1. R. H. Flocks, H. D. Kerr, H. B. Elkins, andD. A. Culp, J. Urol.71, 628 (1954).
2. C. C. Stock, in:Advances in Cancer Research, Vol. 2 (Greenstein and Haddow, Academic Press, Inc., New York 1954), p. 426.
3. Presented at the National Meeting of the American Association for the Advancement of Science, Berkeley, California, December 1954.
4. The original transplant material was donated by Dr.John B. Field, Cancer Chemotherapy Laboratory, University of Southern California.
5. Donated by: Dr. W. C. J. Ross, The Chester Beatty Research Institute, The Royal Cancer Hospital, London, S.W.3.