for most organisms studied that after a period varying with the organism up to two to four weeks folhowing detonation, a maximum level of radioactivity in the field samples collected is attained, followed by a decline approaching linearity on log-log plots with slope; over the major portion of the two-year period that can be represented as the negative exponent of the time after detonation. These decline slopes varied greatly with different localities and organisms, reaching a maximum of > 3. BW few decay rates of individual samples of each organism or material are included for comparison, and these generally were equal to, or less steep than, the declines, suggesting that for some organisms or tissues, the level ‘of radioactivity in the environment decreases more rapidly than can be accounted for solely by physical decay while for others the rate of decline can be accounted for solely by the rate of physical decay. Dilution by natural water currents and rain is presumed to account for the many cases of more rapid decline than decay. (See also UFFL-42.) Descriptors: ABSORPTION; ALGAE; ANIMALS; BETA PARTICLES; BIRDS; BODY; DECAY; DIAGRAMS; ENVIRONMENT; FISH; METHANE; NUCLEAR EXPLOSIONS; PLANTS; PROPORTIONAL COUNTERS; RADIOACTIVITY; RAIN; SAND; SOILS; TISSUES; WATER Subject Codes (NSA): HEALTH AND SAFETY 10/5/228 (Item 228 from file: 091494 NSA-12-016077 109) SEISMIC SURFACE WAVES AT PALISADES FROM EXPLOSIONS MARSHALL ISLANDS IN NEVADA AND THE Oliver, K.; Ewing, M. Columbia Univ., New York Proc. Natl. Acad. Sci. U.S. Publication Date: (1958) Aug. vi 44. 780-5 p. Journal Announcement: NSA12 Document Type: Journal Article Language: English Surface waves from large nuclear explosions in the Marshall Inlands were detected at Palisades, New York, at a distance of about 105 deg and presumably may be detected by long-period seismographs throughout the world. Surface waves from nuclear explosions in Nevada were detected at Palisades at a distance of about 33 deg and presumably could be detected throughout most of North America. No information is available on these waves for oceanic paths. Signals from both sites consist entirely of dispersed Rayleigh wave trains. The dispersive pattern may be explained by using dispersion curves developed in studies of earthquakegenerated surface waves. No Love or body waves were detected at Palisades. All the foregoing data are for sources on or above the earth’s surface. Rainier, the small underground nuclear explosion, was not detected at Palisades. (auth) Descriptors: DETECTION; GEOPHYSICS; MARSHALL ISLANDS; MEASURED VALUES; NEVADA TEST SITE; NUCLEAR EXPLOSIONS; OSCILLATIONS; PACIFIC OCEAN; RAYLEIGH SCATTERING; SCATTERING; SEISMOLOGY Subject Codes (NSA): GENERAL 10/5/229 (Item 229 from file: 090713 NSA-12-015295 109) THE POSSIBLE ATMOSPHERIC TRAJECTORIES OF RADIOACTIVE PRODUCTS FROM THE MARSHALL ISLANDS NUCLEAR EXPLOSIONS Drogaitsev, D.A. Priroda v No. 7. Publication Date: 1958 78-80 p. Journal Announcement: NSA12 Document Type: Journal Article Language: Russian Descriptors: ATMOSPHERE; DISTRIBUTION; FISSION PRODUCTS; EXPLOSIONS; RADIOACTIVITY Subject Codes (NSA): BIOLOGY AND MEDICINE 10/5/230 090609 (Item 230 from file: NSA-12-015191 109) RESEARCH ON POWER FROM FUSION AND OTHER ENERGY PROGRAMS 5.003 ba NUCLEAR ACTIVITIES IN THE ATOMIC