IJO 



Human Physiology. 



way over land and sea without chart or compass, coming back 

 to the same tree. 



I know not the use of the songs of the thrush and nighting k. 

 or the imitations of a whole forest of birds by the mocking-bird, 

 to the birds themselves. They make our dwelling-place more 

 enjoyable for us. Mr. Darwin thinks the bright plumage and 

 curious ornaments of some male birds make them more attrac- 

 tive to their females, and so promote the good of the race; bul 

 the sparrows manage with their dull grey colours, and the most 



THE BIRD OF PARADISE. 



beautiful birds are not otherwise the most charming nor the 

 most prolific. The plumage of humming-birds, parrots, pheas- 

 ants, the peacock, and great numbers of tropical birds, shows 

 that the intelligence which governs life, does not despise the 



