1. Szent-Györgyi, A., Harvey Lectures, 34, 265 (1939).
2. Szent-Györgyi, A., “Studies on Biological Oxidation and Some of Its Catalystsâ (Budapest-Leipzig, 1937).
3. Keilin, D., and Hartree, E. F., Proc. Hoy. Soc., B, 125, 171 (1938).
4. Stern, K. G., Horwitt, M. K., Melnick, J. L., and Scheff, G., unpublished expts.
5. cf. Lehmann, J., and MÃrtensson, Skand. Arch, Physiol., 75, 61 (1936).