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ANATOMICAL AND PHYSIOLOGICAL STUDIES ON 



The diameters of the nuclei in both the inner and outer hair 

 cells diminish in value after nine days of age. This decrease 

 i- larger in the outer than in the inner cells. In table 79 are 

 given the values for the diameters of the nuclei in both inner and 

 outer hair cells. In the last column are the ratios between them. 



Thus, while the volumes of the outer hair cells, as compared 

 with the inner hair cells, become relatively larger with age (table 

 78), the diameters of their nuclei become relatively smaller 

 (table 79). 



TABLE 79 — Condensed 

 Comparison of the diameters of the nuclei of the inner and outer hair cells 



Comparison of the growth of the inner and outer hair cells 

 according to sex. A careful and elaborate comparison has been 

 made to determine whether there are differences in the growth 

 of the hair cells according to sex. 



In table 80 are given the average values for the volumes of 

 the cell bodies and their respective nuclei. No significant differ- 

 ences according to sex were found. 



Comparison of the growth of the inner and outer hair cells 

 according to side. The same treatment of the data was followed 

 as in the determination for the influence of sex. In table 81 are 

 given the average values for the volumes of the inner and outer 

 hair cells and their respective nuclei. Again no significant 

 differences according to side were found. 



On the nucl< us-plasma ratios of the inner and outer hair cells. 

 For the inner and outer hair cells here measured the weighted 

 volumes <>f the cell bodies and of their nuclei are entered in the 

 condensed table 82. and the ratios of the volume of the nucleus 



