CONTENTS. 



INTRODUCTION 



CHAPTER I. 

 THE EARTH'S CLOTHING. 



L The First Observations. II. The Bones of the World. 



III. Surface Indications ............ 1-12 



CHAPTER II. 

 THE HISTORY OF THE GROUND. 



IV. The Soil-makers. V. Weathering. VI. The Soil Movers 

 and Sorters. VIL Plants and Living Creatures as Soil- 

 makers .................. 13-35 



CHAPTER III. 



THE SOIL THE HOME OF THE PLANTS. 

 VIIL Organic and Inorganic. IX. Experiments with Soils . 36-47 



CHAPTER IV. 

 KINDS OF SOILS. 



X. Sand and Clay. XI. Experiments with Sand and Clay. 



XIL Sand Soils and Clay Soils .......... 48-60 



iii 



