106 DASA 2019-2 or the hematological syndrome is that which occurs following doses in what we call the lethal range. Of course, we really don't know what the tethal range is for man, but it is guessed roughly to be between 250 and 450 rads. Owing to the effect on bone marrow, the reduction in the blood cella results in infections and the development o. bleeding results from the blood slatelet depression, and death may result. Then, of course, if there is recovery from these icute effects, there is the possibility of delayed effects of radiation occurring, such as leukemia, cancer and many other possible late effects. MILLER: I just :-anted to mention that the figure makea no mention of cataracts, the intrauterine effects of radiation and the possible genetic effects. CONARD: syndromes. It isn't meant to include organ efiects, only the major FREMONT-SMITH: It aleo doesn't yay anything about the central nervous system effects of low level radiation which you remember the Russians had always claimed were so and which we have always denied until we recently confirmed it at the Naval Radiological Laboratory. CONARD: All these syndromes overlap and there are many effects in each of. them. FREMONT-SMITH: [ wonder whether there ia anything in this group of peaple in terms of behavior which show that they had any of the low level radiation effects on the central nervous system, which apparently at the level of complex behavior patterns, conditioned reflexes, and so forth, are now recognized to be so? CONARD: Wedid not observe any, Frank, and at that time we didn't go into sensitive means of testing this sort of thing. We had many more important considerations. We didn't know whether they were going to live or die, or wnether we were going to have to request a hospital ship to take care of them and that sort of thing. FREMONT-SMITH: existed. CONARD: Yes. We weren't. And at the time we were also denying it