LIST OF ILLUSTRATIONS 



FIG. PAGE 



1. Diagram showing relative value of field crops in United 



States and in cotton-belt .... 5 



2. Diagram showing the total value of all crops and the rela- 



tive value of the leading crops for each state in the 

 cotton-belt . .... 7 



3. Stalk of Lone Star upland cotton, with (a) vegetative and 



(b) fruiting branches from the same node. (U. S. 

 Dept. Agr.) . . , 13 



4. Flower of upland cotton, from the side, showing the posi- 



tion of the small calyx-lobe opposite the smallest 

 bract (U. S. Dept. Agr.) . ,15 



5. Bracts of upland cotton inclosing bud, showing twisted 



' teeth (U. S. Dept. Agr.) 15 



6. Stamens and stigmas of Egyptian cotton. (U. S. Dept. 



Agr.) . . 16 



7. Cotton-producingareasof the world. (After Todd.) . 34 



8. Plant of the Jackson Limbless variety of cotton, repre- 



senting the Cluster group (U. S. Dept. Agr.) 41 



9. Plant of the Hawkins variety of cotton, representing the 



Semicluster group (U. S. Dept. Agr.) , . 42 



10. Plant of the Peterkin variety of cotton, representing the 



Peterkin group (U. S. Dept. Agr.) . 43 



11. Plant of the Shine variety of cotton, representing the Early 



group (U. S. Dept. Agr.) . 44 



12. Plant of the Truitt variety of cotton, representing the Big- 



boll group (U. S. Dept. Agr.) .... 45 



13. Plant of the AUen variety of cotton, representing the upland 



long-staple group (U. S. Dept. Agr.) . . 47 



14. Cotton seeds with fibers attached. (U. S. Dept. Agr.) . 57 

 ^15. Outfit used in crossing cotton; also buds showing the steps 



in emasculation and a boU three days after pollination 

 (Ga. Station) 65 



