MECHANICS OF THE INNER EAR 



139 



The sections of the partition from the five hundred and 

 forty-seventh to the five hundred and seventieth move down 

 from A to G, and up from G to @^A. The 

 The tone 1 sections from the five hundred and seventy- 



first to the five hundred and ninety-fourth 

 move down from A to 21, and up from 3t to @=:A. The nerve 

 ends located on these sections therefore receive one shock 

 during the period. 



The relative intensities of the several 

 The relative tones under the third, fourth, and sixth pro- 



intensities visional assumptions are shown in the fol- 



lowing table: 



We notice that the tone 3 is theoretically by far the 

 strongest, as is to be expected. Of the difference tones, the 

 tones 2, 1, and 5 appear to be somewhat more pronounced than 

 4 and 6. Under different assumptions concerning the physical 

 properties of the partition these results would, of course, be 

 somewhat different. 



Throughout our previous discussions we have never taken 

 into account the possibility of the tone intensities being 

 further modified by a more central nervous 

 Weber's law condition like the one usually referred to 



in audition as Weber's law. All our various approxi- 



mations towards the intensities of the ner- 

 vous processes take into consideration only conditions in the 

 peripheral organ. Whether the intensities thus found are 

 modified more centrally in accordance with Weber's law or 



