1. Shorland, F. B., Nature, 153, 168 (1944).
2. Shorland, F. B., J. Sci. Food Agric., 4, 497 (1953).
3. Smith, J. A. B., and Chibnall, A. C., Biochem. J., 26, 1345 (1932).
4. Weenink, R. O., N.Z. J. Sci., 2, 273 (1959).
5. James, A. T., personal communication; cf. Farquhar, J. W., Insull, W., Rosen, P., Stoffel, W., and Ahrens, E. H., in Supplement to Nutrit. Rev., 17 (August 1959).