(63) 



characterize the so-called ideal mixtures, are therefore all satisfied 

 when 



^ [/a =1 a V. 



This yields : 



when it is permissible — for liquids far from the critical temperature 

 — to replace v by b. Hence we get : 



or 



{b, — b,) [/a, = {y/a, — [/a,] 6,, 

 or also 



6, [/a^ =: b^ l/a,, 

 hence 



b, ~ b,' 

 from which w^ see, that the case of ideal mixtures occurs, when 

 the critical pressures of the components have the same value. 

 e. Finally 



b' fa\2{b, \/a, - b, \/a,y 

 be 



)a-' \b ) 



a 

 SO we see that also — will be a linear function of x, when 



b 



6, j/ttj r= 6j |/a, or Pi = p^. In this way also c of § 2 has been proved. 



(June 21, 1906). 



