100 cataracts and thermoneutron cataracts. The opacity incidence in x-ray animals and the opacity incidence in 4 MEV gamma animals is about the same level, 50 per cent incidence. It is almost exactly the same level, although ‘|the lethality of MEV is much less for the 4 MEV animals. This would be out if it would do you all any good in figuring DR. DUNHAM: Alderson Reporting Company Washington, D. C. MR, HARRIS: is called a mature cataract, not threshold but 50 per cent 11 level, was at appund 500 roentgens. 12 DR. DUNHAM: What was the threshold for opacities? 13 MR. HARRIS: They were not lookim 14 DR, DUNHAM: 16 that somebody can get out there and look, and establish a 17 base line on these people, the better. CDR. CRONKITE: DR. DUNHAM: 21 CDR. CRONKITE: ARC 24 25 mancetmart of Energy j Somebody has looked. We got a long involved report a few days ago. 20 23 meg Certainly that leaves it such that we are going to have to look, probably the sooner the better 22 nome for those. 15 19 SACAWES X-ray threshold in rabbits for what 10 18 soa ata £fi tatecpun's Hifes What was the gamma threshold in rabbits’ This I didn't know. We just received it. known it had been done either. MAJ. HANSEN: I had not It is something you initiated. I think it. actually started with the return of the Air Weather personnel, and the other American personnel to Tripler at which time we asked Col. Lowry, who Ww out what you are going to look at these people later.