84 ON THE PHYSIOLOGICAL CAUSES OF 



the ear thus connected with it hears the corresponding tone 

 with much increased intensity. By this means it is extremely 

 easy to determine whether the proper tone of the globe is or is. 

 not contained in a compound tone or mass of tones. 



FIG. 12. 



On examining the vowels of the human voice, it is easy ix> 

 recognise, with the help of such resonators as have just been de- 

 scribed, that the upper partial tones of each vowel are peculiarly 

 strong in certain parts of the scale : thus O in ore has its upper 

 partials in the neighbourhood of b' fe. A in father in the neigh 

 bourhood of b" (an octave higher). The following gives a 

 general view of those portions of the scale where the upper 

 partials of the vowels, as pronounced in the north of Germany, 

 are particularly strong. 



Names of Notes. : ,, 



/ 6* .p.6''b ltd" 



35-6"* <*'" 



TJOAAEI O U 



1 on o a a u ee eu u 



in in in in in i u in ' in 



cool ore Scotch ft fate feel French French 



nearly nearly nearly nearly nearly nearly 



Donders/' d b'ti. 1 c"'j /'" g? o" 



1 The corresponding English vowel sounds are probably none of them pre- 

 cisely the same as those pronounced by the author. It is necessaiy to note this, 



