The preface of this book states that the object of the work is the study of the development of the accessory sinuses from their first appearance until after the beginning of puberty. Sections were cut in the three principal planes of the body and the accurate measurements of the air spaces are given. The book is illustrated with 102 plates, eighty-six of which represent the sections, and the remainder radiograms of the accessory sinuses. Explanations of the plates are written in German, French and English. The book will serve to direct closer attention to the accessory cavities in children and will undoubtedly prove a great stimulus in directing further work along this line.