( 846 ) 

 Let us now take a region of fig. 1 such that the line 



d*y 

 dxdv 







occurs on it, and that this line has the position as drawn in fig. 6. 



Then the liquid branch of -— = lies on the right side ot the region 



dv 



&V m, • , 



at lamer volumes than those of -— - = 0. these two curves might 



dxdv 



d'y 



intersect on the left side. If now also the curve = = occurs , 



das' 



which will be the case if the temperature is low enough, and if 



d*y> </ 2 i|; , , , 



this curve intersects both =0 and = 0, we have the shape 



dxdv dv 



of the (/-lines as drawn in lig. 6, and there will again be formed a 

 complex plait, whose shape and properties we shall have to examine. 



4 



feo 



P 



6 r . 





'3*-*zzr ' 





...••• dv 



<L z Ko 



A. 



Strik-p-lijn = loop-p-line. 

 Fig. 14. 



