Introductory remarks / Herman Friedman -- pt. 1. Cellular interactions and thymus function in the immune response: T-cell regulation of immune responsiveness / J.F.A.P. Miller ; "Signal theory" in cellular immunology : collaboration between T- and B-lymphocytes in the immune response / Henry N. Claman ; Ontogeny of thymus cell function / A. Chakravarty [and others] ; Mitogens and T-cell heterogeneity / Richard W. Dutton ; In vitro induction of thymus-derived cell-mediated cytotoxicity to trinitrophenol-modified syngeneic lymphocyte surface proteins / Gene M. Shearer ; Identification of [¢]-bearing T-cells derived from bone marrow cells treated with thymic factor / H.C. Miller and W.J. Esselman -- pt. 2. Thymus factors in cellular and humoral immunity: Thymic hormones? / A.J.S. Davies ; Factors influencing activation of B-cells in immunity / Gèoran Mèoller and Antonio Coutinho ; Humoral thymic factors influencing postthymic cells / Osias Stutman ; Cellular interactions controlling the immune reactivity of T-lymphocytes / Irun R. Cohen and Michael Feldman ; The role of the thymus in spontaneous autoimmune thyroiditis / Noel R. Rose -- pt. 3. Preparation and characterization of thymic extracts: Purification and properties of bovine thymosin / John A. Hooper [and others] ; Thymosin-induced differentiation of murine thymocytes in allogeneic mixed lymphocyte cultures / Geraldine H. Cohen, John A. Hooper, and Allan L. Goldstein ; Examination of lymphocyte membranes of athymic "nude" mice by scanning electron microscopy / Gary B. Thurman, Paul S. Baur, and Allan L. Goldstein ; Isolation and quantification of LSH and the evaluation of related serum basic proteins in normal adults and cancer patients / T.D. Luckey and B. Venugopal ; The isolation of thymopoietin (thymin) / Gideon Goldstein ; Isolation, biochemical characteristics, and biological activity of a circulating thymic hormone in the mouse and in the human / Jean-Franðcois Bach [and others] ; Further characterization of an antibody-stimulating factor isolated from bovine thymus / W. Gerry Robey ; A hypocalcemic and lymphocyte-stimulating substance isolated from thymus extracts, and its physicochemical properties / Akira Mizutani [and others] ; Immunosuppressive [gamma] globulin from bovine thymus and serum : mode of action upon afferent and efferent arcs of the mouse immune response / S. Michael Phillips, Charles B. Carpenter, and Patricia Lane -- pt. 4. In vitro effects of thymus extracts and products: Activation of immune competence by thymus factors / Amiela Globerson, Tehila Uniel, and David Friedman ; A T-cell-produced mediator substance active in the humoral immune response / E. Wecker [and others] ; Stimulation of B-immunocytes by a T-cell factor produced in mixed leukocyte cultures / Herman Friedman ; Influence of thymosin on the induction and regulation of the secondary response in vitro to diphtheria toxoid / Benjamin Wolf ; Antigenic and functional evidence for the in vitro inductive activity of thymopoietin (thymin) on thymocyte precursors / Ross S. Basch and Gideon Goldstein ; Thymosin : effects on normal human blood T-cells / Joseph Wybran [and others] ; Activation of T-cell rosettes in immunodeficient patients by thymosin / D.W. Wara and A.J. Ammann ; regulation of [¢]-antigen expression by agents altering cyclic AMP level and by thymic factor / Marie-Ann Bach, Catherine Fournier, and Jean-Franðcois Bach ; T-lymphocyte maturation and antitumoral effect of a thymic extract obtained from a stimulated model / B. Serrou [and others] ; Effect of thymic factors on the differentiation of human marrow cells into T-lymphocytes in vitro in normals and patients with immunodeficiencies / J.L. Touraine [and others] -- pt. 5. In vivo effects of thymus extracts: Influence of thymus extracts on the maturation of the immune response in neonatal mice / W.S. Ceglowski and G.U. LaBadie ; The nature and mechanism of stimulation of immune responsiveness by thymus extracts / Nathan Trainin [and others] ; Early cellular events in the response of mice to sheep red blood cells reflected by changes in the spleen level of cyclic AMP / Otto J. Plescia [and others] ; Mitogenic activity of polyadenylic-polyuridylic acid complexes / Ihn H. Han and Arthur G. Johnson ; Stimulation of antibody formation through polypeptide thymic fraction (TP) in irradiated animals / S.M. Milcu [and others] ; Influence of thymus-corticotropin-growth hormone interaction on the rejection of skin allografts in the rat / J. Comsa, H. Leonhardt, and J.A. Schwartz ; Extraction, fractionation, and testing of a homogenous thymic hormone preparation / J. Comsa ; Involvement of T- and B-lymphocytes in the immune response to the protein exotoxin and the lipopolysaccharide antigens of Vibrio cholerae / John R. Kateley, Chandu B. Patel, and Herman Friedman ; Stimulation of cAMP levels and modulation of antibody formation in mice immunized with cholera toxin / John R. Kateley and Herman Friedman ; Role of T-cell immunoglobulin in cell cooperation, T-cell suppression, and antigenic competition / Marc Feldmann [and others]. Effect of thymosin on thymocyte proliferation and autoimmunity in NZB mice / Norman Talal [and others] ; The role of cortisone-sensitive thymocytes in DNA synthetic responses to antigen / P. Cohen and R.K. Gershon ; Transfer of hypersensitivity by thymic extract / Elias G. Elias and Robert M. Cohen ; The relationship between CFU kinetics and the thymus / E, Frindel and H. Croizat ; The absolute requirement for T-cells in the induction of IgM-secreting cells, in vitro / Ko Okumura and Milton Kern ; In vivo studies of differentiation of thymus-derived leukemic cells / Anna D. Barker and Samuel D. Waksal ; Induction of T-cell differentiation in vitro by thymus epithelial cells / Samuel D. Waksal [and others] ; The effect of antithymosin globulin on the recovery of T-cells in ATS-treated mice / Marion M. Zatz [and others] -- pt. 6. Role of thymus factors in immunity : perspectives: The nature and function of T-cell antigens / M. Schlesinger [and others] ; Nature and biological activities of thymus hormones : prospects for the future / Abraham White ; Lymphocyte differentiation from precursor cells in vitro / M.P. Scheid [and others] ; Ir genes and antigen recognition / E.M. Shevach [and others].