140 LECTUKE XI. 



enable them to climb over rocks and the preci- 

 pices of mountains. 



Swine, especially in their wild state, have 

 very strong powers of smelling. Thus they are 

 able to find succulent roots in the ground, which 

 they turn up and feed upon. 



Squirrels are so formed that they can climb 

 up trees with great rapidity, and so are wood- 

 peckers. 



Swallows are beautifully made for their pecu- 

 liar mode of life. Thus the shape and lightness 

 of their bodies, and the length of their wings, 

 not only enable them to fly from morning to 

 night, in search of flies and other insects, but 

 also to take long flights across wide seas and 

 distant lands to different climates; according to 

 the seasons of the year. 



Look, again, at the mole, how curiously it is 

 made for its underground life ! Its fur is close, 

 thick, and soft ; its feet are admirably made to 

 enable it to form its runs in the earth; its eyes 

 are so small that nothing can injure them ; and 

 its powers of smelling so acute, that it can detect 

 worms and other insects under the soil on which 

 it feeds. Its sense of hearing is so acute, that 

 if a footstep approach the spot where it is at 



