GROWTH OF THE INNER EAR OF ALBINO RAT 



51 



According to the turn of the cochlea, the values from nine 

 to fifteen days become gradually larger on passing from the 

 base toward the apex. After twenty days, however, this relation 

 vanishes, and the values become nearly the same through all 



TABLE 19 

 Radial basal breadth of the inner pillar on age (chart 8) 



day* 



1 



3 



ti 



9 



12 



15 



20 



25 



50 



100 



150 



257 



366 



546 



Ratios 6 

 20 



25 5O 5Q IOO 20O 3OO 4OO 5OO 



ChartS. The radial basal breadth of the inner pillar (not pillar cell), 

 table 19, figure '2, distance 3. 



the turns. In table 20 the ratios of the turns I to II, I to III, 

 and I to IV are given for three age groups (condensed from table 



