This book is designed to develop in the students (specially postgraduate) a sustained interest and enthusiasm to learn and develop the Concepts in Organon of Medicine in rational and stepwise manner. It incorporates a variety of Postgraduate matters, along with illustrations to help the students understand the subject quickly. The ultimate purpose of this book is to equip the reader with a comprehensive knowledge in Homoeopathy with reference to basic as well as applied aspects. This book is an instrument for the preparation of dissertation work as well as thesis work in Postgraduate study.