BUREAU OF LABORATORIES FRIEND LEE MICKLE, So. D. DIREOTOR LABORATORIES P 0. BOX 1189 1179 MAIN ST. TELEPHONE 7-6341 GOMMISSIONER OF HEALTH STANLEY FH. OSBORN. M. D.C. P. B ‘STATE OF CONNECTICUT DEPARTMENT OF HEALTH HARTFORD 1, October 20, 1947 Dr. J. Lederberg Department of Genetics University of Wisconsin Madison, Wisconsin Dear Doctor Lederberg: Thank you for forwarding reprints of your recent studies. I hope you will continue to keep me informed of further investigations. Wheeler and I were both sorry that we did not have the opportunity to visit you while you were working at the Osborn Laboratory. We were on the verge of going to see you several times but.something always seemed to come up which prevented our visit. With kindest regards and best wishes. Sincerely yours, Assistant Director EKBAM