This compilation - the first of its kind - fills a real gap in the field of electrolyte data. Virtually all self-diffusion data in electrolyte solutions as reported in the literature have been examined and the book contains over 400 tables covering diffusion in binary and ternary aqueous solutions, in mixed solvents, and of non-electrolytes in various solvents. An important feature of the compilation is that all data have been critically examined and their accuracy assessed. Other features are an introductory chapter in which the methods of measurement are reviewed; appendices containing tables of the limiting self-diffusion coefficients of ions; and a list of references to data which have been omitted but where information about the diffusing system is given. This is the only complete compilation of self-diffusion data in electrolyte solutions. It will appeal to electrochemists in general, particularly now that recent developments in the theory of transport processes require these data. It will also have a special appeal to electroanalytical chemists in that the ionic self-diffusion coefficient is an important quantity for the interpretation of electrode reactions. In addition, the book will interest geochemists and environmental chemists because the migration of radioactive ions from nuclear waste in certain aqueous media will be governed by the tracer-diffusion coefficient.