x lii CONTENTS. 



CHAPTER XXIV. 



EMPIRICAL KNOWLEDGE, EXPLANATION AND PREDICTION. 



SECTION 



PACK 



^Empirical Knowledge, Explanation and Prediction ..... 525 



2. Empirical Knowledge 526 



3. Accidental Discovery ** 



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 



CHAPTER XXV. 



ACCOPvDANCE OF QUANTITATIVE THEORIES. 



1. Accordance of Quantitative Theories 551 



2. Empirical Measurements 552 



8. Quantities indicated by Theory, but Empirically Measured . .553 



4. Explained Results of Measurement 554 



5. Quantities determined by Theory and verified by Measurement 5f>5 



6. Quantities determined by Theory and not verified 556 



7. Discordance of Theory and Experiment . 558 



8. Accordance of Measurements of Astronomical Distances . . 560 



9. Selection of the best Mode of Measuremeiit 563 



10. Agreement of Distinct Modes of Measurement 564 



11. Residual Phenomena . . 569 



CHAPTER XXVI. 



CHARACTER OF THE EXPERIMENTALIST. 



1. Character of the Experimentalist 574 



2. Error of the Baconian Method 676 



3. Freedom of Theorising 527 



4. The Newtonian Method, the True Organum 681 



5. Candour and Courage of the Philosophic Mind 586 



6. The Philosophic Character of Faraday 687 



7. Reservation of Judgment 592 



