1. Congressional Record, 60th Cong., 1st sess., pp. 6163, 6164.
2. Congressional Record, 47th Cong., 1st sess., p. 5698.
3. Thomas J. R. , Congressional Record, 47th Cong., 2nd sess., pp. 1416–17.
4. Historical Statistics of the United States, Colonial Times to 1970 (Washington, D.C., 1975), part 2, chap. U; Department of Commerce and Labor, Bureau of Statistics, Analysis of the Foreign Commerce of the United States (Washington, D.C., 1906); and Exports of Manufactures from the United States and Their Distribution by Articles and Countries, 1800 to 1906 (Washington, D.C., 1907).