10. Wallace, D. D. — Southern Agriculture : Its Con- 



ditions and Needs, in Popular Science 

 Monthly, Vol. 6i (January, 1904), pp. 245- 

 261. 



11. Wiest, Edward. — The Butter Industry in the 



United States, in the Columbia University 

 Studies, Vol. 69, No. 2 (1916), pp. 235-488. 



12. Wright, C. W. — Wool-Grozcing and the Tariff, in 



Harvard Economic Studies, Vol. V (1910), 

 Chapters VIII, IX. 



13. Plantations in the South, in Thirteenth Census 



of the United States (1910), Vol. V, pp. 877- 

 889. 



14. Irrigation, in Thirteenth Census of the United 



States (1910), Vol. V, pp. 827-876. 



15. Report of the Industrial Commission (1910), 



Vol. 10, Agriculture and Agricultural Labor. 



16. Twelfth Census of the United States (1900). 



Volumes on " Population " and " Agriculture." 

 Consult Tables of Contents of these volumes. 



17. Thirteenth Census of the United States (1910). 



Volumes on " Population " and "Agriculture." 

 Consult Tables of Contents of these volumes. 



18. Yearbooks of the United States Department of 



Agriculture. 



19. Annual Reports of the United States Department 



of Agriculture. 



20. Agricultural Periodicals. 



21. The materials on recent phases of economic his- 



tory lack organization. The student of this 

 period will find the following aids of consid- 

 erable value: Writings in American History, 

 The Annual Library Index, Supplement to 

 Poole's Index, The Reader's Guide, The 

 United States Catalogue and The American 

 Catalogue. 



87 



