BETSE: body radiation which te 300 mr per week and 50 mr per day. Now suppose you bad equilibrium of Sr” in your benes, you oan ask hov many nilacuries of Sr” you need to have in all of your bones in order to get that sane power of dose. This is a very sinple matter of arithustig and I believe that thie ia sound because the particles which finally do the damage are electrons in either case so they are particles ef low specific ionization, and if you have untform distribution, I suppose you should get about the right number, except for one thing, namely, thet your bone is probably not the most sensitive organ which you have in your body and the tolerance dose is meant for the most sensitive part of your body. I think you get anenia firet. If you assume the same tolerance dose of $0 mr per day, then this figure ought to be 10 microcuries of Sr” throughout your bones. Didn't you have to take the bone volume in this eslculatioa! BETHE: In this calculation ve assume the usual 7 kilograms of bong and we said that the ionization, the number of ions falling, {# in proportion to the mags, vnich is very nearly correct. COMAR: I mst point out that one figure has been used go from what you would get for even distribution compared to what you would actually get from the particulate distribution in bone, and this {s a value of ten. In other words, this is not «a good value but 1t is the best we have so we vould say that the Sr would te deposited mot in all the bose but in about 1/10th of the bone of the body. I suppose that this depends again upon the age of the individual. ‘The way we wanted to proceed, J think is very close to what you have nov been BOE ARCHIVES