I UI 



We see that at all (he temperatures mentioned here tliese li(|iii(l 

 lines exhibit the type^of negative liquid lines ^), as was met with 

 by KoRNSTAMM and van Dalfsen") for the system ether-chloroform, 

 and by Gerlach -) for water and glycerin, while as Bakhuis Roozeboom 

 remarked, such a line may also be derived from the investigation 

 carried ont by Schreinemakers^) for the system acetone-phenol. 



Nor do licpiid lines of the (/Ai')7'-''^6<^tions give the least indication 

 of the existence of compounds in the liquid phase, and it is most 

 remarkable that this even applies to the liquid lities corresponding 

 to a temperature of — 70^, so only 9° above the temperature at 

 which the compounds separate out of the liquid; an indubitable 

 proof therefore that the compounds found undergo a dissociation in 

 the liquid, much greater than would have been expected. 



To complete the investigation the most important lines ofthePT- 

 projection of the spacial figure were also determined, the result of 

 which is expressed in fig. 5, in which the three-phase lines of the 



P' 



Fig. 5. 



two compounds are very apparent. The difference in ti'iple point 

 pressure of (he two compounds amounts to ± 17 m.m. Hg. 



Finally also the plaitpoint curve was partially determined ; as was 

 to be expected this curve does not present any particularity either. 



Anortj. ('hem. Laboi'atori/ of the University. 



Amsterdam , May, 1914. 



1) Bakhuis Roozeboom. Die Heter. Gleichgew. 11 40 (1904). 

 ") Verslagen d. Kon. Akad. v. Wei. 1901, 156. 

 ■^) Z. f. anal. Chem. 24, 106 (1885). 

 ^) Z. f. phys. Chem. 39, 500 ^1902;. 



