[148] Pulmonary Tuberculosis, p. 550. Philadelphia, 1908.
[149] A Text-book of Obstetrics, p. 427. Philadelphia, 1912.
[150] The Principles and Practice of Obstetrics, p. 480. Philadelphia, 1913.
[151] Pennsylvania Medical Journal, February, 1916.
[152] From Abraham Colles, Dublin, 1837.
[153] Wolff, 1879.
[154] Nederlandisch Tijdschrift voor Geneeskunde, i, 9.
[155] Zeitschr. f. klinisch. Med., vol. lxxvi. Berlin.
[156] Boston Med. and Surg. Jour., vol. clvii, n. 4.
[157] Jour. Amer. Med. Assoc., October 31, 1914.