Equilibrium between four substances

There remains one problem, that of applying the conditions of equilibrium just found to the phenomena ot equilibrium treated in the first section especially in the more complex cases last dealt with, that three or four substances take part in the equilibrium. Since the treatment for the case of three substances is contained in the lectures on the formation and dissociation of double salts, which have been published separately b we will here discuss only the case of chemical equilibrium between four substances, in connexion with the former example of two salts which sufier double decomposition. We may then generalize the results of the particular case in Lowenherz s... 

---