MANUAL OF NATURE 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. 
(d) 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. 
