Measurements made by various investigators during the period between March 20226 are in agreement, Gamma revia is about 1. It is curious that the Beta- This would indicate that the bulk of the ash had by this time penetrated to the porsus wood structure of ths deck, thus absorbing the Betas. The Gamma radiation over most of the ship was approximately LO a.r. per hour when the ship arrived in port. If we extra- oo palate this. back to H # 3 hours, the tine the ash began to fall, the into. grated Gamma dose is about 100 R. Of course, the ash was falling from 4 plus 3 hours to about H plus 9 hours. If we take the mid=point of this period as the start of exposure we find the expogure is about 70 8. This, however, estimates the whole body Camma radiation from residual debris still on the ship when the first measurements were made,actualdose could have been 5 10, or even 100 tines higher depending on how mich asn was washed off the ship and at what time. We have made a number of discreet inquiries in the hopes that photographic film might have been available aboard the ship and might possi- bly be used as a dosimeter. All efforts to date have been negative. Deposition of Internal Emitters There was an urgent requirement to evaluate the extent to witich fission products had been absorbed into the tissues of the fishermen. As mentioned earlier, Dr. Nakaidsumi had concluded from his nouse axperiment that the prognosis for the fishermen was adversely affected by the probability of excessive deposition of long-iived bone-seeking isotopes. The Japanese scientists were desperately looking for an agent to mobilize these isotopes and Dr. Lewis believes that they had administered EDTA to the patients, despite the fact that urine analysis was beyond their capability and they were therefore unable to determine either the need f:r EDTA or the effect produced by it. ‘part from the fact that they were unable to undertake urine analysis at that time, it is also evident that they did not understand the dynamics of fission product metabolism ard vere not used to thinking in terms of urinary excretion levels as an index of absorption and deposition. They were arccious to provide me with samples of urine for State-side analysis. Two sampleg.werpe delivered on Merch 26 and five more on Marcn 3. As yet we have not received samples from the remaining 16 The samples received were properly forwerded to the Health and Laboratory and I hawe had the results of gross analysis of the oe I communicated these resulta to Dr. Kobayashi in the letter which is self-expiinatory. wwe 67 patients. Safety first two attached