CONTENTS. 



CHAPTER I. 



Geology of soil, --------- 5 



CHAPTER II. 



Chemical constitution of Rocks and Soil, - - 22 



CHAPTER III. 



Properties and chemical action of the elements 

 of Soil, 36 



CHAPTER IV. 



Of the organic constituents of Soil, - - - - 52 



CHAPTER V. 



Of the mutual action of the organic and inor- 

 ganic elements of Soil, ------ 86 



CHAPTER VI. 



Manure, 123- 



CHAPTER VII. 



Artificial Manure and Irrigation, - - - - 177 



CHAPTER VIII. 



Physical properties of Soil, ----- 217 



