[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.