SECOND GRADE FALL WORK 83 



Mention wild animals which have some kind of shelter 

 during winter. Discuss the ones mentioned by the pupils, 

 and show how they are adapted to the needs of their occu- 

 pants. Make a special study of a few typical examples. 

 The gopher, prairie dog, beaver, and bear, as well as many 

 of the insects and smaller animals, secure in various ways a 

 protection from the cold of winter. The woodpecker makes 

 a nest in a hollow tree, where it remains most of the year. 

 The swallow builds a mud nest under the eaves, where it 

 rears its young, but, like most birds, it migrates to the south 

 to spend the winter. 



Many wild animals, however, seem to prepare no shelter, 

 and take whatever accident may provide. Snowbirds often 

 bury themselves in the snow to pass the night. Many 

 animals perish because they cannot provide themselves 

 suitable shelter from the storms and cold. This is particu- 

 larly true of birds that migrate, as only about one fourth of 

 those that leave us ever return. 



LESSON V 

 BUILDING MATERIALS BRICK 



Let the class visit a brick building in course of erection. 

 Of what are bricks made? What is the size of a common 

 brick? How is it laid? Why are the joints broken in the 

 wall? What ratio is the width of a brick to its length? 

 Of what value is this? Describe the mortar used in laying 

 brick. Of, what is it made ? What good does it do in a 

 wall ? How do the workmen keep the walls vertical ? 

 How thick is the wall of a one-story house? two-story, 

 etc.? 



