THE PRODUCTION OF MOVEMENT. 



377 



selves. They sliow the effects of light upon the breathing 

 of two of his hysteric patients.* 



Fig. &4.— Respiratorj' curve of L: a, with yellow light; 6, with green light; c, with red 

 light. The red has the strongest effect. 



On the sioeat-glands, similar consequences of sensorial 

 stimuli are observed. Tarchanoff, testing the condition of 

 the sweat-glands by the power of the skin to start a gal- 



* Revue Phil., xxrv. pp. 566-7. — For further informatioa about the rela- 

 tions between the brain and respiration, see Danilewsky's Essay in the Bio- 

 logisches Centralblatt, ii. 690. 



