1. Norrish and Foord, Proc. Roy. Soc., A, 157, 503 (1936).
2. Axford and Norrish, Proc. Roy. Soc., A, 192, 518 (1948).
3. (a) Norrish, Com. to the Centre National de la Recherche Scientifique, Paris, 1948 (in course of publication). (b) Harding and Norrish, "Oxidation of Ethylene" (in course of publication).
4. Data from Bichowsky and Rossini, "Thermochemistry of Chemical Substances" (Reinhold Publishing Corporation, New York, 1936).
5. Bray, J. Amer. Chem. Soc., 60, 82 (1938).