RAIN FROM SOUTH AND SNOW FROM KORTE by Yasuo Miyake As a result of the explosion of the hydrogen borb at Bikini, many places in Japan had rain contaminated with artificial radioactivities since May ly. It continued until September and material like drink water, vegetable, tea and milk had been contaminated to the fear of people. Though the rain in Jepan was expected not to cerry the redioactivity any more beyond the riddle of September Lecause of the change in the distribution of atmospheric pressure, districts of Tohoku and Hokuriku began to have the radioactive rain this time made in Russia. Thus Japan is now exposed to the ash of death from the both sides, In the above, we have classified the radioactive rains simply into that coming from Bikini and from Russia, We shall explein in the following on what scientific basis this jJudgnent is made. Detects f Atomic Explosi etection o omic Explosion: * p Dopartment of Energy Histerian’s Oftice mau LACHIVES It is one of tne secrets of a country how it detects the atomic explcsion occurred in other countries. But one may be able to point out various pcessible ways of detection as follows: (1.) Anccalous cscilletion of atmospheric pressure (2) fnomalous vibration of the surface of the ocean (tidal wave in small scale) (3) Weve of earthquake (4) Redicactivity in the atmosphere (5) Fedioactive rein (6) Ayvraly of the atmospheric electricity. Sone of these rhenorena have in fact re en observed in Jepan as a consequence of the experiments in the Eikini area Since last March, h e anonglous oscilletion of atmespheric pressure. Mr. FH, € ment of Meteorology of Kyowo University noticec that Yaesnamote of tre Deparinen whe sensitive carometer at Shic-no-zisaki recorded an ancrelous cScilletion several tines since March ] em interzreted it as € Phenomenon cue to the experiment-of the hydrogen bond. Afierwerds, the records cf berometers fren S verious districts of Japan were pur together, iog =T, f zwnrich the curves of Fig. 1 were obtained showing the variation of the inti imes frem plece to plece when the enorelous oscillation of atmesphere occur ec. Fron these curves, it wave is 2€5 m/sec, on is found thet the velocity of the anecsious pre the average, arnich is somewhat slower then the v tty of sound. Ceiculaiing from this value, the cates of the experinents are