MANUAL OF NATURB STUDY. 21 



c. Hearing. — Compare the outer ear of children 

 with that of horse, rabbit, dog, cat, and determine 

 which is most sensitive. Is it necessary to keep 

 the ear clean? Does it ever injure the ear to take 

 cold ? Is the wax of any use to the ear ? Are the 

 hairs in the ear of any use ? Look in the horse's 

 ear for hairs. In the dog's, the cat's. Where is 

 the bird's ear ? What do we learn by means of our 

 ears ? By means of our eyes ? Our fingers ? 



d. Smell. — Name of organ, nostrils. Compare 

 with the same in horse, in dog, in cat, in hen, and 

 determine which is the most sensitive. What 

 pleasure do we get from the sense of smell ? Why 

 should the organ of smell be placed so close to the 

 mouth? Will a cold in the head injure the sense of 

 smell? How? Should we breathe through the nose 

 rather than the mouth ? Why ? Would a severe 

 cold prevent us from breathing through the nose ? 

 Draw the conclusion that it is best to avoid taking 

 cold. 



e. Taste may be dealt with in same way. 

 Discuss relative values of these senses, as to which 

 is most important, which least, etc. 



2.— The Skin. 



Review the skin or rind of the apple, the peach, 

 the plum, and grapes as to protection. Also the 



