G74 



would occur witli an angle larger than J80°; I have set forth in 

 the mentioned paper that this is impossible. When with the aid of 

 the quadruple point rule we examine what succession of the phases 

 would appear according to tig. 4^/, it appears that no melastable 

 prolongations occur between SShL, and vSL,G, that the two-phase 

 coexistences in this region are: G-f-S, «S + Ij, and L, -[- Sp, and 

 that the succession of the phases is given by GSL,Sb. 



In an analogous way it would follow from fig. 4/; that the order 

 of the phases would be SGL,Si{. This order indicates diminishing 

 carbonic acid content, because Sb i-epresents solid p-toluidine. That 

 the compouml S would be richer in carl)onic acid than the gas phase, 

 which practically consists of pure carbonic acid, is excluded ; p-loluidine 

 has a very slight vapour tension (b.pt. 200°) at this femperaliire, 

 and the content of p-toluidine in (he vapour is, therefore, very small. 

 The only possibility is, therefoi-e, given by lig. 4^/. I have, therefoi-e, 



TABLE 4. 



Quadruple point SLjLoG 31.5° 70 atm. 



SSBL2G 29.7° 44 atm. 



tried to find the reqnired three-phase equilibrium in the region between 



