Dr. Osler, in his monograph, merely reiterates and summarizes work he has done in studying the height, weight, urinary excretion, and compartmental body water in babies of diabetic mothers. In the monograph, he presents the data in a fashion that makes it impossible to analyze and has added nothing new except that the diabetic baby is the proper length for its weight. In addition, he has made a sketchy, uncritical review of the literature pertaining to these babies and presents the data, again, in a summary fashion.