48 Thaddeus L. Bolton and Eleonora T. Miller 



have slight validity until inurement has become thorough and 

 coordination is complete. 



Since the reagents must be fairly inured and the effects of 

 exercise must be studied under the most exacting conditions and 

 for long periods of time, the ergograph is quite unadapted to the 

 obtaining of exact statistics upon a large number of individuals. 

 Therefore a few records taken upon unpracticed subjects, both 

 before and after operations whose influences are thought to 

 affect muscular power, are without the slightest claims to trust- 

 worthiness. 



Influences which are supposed to affect the ergograph records 

 must be studied by the way they affect practice gain. 



Practice gain with the ergograph is due to changes in the 

 direction of inurement, coordination, rhythm, and endurance in 

 muscular power. 



Practice gain as shown by the ergograph is practically unlim- 

 ited. 



Fatigue is a necessary condition for practice gain. It is essen- 

 tial to growth. 



Practice gain means increased power to recuperate. 



Vicarious practice effect is chiefly in the direction of coordina- 

 tion and rhythm. 



BIBLIOGRAPHY 



The following references will give some of the most important contribu- 

 tions to the subject of the paper and closely related subjects. 

 AivLiN, Arthur 



Some Experimental Conclusions on Practice and Habit. Journal of 

 Pedagogy, vol. XIV, pp. 237-54. 

 Amberg, Emil 



Ueber den Einfluss von Arbeitspausen auf die geistiere Leistungsfaehig- 

 keit. Psychologische Arbeiten, Band 1, s. 300-77. 

 Anderson, Wiixiam S. 



Studies in the Effect of Physical Training. Am. Phys. Ed. Rev., vol. 

 IV, p. 265. 



Bair, J. H. 



Development of Voluntary Control. Psych. Rev., VIII, p. 474. 



The Practice Curve: A Study in the Formation of Habits. Psych. Rev. 



Monograph Suppl. No. 19. Nov. , 1902. 

 The Process of Learning. New York Teachers' Monographs, vol. VI, 

 p. 51. Dec, 1902. 



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