8 CONTENTS. 



FORMAL OPTICS. 



PAGE 



CHAPTER I. PRIMARY INDUCTION OF OPTICS. RAYS OF 



LIGHT AND LAWS OF REFLECTION 53 



CHAPTER II. DISCOVERY OF THE LAW OF REFRACTION... 54 



CHAPTER III. DISCOVERY OF THE LAW OF DISPERSION BY 



REFRACTION 58 



CHAPTER IV. DISCOVERY OF ACHROMATISM 66 



CHAPTER V. DISCOVERY OF THE LAWS OF DOUBLE RE- 

 FRACTION 69 



CHAPTER VI. DISCOVERY OF THE LAWS OF POLARIZATION. 72 



CHAPTER VII. DISCOVERY OF THE LAWS OF THE COLORS 



OF THIN PLATES 76 





 



CHAPTER VIII. ATTEMPTS TO DISCOVER THE LAWS OF 



OTHER PHENOMENA 78 



CHAPTER IX. DISCOVERY OF THE LAWS OF PHENOMENA 



OF DlPOLARIZED LlGHT.. 80 



PHYSICAL OPTICS. 



CHAPTER X. PRELUDE TO THE EPOCH OF YOUNG AND 



FRESNEL 85 



CHAPTER XL EPOCH OF YOUNG AND FRESNEL. 



Serf. 1. Introduction 92 



Sect. 2. Explanation of the Periodical Colors of Thin Plates and Shadows 



by the Undulatory Theory 



Sect. 3. Explanation of Double Refraction by the Undulatory Theory 98 



Sect. 4. Explanation of Polarization by the Undulatory Theory 100 



Sect. 5. Explanation of Dipolavization by the Undulatory Theory 105 



