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This monograph might well serve as a model of what a modern heredobiologic study in psychiatry should be. It is gratifying to see that Lundborg's famous institute is continuing its important researches in this field. The need for such expert investigation of problems of heredity is the more pressing today since Rüdin's division of the German Research Institute for Psychiatry has forsaken science to indulge in pseudoscientific "race propaganda" (T. Lang: Nationalsozialistische Monatshefte24:119, 1932. Luxenburger, H.: Angewandte Erblichkeitslehre, Sozialbiologie und Rasse, Fortschr. d. Neurol., Psychiat. 5:392, 1933).
This study covers an investigation of forty families. Fifty-two cases of feeblemindedness occurred in thirty-four of the families. The feeblemindedness was congenital and stationary. It was usually noticed first in the second or third year of life. The mentality of the persons affected did not progress beyond an age level of between 3 and 6 years. The subjects had not