1. Bodine, J. M., American Practitioner and News 23: 481 (1897).
2. James, W., Talks to Teachers: 7 (1899).
3. Wiener Klinische Wochenschrift 1900 3
4. Welch, W. H., New Englander and Yale Review 49: 145 (1888).
5. Address of the President Before the American Society of Naturalists