CHAPTER XXIV.

EMPIRICAL KNOWLEDGE, EXPLANATION AND PREDICTION.

1. Empirical Knowledge, Explanation and Prediction 525

2. Empirical Knowledge 526

3. Accidental Discovery 529

4. Empirical Observations subsequently Explained 532

5. Overlooked Results of Theory 534

6. Predicted Discoveries 536

7. Predictions in the Science of Light 538

8. Predictions from the Theory of Undulations 540

9. Prediction in other Sciences 542

10. Prediction by Inversion of Cause and Effect 545

11. Facts known only by Theory 547