MICHIGAN STATE COLLEGE EAST LANSING SCHOOL OF SCIENCE AND ARTS March 21, 1955 DEPARTMENT OF BACTBRIOLOGY AND PUBLIC HEALTH Joshua Lederberg, Dept. of Bacteriology, University of Wisconsin, Madison, Wisconsin, Dear Mr. Lederberg: I would appreciate it very much if you would send me cultures of the following E. coli: K12, Y10 and Y24. Thank you very much, Sincerely yours APp 0 Antone K, Fontes Dept. of Microbiology AXF/ah etATE Co . ‘eo of @ x Bes = wu ona . = ie entennial “IT IS FOR US THE LIVING TO BE DEDICATED HERE TO THE UNFINISHED WORK Lae 1855-1955 LINCOLN