248 J. JV. Gibbs — Equilibrium of Heterogeneous Substances. 



Hi—Ci — a^ c, +a| n^—E^ 



a, , a, ttjt 



p = a^ e t e 



a., ^ O'i o,>t 



4- r/g e ' t e 



+ «3 e t ^ e , (353) 



where Aj and X.^ have the same meaning as on page 230. 



{I'o he continued.) 



ERRATA. 

 Page 167, formula (168), for m, read fi^. 



" formula (169), for to,, . . . m„_j read/z,, . . . //«— i- 



Page 239. formula (333), for— read _iL. 



t ttat 



