This book provides a record of the symposium held at McMaster University, Ontario, Canada, in honour of Professor J\S\Kirkaldy, and covers the recent progress being made in phase transformations, both experimental and theoretical, to facilitate the understanding of microstructural development. This volume includes new material on atomic modelling of phase transitions, descriptions of amorphous-crystalline transitions, new data on motion of interfaces, elastic energy effects and pattern forming systems, as well as contributions from related disciplines such as thermodynamics, kinetics and the mechanics of solids.