THE UNIVERSITY OF WISCONSIN Madison 6, Wisconsin Office of the President April 24 ; 1957 Dear Dr. Lederberg, We were happy to receive the information that you have been elected to membership in the National Academy of Sciences. On behalf of the University of Wisconsin, I should like to congratulate you on this well- deserved recognition. I should like to take this opportunity to tell you again how proud we are of your outstanding accomplishments in the field of Genetics. Your scholarly contributions reflect credit not only upon yourself, but upon the Uni- versity of Wisconsin as well. We are happy to have you as a member of our staff. You have my best wishes for continued Success and happiness in your chosen field. With kindest regards, Yours sincerely, rege ; / Professor Joshua Lederberg 200 Genetics