NATIONAL ACADEMY OF SCIENCES OFFICE OF THE PRESIDENT 210! CONSTITUTION AVENUE WASHINGTON 25, D.C. 25 August 1959 Dear Dr. Lederberg, I am sorry that various extended trips during the summer have so long delayed my reply to your letter of 10 July. I am delighted that you will serve as a member of the Space Science Board and I fully understand the conditions which will limit the amount of time you can give and the amount of traveling you can do. It will be helpful to have the benefit of your interest, enthusiaem and wisdom. With cordial regards, I am Yours sincerely, Quark» “Tiare Detlev W. Bronk Professor Joshua Lederberg Stanford University Stanford, California