THE SENSES 



air will excite the sense of smell. A tiny grain of musk 

 will continue to give out vapor and produce a smell for 

 years, and yet will not seem to diminish at all in size. 



The outer wall of the nose. 



a the nerve of smell at the base of the d curved curtains of bone. 



brain. e opening of the Eustachian tube. 



b air spaces in the skull bones. / soft palate. 



c branches of the nerve of smell. g upper jawbone. 



302. Use of smell. Spoiled food and bad air each give 

 off a bad smell, while good food and good air always smell 

 good. The sense of smell guards us against bad air and 

 bad food. 



When we have a cold in the nose we cannot smell. We 

 must keep from taking cold if we would have a good sense 

 of smell. 



Alcohol and tobacco are irritating to the nose, and spoil 

 the sense of smell. Then the great safeguard against bad 

 air and bad food is taken away. 



303. Taste. The nerves of taste are situated mostly 



