, 
as to its composition, remains not necessarily between these till the 
moment of coinciding of 1 and 2, as was thought formerly, but 
may have come outwards long before (see also fig. 95). It would be 
very accidental on the contrary, when 3 coincided in the same time 
as 1 and 2 to one phase. In the case of phenol and water SCHREINEMAKERS 
has in fact shown experimentally this moving outwards’). 
In what manner the moving outwards takes place, has first been 
clearly shown and considered quantitatively by me?) in a series 
of figures, and this in the case of coexistence of two solid solutions 
and one liquid phase, whereas we have here — what of course is 
quite the same’) — the coexistence of two liquid and one gaseous 
phase. The figures 9—I4, drawn in the indicated communication 
(which refer to meltingeurves, and consequently are Zr-repre- 
sentations) are to be turned upside down, and the figs. 12, reproduced 
here, are obtained (fig. 12 of the mentioned communication is omitted). 
It will be remembered, that the case, which is realised with respect to 
liquid-vapour with phenol and water, is realised with respect to solid- 
liquid with Ag NO, + NaNO, (only the maximum of fig. 145 Le. at 
D has been already vanished there). 
Some months after the publication of my communication KUENEN *) 
came independently of me also to entirely the same view. What 
is described on the pages 471 and 472 of his communication, 
is quite identical with that, which I have described and represented 
on the pages 184—186 of the designed communication. 
Z. f. Ph. Ch. 35, p. 462—470 (1900). 
2) K. A. v. W. 27 June 1903. 
8) The calculations were based on the equation of state of van per Waars, so 
that the results of it are a fortiori applicable in the case of two liquid phases 
and one gaseous phase. 
4) K. A. v. W. 31 Oct. 1903. 
