30 



SHINKISHI HATAI 

 TABLE 4 



When the figures given above are considered, they show a 

 gradual increase in the number of internodes as the nerves grow 

 longer, the significance of which depends of course on the correct- 

 ness of the mean values. This method of treatment is crude 

 however, owing to the fact that the observed length of the inter- 

 node for any given diameter differs more or less from the theoret- 

 ical value. There are some reasons to believe that the theoret- 

 ical are preferable to raw mean values for this determination. 

 When we employ the theoretical values of the length of the inter- 

 nodes, the results are as follows : 



TABLE 5 



GROUP 5 



Theoretical length of the inter- 



node 531.8 



Number of nodes j 30 . 56 



Percentage increase 



1360.6 

 35.40 

 15. S3 



From the foregoing we see that whether we use the raw mean 

 length or the corrected mean length, the results are approxi- 

 mately the same; that is the data show an increase in the number 

 of the internodes as the nerve becomes longer. In fact the 

 total gain in the number of the internodes, when group 1 is com- 

 pared with group 5, amounts to as much as 16 per cent. Even 

 if we assume that the total number of measurements in group 

 1 was too small (157 observations) to trust its validity, the 

 difference between group 2 (1097 observations) and group 5 

 amounts to as high as 14 per cent. 



