xii TABLE OF CONTENTS. 



Page 



Chap. VIII. Upholsterers and Carpenters 186 



IX. Cloth-Cutters and Lead-Eaters 198 



X. Hydraulic Engineers and Masons 201 



/ BOOK IV. 



RAVAGERS OF FORESTS 208 



BOOK V. 



PROTECTORS OF AGRICULTURE 219 



BOOK VI. 



THE ARCHITECTURE OF BIRDS 226 



Chap. I. Giants and Pigmies 233 



II. The Instinct of Chemistry. Mountain Builders and Gleaners 240 



III. Work and the Family 246 



IV. Idlers and Assassins 255 



V. Architecture intended for Enjoyment 266 



VI. Naval Architecture 270 



VII. Miners and Masons 277 



VIII. Weavers 289 



BOOK VII. 



THE MIGRATIONS OF ANIMALS 295 



Chap. I. Migrations of Mammals . . . . ... 300 



II. Migrations of Birds 304 



II T. Migrations of Reptiles and Fishes. Showers of Frogs . . 320 



IV. Migrations of Insects . . ..... 324 



THE VEGETABLE KINGDOM. 



INTRODUCTION . .... 337 



BOOK I. 



THE ANATOMY OF PLANTS 343 



Chap. I.- The Root 347 



II. The Stem 349 



III. The Leaf ..355 



IV. The Flower . . 359 



