skin bone and muscle having successively lesser amourts. This relationship prevailed throughout the period. The rate of decline was greatest during the first 100 days, with a loss of 90% of the radioactivity during the period. Studies were made on the varlation of total radioactivity in the tissues and species, on comparisons of the amount of radioactivity in the species and in their food, smd on comparisons of the decline of j radioactivity during the period with the decay of radioactivity ih tissues collected soon after the shots. (auth) BONES; DECAY; ENVIRONMENT; FISH; FOOD; INTESTINE; LIVER; Descriptors: MEASURED VALUES; MUSCLES; NUCLEAR EXPLOSIONS; QUANTITY RATIO; RADIOACTIVITY ; SKIN; STOMACH Subject Codes (NSA): BIOLOGY AND MEDICINE 10/5/240 (Item 240 from file: 079008 NSA-12-003550 109) SALT CONCENTRATION IN THE AIR AT BIKINI ATOLL Evans, E.C. III (A PRELIMINARY STUDY) Naval Radiological Defense Lab., San Francisco Publication Date: May 15, 1957 52 p. Primary Report No.: USNRDL-TR-166 Secondary Report No.: Project NS-088-001 Note: Project NS-088-001 Journal Announcement: NSA12 Document Type: Report Language: English . This preliminary study conducted at the Bikini Atoll investigated the variation of salt concentration in the first 300 ft of atmosphere by collection on specially developed silver dichromate reagent films. For a 10-knot wind maximum concentration appeared to exist at 50 to 75 ft above Mean Low Water Springs, with the possibility of a second maximum somewhere ahove 300 ft. Preliminary sine-frequency counts showed a bimodal distribution of salt nuclei with maximum at 5 and 12 microns. (auth) Descriptors: AIR; ATMOSPHERE; CHEMICAL REACTIONS; CHROMIUM OXIDES; FILMS; GRAIN SIZE; QUANTITY RATIO; SALTS; SAMPLING; SILVER COMPOUNDS Subject Codes (NSA): CHEMISTRY 10/5/241 (Item 241 from file: 078170 NSA-12-002702 DETECTION OF MANGANESE-54 Shipman, W.H.; U.S. Simone, 109) IN RADIOACTIVE FALLOUT P.; Weiss, H.V. Naval Radiological Defense Lab., San Francisco, Calif. Science See Saiensu v 126. Publication Date: (1957) Nov. 8 971-2 p. Coden: SIENDS1 Journal Announcement: NSA12 Document Type: Journal Article Language: English The chemical separation and gamma spectral analysis of Mn are& described. The gamma spectra before and after separation are graphed. samples were collected during the 1956 Eniwetok nuclear tests. (M.H.R.) The Descriptors: FALLOUT; GAMMA SPECTROMETERS; MANGANESE 54; NUCLEAR EXPLOSIONS; QUALITATIVE ANALYSIS; SAMPLING; SEPARATION PROCESSES; TESTING Subject Codes (NSA): BIOLOGY AND MEDICINE 10/5/242 (Item 242 from file: 075545 NSA-12-000041 109) SURVEY OF RADIOACTIVITY IN THE SEA AND IN PELAGIC MARINE LIFE WEST OF THE MARSHALL ISLANDS, SEPTEMBER 1-20, 1956 Seymour, A.H.; Held, E.E.; Lowman, F.G.; Donaldson, J.R.; South, D.Jd. Washington. Univ., Seattle. Applied Fisheries Lab. Publication Date: Mar. 15, 1957 Primary Report No.: UWFL-47 Journal Announcement: NSA12 Availability: NTIS Document Type: Report Language: English 50036317 63 p.