THE UNIVERSITY OF CHICAGO CHICAGO 37+ ILLINOIS INSTITUTE OF RADIOBIOLOGY AND BIOPHYSICS 6200 Drexel Avenue October 7, 1949 Dr. Joshua Lederberg Department of Genetics University of Wisconsin Madison 6, Wisconsin Dear Dr. Lederberg: We are now getting ready to announce your lectures at the University of Chicago on November 4 and 7, and I am writing to ask whether the provisional title that you gave in your letter of July 26 -- “Sexual Reproduction and Genetic Recombination in Bacteria” -- may be used, This title sounds very attractive, but if you wish some other would you kindly let me know as soon as possible, Yours very Sincerely, 71 T. R. Hogness Director