CONTENTS. Vn 



CHAPTER XIII. 



FAQK 



Meteoeologt 266 



Section I. — Phenomena axd Production of Dew 270 



" II. — Clouds, Rain, Ssow, and Hail. 273 



" III. — Winds 281 



" IV. — Meteoric Phenomena 288 



" Y. — Popular Opinions concerning the Weather 291 



CHAPTER XIV. 



Light 292 



Section I. — Reflection of Light 301 



" II. — Refraction of Light 312 



" IIL — The An.altsis of Light 325 



« IV. — The Eye, and the Phenomena of Vision. 347 



" V. — Optical Instrujients 360 



CHAPTER XV. 



Electricity 369 



Section L — Atmospheric Electricitt 391 



CHAPTER XVI. 

 Galvantsm 398 



CHAPTER XVII. 

 Theemo-Electricity 416 



CHAPTER XVIII. 

 Magnetism 417 



CHAPTER XIX. 

 Electbo-Magnetism 429 



