This edition, appearing eight years after the first, is based on a larger experience in the subject than any one person has ever before accumulated. The total number of diabetic necropsies is 484. Nine were on children under 11 years of age, twenty-nine were on older children and adolescents, and eight were in cases of hemochromatosis. In addition, because, as Dr. Joslin says in the foreword, the present case of diabetes is half surgical, Dr. Warren has had the opportunity to study nearly as many biopsies as necropsies. "I am thankful," Dr. Joslin adds, "for the training which Dr. Warren received as editor of the volume of Preventive Medicine issued by the Harvard Medical School, because automatically a note of prevention of diabetes and its complications permeates the text." The motto on the wall of Dr. Warren's "modern operating room" betokens this—Mortui vivos docent.
The years that have passed since