THE UNIVERSITY OF CHICAGO CHICAGO 37°‘ ILLINOIS INSTITUTE OF RADIOBIOLOGY AND BIOPHYSICS March 8, 1949 To - Dr. A. D. Hershey Dr. Bernard D. Davis Dr. H. J. Muller Dr. Sewall Wright Dr. Joshua Lederberg Change of Plans I am writing to inform you that the meeting tentatively scheduled (jointly with Dr. Luria) for the weekend of the 30th of April in Chicago will not take place at that time. It will be held at a later date which will be communicated to you as soon as it is set. This change became necessary because Luria and Delbreek plan to have a meeting on phage which will probably be held between the 7th and 9th of April in Bloomington or some other place other than Chicago. Leo Szilard 1s/sl