514 IRVING HARDESTY 



ably trustworthy as such. No resonance of the form demanded 

 by the Helmholtz theory is possible. It is suggested that no 

 resonance or analysis of sound is accomplished by the cochlea 

 in itself other than such as may be possible in the evidences that, 

 beginning with its basal end, different extents of the tectorial 

 membrane may be thrown into vibration by different sound 

 waves, depending upon the frequency and amplitude of vibration. 

 (6) It is admitted that waves of low frequency and high ampli- 

 tude may induce vibrations also in the less flexible and other- 

 wise less adapted basilar membrane as a whole. Attention is 

 called to the fact that its chief load, the spiral organ, increases 

 in size in passing from the base to the apex of the cochlea and 

 that this suggests a vibrator^" behavior possible in it similar 

 to but not so comprehensive as that claimed for the tectorial 

 membrane. 



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