1. Gye, W. E., and Purdy, W. J., Brit. J. Exp. Path., 3, 75 (1922).
2. Carman, H., Trans. Farad. Soc., 36, 964 (1940).
3. King, E. J., Stantial, H., and Dolan, M., Biochem. J., 27, 1002 (1933).
4. Gye, W. E., and Purdy, W. J., Brit. J. Exp. Path., 3, 86 (1922).
5. Banting, F. S., Can. Med. Assoc. J., 289 (1936).