CONTENTS. IX 



CHAPTER XVI. 



PAGE 



RULES . . . . '-'." \ . . . ; . 193 



CHAPTER XVH. 



POSTAL AND IMPOST REGULATIONS . . . . '.[ ' . . . 215 



CHAPTER XVIII. 

 THE WEATHER . . 220 



CHAPTER XIX. 



LITERATURE . ; .. . 229 



CHAPTER XX. 



NAMES, HISTORIES, AND CLASSIFICATION . ... . 241 



CHAPTER XXI. 



ELEMENTS, SYMBOLS, AND ANALYSES . 'V . . 259 



CHAPTER XXII. 

 GLOSSARY . . . . . . . * ^7- . 277 



INDEX . . . . 293 



