GASSERIAN GANGLION: ALBINO RAT 



247 



while the fibers after puberty increase verj' slowly in diameter. 

 In the case of the cells and fibers of the spinal ganglion, however, 

 both grow vigorously after puberty. 



TABLE 10 



Data on the diameter in n of the fibers and the axis cylinders taken from three dif- 

 ferent branches and the fifth nerve root arranged according to age 



A COMPARISON OF THE GROWTH OF THE NERVE FIBERS IN 

 LARGER AND SMALLER ANIMALS OF THE SAME AGE 



I have discussed earlier the relation of the growth of the gan- 

 glion cells in the larger and the smaller animals in the same age. 

 The present observation on the fibers was made for the same 

 purpose. Table 11 shows clearly that the mean diameters of 



