OG Gyn © Paul f. Foater,_.egis General Manager Jaiy 7, 1958 Ge L. Domham, 8.0., Girector, Division of Biolugy & Medicine PALLOUY aCOLOCT AT 2NIVETCE SYMECL: BMS:AUS BEST COPY AVAILABLE Is response to the semorandum 2f Jane 20 from dr. Libty to you abcut the same subject aa this memcrandup, the data on the calcium content ef the samples reported {a SWFL-53 will be obtained and forwarded tc Br. Libby at the eerliest time possible. This information will permit the calculation cf “strontium unite’ formerly called “sunshine units . The calctum data wes act included in UVFL-50 as the purpose cf the Yepert was to record the cbserved changes in radioactivity with tice in ona area with one especies of organism. Also, since the levels of calcium in creb tissues are reasonably constant, the importance of including the calcium data for these specific semples did aot seam great at the time cf writing the report although ti is now recognized thet these data will provide additional infcrmation. I have been infcorwed that Sr. Libby's request thet calcium data should eccompanxy all strontium data was received after UNFL-50 bad been completed but before the repert was published. Since or. Libby’s request, the University of #ashington Laboratory hes reporte. their date in terme cf strontium omits. teference is made to Tabies 26 and {7 in “Radicective Contamination of Cartain Areaa in the Pacific Gceas from Huclear Teats” (edited by Jr. Sunning); the table submitted om February 11, i955, “Comparisen of Sr-S0 Levels in wand Crabs Collected at fongelap Atoll in Jeiy, 19565 and July, L957°; the tabie submitted in May, 1953, “Strontiun-90 in fone Saeples fron Rats Collected at Rongelap Island, March, 1958°; the letter of Jone 5, 1958 which reports the strontinm anita of pig bone; and the letter of June 13, 1958 which includes a table om the “Se-$0 in the Skeletcns of Land Craba Coilected at Rongelap Atoll’. As these data have act been published, other than the two tahies in tha Dunning report, copies of the tables are attached, Attachment: Aa stated ebove ce: OGH OFFICE > SURNAME b> ’ DATE » |... Form AEC-3158 (Rev. 9-53) Dr. N. F. Libby —A._Taeo— BMES Aas Seymour:pas 7/7/58 U.S. GOVERNMENT “PRINTING @FRICE If

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