COLLEGE OF AGRICULTURE UNIVERSITY OF WISCONSIN MADISON 6, WISCONSIN DEPARTMENT OF BIOCHEMISTRY October l, 1956 Dr. Joshua Lederberg Department of Genetics Dear Dr. Lederberg: I am enclosing a cooy of cur report on germ-free animals. This is not the final copy, but Ltelieve you can obtain the general dea from this report. I find that I on?+ have one copy of the final report and you are free tc look at it, but I hate to let it out of my office in case it gets lost. Sincerely yours, Lo Fe G pow jem C. A. Hlveh CAE:em Enclosure