These volumes are collections of the Nobel Lectures delivered by the prizewinners, together with their biographies, portraits and the presentation speeches for the period 1971 - 1990. Each Nobel Lecture is based on the work that won the laureate his prize. New biographical data of the laureates, since they were awarded the Nobel Prize, are also included. These volumes of inspiring lectures by outstanding chemists and biochemists should be on the bookshelf of every keen student, teacher and professor of chemistry as well as those in related fields.Below is a list of the prizewinners during the period 1971 - 1980 with a description of the works which won them their prizes:(1971) G HERZBERG — for his contributions to the knowledge of electronic structure and geometry of molecules, particularly free radicals; (1972) C B ANFINSEN — for his work on ribonuclease, especially concerning the connection between the amino acid sequence and the biologically active confirmation; S MOORE & W H STEIN — for their contribution to the understanding of the connection between chemical structure and catalytic activity of the active centre of the ribonuclease molecule; (1973) E O FISCHER & G WILKINSON — for their pioneering work, performed independently, on the chemistry of the organometallic, so called sandwich compounds; (1974) P J FLORY — for his fundamental achievements, both theoretical and experimental, in the physical chemistry of macromolecules; (1975) J W CORNFORTH — for his work on the stereochemistry of enzyme-catalyzed reactions; V PRELOG — for his research into the stereochemistry of organic molecules and reactions; (1976) W N LIPSCOMB — for his studies on the structure of boranes, illuminating problems of chemical bonding; (1977) I PRIGOGINE — for his contributions to non-equilibrium thermodynamics, particularly the theory of dissipative structures; (1978) P MITCHELL — for his contribution to the understanding of biological energy transfer through the formulation of the chemiosmotic theory; (1979) H C BROWN & G WITTIG — for their development of the use of boron- and phosphorus-containing compounds, respectively into important reagents in organic synthesis; (1980) P BERG — for his fundamental studies of the biochemistry of nucleic acids, with particular regard to recombinant-DNA; W GILBERT and F SANGER — for their contributions concerning the determination of base sequences in nucleic acids.