FEB 191965 UNIVERSITY OF WASHINGTON SEATTLE, WASHINGTON 98105 Department of Mathematics _ is closely related to the research topic of one of my Ph.D. February 17, 1965 Professor Joshua Lederberg Department of Genetics Stanford University School of Medicine Palo Alto, California Dear Professor Lederberg: I am very much interested in your vaner entitled 'Tonological Gravhs of Crganic Molecules" which has just apveared in the , ‘Proceedings of the National Academy of Sciences-" I should \Wereatly annvreciate your sending me a reprint of it, and in kG ( fact, two reprints if you can svare them, because the subject students. 0 9/M Under senarate cover I have sent you 4 recent resort by me entitled "Convex Polytopes and Linear Programming". (This will appear later in the year in an IBM nublication)-. while the general emphasis of the report is rather aside from your interests, I think that pages 26-40 may be of some interzst to you since they deal with the structure of graphs of the sort detailed in your narer- Some of the material of the following section may also interest you. I should mention specifically the fact that Bouwkamp and some of his colleagues at the FPhilins Research Laboratories in Eindhoven have compiled a table of all triply connected planar graphs having uv to 19 edges» Also available are pictures of all of these granns wnich have no more than 17 edges. I should greatly ap~reciate your ~utting me on your nailing list for any future reprints which deal with problems of a combinatorial nature as I am much interested in combinstorics in general, and more svecifically in connection with sciences other than mathematics. Yours sincerely, Victor flee Professor of Mathematics VK irnk