1. Daniels, M., Scholes, G., Weiss, J., and Wheeler, C. M., Nature, 178, 157 (1956); J. Chem. Soc., 226 (1957).
2. Weiss, J., in “Organic Peroxides in Radiobiology”, 42 (edit. by Haissinsky, M.) (Masson, Paris, 1958). Cf. also Okada, S., ibid. 46.
3. Ekert, B., and Monier, R., Nature, 184, B.A.58 (1959).
4. Oakey, R. E., Ph.D. thesis, Durham (1958).
5. Fieser, L. F., Greene, Th. W., Bischoff, F., Lopoz, G., and Rupp, J. J., J. Amer. Chem. Soc., 77, 2928 (1955).