July 28, 1982 Dr. S. H. Hutner Haskins Laboratories 305 E. 43 Street New York 17, N.Y. Dear Hutner: I have besn wondering whether it would not be amising to do some genetic work with Athiorhodaceae. The local strains are not toossatisfactory, aa they take almost forever to grow up under technically suitable conditions, 1i.e., as aerobic single colonies on agar. It was suggested that as you have been keeping cultures for some time under sercbiec conditions, they might ba better adapted for my interest. Do you have a Rhodospirillum rubrum that forms pigmented single colonies on agar (which?) with reasonable celerity? I remembsr you were a little disccuraged about your caper as deliverad at the CSH mesting. The printed paper in the volume is a very creditable joo, and should mote than conpensate for your inmediste discouragement. Sincerely, a Joshua Lederberg