~23~ gyaluationof the Chemicalanalyses‘of ‘theBicldgicalSauples +t i Fission product and.calciun analyseswere made of three soil t gamples, strontium analyses of selected foods, and pst analyses of plants, Additional samples collected December 8 were sent to Dr, Walter Claus, Division 6f Blology and Medicine, for chemical analyses,”ces | Samples were,taken ‘fron thee topinen of soll on March 26, j (1954, from bothLabaredj and Kabelle. Fortions were ashed and then dissolved ipdilutenitric acid, There wag only a very emali amount of ingelubleresidue containingless than o. pereent of the radioactivity of the solute, Aliquots of this solution were "used to determingtotal activityand temone samples for | chemkheal separation, | — SE} ee Standard methods of separating e1saton products and. ealoLum | wore followed. Countsobtainedfromtheanalyses for cerium, '. Sireondtun, niobium," atrontivny: watheniua,: end barium were cor~ reated for, chemical. or. spikeyield.The eheatcal yield ts the ratio of ‘theweight of recovered carrier to adéed carrier, A yield for. caloiun was not determined deeause of the large amount of ealeium carbonate in the sample. “the radioactivity of seven fission products and calelua corrected for yleld and adjusted te 100 percent recovery and expressed as a percentage of the total radiosetivity is given in Table VI. The chemical yields and the observed counts from which these values were computed are tabulated in Appendix Table XI, | The resulte of radioatrontiwa analyaes of biological samples from Rongelap Atoll are| Biven in Table vit, PNT ea near a eanMS ap BOY Re MetcoPRES LerhintEhEA N NBER , Rediostrontiun was