Xll LIST OF ILLUSTRATIONS 



FACING PAGE 



Cultivating Cotton with a Spring Tooth Cultivator 48 

 (Farm Demonstration Work, U. S. Department of 

 Agriculture) 



Cultivating Cotton with a Two-horse Cultivator . . 48 

 (Farm Demonstration Work, U. S. Department 

 of Agriculture) 



Young Cotton Plants 49 



(Fiber Investigations, B. P. I., U. S. Department 

 of Agriculture) 



Cotton Bolls 82 



(Fiber Investigations, B. P. I., U. S. Department 

 of Agriculture) 



Open Bolls of Cotton 83 



(Fiber Investigations, B. P. L, U. 5. Department of 

 Agriculture) 



Varieties of Cotton: Sea Island, Rio Grande, Upland 



Long-staple, Upland 88 



(Fiber Investigations, B. P. /., U. S. Department of 

 Agriculture) 



Varieties of Cotton: Bill Boll Group, King-like or 

 Early Group, Cluster Group, Semi-cluster Group . 89 

 (Fiber Investigations, B. P. I., U. S. Department 

 of Agriculture) 



American Upland Cotton 92 



(Fiber Investigations, B. P. I., U, S. Department 

 of Agriculture) 



Cotton Boll with Anthracnose 93 



(Office of Plant Pathology, B. P. /., U. 5. Depart- 

 ment of Agriculture) 



Root-knot on Cotton Plant 93 



(Office of Plant Pathology, B. P. L, U. S. Department 

 of Agriculture) 



