Here is an outstanding book—a landmark; its like may never appear again. That this book is much needed today is indicated by one fact—recently I read a booklet on mental retardation in which, in the paragraph on causes, no mention was made of heredity. There were the several usual statements expressing great desire for research, but perhaps not for research into the heredity of the syndrome.
The Reeds, of the great Dight Institute at the University of Minnesota, had a wonderful opportunity and grasped it; the result is this splendid book. In 1910 the superintendent of the State School at Faribault, Minnesota—the late Dr. A. C. Rogers-talked the State Legislature into appropriating $25,000 for a family study of feeblemindedness. He began with a study of the mental status of all discoverable relatives of 289 persons then resident in the school. During the next seven years or more much was learned