represciatetives as a concluding phase of Operztions Crossroads tests at Bikini Atoll. In 1947 collections were made in Bikini Atoll and in the oceanic area in the direction of the Able test fallout.’ About six thousand samples were collected (Hines, 1962, p. 65). | A smaller survey by the Applied Fisheries Laboratory studied both Bikini and Eniwetok ‘ Atolls in 1948 (Hines, 1962, p. 24), with the July 1948 survey following the April and May tests of Operation Sandstone. invertebrates, and plankton were taken. Samples of fish, algae, In general, the Eniwetok results of 1948 were that low-level aquatic radiation was present generally as expected across the Atoll. The Applied Fisheries Laboratory survey: of 1949 included samplings at the uncontaminated "control" Atoll of Likiep. The Eniwetok survey in August also made observations of plants on shore. Prior to the thermonuclear test Mike on Eniwetok Atoll on 31 October 1952, the Applied Fisheries Laboratory made preliminary collections at Eniwetok (Hines, 1962, p. 137), usually on the lagoon side. Between 3 and 8 November after this large test, samples were taken from southern islands progressively to the northern islands. Island were collected. Also, rat traps at Rojoa On Engebi on 8 November, the radiation was 2 to 2.5 R/hr, no living animals were seen, and only stumps of vegetation remained. Plankton had a radioactivity of 140,000 disintegrations per minute and per gram (d/min:g) and algae had as high as 5 million d/min-g at that time. Fish in the vicinity of Engebi had a factor of 400 increase in activity after the test with 340,000 d/min-g. ~~ 18 *