MECHANICS OF THE INNER EAR II5 



The successive positions of the partition corresponding, 

 under the sixth provisional assumption, to the maxima, min- 

 ima, and inflection points of the curve are shown in figure 37. 



The tw^o hundred and forty initial sections move down 

 and up 8 times during the period. Let us here examine only 

 the nine most distant sections of this 

 The tone 8 group, from the two hundred and thirty- 



second to the two hundred and fortieth. 

 They move down from A to B, and up from B to E. Down 

 from E to G, and up from G to I. Down from I to J, and up 

 from J to L. Down from L to O, and up from O to Q. Down 

 from Q to S, and up from S to T. Down from T to V, and up 

 from V to Y. Down from Y to 21, and up from St to ®. Down 

 from E to 6, and up from 6 to ®=A. The nerve ends lo- 

 cated on these sections therefore receive eight shocks during 

 the period. 



The fourteen sections from the two hundred and forty- 

 first to the two hundred and fifty-fourth do not move down 

 from E to G. The nerve ends located on these sections do not, 

 therefore, receive a shock between E and I, but receive the 

 other seven shocks in the same manner as the two hundred and 

 forty initial sections. For the same reasons as in the similar 

 cases with which we have met before, it is not probable that 

 these nerve ends convey the tone 7, but rather the tone 8 with 

 a slight beat occurring once during the period, producing a 

 slightly rough tone 8. 



The sections of the partition from the two hundred and 

 fifty-fifth to the four hundred and fifty-second move down and 

 up five times during the period. Let us 

 The tone 5 examine those from the two hundred and 



fifty-fifth to the two hundred and fifty- 

 eighth. They move down from A to B, and up from B to E. 

 Down from E to J, and up from J to L. Down from L to O, 

 and up from O to U. Down from U to V, and up from V 



