March 3, 1975 ate YW 5 ‘ Dr. Ole Maaloe University Institute of Microbiology Oster Farimagsgade 2A Copenhagen k, DENMARK — BA Dear Ole, This is just to remind you to please send me the reference, or reprint copy, of the paper that you mentioned that deals with theoretical limits on bacterial growth rates. If you do know of published references to doubling times of bacteria bbasides a review by Tom Brock, I would be grateful to you for it. I guess I do not even want to begin to start a discussion of the Asilomar Conference which was one of the most complex enterprises any of us has been involved in. I guess after Sleeping on it, I wish I had taken a more example setting stand than I did and which is of course ny actual intention in the laboratory. It really would have been very simple to suggest that without quibbling about the actual level of biohazard that we all commit ourselves at the very minimum to the use of newly constructed safer vectors on top of the obvious requirement for the improvement in the standards of laboratory hygiene that I think others have much to catch up upon, It was good to see you again, Sincerely yours, Joshua Lederberg Professor of Genetics | JL/rr