1. Nagler, F. P. O., Med. J. Austral., 1, 281 (1942).
2. Nagler, F. P. O., Austral. J. Exp. Biol., 22, 29 (1944).
3. Burnet, F. M., and Boake, W. C., J. Immunol., in the press.
4. Burnet, F. M., and Stone, J. D., Austral. J. Exp. Biol., in the press.
5. Stone, J. D., Austral. J. Exp. Biol., in the press.