First description of the obliquely contracted pelvis, or “Naegele pelvis”. Because of its rarity and the difficulty of recognizing it clinically in living subjects, the obliquely contracted pelvis, with its most often fatal consequences at delivery, was unknown until Naegele’s study of 37 cases. He suggested diagnostic aids for its recognition. English translation, Manchester, 1848. Finely printed centennial English translation by Pynson Printers, 1939.