Summary of informal discussion on biostatistical and epidemiological factors in Hodgkin's disease.

1523 A Review of Isozymes in Cancer. Wayne E. Criss. 1543 The Effect of Age at Exposure to a Sublethal Dose of Fast Neutrons on Tumorigenesis in Male Rat. T. J. Castañera,D. C. Jones, D. J. Kimeldorf, and V. J. Rosen. 1550 Inhibition of Chemically Induced Neoplasia by Immunization with an Antigenic CarcinogenProtein Conjugate. Richard M. Peck and Evelyn B. Peck. 1555 Urinary Polyamines in Cancer Patients. Diane H. Russell, Carl C. Levy, Stephen C. Schimpff, and Inez A. Hawk. 1559 Stimulation or Suppression of Métastases with Graded Doses of Tumor Cells. Romain R. Vanwijck, Elizabeth A. Godrick, Howard G. Smith, Jonathan Goldweitz, and Richard E. Wilson. 1564 Cartesian Diver Studies on Respiration and Glycolysis of High and Low Sarcoma Lines. J. D. Lutton and M. J. Kopac. 1570 Genotype-dependent Modification of Sarcoma 37 Growth in Castrated Mice. George L. Wolff. 1573 Cross-linking of DNA by Alkylating Agents and Effects on DNA Function in the Chick Embryo. Jerome J. McCann, Timothy M. Lo, and D. A. Webster. 1580 Induction of Tyrosine Aminotransferase and Amino Acid Transport in Morris Hepatomas and in Adult and Neonatal Rat Liver. Robert D. Reynolds, David F. Scott, Van R. Potter, and Harold P. Morris. 1590 Comparison of Local Cellular Reaction to Tumor Grafts in Mice Treated with Some Plant Polysaccharides. Reiko Tokuzen. 1594 Normal and Cancerous Tissue Transplantation in Allogeneic and Syngeneic Xenopus laevis. Irandokht Hadji-Azimi and Michail Fischberg. 1600 The Uptake of Tritiated Methotrexate by an Experimental Glioma. Charles H. Tatar. 1606 Leukemia L1210 Therapy Trials with Antileukemia Serum and Bacillus Calmette-Guérin. Arnold E. Reif and Chung-Ai H. Kim. 1613 Differing Responses to Radiation of Murine Bone Marrow Stem Cells in Relation to the Cell Cycle. John T. Chaffey and Samuel Hellman. Volume 31 / Number 11 / November 1971