410 



into the vapour branch which extends towards higher water concen- 

 trations and is not drawn in the figure. In an analogous way the 

 P-x projection of the phxitpoint curve and of the liquid branch of 



230 



the three-phase region is indicated in fig. 3. It appears again that 

 both lines have a perfectly regular course; the projection of the 

 plaitpoint line has a feeble curvature; it is concave seen from below ; 

 here too the liquid branch of the three phase equilibria is connected 

 will) the not drawn vapour branch by means of a horizontal tangent. 



