One is first struck by the significant fact that this volume is only about half the size of recent volumes in this series and lastly by the even more significant fact that it could have been materially improved by a much greater reduction. This review is not concerned with the manner in which the various authors have presented their material. On the whole they have done as well as any similar group might have been expected to do. True they have attempted, unconsciously perhaps, to screen an enormous void of ignorance with a much fenestrated though thick curtain of words.
There is only one serious omission in the volume. There is nothing more than a passing reference (e. g. pp. 261, 307, 312) to the animal experimental studies of the influence of frustration and emotional stress on the activities of the remainder of the body. With the exception of this