That is right, so that it doesn't looks on the basis of this, as theagh we need to worry for the moment, but there are larte ranges ef uncertainty. I can't help feeling, in spite ofiwhat has been said about the effects of errosion and wea and jost left there. At the bottom of the oceans and prevably even to some extent in the upper atzogphere. LIBSYs I can't believe it wo:ld atay up there so long as to dec HILL: Yell, we don't know. LIBSYs Well, rerbape we have learned one lesson from this loox i the data available at the present and that is that there is stiff is the atmosphere and it does stay there for quite a while wide dissemination fe extremely likely. world- ‘This is not a conclusions. HILL Oh, another thing that is involved in this is the effect could, in your samplea, get some indicatien of the fraction total activity there that is due to Strontium 90 as a functios of tine after the shot or distance away from the shot. LIZUYs Co you still have those samples, “r. Eisenbud? NYSZN SDs We have only a few of them. L Oh, excellent. oYa They are being processed. se nety . I ‘ 2 HY