( 428 ) 



We then iind 



Ö5 1 



2 Wj 



With n^ -\- ??2 = 1, ^/j = 1 — .'-, v., = ■'■ we obtain : 



or after simplilication: 



M, = [(.«i)o + !hA - •^•' (Mn - 2 fe„ + M,,) + RTloa (1 - .t')- 

 III analogy wilii (4) wo may tiicrctbre write: 



li,=:e,- c, T + (t, x' + 7? T lor, (l-.r). 



The terms with T hxj T liave not been taken into consideration, 

 because tliev disappear on account of the equably of the (pianlities 

 k^ and li in the Hipiid and in the sobd phase. 



If, for tlie sake of a ch)ser aj>pro.\imation, we take uj» some higher 

 powers of ./•, we linally get : 



(solid tin) n—e—cT ) 



(tin in liquid amalg.) (i-e^-cJ'-^{a,x'-^i3,y-^r,.v')-JrRTlog{l-x)] ^''^ 



Equating, \n e tlien tind as in § 1 : 



q^-yT=- {a, x'^ -^ ^. ■''' + V: -'') - ^ '^' ^og (!-.>•), 

 or 



Y—Rlog{l—x) 

 The iieat of fusion of the solid tin in the amalgam is now [ilainly : 



^y = '7o + K ••'•■^ + i?i ■'•' + 7: -O (7) 



For .t' = 0, {()) [tasses into 



lo 



7 

 so we mav again write: 



RT 



or with ^ == rf, — — ,j, — — 7 • 



7o 7o 70 



T— 7' — -^ — -, (8) 



— » \—6log{\-x) 



