The literature on mental deficiency is so vast that one finds himself in a maze when he tries to construct a comprehensive picture of all the many phases of this unfortunate condition. There are, to be sure, other monographs on mental deficiency, but in the eyes of the reviewer none as all embracing as this. For one finds that few details were omitted from this volume. The contents are divided into two main parts.
In part I, the first chapter deals with historical phases of mental deficiency. There are also chapters on the normal physical and mental development of the child, with a discussion on precocity and genius. The chapters on causes of mental deficiency, psychic symptoms, anatomic stigmas, pathologic changes observed at postmortem examination, diagnosis and prognosis, prevention and educational therapy are admirable.
In part II are discussed the clinical phases, viz., the endogenous and exogenous disturbances manifested in