183 R. F. PALUMBO tion existierte. Zwei Pflanzen, Guettarda und Portulaca, die nach 10 Monaten noch ungesund waren, hatten sich nach 16 Monaten gebessert. Photographien einiger der erholten Pflanzen sind diesem Bericht beigefigt, sowie eine Besprechung der Mittel, ausser den Strahlungen, von denen ahnlicher Schaden wir der an den Pflanzen der Korallenattolle des Pazifik berichtet worden ist. INTRODUCTION Since the summer of 1946, the Laboratory of Radiation Biology of the University of Washing- ton has conducted studies at the Eniwetok Proving Groundto evaluate the distribution of radioactivity in aquatic and terrestrial organisms of the atolls of the western Pacific and adjacent areas. These studies were made either shortly after a nuclear device had been detonated or after intervening periods varying from several to many months. Theresults of the investigations conducted in 1946,1947, 1948, 1949,and 1952) indicated the need for a study of the reinvasion or regrowth of organisms in an area contaminated by radiation. A study of this nature was undertaken following the detonation of an atomic device (Nectar) at Eniwetok Atoll in the spring of 1954. Facilities were made available at the Eniwetok Marine Biological Laboratory on Elmer (Parry) Teiterripuccn (Gene} Nector_ site Bogon (Irene) Sanildefonso (Edna) Ruchi (Clara) — Bogombogo (Belle) Bogallua (Alice) Engebi (Janet) Sy (Olive) Aoraanbiru (Vera) Runit ( Yvonne) Aniyaoni (Bruce) De Rist (Leroy) g N * < y Japtan (David) —____ 2 & Parry (E!mer)—_ o NAUTICAL MILES ' 23 4 Mut 2 (Henry) 6 Fic. |. Eniwetok Atoll.

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