( 592 ) 

 T ABLE XXVI. 



For tliis iipplication of the formulae of Comm. W. 75 it should 

 be borne in mind that in the derivation of them we have used the law 

 of corresponding states, while in § 4 (p. 587) it appeared that already 

 at the critical volumes deviations could be detected. As long as .v, 

 however, is very small, the points P for the different mixtures will 

 lie in an area Avhere according to Kamerlingh Onnes (comp. § 4) 

 the law of corresponding states may be considered to hold at least 

 to the first approximation, so that then we find an u and a /? for 

 the critical points for that area. The same may be said of the points 

 B. From the numbers given it appears that the values of « and /i 

 with relation to those points, at least to the first approximation, agree 

 with those relating to the critical point of the mixtures for the area 

 of the larger volumes. 



For the slopes on the />7'-diagram for the plaitpoint- and the i»oint 

 of contact curve with small x, we find : 



'£üm =-«.451 , ^Y^) =-0.044, 



values which agree sufficiently. 



For the slopes of the curves which in the same diagram connect 

 the points K and P we find : 



Px,jl—Pxk 



For the mixture 0.1 . 



J xfA - ^ xk 



For the mixture 0.2 : 

 P^or the curves which connect K and R : 



-r-l 1 . r^ A P ■'■'>' Pxh 



lor the mixture 0.1 



= 2.021 

 2.561. 



= 1.421 



For the mixture 0.2 : 1.336. 



From either side, therefore, there is an approach towards the \ alue 

 1.610, which both quotients must have for very small x. 



§ 9. From the foi-mulae given in § 7 it \vould follow that the 

 largest |)laitpoint pressure to be expected in mixtures of carbon 

 dioxide and oxygen would be 132 atms. (with .r = 0.57), while the 

 largest value for 7'„— ^V' would be expected to be 15'. 7 C. (with 



