17. Recent history of the Virginia tobacco industry. [B. W. Arnold, History, Baltimore, 1897, $. 50.]
18. Recent development of the American iron industry. [Depew, chap. 46 by Huston; Crowell in International Monthly, 1901, 4: 211-250; Census, 1900, 7: cxlix, 10: 1-77; Monthly Summary, Aug., 1900.]
19. The steel industry. [Hatfield, Lectures, 131 ff.; Thurston in Century Magazine, 1900-1901, 61: 562-568.]
20. The mining of iron ore. [Fawcett in Century Magazine, 1900-1901, 61: 712-725; Census, Mines, 1902, pp. 393-431.]
21. The transportation of iron. [Fawcett in Century Magazine, 1900-1901, 61: 851-863.]
22. Write a report on one of the following topics, using volumes of the U. S. Census, Manufactures, Reports for principal industries.
(a) Manufacture of machine tools.
(b) Sewing machines.
(c) Typewriters.
(d) Watches.