72 rather hopeless experimenting in that level. One would have to go many, many fold up in the concentrations of isotopes, and there I thought the effects were essentially additive. Do you happen to remember any of the experimental data? DR. DUNHAM: I know of no experimental data that is comparable to this situation. Alderson Reporting Company Washington, D. C. DR. BUGHER: 10 Exposure levels of 1,000 microcuries of strontium with 11 animals also given x-ray. DR. DUNHAM: 12 13 15 some whole body radiation. 16 at in this light. 17 DR. BUGHER: 18 DR. CLAUS: He has also given “That matter might be re-looked It is pertinent here. I think you could extrapolate from 19 Fridell's work if he has not actually done it, and say if 20 you give an animal enough internal emitter so that: he is 21 pretty close to the borderline, and then you add x-ray on 22 top of that, you will get more than an additive effect, 23 because the effect due to one isotope is partially 24 compensated by other organs in the body. Departmen t of wo 1 The closest would be Fridell's work, where you were concentrat ing the effects in different organ systems. 25 ister ae I know of no such class data. 14 ARC i: No, nothing comparable to this. 3 ry a LY Whereas if you inactivate these other organs, then you will meet more than hora a7 fe bas a ! cece yo "3