50 A not more than one per cent. DR. CLAUS: MR, COHN: Do you want to talk about your concept? Yes. Our findings are a little differen t perhaps due to the different approach. we took. While these figures on the board represent amounts of body burdens calculated on the basis of I-131, assuming various assumptions, our approach was a little different, in that we derived our estimated body burden extrapolating from animal data. What Alderson Reporting Company Washington, D. C. we did brieflywas to sacrifice two pigs from the island 10 after getting a very accurate control of their urinary 11 excretion for 24 hours at 81 days. 12 radiochemical analysis on all the separate tissues of this 13 pig, and also on the urine. 14 At the same time we did a complete analysis of a 15 human sample taken at just about this time, and extrapolating 16 from the pig data to the human, we cons 17 total body burden of beta of .33 microcuries at8l days. 18 If vw extrapolate this back to 30 days after irradiation, 19° this is a considerably difficult thing to do. 20 extrapolations are based on animal studies, particularly 21 Hamilton's work in which a constant falloff of activity is assumed, ARC Then we did a complete out with values of Most- We know that this is not the case. The only evidence that I know of in human strontium inhalation probably is one case at Brookhaven. We based our data on the rate of excretion of this inhaléd strontium of