OAK RIDGE NATIONAL LABORATORY OPERATED BY CARBIDE AND CARBON CHEMICALS CORPORATION FOR THE ATOMIC ENERGY COMMISSION POST OFFICE BOX P OAK RIDGE, TENNESSEE January 30, 1950 Dr. Joshua Lederberg Department of Genetics University of Wisconsin Madison, Wisconsin Dear Josh: I was very pleased to learn that you are going to be down here to give a talk around February 16. I hope you will be amenable to the idea of attending a cocktail party in your honor the evening of the sixteenth at my apartment. It will be an opportunity for everybody to get together on a more informal basis than wheat is possible in the laboratory. If you could let me know your exact schedule, it would help us very considerably in making plans for your stay here, since I know the Giles' would like to have you visit with them, too. Is Esther planning to come with you? If not, please remember me to her. Thanks for the reprints. Sincerely yours, Seyfiour Pomper Biflogy Division SP:dv ie