508 
David H. Dolley 
ganglion was then selected for routine study and all groups of cells in 
part or whole yrere measured in seven different animals, making a total 
of 457 cells, with the inclusion of 75 belonging to the fifth order (associa- 
tion?) previously mentioned. The cells of four of these ganglia were 
first measured for only two diameters, then later two of these were checked 
the second time in determming the thh'd dimension. In the last three 
ganglia done, aU three dimensions were estimated, so that in five first 
abdominal ganglia, three from normals (Experiments 9, 10 and 13) and 
Table III. 
Centro-peripheral motor cells from the first abdominal ganglion of an 
electrically stimnlated animal (Experiment 19'. 
Diameters of Cell 
Diameters of Nucleus 
Volume 
of Cell 
Volume 
of Nucleus 
Nucleusplasma 
Coefficient 
41 X 36 X 38 
17 X 15 X 15 
56 088 
3 825 
13.7 
69 X X 40 
19 X 16 X 18 
121 440 
5 472 
21?2 
59 X 52 X 50 
24 X 17 X 20 
153 420 
8160 
17.8 
71 X 50 X 45 
19 X 19 X 18 
159 750 
6498 
23.6 
66 X 64 X 40 
24 X 18 X 20 
168 960 
8 640 
18.6 
72 X 56 X 48 
24 X 21 X 23 
193 536 
11592 
15.7 
72 X 49 X 55 
23 X 17 X 20 
194040 
7 820 
23.8 
70 X 57 X 50 
22 X 22 X 20 
199 500 
9 680 
19.6 
68 X 56 X 55 
23 X 15 X 28 
209 440 
9 660 
20.6 
75 X 42 X 70 
21 X 10 X 23 
220 500 
4 830 
44.7 
72 X 63 X 75 
27 X 26 X 25 
340 200 
17 550 
18.4 
77 X 61 X 75 
25 X 13 X 22 
352 275 
7 150 
48.3 
80 X 70 X 63 
27 X 23 X 22 
352 800 
13 662 
24.8 
99 X 59 X 68 
29 X 24 X 34 
397 188 
23 664 
15.8 
83 X 82 X 75 
34 X 28 X 30 
510450 
28 560 
16.9 
102 X 56 X 110 
25 X 14 X 40 
628320 
14 000 
43.9 
two from exercised animals (Experiments 18 and 19), all possible cells 
were fuUy measured, a total of 280, leaving 177 in the dass of early 
measurements in which only two diameters were taken. As samples, 
two series are offered of centro-peripheral motor cells which are not 
otherwise illustrated, one from Experiment 10, not artificially stimulated, 
and one from Experiment 19, stimulated by electricity (Tables II and III). 
Whüe these results brought out the general points of the constancy 
of the nucleus-plasma coefficients among resting or early active types, 
the upset in favor of the cytoplasm in advanced activity as well as 
