The tenth volume of the treatise on medical pathology and applied therapeutics of Sergent, Ribadeau-Dumas and Babonneix covers diseases of the blood and hematopoietic organs, spleen and bones. Following an introduction by Bezançon and Le Sourd, pointing out the value and importance of a study of hematology, the book is divided into three sections. Part 1, by Pagniez and Agasse-Lafont, deals with the diseases of the blood and hematopoeitic organs, and includes a section by Hazard on the physical and chemical examination of the blood. Part 2, by Agasse-Lafont, treats of diseases of the spleen. Part 3, by Sainton, has to do with diseases of the bones, and includes a chapter on rickets, by Apert. Each of the sections is written in a clear and concise manner, the subject matter being well selected and, in the main, adequate, although none of the discussions seem as comprehensive as would be expected