99 50 per cent incident level of these opacities was at 50 r at the half year. at a year, This continues to go down in total dose a year and a half and two years, DR. DUNHAM: It was my understanding that the macaques at Austin, Texas, have failed to show any opacities, many of whom must have gotten more than 100 r a year after I heard about it. MR. HARRIS: I talked to the monkey man, and they are now getting opacities that were exposed to 14 NEV neutrong. Alderson Reporting Company Washington, D. C. 10 DR BOND: Isn't the threshold for cataracts in mic Pp 11 usually lower than for other animals? 12 data be the Japanese data? 18 MR. HARRIS: Wouldn't more suitable - This is a definitive cataratt you 14 are talking about. 15 detectable opacity. 16 disturbing situation in mice, which is really to squeeze the 17 mouse behind the neck and his eyes pop out, 18 Sideways, and you can see it. 19 disturbing situation, and the threshold there is similar to 20 that found in Japan, or the incidence level is similar to wha 21 has been found. What I am talking about is a smallest When you take mice, then for a true visi Do and he looks This is certainly a vision It was stated about 500 REM equivalent and it runs that wey for mature cataratts in mice. 23 DR. DUNHAM: ARC These are presumably going to be gamma ray cataracts, if due to anything, = MR. HARRIS: ¥ will have x-ray cataracts and gamma ‘ /0