OUNT sy aS MOUNT SINAI SCHOOL OF MEDICINE MEM of The City University of New York See of FIFTH AVENUE AND 100TH STREET*NEW YORK, N.Y. 10029 Graduate School of Biological Sciences April 14, 1975 Professor Joshua Lederberg Department of Genetics Stanford University School of Medicine Palo Alto, CA 94305 Dear Professor Lederberg: In November I hope to make a trip to the West Coast. I would like very much to visit you some time during the first three weeks of November. At that time I could give a talk on branched structures, a subject which excites me very much. Enclosed is an abstract of the subject. The talk could be a departmental seminar with the subject confined to limited areas of your choosing. Al- ternatively (or in addition) I could give a talk to a general scientific audience. At the risk of being immodest I can say I have something new to contribute on all the topics given in the abstract. Sincerely, grald Oster — ofessor of Biophysics Encl. t Ne «) ay) io ‘ if we