240 FUNCTIONS OF THE VESTIBULE. [BOOK in. 



largely contributes to the value of a sound as an element of music, 

 is in part dependent on vibrations, which being irregular, that is, 

 having no exact arithmetical relation to the fundamental tone, may 

 be spoken of as noise. We are thus driven nearer and nearer to 

 the conclusion, that when we are listening to sounds we do not 

 hear this sound with the cochlea and that with the vestibule, but 

 that we hear each sound, whether it be music or noise, with so to 

 speak the whole ear. But if this be so, then the origin and nature 

 of auditory impulses must be still more complex and difficult than 

 appears from the study of the cochlea alone, perplexing as they 

 even then seem. 



