1. For a review of these effects, see Allsopp, Trans. Farad. Soc., 40, 79 (1944).
2. Ref. 1, p. 84.
3. See, for example, Weiss, Nature, 153, 748 (1944); Lea, "Actions of Radiations on Living Cells" (Cambridge, 1946); Burton, M., address to spring meeting of the American Chemical Society at Atlanta City (1946), to be published.
4. Baxendale, Evans and Park, Trans. Farad. Soc., 42, 155 (1946).
5. Dainton, to be published.