[4]. E. C. Semple, Influences of Geographic Environment (New York, 1911), p. 354.

[5]. V. S. Clark, History of Manufactures in the U. S., 1607-1860 (Carnegie Institution, Washington, 1916), pp. 88 ff.

[6]. Report on the Water-Power of the U. S.; Census Report, 1885.

[7]. N. S. Shaler, United States, vol. 1, p. 54.

[8]. E. Huntington, Civilization and Climate (Yale University Press, 1915), p. 22.

[9]. Dalby Thomas, An historical account of the rise and growth of the W. I. Collonies and of the great advantages they are to England in respect to Trade (London, 1690), pp. 14, 21 f.

[10]. J. C. Ballagh, “The Land System in the South,” in American Historical Association Report, 1897, p. 109.

[11]. H. A. Pressey, Water-Powers of the State of Maine; U. S. Geological Survey, 1902, p. 15.

[12]. J. D. Whitney, The United States (Boston, 1889), p. 176.

[13]. E. C. Semple, American History and its Geographic Conditions (Boston, 1903), p. 122.