( 205 ) 



ij I 



on (lie side of the small volumes of - — = 0, and between two low 



du* 



temperatures. If we denote these temperatures by 1\ and r J\ , then 



contact does not begin before 7', ; between 1\ and 1\ there is 



intersection, and at T, there is again contact. So at 7\ the curve 



dp 



— = proceeds more rapidly towards larger volumes with rise of 



dx 



temperature, but at T 7 , on the contrary, the curve - - = 0. 



dx* 



In agreement with fig. 24 (Contribution V p. 134) the value of x 



dp 



for the minimum volume of — = is then smaller than that of the 



dx 



points of contact; and the point to which the locus of the points of 



ii dp 



contact contracts lies then on that portion of — = that proceeds 



dx 



to greater volumes with increasing x. 



fd*p\ 

 We may verify this by showing that I — is positive for this 



.r„r„f db Y d *d 



, , MRT[ — — 



fd*p\ n \dxj dx* / ( /n\ 



f ,0,n '' As {&).= 2 (»-b)> ~ v ' {w a poin ' of [£).• oi ' for 



MRT d ± * 

 ... d& dx fd*p\ 



which — - = — , the sign of — - ) will depend on : 



(v-b)- v* \dx*J v 



or on 



or on 



Tf t a k , . B l ( n + 3)' , n+3 



li, as was found above, we take — = — and ,r = 



C 8 n- — 1 4,ufl) 



14* 



