( 667 ) 



parison of the observations at thai temperature T with the result of 

 computation that 



T k —T=t k T k —r. 



T 



At the general survey for 26° we have applied to t 



'/'/, 



a cor- 



rection = Af, so that A t = 0.0106 0, when = lO(t — 0,9) for 

 O<0<[1, whereas At = for all other values of 0. The correction 

 At to t was accompanied by a correction A o to o and Ap to p, so 

 that Ap = 0657 6 and A» = 0.0379 6, which together represent a 

 regular increase of the corrections from t = 0,9 to the critical state. 

 For the detailed model of the if'-surface for 26°, on which only the 

 part from # = 0,35 to # = 0,65 was represented, we used everywhere 

 the same correction viz. A t = 0.0106, Ap = 0,0657, A» = 0,0379. 



§ 3. Critical quantities for the mixtures. Kuenen has determined 

 the plaitpoints T p i. X) p p i x ,v fi i x , for some mixtures with the molecular 

 concentration x. T rx , p,x, v rx , the critical points of contact, and 

 The, pkx, Vkx the critical states of the mixtures taken as homogeneous 

 differ so little *) from these values, that this difference may be dis- 

 regarded for our purpose, and so they are also known for the 

 mixtures investigated by Kuenen. 



i) This has been fully treated hy van der Waals, Cont. II, § U 



