1. Goldblatt, H., Lynch, J., Hanzal, R. F., and Summerville, W. W., J. Exp. Med., 59, 347, (1034).
2. Houssay, B. A., and Fasciolo, J. C., Bol. Acad. Nac. Med. Buenos Aires 34 (Sept. 1937); Rev. Soc. Argent. Biol., 13, 284, (1037); C.R. Soc. Biol, 127, 147, (1938). Braun-Menéndez, E., and Fasciolo, J. C., Rev. Soc. Argent. Biol., 15, No. 4, 161 (1939).
3. Tigerstedt, R., and Bergman, P. G., Skand. Arch. Phys., 8, 223, (1898). Hessel, G., Klin. Woch., 17, 843, (1938). Helmer, O. M., and Page, I. H., J. Biol. Chem., 127, 757, (1939). Pickering, G. W., and Prinzmetal, M., Clin. Sci., 3, 211, (1938).