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KENJI NITTONO 



rapidly than the cell bodies. Indeed, we have already seen that 

 the cells have almost ceased to grow at puberty, while some 

 slight growth is still shown by the fibers. 



The increase in the axis cylinders is somewhat more rapid 

 than that for the entire fiber, and hence for them the final ratios 

 would be even smaller. The ratios of the ratios at the bottom 



TABLE 15 



Shoxcing the relation between the diameters of the cell bodies and of the fibers in rats 

 at different ages. The series of values under the diameters of the entire fibers are 

 for the diameters of the corresponding axes 



