7. The grain trade of the U.S. [Monthly Summary, Jan., 1900.]
8. Grain elevators and warehouses. [Rep. Ind. Comm., 1900, 10: cccxvii-cccxxxix; Monthly Summary, Oct., 1903.]
9. The flour milling industry. [Edgar, Story, chaps. 10, 11; Depew, chap. 39 by Pillsbury; U.S. Census.]
10. What are the various products obtained from maize? [Encyc.; commercial geographies.]
11. The packing industry. [Depew, chap. 55 by Armour; Census, 1900, 9: 385-429, 1910, 10: 333-353.]
12. The dairy industry. [Census, 1900, 5: clxv-clxxxvi; Rep. Ind. Comm., 1900, 6: 268-296.]
13. Economic effect of the Civil War on the South [Cambridge Mod. hist., vol. 7, chap. 19 by Schwab; Rhodes, Hist. U. S.]
14. The cultivation of cotton since 1860. [Hammond, pp. 120-228.]
15. Recent development of the cotton trade. [Hammond, pp. 324-350; U. S. Mo. Summary, March, 1900; Depew, chap. 34 by Edmonds.]
16. By-products of the cotton industry. [Depew, chap. 67 by Chaney; Census, 1900, 9: 585-594.]