First published in 1929, this book is a continuation of Arthur Newsholme’s Evolution of Preventive Medicine, published in 1927, which was concerned with the possibilities in progress of prevention of disease, up to the middle of the nineteenth century. The current volume focuses on the modern period and looks at the work of Louis Pasteur in particular. It provides a complete overview of the subject of preventive medicine at the time, and should be used as the basis for more detailed study. The book will be useful to those in medical circles, as well as historians interested in medicine.