HELPS IN LESSON PREPARATION 339 



CHAPTER XXIV 



1. Tell how good hearing contributes toward our use- 

 fulness and pleasure. 2. Mention the three divisions of 

 the ear. 3. What is the auricle? The auditory canal? 



4. What are the earwax glands, and what is their use? 



5. Why should we not try to dig or swab out the earwax? 



6. Describe the drumhead. 7. What is the Eustachian 

 tube? 8. Tell how sound impressions get to the brain, 

 page 265. 9. What is said about impacted earwax, 

 pages 265 and 266? 10. State how a foreign body may 

 be removed from the ear. How should it not be removed, 

 and why? 11. Tell how the drumhead is sometimes 

 punctured. 12. Explain why picking the ear with a pen- 

 cil or any pointed instrument is dangerous. 13. Ex- 

 plain the danger of suddenly shouting into a person's ear; 

 of boxing or striking any one on the ear. 14. Why is 

 the stoppage of the Eustachian tube one of the gravest 

 dangers to the ears? Tell why colds, catarrh, etc., cause 

 this tube to become stopped up. 15. Why should an 

 aurist be at once consulted if there is any derangement 

 of hearing with or after a cold? 16. The stoppage of the 

 Eustachian tube also often occurs after what two serious 

 diseases of children? 17. Of what are unusual sounds in 

 the ear a sign? 18. Why should little children's hearing 

 be frequently tested? 19. Tell how earache may be 

 relieved, page 269. 20. Explain why an aurist should 

 be at once consulted when there is a discharge from 

 the ear. 21. State why diving and jumping into the 

 water are likely to injure the hearing. 22. How may 

 our ears be protected when we are going where loud explo- 

 sions will take place? 23. How may persons who work 

 around noisy machinery protect their ears? 24. Men- 

 tion a drug that is said to cause deafness. 25. What is 



