XVi CONTENTS 



CHAPTER XX 



PAGES 



COTTON THE CULTIVATION OF THE AMERICAN UPLAND GROUP 341-360 

 Laboratory Exercises, 360 ; Literature, 360. 



CHAPTER XXI 



COTTON HARVESTING AND MARKETING .... 361-376 

 Laboratory Exercises, 376 ; Literature, 376. 



CHAPTER XXII 



COTTON HISTORY AND STATISTICS , 377-387 



Laboratory Exercises, 387 ; Literature, 387. 



CHAPTER XXIII 

 COTTON INSECT ENEMIES ....... 388-410 



Cotton Boll-worm, 388 ; Mexican Cotton Boll-weevil, 392 ; 

 Insects of Minor Importance, 407 ; Laboratory Exercises, 

 410 ; Literature, 410. 



CHAPTER XXIV 



COTTON FUNGOUS AND OTHER DISEASES .... 411-420 

 Laboratory Exercises, 420 ; Literature, 420. 



CHAPTER XXV 



\ HEMP CannaUs sativa .' i . . . . . 422-424 

 Laboratory Exercises, 424 ; Literature, 424. 



CHAPTER XXVI 

 SWEET-POTATO Ipomcea batatas ... . . . 425-456 



Composition and Uses, 428 ; Varieties, 431 ; Soils, Fer- 

 tilizers, and Rotation, 434 ; Cultural Methods, 438 ; Har- 

 vesting and Storing Sweet-potatoes, 447 ; Enemies, 452 ; 

 Laboratory Exercises, 455 ; Literature, 455. 



