MECHANICS OF THE INNER EAR 107 



by these nerve ends, then, is probably the tone 8 slightly 

 beating, that is, being characterized by a slight roughness. 



The nineteen sections from the sixty-second to the eight- 

 ieth move down from g to B, and up from B to D. Down 

 from D to F, and up from F to H. Down from H to J, and 

 up from J to L. Down from L to N, and up from N to P. 

 Down from P to R, and up from R to T. Down from T 

 to V, and up from V to X. Down from X to 2), and up from 

 ® to {$?. The nerve ends located on these sections therefore 

 receive seven shocks during the period ; but, here as above, 

 it is highly improbable that they could convey, merely be- 

 cause of the omission of the stimulus at Z, the sensation of the 

 tone 7 instead of 8. Most probablv the tone heard is 8 with 

 a slight roughness. 



The fifty-eight sections from the eighty-first to the one 

 hundred and thirty-eighth move down from g to B, and up 

 from B to H. Down from H to J, and up 

 The tone 6 from J to L. Down from L to N 1 , and up 



from N to P. Down from P to R, and 

 up from R to T. Down from T to V, and up from V to X. 

 Down from X to ©, and up from S) to $. The nerve ends 

 located on these sections therefore receive six shocks during 

 the period. 



The fifty-six sections from the one hundred and thirty- 

 ninth to the one hundred and ninety-fourth move down from 

 5 to B, and up from B to H. Down from 

 The tone 5 H to J. and up from J to L. Down from 



L to R, and up from R to T. Down from 

 T to V, and up from V to X. Down from X to 2), and up 

 from 3) to g. The nerve ends located on these sections there- 

 fore receive five shocks during the period. 



All the following sections to the three hundred and ninety- 

 first move down and up five times during the period. Let 

 us examine only the last twenty-five of this group. They move 



