105~ AECD -3446 tales from 140 foot depth averaged 181; one sample from 70 feet, 279; and one male from 15 feet, 86. This would suggest higher counts from the deep samples empared to the 15-foot sample, bur since the counts of samples taken at a my of 15 feet off Bikini Island ranged from 6 to 164 d/m/g, the differences should ibe considered significant with the limited data presented, If the water off the ¥Islands at Eniwetok can be considered as one mass, the samples from 49 feet : off Engebi and Aomon-Biijiri can be compared with samples from 15 feet Runit, Three samples from 49 feet off Engebi and Aomon-Biijiri Islands aver - ged 618 d/m/g and four samples from Runit at 15 feet averaged 304 d/m/g. The 1948 and the 1949 estimates of radioactivity in the plankton from comparrareas are given below. The 1948 values were expressed as millimicrocuries kilogram of wet tissue and have been converted to disintegrations per minute ‘gram of wet tissue by multiplying by 2. 2. Bikini Island Bikini Target Area AomonIsland Engebi Island 1948 1949 55 48 290 151 2858 1503 990 - 350 q During July~August, 1949, 46 plankton samples were collected from Bikini, dwetok and Likiep Atolls. Samples were collected by pumping from various 3 dations, radioactivity of plankton samples taken off Bikini Island was the same;~ a StBikini Target Area, three times greater; and off the Eniwetok Shot Islands, at times greater. he fine- meshed nets. As in 1948, the highest counts in 1949 were from catches in For comparable areas in which counts were greater than “Re control station, the d/m/g of plankton in 1949 was approximately one half the 8 value. TIPE O Leet TSQVER SITs UMS. G2 rary ee . ree oft 4