THE UNIVERSITY OF WISCONSIN 468 Laboratory of Genetics t4Y Genetics Building MADISON, WISCONSIN 53706 Department of Genetics Department of Medical Genetics College of Agriculture School of Medicine Dear Josh: Here is the chemical mutagenesis report that I should have sent you long ago. Also included are some letters relating to it; these are confidential, of course, but I thought you might find them helpful. The letter to Marge is in response to a note from her (appended to a letter about bther things) asking if I knew anything about your program. As always it was pleasant and stimulating to visit with you. Give my best wishes to Marguerite and David. Sincerely bom v sul is