MECHANICS OF THE INNER EAR 



49 



are up again. At D three are down again. From D to E the 

 stirrup moves through eleven units of space outwards. 



Fig. 17. Compare figure 16 



Therefore at E the first nineteen sections are up, eight of them 

 being up already at D. From E to F the stirrup moves in- 



Fig. 18. Compare figure ii 



wards through a little more than twenty-four units of space. 

 Therefore at F thirty sections are down, five of them being 



