«Aa SCHELL Well, my ixpressionof the problem resoves iteslf in the that as fer as the insolt, the enallest possible thing which we might be concerned with, that is the createst hasard fron] the wali] mallest ancunty wold be the carcinogente effoct of ratlatior VOICE: What doca this term "insult" asan? MITCHELL: Well, it mens demare to tissues <= dasace of an wi port, We are aceking then the threshold, in other vords, point at which we are concerned on the lowest possible of radioactive of any kind of material, You very rapidly coq dam to the fact, for instance, in the bonb condition that it'd - going to be radioactivity, eince dust and climatic changes and all that apparently are several orders of magnitude avay fic constituting a hasard, And then you begia te ecneern you with the biokogical eftects of radioactivity, will, we bbw for instance, that radioactivity can cance necrosis of tiesued But the encunt necessary to cause necrovis is probsblya bs arid} : thousend tires the amount necessary te cance a fairly 6! mic cont maer of carcinenes over a period of tints se tant (an. = the gross effects on tissuny by the time you are getting ¢ | predicting what would happen te a species of aninal over b Lifetine, you would be killing all of then, say by tumors, |i¢ you ever cot to the point vhere you were causing real. seve: danae@s 1f not all of then, at least a alenificant aunts! Fer instance, when you take the radius experience «= now ny flaw here are pretty general, but of the people who had necrosiq bene dus to radium, the incidence of bone sarconas was —_ of 139