-10- AECD-3146 _ CAIN | STITVUSTT TISYA JO ANs of four ssue TiUa S;aou ALIS specimens of exulans collected at Biijiri and Engebi Islands exhibited wide variation in activity in different tissues and in different specimens. The highest count was found in bone (1780) and was directly correlated with the background count of the habitat. The total body activity of the four specimens varied from 1 to 120, The amount of radioactive fission products absorbed by the roots, translocated through the plant and deposited internally within the tissues of the coconut palms at Bikini and Eniwetok was not greater than twice that of control plants. High counting "fallout" material persisted externally on the ° dead leaf bases of coconuts, A cat8 created by neutron bombardment of ca*4 in the coral sands of Runit Island was a component of the tutal calcium of of the plants on that Island and resumably of the plants on Engebi and Aomon, Tt Calcium deficiency in Portulaca oleracea observed at 30 yards from the ha bomb site on Runit was consideredto be sufficient to have caused tissue disintegration and death. The tumorous growths observed on Ipomces*™ of ] Tuba on Engebi resembled those produced by an excess of indcle-3-acetic acid on a geranium plant. The activity of the tumors was very low. Fis of ti About one-third of the total number of plant species reported to be at B on the Eniwetok Shot Islands in 1944 or 1946 are not extinct. In 1949, 20 an a species were found on Engebi, 12 on Aomon and 19 on Runit. Of these, Sum: about one-fourth -- a total of 9 species -- were mutants. reappear The first plants to ports in the area where it is certain that the bomb destroyed all grow- ing plants, i.e., out to 300 yards from the bombsite, were Portulaca oleracea and Chloris inflata. _ exten. wetok tions : August *This r with the Navy.