1. See review of the literature by Findlay, G. M., "Recent Advances in Chemotherapy" (J. and A. Churchill, 2nd edition, 1939).
2. Yorke, W., Adams, A. R. D., and Murgatroyd, F., Ann. Trop. Med. Parasitol., 23, 501 (1929); 24, 115 (1930).
3. Beilinsohn, A., Zhurnal Exp. Biol. Med., 11, 52 (1929); cited from Chem. Abstr., 24, 1427 (1930).
4. Quastel, J. H., Biochem. J., 25, 1121 (1931).
5. Fürth, O., Scholl, R., and Herrmann, H., Wien. klin. Woch., 45, 1012 (1932).