628 VOLCHOK these seasonal fluctuations and that the fluctuations are broadly re- producible from year to year. Superimposed on these fluctuations are the individual yearly rainfall patterns, which to a degree control the buildup of air concentrations, as qualitatively outlined previously. REFERENCES 1, L. B. Lockhart, Jr., R. L. Patterson, Jr., A. W. Saunders, Jr., and R. W. Black, Summary Report on Fission Product Radioactivity in Air Along the 80th Meridian (West), 1957-1962, Report NRL-6104; U.S. Naval Research Laboratory, June 15, 1964, 2, E, P. Hardy,Jr., and J, Rivera, Fallout Program Quarterly Summary Report, USAEC Report HASL-149, Health and Safety Laboratory, Oct. 1, 1964. 3. Federal Radiation Council, Revised Fallout Estimates for 1964-1965 and Verification of the 1963 Predictions, October 1964. 4. E, P, Hardy, Jr., J. Rivera, and W. R. Collins, Jr., Fallout Program Quarterly Summary Report, USAEC Report HASL-146, Health and Safety Laboratory, June 1, 1964.

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