This thesis deals with the fine structure of the aromatic hydrocarbons and the heterocyclic compound indazole. The author's contributions are given in the attached reprints from the Journal of the Chemical Society, while the typescript gives an account of the theories involved as well as some work not yet published.Certain considerations outlined in the publications are expanded.Part I gives a general survey of the subject, and Part II deals more particularly with those topics related to the author's work
