I. An attempt to synthesisc 5-acetaminoterephthalic sulphinide. II. The synthesis of some homologues of the terpenes, derivatives of 1, 4-diisopropylcyclohexane. III. The refractivities and magnetic rotations of certain 1, 4-diisopropenylbenzenes; and the relation of these properties to the problem of the constitution of benzene ..