OCT 1% 1962 S IENCE AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE 1515 MASSACHUSETTS AVENUE, NW, WASHINGTON 5, D.C. © DUPONT 7-7171 October 11, 1962 Professor Joshua Lederberg Department of Genetics Stanford University Medical Center Palo Alto, California Dear Professor Lederberg: The compilation of a good index is a tremendous chore which we do not choose to undertake. Perhaps it is well to yield to Nature, one area of superiority. We trust that in due course that will be the only one. Sincerely, Lage t. Qsebom , Philip H. Abelson x 2 Editor 95 /24y PHA:ka