60. Russell, a. L. SHORTENING OF LIFE IN THE OFFSPRING OF MALE MICE EXPOSED TO NEUTRON RADIATION FROM AN ATOMIC BOMB. Ne tional Ac adeuyofSciences.Proceedings 43, 324-329 61. Romney (1957 E. Me3 ae J. W.3; Nishita, ang. arson, and coil ” PROM SOILS. Saal, Herbert WHAT IS gris STRONTIUM 90 BUSINESS? Review 18, 30, 32 and 34 (1956). 63. LES. Qlafgon, J,_B.;3 ¥9e Ruloe’ Soll Science 83, 369- 376 (1957). 62. H.3; SLANT UPTAKE OF $490, AmericanMilk Saiki, Masanichi ON THE RADIOELEMENTS OF FISHES CONTAMINATED BY THE (1957). Sandor, Szalay and Denes, Berenyi OBSERVATIONS OF UNUSUAL RADIOACTIVITY IN PRECIPITA= TIONS WHICH FELL IN BEBRECEN BETWEEN APRIL 22 - DECEMBER 31, 1952. Budapest.liesyar-—Iodomanyos Akademia. 13p. (1955 In Hungarian). It is suggested that radioactive fallout may be use- ful for the neteorological study of the movenent of air masses, if an international organization records fission fragment concentration after atonic test explosions. 65. Schumunn ’ G. ARTIFICIALLY RADIOACTIVE PRODUCTS 5 THE ATOMSPHERE. Zeitschrift fur Angewandte rhysik 8, 361-4 (1956). Tre by-product activity arising from atom bcnb test was investigated in Heidelberg by a filtration method during hurct., 1953. The measureternt of the activity on the filter was accomplished by a cylin- drical fFecounter. The decay was proportional to t"(1 + x), w.ere x°is of the order of magnitude of O.1, und thus approaches t7l. The tinue of explosion Can be deternined by extrapolation of the reciprocal activity as a function of time, -l6<