( 208 ) 



that meetings take place between solubility lines and plaitpoint lines, 

 but to this I hope to come back afterwards. 



In the lower parts of figs. 8, 9 and 10 the projections of the 

 solubility lines on the 7-a?-plane or the melting curves under the varying 

 three phase pressure are represented. From this we see that these 

 lines, commencing at the components or the combination, must not 

 always be drawn descending from the beginning, but that they will 

 often first ascend, and descend after having reached a maximum. 



These particularities have disappeared when we trace the melting 

 curves at constant pressure or a /-.I'-section at constant p. 



Amsterdam, June 1905. Chemical Laboratory of the University. 



(August 17, 1905). 



