261 There's no significant difference in the number of anomalies between the irradiated and expcsed - at the levels as far as we have gone, FREMONT-SMITH: nw WwW = DONALDSON: DONALDSON: No significant increase one way or the or 0 other, TAYLOR: TAYLOR: 10 DONALDSON: au WARREN: 12 DONALDSON: 13 14 No increase? What is the LD-50 dese for a salmon? DONALDSON: AYRES: An acute dose is between 450 and 500 r. You'regiving them about 500 r, aren't you? Chronic exposure. Daily, We'll give 500 r this year. That's a time when cell re production is rather rapid, though. 15 DONALDSON: 16 WARREN: That's right, At their rate of m@éximum growth and change. 17 Presumably this should be the most sensitive period, shouldn't 18 it? FREMONT-SMITH: 20 21 AYRES: The most vulnerable pericd, On the other hand, recovery can be more rapid. 22 TAYLOR: 23 LANGHAM: Why don't they ali die, is what I'm asking? It's the dose range. There's a lot of 24 difference in giving 4 dose in five minutes and over a hundred 25 days. 26 TAYLOR: Is it a factor of 2? 27 DUNHAM: Your monkeys all had lethal doses, as you 28 Showed yesterday, 29 30 31 32 33 LANGHAM: Yes, And the prompt lethal dose of the monkeys is about 550 r. FREMONT-SMITH: Please, gentlemen, don't have a private conversation because it makes it impossible. Stafford warren UPTON: DOEMUCLA I think a smiliar experirent has teen in 62