4386 On adding sodium sulfate to the ternary phase the central component of the triplet grows in intensity with respect to the outer transitions, as indicated in the Fig- ure 1 legend. The central component still remains 40z of the intensity of an equivalent aqueous solution of sodium ion, and this indicates the formation of a two- phase system with both phases containing partially ordered sodium ions. The two phases are not im- mediately apparent, but on standing for ...