• INTRODUCTION • I1 Interpretations or Interpretation? 12 The Fading of the Concept of Particle 53 An Ontology of \II-Waves 94 The Measurement Problem 135 Sources 18Typographic Conventions 18• JULY 1952 COLLOQUIUM • 191 Introduction 192 How It Came About 223 The Alleged Energy Balance-A Resonance Phenomenon 244 Removing Some Difficulties 265 Chemistry, Photochemistry, and the PhotoelectricEffect 286 (Individuality and Samenessl 317 Thermodynamics 36• TRANSFORMATION AND INTERPRETATIONIN QUANTUM MECHANICS (C. 1952) • 39Introductory Remark 391 The Wave Function; Linear Operators; Eigenfunctions and Eigenvalues 402 The Transformation to Another Frame 443 The Transformation of the Wave Function 464 The Inte:rpretation of the Wave Function 495 Illustrations 546 (Harmonic Oscillators) 63,7 (Interpreting the Wave Function) 708 (Laws and Changes with Time) 823 • NOTES FOR 1949 SEMINAR • 97The Problem of Matter in Quantum Mechanics 97The Nature of the Elementary Particles 99The Difficulties in Interpreting the Blur (Quantum Uncertainty) 1044 • NOTES FOR 1955 SEMINAR • I09Introduction 109On Measuring Velocities by the Police or Race-Course Method 110Introduction to Statistics 114Planck-Black-Body-Radiation (Without Discontinuity!) 1155 • FROM A LETTER TO ARTHUR S. EDDINGTON, MARCH 22ND 1940 • 1216 • WILLIAM JAMES LECTURES • 1231 First Lecture; Science, Philosophy and the Sensates 1232 Second Lecture: The Technique of Measurement 1313 Third Lecture: The Part of the Human Mind 141