(159) 
relation of GALITZINE-BERTHELOT, though the matter can really not 
be decided before the theory has proceeded so far that it will 
determine the value of the correction-terms more accurately. 
Finally it is noteworthy that seen from below the given curve 
on the right side is concave, though very slightly}). So it has an 
inflection-point. 
From the theory of van DER Waats the appearance of such 
inflection-points under some circumstances was to be expected ®); 
OsTWALD, on the other hand, denied their possibility. So our results 
confirm the before-mentioned theory, as the experiments of RAouLT *) 
on mixtures of ether and very slightly volatile substances did before *). 
Yet we wish to state this latter point with some reserve. When 
determining the points «= 0.955 and 0.898, a difficulty was added 
to those already mentioned viz. that through the very considerable 
sloping of the pz,-curve the composition of the mixture when 
boiling, had a tendency to change in consequence of the extraction 
of the more volatile ether by distillation; the more so as, these 
experiments being made only lately, our coolingwater was consider- 
ably warmer than in previous experiments made in February and 
March. The reason why we think that we are justified in con- 
sidering these two points as accurate is only that they as well as 
the previously determined point for e= 0.695 lead to the same 
result). We hope, however, to return to this point afterwards. 
1) This particularity is far less obvious in the subjoined representation on a 
reduced scale than in the original drawing. 
Aker pe 110: 
5) Zeitschrift f. phys. Chem. 2. p. 353. 
*) Zeitschrift f. phys. Chem. 36, p. 60. 
>) Comp. note on the preceding page. 
(August 6, 1901). 
