In this monograph Haden discusses first the formation of blood, taking up the embryologic as well as the physiologic considerations in some detail. Succeeding chapters have to do with the leukocytes, the thrombocytes and the technic of examination of the blood. The next three chapters dwell on the mechanism of production of various abnormalities of the blood, the word "abnormalities" being used in its broader sense. The explanation of the mechanism of leukocytosis and leukopenia, for example, is most interesting and informative. Treatment of the hematic disorders then follows. This completes the formal presentation of the subject of hematology.
The remaining eleven chapters are particularly to be commended. In them, approximately one third of the book, is a series of case reports covering succinctly and clearly all the various types of anemia, such as polycythemias, leukocytoses and leukemias. This section makes interesting reading and explains clearly the rather dogmatic, didactic