Method of Regulation in Behavior and in Other Fields. 493 



When any of the processes are blocked the energy overflows in 

 other directions, producing varied changes in chemical processes, 

 movement and growth. Some of the conditions reached through 

 these changes relieve the interference that was the cause of the 

 changes. Thereupon the changes cease, since their cause has 

 disappeared; the relieving condition is therefore maintained. 

 After repetition of this course of events, the change which leads 

 to relief is reached more directly, as a result of the law of the readier 

 resolution of physiological states after repetition. Thus are pro- 

 duced finally the stereotyped and under certain conditions non- 

 regulatory changes sometimes resulting from stimulation. 



This method of regulation is clearly seen in behavior, where its 

 operation is, in the later stages, what is called intelligence. Its 

 application to chemical and form regulation is at present hypo- 

 thetical, but appears probable. 



LITERATURE CITED. 



Baldwin, J. Mark, '97. — Mental Development in the Child and in the Race. 



Methods and Processes. Second ed., 496 pages. New York. 

 '02. — Development and Evolution. 395 pages. New York. 

 BoHN, G., '05. — Attractions et Oscillations des animaux marins sous I'influence 



de la lumiere. Institut General Psychologique, Memoires, 



i, no pages. 

 Engelmann, Th. W., '82.— Bacterium photometricum. Ein Beitrag zur 



vergleichenden Physiologic des Licht- und Farbensinnes. Arch. 



f. d. ges. Physiol., Bd. xxx, S. 95-124. 

 Hodge, C. F., and Aikins, H. A., '95.— The Daily Life of a Protozoan: a Study 



in Comparative Psycho-physiology. Amer. Journ. Psychol., 



vol. vi, pp. 524-533. 

 Holmes, S. J., '04.— The Problem of Form Regulation. Arch. f. Entw.-mech., 



Bd. xviii, S. 265-305. 

 Jennings, H. S., '02.— Studies on Reactions to Stimuli in Unicellular Organisms. 



IX. On the Behavior of Fixed Infusoria (Stentor and Vorticella), 



with Special Reference to the Modifiability of Protozoan Reactions. 



Amer. Journ. Physiol., vol. viii, pp. 23-60. 

 '04. — Physiological States as Determining Factors in the Behavior of 



Lower Organisms. Contributions to the Study of the Behavior 



of the Lower Organisms, fifth paper, pp. 109-127. Carnegie 



Institution of Washington, Publ. 16. 



