CONTENTS OF THE FIRST VOLUME. 



CHAPTER PAOK 



I. THE CONSTITUTION OF NATURE ..... 3 



II. RADIATION . 28 



III. ON RADIANT HEAT IN RELATION TO THE COLOUR AND 



CHEMICAL CONSTITUTION OF BODIES ... 74 



IV. NEW CHEMICAL REACTIONS PRODUCED BY LIGHT . 96 



V. THE SKY 131 



VI. VOYAGE TO ALGERIA TO OBSERVE THE ECLIPSE . 142 



VIL 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 DIAMAONETIC FORCES . . 821 



XIV. PHYSICAL BASIS OF SOLAR CHEMISTRY . . . 329 



XV. ELEMENTARY MAGNETISM 843 



XVI. ON FORCE 809 



XVII. CONTRIBUTIONS TO MOLECULAR PHYSICS . . . 386 

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