Qu Dr, biyake raised questions about whether in livu of the laborious cleansing methods used in American laboratories it would be possible to use a plastic film on equipment and throw it away whenever it was contaminated. Dr, Sterling Hendricks of the American delegation recounted efforts to do this, using silicones, but said they had not been satisfactory, Dr, Harley stated that equipment made of polyethglene, such as beakers, and flasks, were satisfactory if heat is not applied to them. From water supplies and laboratories the discussion then moved to dzcontamination of human beings who rective a dusting or a dousing with radio- active matcrials. Dr. walter Claus of the American Delegction outlined the methods of decontaminating human skin, His formula was brief and simple -wash with copious quantities of soap and water, using a mild abrasive if necessary to loosen a sticky contamination. The abrasive used in America is corn meal -- a substance which puzzled the Japanese conferees somewhat. Later in the day a sample of corn weal was shown to indicate the kind cf substance it is. During this discussion the question was raised as to whether the methods used for decontaminating human skins could be used for decontaminating vegetables, Dr, Claus answered that the same principles applied -- wash with copious quantities of water. In addition, of course, he noted, many vegetables are Peeled or outer leaves can be removed and the contamination thus taken away. The question of getting out of the animal and human body radioactivity that has been taken in with food or water brought a lively consideration of inste-nees in which ethylenediamine - tetraacetic acid salts of calcium or sodium took strontium and plutonium from animal bone structure. The conclusion reached in a colloquy between United States delegate Jisenbud and Japanese delegate Dr, hiasanori Nakaidzumi was that to be effective in carrying out of the body through excretion plutonium or strontium, 4DTA (the common chemical name for this substance) must be administered very soon after the plutonium or strontium are swallowed; otherwise these elements will become fixed in bone and the Da will not take them out. The afternoon session started at 1 F.M, with Mr. Bisenbud presiding, In the first place, Dr, Hiyama made a brief explanation about the result of investigations of the Shunkotsu-maru. He introduced hts own theory regarding the contamination of the sea and its fauna and flora based upon the overall researches made of the tuna fish ]anded and the investigation carried by the United States delegation. Using printed matters and chart, Dr. Narasawa supplemented Dr. Hiyama on the radioactive measurement of the tuna fish which was abandoned, Dr. Boss made supplementary explanations and observations. Dr, Miyake then made a general observation, using charts, on the result of measuring the radioactive rainfall which fell in various cities and towns in Japan this spring. Interesting questions and discussions took place on the rainfall by Dr, Shimizu, Mr. bisenbud, Dr, Nakaidzumi and Dr. Nakamura, (more)