554 



In order to elucidate the relations, existing on the curve he, t 

 analysed four solutions of' this curve with their corj-espondinj;' solid 

 phases ; as the conjugation-lines licjuid-solid make a very sharji angle 

 with the side aniline-hydrochloric acid, no conclusion with respect 

 to Di.i and D;o.ii could be arrived at. 



Theoretically two saturation curves should meet each other in an 

 angle ; sometimes, however, as also m this instance, the saturation 

 lines foi-m practically one single continuous curve. 



In the binary system Water-Aniline the solution separates into 

 two liquid layers. On adding hydrochloric acid the two layers 

 approach each other in composition and a binodal curve results, as 

 is indicated schematically in Fig. T. The extreme points of it are 

 situated on the side Water-Aniline, its plait-point within the triangle. 

 From the figure can be seen, that, in agreement with the theory ^\ 

 the saturation curve in the vicinity of" the plait-point is bent in the 

 same direction as the binodal curve. 



Vi/ 



Fig. 1. 



As the two curves do not intersect, a two-layer-"system, which is 

 saturated with a solid substance, will not exist at 0°. 



The researches are continued at different other temperatures amongst 

 others at 25° and 35°. At 25° neither the hydrate D5.3.1 , nor the 

 double salt Dq 1 exists. On the other hand other combinations at 

 these temperatures have been proved to exist. As far as I have 

 determined, there exist at 25° amongst others : 



^) V. A. H. Sghreinemakers, Die heterogenen Gleichgewichte von Bakhuis Rooze- 



BOOM 1112 118. 



