Adam Smith, Wealth of Nations, p. 2. "The greatest improvement in the productive powers of labor, and the greater part of the skill, dexterity, and judgment, with which it is anywhere directed, or applied, seem to have been the effects of the division of labor." Also p. 4.

H.K. Hathaway, The Value of "Non-Producers" in Manufacturing Plants. Machinery, Nov., 1906, p. 134.

Gillette and Dana, Cost Keeping and Management Engineering, p. 11.

Morris Llewellyn Cooke, Bulletin No. 5, Carnegie Foundation for the Advancement of Teaching, p. 15.

H.L. Gantt, Work, Wages and Profits, p. 120.

Hugo Münsterberg, American Problems, p. 34.

G.M. Stratton, Experimental Psychology and Its Bearing upon Culture, p. 37.

Ibid., p. 38.

For apparatus for psychological experiment see Stratton, p. 38, p. 171, p. 265.

H.L. Gantt, Work, Wages and Profits, p. 15.

Morris Llewellyn Cooke, Bulletin No. 5, The Carnegie Foundation for the Advancement of Teaching, p. 7.

F.W. Taylor, Shop Management, para. 29. Harper Ed., p. 25.

H.L. Gantt, Paper No. 928, A.S.M.E., para. 6.

F.B. Gilbreth, Cost Reducing System.

F.W. Taylor, Shop Management, para. 61. Harper Ed., p. 33.