-5~ intervals starting on May 22, 1955. 1954 and continuing to March The locations of these plants on the island, was divided arbitrarily into areas A, B, C and D, which are shown in Figure 2. At each collection period at Belle Island, samples of the top two Scaevola plant No. 1319 inches of soil near were combined and an six sub- the base of aliquot of the combined sample was taken for the measurement of gross beta radioactivity. Gamma survey-meter readings also were taken to determine the gamma dose to which the plants were subjected. After the plant samples were collected they were put on ice and Laboratory taken to where they the Eniwetok were Marine dissected, Biological weighed, dried, and packaged and later sent to the Laboratory of Radiation Biology in Seattle, Washington, outlined in uwFL-33 '4) muffle furnace at for geometry, and decay. The samples 540°C and flow counting chamber. for further were processing as dry-ashed in a counted in an internal gas- Corrections were made in the counts backscatter, coincidence, All counts for the 1954-1955 self-absorption and April 1956 samples were corrected to the date of collection, the decay factors being based on a soil sample collected May 1£, at Belle Island. 1954 For the early collections decay factors as