UNIVERSITY of PENNSYLVANIA PHILADELPHIA 4 The School of Medicine February 29, 1952 DEPARTMENT OF DERMATOLOGY AND SyPHILOLOGY AND DEPARTMENT OF MICROBIOLOGY Epwarp D. DeLamater, M.D. Research Professor Dr. Joshua Lederberg Department of Genetics College of Agriculture The University of Wisconsin Madison 6, Wis. Dear Josh: Would you be good enough to send me as complete a set of your reprints on bacterial genetics as you have avail- able so that we can use these for refer- ence in our work? I would greatly appre- ciate this. I have been neaning to send you a couple of slides, and will do so in the very near future. I hope Miss Lively's work is coming along on the cytology of coli. How soon will she be ready to publish it? Best regards to you and your good wife. Sincerely yours, - DeLamater, «.D. BLD/a j Research Professor