8 BULLETIN" 38, TJ. S. DEPARTMENT OF AGRICULTURE. 
Kearney, T. H. Breeding new types of Egyptian cotton. U. S. Department of 
Agriculture, Bureau of Plant Industry, Bulletin 200, 1910. 
Describes in detail the Yuma variety and other types developed and the methods 
used in the breeding work. 
Cook, O. F. Cotton selection on the farm by the characters of the stalks, leaves, 
and bolls. U. S. Department of Agriculture, Bureau of Plant Industry, 
Circular 66, 1910. 
Points out methods by which growers may maintain the purity of their seed. 
Cook, O. F. Hindi cotton in Egypt. U. S. Department of Agriculture, Bureau 
of Plant Industry, Bulletin 210, 1911. 
Discusses the contamination in Egyptian fields due to the presence of " weed 
cotton," and conveys a warning to American growers of the necessity of safeguarding 
the purity of their stocks. 
McLachlan, A. The branching habits of Egyptian cotton. U. S. Department 
of Agriculture, Bureau of Plant Industry, Bulletin 249, 1912. 
Describes the character of the branches in this type of cotton and points out the 
relation of these characters to productiveness. 
Kearney, T. H. Fiber from different pickings of Egyptian cotton. U. S. De- 
partment of Agriculture, Bureau of Plant Industry, Circular 110, p. 37-39, 
1913. 
Shows that the fiber may differ considerably in the different pickings and that 
this should be taken into account in grading. Suggests that seed from the earliest 
and the latest picking may not be desirable for planting. 
Cook, O. F. Heredity and cotton breeding. U. S. Department of Agriculture, 
Bureau of Plant Industry, Bulletin 256, 1913. 
1 Shows how characters are coordinated and the application of this fact in cotton 
breeding. 
ADDITIONAL COPIES of this publication 
A may be procured from the Supebintend- 
ENT of Documents, Government Printing 
.Office, Washington, D. C. , at 5 cents per copy 
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