52 OF VITAL MOTION. 



CHAPTER III. 



B. OF VITAL MOVEMENTS SUCH AS ARE SEEN IN 

 THE IRRITABLE TUMOURS OF TEE SENSITIVE 

 PLANT, IN THE COATS OF THE ALIMENTARY 

 CANAL, AND IN VOLUNTARY MUSCLES. 



These phenomena are arranged in two sections, 

 according as they belong to the animal or vegetable 

 kingdom of nature; and this division furnishes the 

 primary heads of the present chapter. 



Section I. 

 OF movements such as are seen in the irritable 



TUMOURS OF THE SENSITIVE PLANT. 



1. Of extra-organic force as the agent in these 

 movements. 



Like all other phenomena of plant-life, these move- 

 ments point rather to extrinsic than to inherent agents, 

 when thev are examined in relation to their efficient 



