ATTACHMENT 2 The Matter of the toxicilogy of plutonium and the way it will be distributed in the body are under consideration by the medical division. The question of tracer studies to find its (ILLEGIBLE) program, although it has never been planned as a part of official descriptions of the program. Recent discussion with (ILLEGIBLE), it is obvious that the studies can be (ILLEGIBLE TEXT). Sufficient quantities to study the chemical toxicology will not be available for some time, and it will probably take (ILLEGIBLE) large amounts to demonstrate the radiological damage that might be caused by the alpha radiation. Robert Stone, M.D.