To conserve space, daily fallout maps for the month of June are not shown. Rather, a map showing the average daily fallout for the month is given, together with the number of days for which data was available at each station. Again, the extrapolation is based on Nectar, and activity is show at 100 days after burst. It is also likely that the major portion of the fallout in June originated from Yankee and al] valuss should be increased by about 25% to give values at 100 days after Yankee. Although the discussion of the transport of debris in the atmosphere has been confined to essentially horizontal trajectories, the actual paths of individual radioactive particles are complex, wary Pal Fa three-dimensionsal phenomena, influenced by the fall velocities of the particles, atmospheric turbulence, rain scavenging and orographic effects. = 18 -