Polytechnic Institute otf New York 333 Jay Street Brooklyn, N.Y. 11201 July 11, 1975 Professor Joshua Lederberg Stanford University Palo Alto, California 94305 Dear Professor Lederberg: I recently read an article quoting you as having Said that the genetic damage from background radiation was costing the United States the order of $10 billion per year. If this statement was in fact made by you, would you kindly send me a reprint or report which elaborates on the statement. It is an important remark which T would like to follow up. Sincerely yours, C Lama ohn R. Lamarsh Department Head Nuclear Engineering JRL: bg