346 QUESTIONS. 



CHAPTER IV. 



OF THE SENSES. 



I. Of Smelling. 



(P. 117.) What general remark is made upon the senses ? Describe 

 the sense of smell. What is its chief practical use, both to men and 

 animals ? Why are the organs of tasting and smelling so near each 

 other? How does the sense of smelling vary in different animals? 

 What is said of the sense of smell in animals that do not breathe air ? 



in the in vertebral animals? 



II. Of Tasting. 



(P. 120.) Describe the sense of tasting. How does the sense of 

 tasting vary in different persons ? What is said of this sense in her- 

 bivorous animals ? of the universality of this sense ? 



HI. Of Hearing. 



(P. 122.) Describe the sense of hearing. What is said of this sense 

 in infancy ? What proof that air is the medium by which sounds are 

 propagated ? What is said of the undulations of air ? of the velocity 

 of sound ? of the modifications of sound ? What is said of the pleas- 

 ures of this sense? How does Buffon explain the absence of an " ear 

 for music " ? What would have been the condition of human society 

 without the ear in man ? What is said of natural language ? Quote 

 the sentiment of Dr. Reid, on this subject. 



IV. Of Touch. 



(P. 125.) What is the difference between feeling and touch? What 

 general remark is made in regard to the nerves of sensation ? Describe 

 the nervous papilla. How are they affected in acts of sensation ? 

 Upon what does pleasure or pain from the sense of touch depend r 

 Illustrate this by examples. What are the offices of the sense of touch > 



its susceptibility of cultivation? 



V. Of Seeing. 



(P. 128.) How does the author set forth the superiority of the sense 

 of sight over the other senses? Give an account of the structure of 

 the eye, naming the coats, the iris, the pupil, humors, &c. 



