CONTENTS OF THE SECOND VOLUME. ix 



PAGE 



CHAPTER III. DISCOVERY OF THE LAW OF DISPERSION 



BY REFRACTION . . . 382 



CHAPTER IV. DISCOVERY OF ACHROMATISM . . . 396 



CHAPTER V. DISCOVERY OF THE LAWS OF DOUBLE RE- 

 FRACTION .... 400 



CHAPTER VI. DISCOVERY OF THE LAWS OF POLARIZATION 406 



CHAPTER VII. DISCOVERY OF THE LAWS OF THE COLOURS 



OF THIN PLATES . . . 413 



CHAPTER VIII. ATTEMPTS TO DISCOVER THE LAWS OF 



OTHER PHENOMENA . . . 417 



CHAPTER IX. DISCOVERY OF THE LAWS OF PHENOMENA 



OF DlPOLARIZED LlGHT . . 420 



PHYSICAL OPTICS. 



CHAPTER X. PRELUDE TO THE EPOCH OF YOUNG AND 



FRESNEL .... 426 



CHAPTER XI. EPOCH OF YquNG AND FRESNEL. 



Sect. 1. Introduction ...... 438 



Sect. 2. Explanation of the Periodical Colours of Thin 



Plates and Shadows by the TJndulatory Theory 440 

 Sect. 3. Explanation of Double Refraction by the Undu- 



latory Theory 449 



Sect. 4. Explanation of Polarization by the Undulatory 



Theory 451 



Sect. 5. Explanation of Dipolarization by the Undulatory 



Theory . . .... 461 



CHAPTER XII. SEQUEL TO THE EPOCH OF YOUNG AND 



FRESNEL. RECEPTION OF THE UNDULATORY THEORY 467 



CHAPTER XIII. CONFIRMATION AND EXTENSION OF THE 



UNDULATORY THEORY . . . 480 



1 . Double Refraction of Compressed Glass . . . 481 



2. Circular Polarization . . 482 



