24 



LIFE IN NATURE. 



Or let us take the case of hearing. In the audi- 

 tory nerve, the equilibrium is so adjusted as to be 

 disturbed by the sonorous vibrations. An illustration 



Fig 2. c 



A magnified view of the termination of the nerves of the forefinger of a child 

 (after Wagner), a Nerve-trunk ranning on the side of the finger, b Termi- 

 nation of branch of the same withhra cellular expansion, the " touch-corpuscle." 

 c Loop of blood-vessel, d Portion of the cellular tissue of the skin. 



of the nature of the action is furnished by the fact 

 mentioned by Mr. Rogers, that masses of ice and 

 snow of considerable magnitude may be precipitated 

 from the Alpine ridges by the sound of the human 

 voice ; the gravitation of the masses, and the resist- 



