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KENJI NITTONO 



noted, however, that the nuclei do not show the shrinkage in- 

 dicated by the cell bodies during the last phase. 



In chart 1 I have also given a graph for the body weights of 

 the rats here used. 



COMPARISON BETWEEN THE LARGER AND SMALLER ANIMALS OF 



THE SAME AGE 



The pairs of rats of like age often differed considerably in 

 body weight. I have attempted therefore to determine to what 



Chart 3 Based on table 5 and giving on age in days the diameters of the 

 largest cells from the gasserian ganglion of the albino rat, and of their nuclei, 

 in rats of like age but of different body weights. 



extent the difference in body weight influences the growth of 

 the cell body and the nucleus. 



Table 5 (based on the original data) gives the values for the 

 large and the small rats having the same age, and these values 

 are used for chart 3 in which the average diameters of the cell 

 body and the nucleus are plotted on the body weight. From 

 table 5 it is clear that the diameters of the cell bodies and the 

 nuclei of the larger animals are on the average slightly greater 

 than those of the smaller rats. 



The number of cases in which the larger animals have the 

 greater cell body amounts to eleven out of eighteen, or 61 per 



