CONTENTS. 



CHAPTER I. 



™ ^ ■ PAGE 



The Plant 1 



CHAPTER II. 



Cultivation .. 7 



CHAPTER III. 

 Cubing 67 



CHAPTER IV. 



Production AND Commerce 137 



CHAPTER V. 



Preparation and Use 231 



CHAPTER VI. 



Nature and Properties 253 



CHAPTER VIL 



Adulterations and Substitutes 267 



