1. Schulz, F. N., Z. Physiol. Chem., 24, 449 (1898). Hill, R., and Holden H. F., Biochem. J., 20, 1326 (1926). Anson, M. L., and Mirsky, A. E., J. Gen. Physiol., 13, 469 (1930).
2. Wyman, J., “Advances in Protein Chemistry", 4, 454 (1948). Jope, E. M., in ”Hæmoglobin", papers presented at the Sir Joseph Barcroft Memorial Conference, Cambridge, 1948, p. 218 (London, 1949). Jope, E. M., quoted in Rimington, C., and Fulton, J. D., Biochem. J., 41, 619 (1947).
3. Gralén, N., Biochem. J., 33, 1907 (1939). It may be noted that free globins appear to have molecular weights of the order 34,000, half that of the red cell hæmoglobins.
4. Holiday, E. R., J. Sci. Instr., 14, 166 (1937); a more recent account is in the press.
5. Drabkin, D. L., J. Biol. Chem., 158, 721 (1945).