The distinguished chemists in this volume were all members of the APS. Their bio. memoirs, selected from the archives of the Society, present a panorama of 20th-cent. discoveries and develop. in the study of Chemistry and the personalities behind them. They include: Josiah Gibbs, Jacobus Van’t Hoff, Louis Pasteur, Julius Stieglitz, William Noyes, Leo Baekeland, Gilbert Lewis, Moses Gomberg, Pierre Du Pont, Irving Langmuir, Gerty Cori, John Kirkwood, Albert Lehninger, Axel Theorell, Carl Cori, Carl Marvel, Feodor Lynen, Fritz Lipmann, George Kistiakowsky, Harold Urey, Harrison Brown, Henry Eyring, Joel Hildebrand, Joseph Miller, Lars Onsager, Paul Flory, Sir Hans Krebs, Vincent Du Vigneaud, Willard Libby, and William Giauque. Photos.