CONTENTS -- Introduction by Stephen Hawking -- Chapter One -- ON THE LAW OF DISTRIBUTION OF ENERGY IN THE NORMAL SPECTRUM by Max Planck -- ON A HEURISTIC VIEWPOINT CONCERNING THE PRODUCTION AND TRANSFORMATION OF LIGHT By Albert Einstein -- "THE ATOMIC THEORY OF MATTER" By Max Planck -- Chapter Two -- THE SCATTERING OF α AND β PARTICLES BY MATTER AND THE STRUCTURE OF THE ATOM by Ernest Rutherford -- ON THE CONSTITUTION OF ATOMS AND MOLECULES by Niels Bohr -- THE STRUCTURE OF THE ATOM by Niels Bohr -- Chapter Three -- EXCERPTS FROM: THE PHYSICAL PRINCIPALS OF THE QUANTUM THEORY by Werner Heisenberg -- THE DEVELOPMENT OF QUANTUM MECHANICS by Werner Heisenberg -- QUANTISATION AS A PROBLEM OF PROPER VALUES -- PARTS I - IV by Erwin Schrodinger -- Chapter Four -- THE QUANTUM THEORY OF THE ELECTRON by Paul A.M. Dirac -- THE CONNECTION BETWEEN SPIN AND STATISTICS by Wolfgang Pauli -- EXCLUSION PRINCIPLE AND QUANTUM MECHANICS by Wolfgang Pauli -- Chapter Five -- THE STATISTICAL INTERPRETATION OF QUANTUM MECHANICS by Max Born -- THE PRESENT SITUATION IN QUANTUM MECHANICS by Erwin Schrodinger -- CAN QUANTUM-MECHANICAL DESCRIPTION OF PHYSICAL REALITY BE CONSIDERED COMPLETE? by Albert Einstein, Boris Podolsky and Nathan Rosen -- CAN QUANTUM-MECHANICAL DESCRIPTION OF PHYSICAL REALITY BE CONSIDERED COMPLETE? by Niels Bohr -- A SUGGESTED INTERPRETATION OF THE QUANTUM THEORY IN TERMS OF "HIDDEN" VARIABLES by David Bohm -- A SUGGESTED INTERPRETATION OF THE QUANTUM THEORY IN TERMS OF "HIDDEN" VARIABLES II by David Bohm -- ON THE EINSTEIN PODOLSKY ROSEN PARADOX by John S. Bell -- Chapter Six -- THE QUANTUM THEORY OF THE EMISSION AND ABSORPTION OF RADIATION by Paul A.M. Dirac -- THE LAGRANGIAN IN QUANTUM MECHANICS by Paul A.M. Dirac -- ON QUANTUM ELECTRODYNAMICS by Paul A.M. Dirac, V.A. Flock and Boris Podolsky.

FOUNDATIONS OF THE NEW FIELD THEORY by Max Born and Leopold Infeld -- ELECTRON THEORY by J. Robert Oppenheimer -- Chapter Seven -- FINE STRUCTURE OF THE HYDROGEN ATOM BY A MICROWAVE METHOD by Willis E. Lamb, Jr. and Robert C. Rutherford -- THE ELECTROMAGNETIC SHIFT OF ENERGY LEVELS by Hans A. Bethe -- Chapter Eight -- ON A RELATIVISTICALLY INVARIANT FORMULATION OF THE QUANTUM THEORY OF WAVE FIELDS by Sin-Itiro Tomanaga -- SPACE-TIME APPROACH TO QUANTUM ELECTRODYNAMICS by Richard Feynman -- THE THEORY OF POSITRONS by Richard Feynman -- THE RADIATION THEORIES OF TOMONAGA, SCHWINGER AND FEYNMAN by Freeman Dyson -- Chapter Nine -- PROBLEMS OF ATOMIC DYNAMICS by Max Born -- EXCERPTS FROM THIRTY YEARS THAT SHOOK PHYSICS: THE STORY OF QUANTUM THEORY (CHAPTERS I AND IV) by George Gamow -- EXCERPTS FROM LECTURES ON QUANTUM MECHANICS by Paul A.M. Dirac -- Acknowledgments.