CONTENTS. 



CHAPTER I. PAQR 



The History of Irrigation i 



CHAPTER II. 

 The Advantages of Irrigation 13 



CHAPTER III. 

 The Relation of Soils to Irrigation 22 



CHAPTER IV. 

 The Treatment of Alkali 36 



CHAPTER V. 

 Water-supply 47 



CHAPTER VI. 

 Canal Construction 57 



CHAPTER VII. 

 Reservoirs and Ponds 84 



CHAPTER VIII. 

 Pipes for Irrigation Purposes 109 



CHAPTER IX. 

 Flumes and Their Structure 125 



CHAPTER X. 

 Duty and Measurement of Water ..... 140 



CHAPTER XI. 

 Methods of Applying Water 166 



CHAPTER XII. 



Irrigation of Field Crops 206 



ix 



