4. Why has sand or sulphur no taste?
5. What was the origin of the word palatable?
6. Why does a cold in the head injure the flavor of our coffee?
7. Name some so-called flavors that are really sensations of touch.
8. What is the object of the hairs in the nostrils?
9. What use does the nose subserve in the process of respiration?
10. Why do we sometimes hold the nose when we take unpleasant medicine?
11. Why was the nose placed over the mouth?
12. Describe how the hand is adapted to be the instrument of touch.
13. Besides being the organ of taste, what use does the tongue subserve?