This collection of lectures offers a unique historical perspective of scientific and cultural developments in each of the respective fields, and would appeal to a wide range of readers. In addition to the lectures and acceptance speeches, they provide an opportunity to read the Nobel Laureates' personal accounts of the many years of preparation and effort that led to their acknowledged achievements. Apart from serving as an invaluable source of information for specialists and researchers, the lectures would also be of interest to those with less specialized knowledge of the particular fields. As such, they would make an excellent source of reference for individuals, libraries, and educational institutions.