yo QrRLOrALDISRONLY J SUMMARY OF "EFFECT OF THE HYDROGEN BOMB EXPLOSION ON THE RICE AND VEGETABLES"# by Tom ji Egawa A. Vegetables 1, The artificial radioactivity of vegetables was measured after Sept. 10, Some of the vegetables show considerable emount of trace of artificial radioactivity. At the end of June, the half-life of the radioactivity was eS5timated to be of the order of 30 days. (mo measurement of half- life was done since then.) It is remarkable that some vegetables still show high counting rete in spite of the time interval of h mnths since the lest explosion. In general, it is the stem and leaf thet give high counts, Therefore, attention should be paid to those vegetables whose leaves ere used as food, 36 There is hardly any radioactivity in the fruits or seeds which ripened in recent time, It is difficult to determine whether these radicactive substances are Simply external or absorbed in the body. 7€ B, Wheat end Barley 1. 2. mo _ a Of the wheat and barley harvested in 1952 and 1953, no artificial redioectivity was observed except for 2 cases (10 in all). Tne reason for contamination of these 2 cases is unknown and is being reStudied, The result of study on wheat and berley harvested in 1954 is es follons: _ grain stem end leaf bran cases 16 Eighest Count Ly Lowest Count 3 Averece 6 13 33 9 23 8 38 18 28 where the unit is ct/min/10 er.