Originally published in 1963, The Concept of the Positron forms a detailed analysis of quantum theory.

Acknowledgements; Introduction; 1. Light; 2. Explaining and predicting; 3. Picturing; 4. Correspondence and uncertainty; 5. Interpreting; 6. Some cautions; 7. Uncertainty again; 8. Equivalence?; 9. The positron; Appendices; Index.