8i6 



koenig's manometric apparatus. 



the other harmonics in the note are also affected, so that the tone can be analysed optically. 

 The same may be done with the vowels.] 



Fig. 598. 

 Koenig's manometric capsule (A) and mirror (M) (Koenig). 



Fig. 599. 

 Flame-pictures of the vowels ou, o, and a (Koenig). 



416. IABYKINTH DURING HEARING. If we ask what r61e the ear plays 

 in the perception of the quality of sounds, then we must assume that, just as with 



