There has always been a demand for a practical work book on hematology among students of medicine, practitioners and laboratory technicians that would provide a ready reference source when examining blood films. A number of such books have appeared in recent years and have been well received. Many of those which have been published are now out of date or incomplete in their coverage of the practical aspects of current advances in the field of hematology. This volume was prepared by Doctor Kracke utilizing the plates from his large treatise, "Diseases of the Blood" and incorporating concise clinical descriptions of various disorders of hematopoiesis together with other desirable hematologic findings that makes this a practical, concise and current working manual.