25. FEWER TORNADOES IN AREAS OF THE ATOMIC CLOUDS. Us.3, World Report. 106 and 108 (April 29, 19553. Sarrigue, Hubert RADIOACTIVITY OF AIR AND FRECIPITATIONS. Bendus 243, 50%-§ (1956) (In French). Comptes Since May 31, 1956, all the precipitations at the summit of the Puy-de-Dome, have been contaminated with artificial radioactive products. The flight survey of June 15 confirms these results. 27. Honda, M. A PROPOSED METHOD OF ANALYSIS OF RADIOACTIVE fio IN RAIN WATER. JapanAnalyst 3, 368 19 . Ion exchange, using Amberlite IR-120 and Dowex 50 cation exchange resins, is proposed as a method of . analysis of radioactive substances in rain water. 28. Hunter, C. G. RADIATION INJURIES IN ATOMIC WAREFARE WITH STRESS ON FALLOUT. 76, 39-401 (1957). 29. Jacobs, Paul CLOUDS FROM NEVADA; A SPECIAL REPORT ON THE AEC'S NG PROGRAM. TheReporter 16, 10-29 19 ° 30. Kellogg, W. W.3; Rapp, R. R.3 and Greenfield, S. M. CLOSE-IN FALLOUT. Meteorology 14, 1-8 (1957). The phenomenon of radioactive fallout from an atomic explosion is described, and a quantitative technique ~ for determining the distribution of radioactive material on the ground is developed. The primary factors which must be considered are wind field, yield and height.of burst, and particle-size distribution. Certain parameters which enter directly into a fallout determination are given quantitatively, such as the altitude and size of the atomic cloud (as a function of explosion yield and atmospheric Stability) and particle fall-rates (as a function of altitude and particle size). Two hypothetical fallout patterns for a one-megation explosion, come puted on a high-speed digital computer are presented, -3 (continued)