pecreasee ed The contamination of grains of wheat and barley may have some significance Since these are main foods of the Jpanese. For instance, if one eats 300 gr. of wheat every day which is contaminated by 1) ct/min/lOgr. the radioactivity amunts to Li20 counts which may not be an insignificant figure in view of the controversial safety limit of radiation hazard, Rice 1. Bice of 1952 seems to be free from artificial radioactivity (one example 2. Rice of 1953 has no artificial radioactivity. (2 examples). 3. Three samples tested at Hokuriku egricultural experimental station shows clearly the contamination of artificial radioactivity in the only, Grain, chaff, and bran are investigated). bran and chaff but no radioactivity in polished rice grain. lh. Two semples at Niigata agricultural experimental station have hardly any artificial radioactivity in the bran, and no trace at all in the polished rice grain. Ve