4k ‘yes +? 35 at the beginning - and there is the fallacy I think, so far as mine ventilation is concerned. While it has a big effect on the price of the ore, by the time you get it into a reactor or into a bomb that differential is insignificant, DR. BUGHER: But it should raise the auestion as to whether A.E.C. should be en=- couraging uranium mining on the Colorado Pils- teau if cunplies from other countries are avellable at substantially lover costs, DR. CLAUS: * study underway There is another observing the workers in nine uranium mines in which radon concentration has been high and this has been roing on -- not the study, but the mining has been going on for some years and I think out of this survey there should be much better information as to the possibility and incidence of lung enncer in the American mining ecanps, I'm referring to Michigan, There are some in Montana and, are you doing some in New York mines? MR, EISENBUD: Those have already been done, but of course the ones we have to get more information on is. fouth African