318 PHYSIOLOGY. 



What does the whole vocal apparatus comprise ? What is essential 

 to the production of voice ? What effect has cutting the nerves which 

 go to the larynx ? What part of the larynx can be removed without 

 effecting the voice ? What are chiefly concerned in the production of 





voice ? Is the larynx a wind or stringed instrument ? What does the 

 strength of the voice depend on ? What is a change of voice owing 

 to ? What is said of the tone of the voice ? How many muscles are con- 

 cerned ? How many combinations can they produce ? How are acute 

 sounds produced ? How grave ones ? What is ventriloquism ? What 

 is natural voice ? What acquired ? Why are deaf children dumb ? 

 Why are idiots ? What is whistling ? whispering ? sighing, &c.1 

 What is said of singing ? 



