68 & problem then is what is the effect of a large dose over a short period of time to the bone or bone marrow in this early interval, that is, in terms of possible carcinogenic effects later. This is a problem that has not been explored to any extent at all. Animals are certainly not humans, but certainly that we should consider. DR. CLAUS: You would not expect these other substances to be present in the bone? Alderson Reporting Company Washington, D. C MR. COHN: ARC Yes, there are a number of other bone 10 seekers, 11 fission yield, but due to the fact that the half life is 12 so short, after 30 days we do not pick them up. 13 were radiating this bone during the interval. 14 15 I have a list of 15, DR. CLAUS: that are present in high enough But they Would you hazard any guess how much there is of that, compared to this? 16 MR. COHN: 17 DR. CLAUS: It could be calculated. If there is any likely tumor 18 formation from this stuff, and an equivalent amount of small 19 quantity in the bone for the short periods of time that these 20 are there, we are in a bad way as far as our permissible 21 levels are concerned, because this is just a little bit 22 over what we claim to be a permissible level of strontium 23 89 for a lifetime. MR. COHN: DR. CLAUS: Yes. This is for a relatively short time, ant’ ¥ eee’ bf