192 Dr. Kuenen on the Critical Phenomena of 



41. Quite close to this temperature (below and above it) 

 similar complicated phenomena will exist. A little above 



Fig. 11. 



r* 



25*8 there are even some mixtures which show first r.c. I. 

 and then r.c. II. successively with compression. But as 

 soon as the plaits have moved so far that there is no #-line 

 cutting both plaits, the critical phenomena become the 

 ordinary phenomena for a mixture (r.c. I. or II.). 



42. The ^9-^-curves in the neighbourhood of A have a more 

 complicated character, corresponding to the behaviour of the 

 plait (fig. 12). The two branches of the experimental plait- 

 point-curve meet in a singular point. The border-curves show 

 a doubling, which disappears at a small distance from A. A 

 fuller explanation of the figure seems hardly necessary. For 

 clearness' sake only two border-curves have been drawn in 

 the figure on an exaggerated scale. 



43. How is it that in my experiments the mixtures did 

 not show any of those critical phenomena partly of a so com- 

 plicated nature, and almost behaved like pure substances 

 near their critical points? (§ 31). The reason lies at hand : I 

 have pointed out the smallness of the increase of pressure, i. e. 

 the approximate parallelism of the straight lines in fig. 3 (§ 30), 

 and the exceeding narrowness of the loops (border-curves) in 

 fig. 2 (§ 25). Accordingly, as will be noticed in both figs. 2 

 and 5, the two critical points F and R lie close together, and 



