SUMMARY 159 



SUMMARY 



The animals which are called mammals are covered with 

 hair, and nourish their young with milk. There are nearly 

 always two pairs of appendages that undergo much modi- 

 fication according to the habits of the animals. ( )ur 

 domestic animals which serve us in so many ways have grad- 

 ually developed into their present form and usefulness. 

 Man had to learn first how to use the fur and skin of wild 

 animals, then how to improve the quality of the fur and 

 skin by careful feeding and breeding of the domesticate! 

 animals. 



FIELD SUGGESTIONS 



If you are where you can visit a Zoological park it is an easy matter to 

 learn how to distinguish the different nianimals, a thing which every one 

 should be able to do. There is another line of study which consists in 

 selecting some one or two of the common mammals, such as squirrels, and 

 making a thorough study of them from week to week, month to month, 

 year after year, until you feel thoroughly acquainted with them. A third 

 line of study is that of hibernation. Some mammals do not hibernate, 

 some do so only during cold snaps, while others go to sleep for the entire 

 winter. 



QUESTIONS 



How do you tell a mammal from other vertebrates ? What mammals 

 live near your home ? What do they eat ? Where do they spend the 

 winter ? 



REFERENCES 



Davenport, Domestic Animals and Plants. 

 Linville and Kelly, Zoology. 

 Plumb, Types and Breeds of Farm Animals. 

 Stone and Crane, American Animals. 



