the most recent information. Immediately after reading your statement, I cent you a’ copy of a speech which I gave re- cently regarding what we knew from scientific studies on fall- out radiation end its effects. I am enclosing with this letter a copy of a paper which I am presenting on April 26 before the American Physical Society. I hope these docunents will be of use to you. They demonstrate that an intensive eifort has been made to calculate on theoretical grounds, end to determine from sample collcctions, the actual levels of radioactivity in the soil, in water, in food products, and in human bodies as a result of weapons tests. If you have gained the impression that United States ffi cial statements do- not take into account the possivie it Zz e2a ment that you have - ‘i hasten to assure you that this is not the . case. Government statements have dealt extensively with this iatter. It has likewise been considered at length ina revoxt prepared by scores of eminent scientists for the ational Rec deny of Sciences, and in England by the British i L Research Council, both reports appearing in June of Particularly since the summer of 1953, the £tomic sy Commission hes conducted an intensive study of world- wide fallout which has revealed iicst of the information now available on this subject. These studies have include analysis of soil, plants, foods and other materials from many parts of the vorld. The United States Government hea rurnisned this information without reserve to the United nations Scientific Committee on Atomic Radiation, which was established at the recornendation of the United States and “nich nas studied cata provided by other countries. Altheugh tnere are some differences in the findings of schentists in this ccuntry and abroed, there is general Aeresicat ppon the é@¢oproxitrate waynitude of the fallout and the vate at which it is descending fro:a the stratosphere. Perhaps there is less a4zgreencnt ebout the magnitude of the vuysiolozical effects which can be expected to resvlt from Tallent cadiztion. Neverthetess, it is very generally ézgreed, acong those who have studied the quistion, that the redistion sipesuves fron fallout é@re very vouch svraller than those which (::0re)