8 CONCLUSIONS It is thus evident that meteorological theory is involved in predicting future fallout. Such forecasts are uncertain not only because of ignorance about future testing but also because we can only guess at where the fallout will be deposited. The model described in this paper is, after all, still being developed. However, although meteorological deficiencies might appear to be large, they are smaller than the biological uncertainties described in other papers of this symposium. REFERENCES 1. Lester Machta, Meteorological Factors Affecting Spread of Radioactivity from Nuclear Bombs, J. Wash. Acad, Sci. 47(6): 169-179 (June 1957). . W. W. Kellogg, in The Nature of Radioactive Fallout and Its Effect on Man, Washington: U. S. Government Printing Office, 1957. pp. 104-118 (Testimony before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, 1st Session, 1957.) . M. Eisenbud, in The Nature of Radioactive Fallout and Its Effect on Man. Washington: U. S. Government Printing Office, 1957. pp. 574 and 575 (Testimony before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, 1st Session, 1957.) . L. Machta, in The Nature of Radioactive Fallout and Its Effect on Man, Washington: U. S. Government Printing Office, 1957. pp. 141-161 (Testimony before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, 1st Session, 1957.) . Modified by data from unpublished USAEC Reports, New York Operations Office. . G. M. B. Dobson, Origin and Distribution of the Polyatomic Molecules in the Atmosphere, Proc. Roy. Soc. (London), A, 236(1205): 187-192 (1957). . H. K. Paetzold, New Experimental and Theoretical Investigations on Atmospheric Ozone Layer, J. Atmospheric and Terrest. Phys. 5: 128-140 (1955). . G. Ohring, The Radiation Budget of the Stratosphere, Scientific Report No. 1, Project No. 429, Contract No. AF19(604)-1739, New York University, June 1957. . N. G. Stewart et al., The World-Wide Deposition of Long-Lived Fission Products from Nuclear Test Explosions, Report AERE-MP/R-2354, October 1957. (This report is included in Part 4 as the second paper.) . W. F, Libby, in The Nature of Radioactive Fallout and Its Effect on Man. Washington: U. S. Government Printing Office, 1957. pp. 611-616 (Testimony before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, ist Session, 1957.) 10. New York Operations Office, AEC (unpublished). 11. Naval Research Laboratory (unpublished). L. B. Lockhart, in The Nature of Radioactive Fallout and Its Effect on Man, Washington: U. S. Government Printing Office, 1957. pp. 650-652 (Testimony before the Special Subcommittee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, Ist Session, 1957.) 12. E, A. Martell, in The Nature of Radioactive Fallout and Its Effect on Man, Washington: U. S. Government Printing Office, 1957. pp. 616-650 (Testimony before the Special Sub- committee on Radiation of the Joint Committee on Atomic Energy, 85th Congress, 1st Session, 1957.) 13. W.R. Collins, Jr., and N. A. Hallden, A Study of Fallout in Rainfall Collections from March through July 1956, USAEC Report NYO-4889, Apr. 30, 1957 (unclassified). 325