1. F.B. Gilbreth, _Bricklaying System_, para. 541-545. 2. H.K. Hathaway, _Prerequisites to the Introduction of Scientific Management, Engineering Magazine,_ April, 1911, p. 141. 3. H.L. Gantt, paper 928, A.S.M.E., p. 372. 4. H.L. Gantt, _Work, Wages and Profits_, p. 116. 5. H.L. Gantt, paper 928, A.S.M.E., p. 342. 6. F.W. Taylor, _Shop Management_, para. 289, Harper Ed., pp. 127-128. 7. H.K. Hathaway, _Engineering Magazine_, April, 1911, p. 144. 8. W.D. Ennis, _An Experiment in Motion Study, Industrial Engineering_, June, 1911, p. 462. 9. C.S. Myers, M.D., _An Introduction to Experimental Psychology_, chap. V, p. 73. 10. G. M. Stratton, _Experimental Psychology and Culture_, p. 125. 11. William James, _Psychology, Briefer Course_, p. 171. 12. F.B. Gilbreth, _Bricklaying System_, chap. I, _Training of Apprentices_. 13. _McClure's Magazine_, May, 1911, Dec, 1911, Jan., 1912. 14. As a woodman's keenness of hearing. 15. M.W. Calkins, _A First Book in Psychology_, chap. III. 16. Stratton, _Experimental Psychology and Culture_, chap. VII. 17. Compare with an actor's learning a part. 18. As proved by experimenting with a six-year-old child. 19. Imbert, _Etudes experimentales de travail professionnel ouvrier, Sur la fatigue engendree par les mouvements rapides_. 20. William James, _Psychology, Briefer Course_, p. 134. 21. _Ibid._, p. 138. William James, Psychology, Advanced Course. p. 112. 22. F.B. Gilbreth, _Bricklaying System_, p. 142. 23. Stratton, _Experimental Psychology and Culture_, p. 214. 24. Prof. Bain, quoted In William James' _Psychology, Briefer Course_, pp. 145-147. 25. F.B. Gilbreth, _Bricklaying System_, para. 18-19. 26. M.W. Calkins, _A First Book in Psychology_, p. 354. 27. James Sully, _The Teacher's Handbook of Psychology_, p. 119. 28. Stratton, _Experimental Psychology and Culture_, p. 99. 29. Stratton, _Experimental Psychology and Culture_ p. 240. 30. Attracting the attention is largely a matter of appealing to what is known to interest, for example, to a known ambition. 31. M.S. Read, _An Introductory Psychology_, p. 183. 32. F.B. Gilbreth, _Motion Study_, p. 89. 33. _Ibid._, _Bricklaying System_, para. 555-557. 34. F.B. Gilbreth, _Bricklaying System_, p. 150. 35. M.S. Read, _An Introductory Psychology_, pp. 179-194. 36. G.M. Stratton, _Experimental Psychology and Culture_, p. 42. 37. M.S. Read, _An Introductory Psychology_, p. 208. 38. William James, _Psychology, Advanced Course_, Vol. I, p. 667. 39. M.S. Read, _An Introductory Psychology_, pp. 212-213. William James, _Psychology, Briefer Course_, p. 302. 40. M.W. Calkins, _A First Book in Psychology_, p. 25. 41. James Sully, _The Teacher's Handbook of Psychology_, p. 290. 42. William James, _Psychology, Briefer Course_, p. 150. 43. W.D. Scott, _Influencing Men in Business_, chap. II. 44. _Ibid._, chap. III. 45. W.D. Scott, _The Theory of Advertising_, p. 71. 46. W.D. Scott, _Increasing Human Efficiency in Business_, p. 41. 47.