In actuality the tolerance value calculated by the two setiods, Dr. Bugher, I think comes out very close if you put in the factor of 10, which is shat the group has done. In other vords, tt comes out almost identical. When you take 1 aicrocurie of radium and if you then take into account the ratio of energy of radius as compared with etrontius, which is about 10, and in addition the factor five for effectiveness of isotopic versus _ beta topics, you came te five sierocuries--vhioh certainly agrees within the accuracy of these numbers. I am just pointing cut that there has been an intersational agreement on this case on the tolerance figure and that is the one on which we vorked and it is the only one whieh existe, and the general acceptance is that of 1 mficrocurte body burden for Sr’”. BETHER;: Well, it strikes me as a somewhat low figure. COMAR: Well, I think that it makes a difference vhether you are going to talk about the stuff going into an adult with a bone formed or being formed altogether. As it goes into the adult it only goes into one-tenth of the bone, and you have to take a tenth of your figure whieh brings it down to ome microcurie. If it is formed right from the beginning, viny then it ts attributed to all the bone, and you wouldn't have to take « factor of ten. BETHE: It seems to me that it is in agreement. With this I agree entirely. DUE ARCHIVES