MANUAL OF NATURB STUDY. 163 



IX. The Special Senses. 



(a) The Sense of Sight. Light, refraction^ 

 the microscope. The eye as a special 

 organ for receiving impression of light. 

 Structure and function of the eye as 

 to its parts. Defective sight and its 

 remedy. Care of the eyes. 



(6) Sense of Hearing. Sound, properties of. 

 The ear as a special organ for receiving 

 impressions of sound. Structure and 

 function of the ear as to its parts. De- 

 fects of hearing. Care of the ear. 



(c) The Sense of Touch. Ideas received by 



touch. The skin papillae organs of 

 touch, where most numerous. Struct- 

 ure and function of papillae. Cultiva- 

 tion of touch. 



(d) The Sense of Taste. Its nature, value 



and abuse. Organs of taste. Struct- 

 ure of. Cultivation of taste. 



(e) The Sense of Smell. Nature of process, 



value of Organs of, structure of. 



X. Health and Disease; Poisons and Their Anti- 

 dotes. Emergencies. 



