P_{Roblems Of} Subnormality: By J. E. Wallace Wallin, (World Book Co., New York, 1917. Pp. 285.).

This volume is concerned with the problems of the feebleminded, the group between normal children on the one hand and imbeciles on the other. It is divided essentially into four parts dealing respectively with: the exact diagnosis of the presence and degree of feeble-mindedness, the differential modes of education needed for such children, the questions of after-care and the use to which the feeble-minded can be put, and the social and preventive problems concerned. In addition there are chapters on the general question of the changing attitude towards the feeble-minded, epilepsy, State provision for defective children, and the hygiene of eugenic generation.

The most valuable portions of the book would seem to be the first section, which gives an interestingly written historical review of the development of our knowledge on the subject, and the second one, dealing with the problems of psychological diagnosis. Wallin rightly insists that this diagnosis and exact grading can only be made by specially trained experts. "A few years ago the assumption was made that practically any intelligent person could