—_— eA a a a 110 We hope to, in the future put our spectro knowledge on a more quanti- tative basis by the use of nuclear microg- copy. Thank you, MR, EISENBUD! The situation in the field of neutron mensurenents is probably the least satisfactory of all the fields of inetminmentation in which we have contractors despite the fect that many ine dividuals become, as our Chairman, for exe ample, spend a long time desling with many of these problems. DRe WARREN: Is it fair to say, Go you think that come of the biologics test: objeots are perhaps as good measure ing devices as we have, MR, EISENBUD: I surpose this is ' true, Doctor Warren of the highsr levels and over longer periods of time. It's pretty hard to take the site of an accelerator and get measurable cross-overs, material? DR. FAILLA! DR. WARREN? thinking of cancsr, Which biological I was particularly [2