was five days. The influence of intermixing of fission products from different tests on the measurements is discussed. The Freidburg measuremerts showed that the products of the hydrogen bomb tests in the Marshall Islands reached West Garmany after a travel time of 10 to 20 days. In general the systematic use of the decay law did not yield discrete explosion times but only quite indistinct digtribution curves which indicate approxixam mately the true explosion dates. The effects 'of meteorological conditions of both the troposphere and the stratosphere on the transport, exchange, and deposition of fission products is discussed. (C.H.) ‘ Descriptors: ATMOSPHERE; DECAY; DISTRIBUTION; FALLOUT; FISSION PRODUCTS ; MEASURED VALUES; METEOROLOGY; NEVADA; NUCLEAR EXPLOSIONS; RADIOACTIVITY; RAIN; TRANSLATIONS; TRANSPORT; WATER Subject Codes (NSA): HEALTH AND SAFETY 10/5/226 095447 ON THE (Item 226 from file: NSA-13-002078 109) SEISMOLOGICAL ASPECTS OF THE 1954 HYDROGEN BOMB EXPLOSIONS Burke-Gaffney, T.N.; Bullen, K.E. Riverview Coll. Observatory, Australia; Univ. of Sydney Australian J. Phys. v2. Publication Date: (1958) Sept. 318-21 p. Journal Announcement: NSA13 Document Type: Journal Article Language: English Tentative conclusions previously drawn from an analysis of seismic readings of four 1954 hydrogen bomb explosions are re-examined in the light of source data subsequently released on these explosions. The released data show that earlier computed origin-times for the four explosions were correct within 0.0, 0.4, 0.7, and 0.1 sec, respectively. The re-examination shows that the J.B. P tables need a correction of -2.2 plus or minus 1.0 sec for surface epicenters in the mid Pacific and recordings at continental stations. It is confirmed that any difference between the P travel-times from Bikini to Australia and Bikini to the United States is not much more than 1/2 sec. Previous inferences on the velocities of air waves from the explosions remain undisturbed. The re-exaanination confirms the occurrence of diffracted PKP waves in front of the 142 caustic, and confirms that these diffracted waves arrive at times significantly earlier than PKIKP waves. (auth) Descriptors: AIR; EARTH; ERRORS; HYDROGEN; NUCLEAR EXPLOSIONS; OSCILLATIONS; SEISMOLOGY; SURFACES; THERMONUCLEAR REACTIONS; VELOCITY Subject Codes (NSA): CONTROLLED THERMONUCLEAR PROCESSES 10/5/227 094095 (Item 227 from file: NSA-13-000725 RADIOACTIVITY DURING 1954-55 OF 109) INVERTEBRATES AND OTHER ORGANISMS AT ENIWETOK ATOLL Bonham, K. ™ 9003531 Washington. Univ., Seattle. Applied Fisheries Lab. Publication Date: Jan. 6, 1958 55 p. Primary Report No.: UWFL-53 Journal Announcement: NSA13 Availability: NTIS Document Type: Report Language: English Contract No.: AT(45-1)-540 The trend in beta radioactivity as measured with methane flow counters over a period of about two years is shown, starting with the 1954 Castle series of nuclear detonations, up to but not including the series of 1956. The resuhts are presented as graphs each showing the logarithm of the radioactivity of an organism or of a particular tissue of an organism, related to the logarith of the time after the date of detonation, when nearly all of the radioactivity was assumed to have originated. Invertebrates are considered in greatest detail, and other organisms and materials plankton, are included for comparison: algae, land plants, island soil, reef fish, birds, beach sand, and rats. sea water, It is proposed