te ABSTR = Af - mptrical equations are developed from correlations of fallout data for estimating the composition of fallout fram detonations on land or at sea as a function of weapon yield and type, height of burst, and other parameters. The compositions are given in texts of the two contour-ratios defined in Part I of this study,* namely, the mass con- tour ratio and the fraction-of-device contour ratio. The effect of weapon yield, dowmvind distance from ground zero, induced activities, fraction of fission yield, height of burst, fractionation, terrain features, instrument response, extraneous debris, and meteorology on the values of the two contour ratios is discussed. ADMINISTRATIVE INFORMATION This work was done for the Bureau of Ships, unfer REIDSE Project Number S-FOl]1 05 12. It is part of the investigation desigated Progrem B-l, Problem 5, which is described in this Laboratory's USNRDL Technical Program For Fiscal Years 1960 end 1961, Revision #1, Iduly 1959. pon/Nv “C.F. Miller, Theory of Decontamination, Part I. U. S. Naval Radiological Defense Laboratory Report USNRDL-460, 15 July 1958.