CONTENTS 



OF 



THE FIRST VOLUME 



CHAPTER PAGB 



I. THE CONSTITUTION OF NATURE , . . 3 



II. RADIATION . . . . . 28 



m. ON EADIANT HEAT IN RELATION TO THE COLOUR 



AND CHEMICAL CONSTITUTION OP BODIES . 74 



IV. NEW CHEMICAL REACTIONS PRODUCED BY LIGHT . 96 



V. THE SKY . . . . . . .131 



VI. VOYAGE TO ALGERIA TO OBSERVE THE ECLIPSE . 142 



VII. NIAGARA . . . . . . 175 



VIII. THE PARALLEL ROADS OF GLEN ROY . . . 205 



IX. ALPINE SCULPTURE . . 229 



X. RECENT EXPERIMENTS ON FOG-SIGNALS . 253 



XI. ON THE STUDY OF PHYSICS . . . .281 



XII. ON CRYSTALLINE AND SLATY CLEAVAGE . . . 304 



XIII. ON PARAMAGNETIC AND DIAMAGNETIC FORCES . 321 



XIV. PHYSICAL BASIS OF SOLAR CHEMISTRY . . . 329 

 XV. ELEMENTARY MAGNETISM . . 343 



XVI. ON FOUCE . . . . . . . 369 



XVII. CONTRIBUTIONS TO MOLECULAR PHYSICS . . 386 



