6. Rise and extension of the railway system ([298]-[300]).
7. Growth of American foreign trade ([445]-[449]).
IV. Rise of organized labor.
1. Early phases before the Civil War: local unions, city federations, and national unions in specific trades ([304]-[307]).
2. The National Trade Union, 1866-1872 ([574]-[575]).
3. The Knights of Labor ([575]-[576]).
4. The American Federation of Labor ([573]-[574]).
a. Policies of the Federation ([576]-[577]).