164 



ANATOMICAL AND PHYSIOLOGICAL STUDIES ON 



age in both the radial and cross-sections, they are almost the 

 same, with a slight tendency for the cells in the cross-section to 

 give higher values, which suggests that the long axes of these 

 cells tend to lie in the plane of the section. 



On the nucleus-plasma relations of the ganglion cells in the gan- 

 lion vestibulare. In table 119 are entered the computed diameters 

 of the cell bodies and their nuclei in the radial section, and in 

 the last column the ratios of the volume of the nucleus to that of 

 the cytoplasm obtained by the method previously given. As 



TABLE 119 

 .V ucle us-plasma ratios of the cells in the ganglion vestibulare — radial vertical section 



seen, the ratio is at birth relatively large, 1 : 4.2, and this increases 

 with age, in the earlier stages considerably, but in the later, less 

 rapidly. In the oldest age group it is largest, 1: 7.9. 



On the cross-section the nucleus-plasma ratio is also progressive 

 and the increase is very regular (table 120). Comparing the 

 ratios in the radial with those in the cross-sections, they are 

 found to be nearly the same at fifteen twenty and twenty-five days, 

 but at the later ages those in the cross-sections are somewhat 

 Larger than in the radial. It is difficult to determine whether 

 the ratios on the cross-section are really larger or whether the 



