GROWTH OF THE INNER EAR OF ALBINO RAT 



87 



known, the inner and outer pillar cells when mature show a more 

 or less S-shaped curvature, though they are straighter in the 

 earlier stages. Thus the length as measured in the adult cochlea 

 is somewhat smaller than the natural lengths. 



DEGREES 

 18 



15 



12 











25 



50 



50 100 200 300 400 500 



Chart 26 The angle subtended by the extension of the lamina reticularis 

 with the extended plane of the membrana basilaris, in degrees, table 58, figure 1 

 4-4', 8. 



In table 61 (charts 27 to 32) is given the values for the lengths 

 of the inner and outer pillar cells according to age. At first we 

 shall consider the average values for the length of the inner 

 and outer pillar cells taken together. This length diminishes 

 at three days. From three to twelve days it increases rapidly, 



