SOCIETY OF AMERICAN BACTERIOLOGISTS OFFICE OF THE PRESIDENT CHARLES A. EVANS DEPARTMENT OF MICROBIOLOGY UNIVERSITY OF WASHINGTON SEATTLE 5, WASHINGTON December 17, 1959 Dr. Joshua Lederberg Department of Genetics School of Medicine Stanford University Palo Alto, California Dear Josh: Thanks for your letter of December 14. Your comments as usual were right to the point and very helpful. Your suggestion about Luria is an excellent one, and I will look into this further. With best wishes, a a Charles A. Evans President CAE 7 rm1L