Renowned physicist and mathematician Freeman Dyson is famous for his work in quantum mechanics, nuclear weapons policy and bold visions for the future of humanity. This edition has been printed on the 60th anniversary of the Cornell lectures, and includes a foreword by science historian David Kaiser, as well as notes from Dyson's lectures at the Les Houches Summer School of Theoretical Physics in 1954. Reviews of the First Edition "... one can profit significantly from the insight into the physics beneath the apparatus, and the extensive and detailed treatment of some problems... Mathematical Reviews.