PrefaceSix Lectures on Selected Topics in Immunochemistry Tokyo, September-October, 1955 I. Immunochemistry—Past, Present, and Future II. The Chemistry of Antigens and Antibodies III. Development of Quantitative Analytical Methods in Immunology—The Precipitin Reaction IV. Bacterial Agglutination and the Consequences of Quantitative Studies on the Precipitin and Agglutinin Reactions V. Relations between Chemical Constitution and Immunological Specificity VI. Complement and Immune Hemolysis VII. Immunity. Paris, November, 1946 VIII. The Formation, Measurement, and Persistence of Antibodies in Man after Immunization. Marburg, March, 1954 IX. The Precipitin Reaction and Studies of Native and Denatured Proteins and Derivatives. New Brunswick, New Jersey, January, 1954