I Introduction: Eugene Wigner and Nuclear Energy -- Introduction: Eugene Wigner and Nuclear Energy -- II Memoir of the Uranium Project -- Memoir of the Uranium Project -- III Acrticles, Reports, and Memoranda on Nuclear Energy -- The Pre-Chicago Days Annotation by Alvin M. Weinberg -- 1. For Discussion of the Homogeneous and Lattice Arrangements for Power Plants -- 2. Approximation for Radius of Sphere Sufficient for Chain Reaction in Light Isotype -- 3. Diffusion of Slow Neutrons on Absorbing Materials -- 4. Solution of Boltzmann's Equation for Monoegenergetic Neutrons in an Infinite Homogeneous Medium -- 5. Review of the Measurements of the Resonance Absorption of Neutrons by Uranium in Bulk -- 6. Resonance Absoprtion of Neutrons by Spheres -- 7. Effect of Geometry on Resonance Absorption of Neutrons by Uranium -- 8. Effect of Temperature on Total Resonance Absorption of Neutrons by Spheres of Uranium Oxide -- 9. Absorption of Thermal Neutrons in Uranium -- 10. Density of Neutrons in Carbon Block with and Without Absorbing Material -- Reactor Engineering at Chicago, 1942-1945, and at Clinton, 1946-1947 Annotation by Alvin M. Weinberg -- Plutonium-Producing Reactors -- 11. Report of the Committee for the Examination of the Moore-Leverett Design of a He-Cooled Plant -- 12. General Considerations Concerning the Lattice Structure -- 13. Survey of the Power Plant Problem -- 14. A Plant with Water Cooling -- 15. On a Plant with Water Cooling -- 16. Preliminary Process Design of Liquid Cooled Power Plant Producing 5 x 105 kW -- 17. Memorandum from P-9 Committee -- Breeders -- 18. Breeders and Converters: Minutes of Lecture on April 7, 1945 -- 19. Preliminary Calculations on a Breeder with Circulating Uranium -- 20. New Ideas for Nuclear Reactors -- 21. Project Hope: A Chemical Reprocessing Plant for a Nuclear Power Economy -- Reactor Shielding -- 22. Protection Against Radiations -- 23. Penetration of Fission Neutrons Through Water -- 24. On the Available Information Concerning the Interaction of Neutrons with Matter -- Fission Products -- 25. The Rate of Decay of Fission Products -- Wigner Effect -- 26. The Effects of Radiation on Solids -- Reactor Theory Annotation by Alvin M. Weinberg -- 27. Theoretical Physics in the Metallurgical Laboratory of Chicago -- 28. Mathematical Problems of Nuclear Reactor Theory -- Microscopic Reactor Theory -- 29. Resonance Escape Probability in Lattices -- 30. On the Utilization of Thermal Neutrons -- Temperature Coefficients -- 31. Effect of the Temperature of the Moderator on the Velocity Distribution of Neutrons with Numerical Calculations for H as Moderator -- Macroscopic Reactor Theory -- 32. Approximate Boundary Conditions for Diffusion Equation at Inteface Between Two Media -- 33. On the Boundary Condition Between Two Multiplying Media -- 34. On Variations of the Power Output in a Running Pile -- 35. Use of the Pile Oscillator for the Measurement of Pile Constants -- 36. Effect of Small Perturbations on Pile Period -- 37. Efficiency of Control Rods Which Absorb Only Thermal Neutrons -- General Articles on Nuclear Energy and Energy Policy Annotation by Alvin M. Weinberg -- 38. Atomic Energy -- 39. Impact of the Developments in Atomic Energy on the Sciences -- 40. Ziele und Probleme von Reaktoren -- 41. Longer Range View of Nuclear Energy -- 42. Our Needs for Energy and Ways to Satisfy Them -- Book on Reactor Theory and Nuclear Physics -- IV The Wigner Patents -- The Wigner Patents.