@ ® During November 1955, HASL received 12 soil, 12 seawater, 8 vegetation, 1 plankton, 2 algae, 6 fish, and 15 coconut samples collected by A. Seymour of the Applied Fisheries Laboratory, University of Washington. This particular set of samples was collec- ted during October 21-23, 1955 on Rongelap, Kabelle, and Labaredj Islands of Rongelap Atoll and Mogiri Island of Alinginae Atoll. Each sample was analyzed at HASL for total activity and Sr-90. Selected samples were analyzed for normal calcium by the oxalate-permanganate titration method, for reporting values in Sun- shine Units. Values are reported as of February 27, 1956 and are pre- sented in three sections: L. <A summary of HASL results including a comparison with data obtained from University of Washington Report No. UWFL-l3. 2. A complete tabulation of HASL data with pertinent information given for each sample. 3. Notes covering sources of information, analytical procedures, and standardization and counting tech- niques used at HASL in processing these samples.