This book is based on a large experience in x-ray work in various institutions in Manchester. It is a record of personal work, and like all such statements from competent workers is interesting. As the authors intimate in their preface, the great difficulty with x-rays in medicine is that the work has a as often as not been in the hands either of radiographers who knew no medicine or of physicians who knew precious little of xrays, Bythell and Barcly are among the group-may their tribe increase—who know both, and they have furnished an excellent little book on diagnosis. The subject of x examinations in its various anatomic localities has been excellently covered. At the end of each chapter there is a large collection of skiagrams with explanations illustrating the conditions which has just been considered in the text, and this is per haps the best feature of the book.