1. Dalldorf, G., & Zall, C., J. Exper. Med., New York, 1930, LII, 57.
2. Dalldorf, G., ibid., 1929, L, 293.
3. Fish, E. W., & Harris, L. J., Phil. Trans. Roy. Soc. Lond., London, 1934 (Ser. B.), CCXXIII, 489.
4. Goettsch, M., Quart J. Pharm. and Pharmacol, Lond., 1928, I, 168.
5. Diet and Dental Health,;Hanke, M.T.;Chicago,1933