included in this study also are shown in Figure 1; the code names of the islands are in parentheses. In 1956 another series of nuclear tests Redwing) was conducted at Eniwetok Atoll. (Operation During this series, plant samples were collected from various islands of the atoll as well as in July 1957, one year later. The gross beta radio- activity of these samples is presented in the Appendix Table B. The results of gamma spectrum analyses for specific radioisotopes present in some of the samples collected in 1956 were re-~ ported in 1957 by Lowman, Palumbo and South 19) | METHODS The beach magnolia (Scaevola sp.") was chosen as the principle plant for study because of its widespread occu-rence in the central Pacific Islands; studied. 3ix other species also were In order to establish the levels of radioactive con- tamination from previous tests, gamples of plant tissues were collected before the detonation. labelled, The plants were staked, measured and photographed. After the detona-ion, observations and meaSurements were made of the plants and photographs were taken, Samples to be used for the deternin-~ ation of radioactivity were taken *Probably Scaevola sericea vahl!??, at approximately monthly