Many criticisms have been heard on the use of the term _Shell-shock_ as applied to some of the most important psychiatric and neurological problems of the recent war; but that the designation has meaning will be evident if Dr. Southard’s book is not simply skimmed over by the reader, but is studied in its entirety. The symptoms of a very large number, if not the majority, of the cases recorded, had for their initiating influence the psychic and physical horrors of life among exploding shells. As the author and those from whom he has received his clinical supply not infrequently point out, in many cases it would appear that purely psychic influences have played the chief rôle, but in others physical injuries have not been lacking. Much more than this is true: in many instances the soil was prepared by previous defect, disease, or injury, or to use one of Dr. Southard’s favorite expressions, “weak spots” were present before martial causes became operative. While the contributions to the medical and surgical history of the war have been somewhat numerous in current medical journals and in monographs, few comprehensive volumes have appeared. The reasons for this are not far to seek. The conflict has been of such magnitude, and the demands on the bodily and mental activity of the medical profession have been so intense and continuous, that time and opportunity for the careful and complete recording of experiences have not been often available; but works are beginning to appear in the languages of all the belligerent countries and these will increase in number and value during the next lustrum and decade, although it may be that some of the most important contributions will come after a decade or more is past. The great work before me is one that will leave its lasting impress, not only upon military but on civil medicine, for the lessons to be drawn from its pages are in large part as applicable to the one as to the other.