7. Railroad rate discrimination. W. Z. Ripley, Railroads, Rates and Regulation, pp. 195-209.
8. The work of the Interstate Commerce Commission. P. S. Reinsch, Readings on American Federal Government, pp. 517-527.
9. The Sherman Act and the Northern Securities Case. James T. Young, The New American Government and Its Work, pp. 141-164.
10. Our foreign trade today. J. H. Hammond and J. W. Jenks, Great American Issues, pp. 195-209.
11. The effects of the tariff on trade. F. W. Taussig, Some Aspects of the Tariff, pp. 3-49; J. H. Hammond and J. W. Jenks, Great American Issues, pp. 174-194.
12. Our river and lake commerce. G. S. Callender, Economic History of the United States, pp. 313-326.
13. International trade. H. R. Burch, American Economic Life, pp. 372-384.
14. The Panama Canal. F. A. Ogg, National Progress, pp. 266-277; P. L. Haworth, The United States in Our Own Times, pp. 300-309; F. J. Haskin, American Government, pp. 209-220.
15. The Shipping Board and Emergency Fleet Corporation. W. F. Willoughby, Government Organization in War Time and After, pp. 121-165.
16. American commerce during the World War. F. A. Cleveland and Joseph Schafer, Democracy in Reconstruction, pp. 397-419.