1. Pedersen, K. O., in "The Svedberg 1884 30/8 1944" (Uppsala: Almqvist and Wiksell, 1944), 490.
2. Kuttner, A., and Ratner, B., Amer. J. Dis. Child., 25, 413 (1922).
3. Svedberg, The, and Andersson, K. I. J., private communication.
4. Cf. Tiselius, "The Harvey Lectures" XXXV, 1939–1940, 67.
5. Wyman, J., Rafferty, J. A., and Ingalls, E., J. Biol Chem., 153, 275 (1944).