SIZE CHANGES IN NERVE CELL BODIES ad i 
DIFFERENT METHODS OF MEASUREMENT AND THEIR IDENTICAL 
RESULT 
Since this paper is primarily a comparison of technical methods, 
and since the morphological characters of the stages have been 
repeatedly summarized and will be again in a further paper to 
appear, it does not appear necessary to repeat them here. The 
stage numbers are uniform in all publications. The only chance 
-of confusion may come in the combination of 4’ and 5’, 4” and 5” 
in tables 2 and 3. 
TABLE 2 
Average diameters of functioning stages in centimeters 
CONTROL ANIMAL EXERCISED ANIMAL 
NUMBER OF 
Diameters of cell 
Diameters of 
nucleus 
STAGE 
Diameters of cell 
Diameters of 
nucleus 
6.86 X 3.43 2.38 X 1.59 1 6.91 X 3.44 2.40 X 1.67 
7.57 X 4.46 2.65 X 2.16 2 7.42 X 4.35 2.61 X 2.08 
6.84 XK 3.80 2.29 X74 3 7.25 X 3.69 2.11 X 1.51 
6.43 X 3:31 2.25 X 1.29 4’ and 5 6.50 XK 3.29 197 Daler 
6.87 X 3.33 2.37 X 1.50 4’’ and 5” 6.82 X 3.71 2.36 X 1.70 
6.96 XK 3.49 2.50 X 1.76 6 CAA X 3279 2.48 X 1.87 
7.23 X 4.07 2.49 X 1.93 7 7.81 X 4.13 2.45 X 2.01 
8.23 XK 4.32 Pair lla) 8 8.43 XK 4.44 2.47 X 2.14 
7.73 X 4.91 2.52 XK 2.22 9 8.47 X 4.98 2.49 X 2.21 
8.33 X 4.90 2.51 X 2.28 10 8.34 X 5.09 2.53 X 2.30 
It 8.58 X 5.67 2.57 X 2.33 
Stages 4 and 5 comprise the Hodge types, which were thus 
originally separated because stage 4 represents a more attenu- 
ated and smaller cell, and resulted in a somewhat different nu- 
cleus-plasma relation. In general, stage 4 now certainly has no 
special significance in itself, as a phase of immediate activity, 
but merely means a more slender cell to start with. It has, 
however, significance in that the slenderness is due either to lack 
of development or to functional atrophy. So for uniformity 
these stage numbers were kept, though in later publications, 
stage 5 has stood for the group. Then, after publishing in sim- 
ple numerical order in a preliminary communication, it was 
found further that actually there was a transition type between 
