280 R. A. Conard whoseefforts contributed to the successful completion of the survey. Particular gratitude is expressed to Dr. C. L. Dunham and his staff of the Division of Biology and Medicine of the Atomic Energy Commission, Dr. L. E. Farr and many others at the Brookhaven National Laboratory, the Department of the Navy and Trust Territory officials for their enthusiastic support. REFERENCES ALEXANDER, P., 1957, Gerontologia, 1, 174. BENNETT, L. R., CuasTain, S. M., Fuint, J. S., HANSEN, R. A., and Lewss, A. E., 1953, Radiology, 61, 411. Buiair, H. A., 1956, Proc. Internat. Conf. on the Peaceful Uses of Atomic Energy, 11, 118. (New York: United Nations.) : Briar, H. A., 1952, University of Rochester A.E.C. Report, UR~206. Bonn, V. P., Conarp, R. A., ROBERTSON, J. S., and WEDEN, E. A., 1955, April, WT-937, Operation Castle Addendum Report 4.1A Brues, A. M., and Sacuer, G. A., 1952, Symposium on Radiobiology, chap. 23, ed. J. J. Nickson, (New York: John Wiley and Sons), p. 441. Cassarett, G. W., 1956, Abstr. ¥. Geront., 11, 436. Cocan, D. G., Martin, S. F., and Kimura,S. J., 1949, Science, 110, 654. Comrort, A., 1959, Radiat. Res. Suppl., 1, 216. Conarp, R. A., Huceins, C. E., Cannon, B., Lowrey, A., and Ricuarps, J. B., 1957, FA.M.A., 164, 1192. Conarp, R. A., Meyer, L. M., Ratt, J. E., Lowrey, A., Bacu, S. A., CANNON, B., CARTER, E., Ercuer, M., and Hecuter, H., 1958, June, BNL 501 (T119). Conarp, R. A., RoBertson, J. S., Meyer, L. M., Surow, W. W., Wouins, W., Lowrey, A., UrRscueE., H. C., Jr., Barton, J. M., Gotpman, M., Hecuter, H., Ercuer, M., Carver, R. K., and Pottrr, D. W., 1959, May BNL 534 (T-135). Cronxite, E. P., Bonn, V. P., and Dunnam, C. L., 1956, Some Effects of Iontzing Radiation on Human Beings. (Washington, D.C.: U.S. Government Printing Office), TID 5358. CRONKITE, E. P., Dunuam,C. L., Grirrin, D., McPuHErson, S. D., and Woopwarp, K.T., 1955, Aug. BNL 384 (T-71). Court-Brown, W. M., and Dott, R., 1957, Med. Research Council, Special Report Series No. 295 (London: H.M.S.O.). Dus.in, L. I., and SpreGELMAN, M., 1948, ¥. Amer. med. Assoc., 137, 1519. GREULICH, W. W., Crismon, C. S., and TuRNgrR, M. L., 1953, 7. Pediat., 43, 121. Marcu., H. C., 1947, ¥. Amer. med. Assoc., 135, 179. Merriam, G. R., Jr., and Focut, E. F., 1957, Amer. 7. Roentgenol., 77, 759. Matoney, W. C., and Kastenpaum, M. A., 1955, Science, 121, 308. NEEL, J. V., and ScHuLL, W.J., 1956, The Effect of Exposure to the Atom Bomb on Pregnancy Termination in Hiroshima and Nagasaki. Nat. Ac. Sciences, Nat. Research Council Publication No. 461. REYNOLDS, E. L., 1952, NYO-4459. Simpson, C. L., and HEMPELMANN, L. H., 1957, Cancer, 10, 42. SINSKEY, R. M., 1955, Amer. ¥. Ophthal., 39, 285. STEWwarT, A., WEBB, J., Gites, D., and Hewitt, D., 1956, Lancet, 2, 447. Uuricu, H., 1946, New Engl. ¥. Med., 234, 45. WARREN, SHIELDS, 1956, 7. Amer. med. Assc., 162, 465. Boeri: DIscussION You said, in the beginning of your report, that, among the acute effects, losses of weight were generally observed, in spite of good appetite. You added that the affected individuals had ingested some contaminated material. Your