The Morphologv of Fiuictioiial Activity in tlu> Ganglion Gells etc. 
551 
Description of Plates. 
Sections were cut in serial by Minot Precision or new Spencer Rotary microtomes. 
Measurements and figures are from the same System of lenses, made by means of Zei.ss 
Camera lucida, Zeiss comp. oc. 8, (by apochrom. obj. 3 mm, N. A. 0,95, x900 (stage 
level), figures drawn in India ink. 
As the majority of the figures appear in the tables, this description is simplified 
by a cross reference to them. Each cell illustrated is denoted in the tables by a sign 
from which the size and relative place in the series of all are sufficiently indicated. The 
figures for the most pari are drawn from a single section so that measurements made 
from the plates need not exactly coincide with those in the tables. 
Plate XXIV. 
Figs. 1 — 7. Central motor series. All except Fig. 7 are from the same animal, 
Experiment 9, Table IV. Fig. 7 is from Experiment 23, stimulated in the waterwheel, 
Table V. Fig. 1 is the resting ceU, Fig. 2 the enlargement vith constant nucleus-plasma 
relation, Fig. 3 the homologue of the Hodge stage, Fig. 4 the succeeding dispropor- 
tionate hj'pertrophy of the nucleus, Figs. 5 and 6 show later stages of the general 
hypertrophy and Fig. 7 is the final stage of dissolution of extra-nuclear chromatin and 
edema with loss of nuclear substance. 
Plate XXV. 
Figs. 8 — 12. Types of the centro-peripheral motor series. These are also diavn 
from Experiment 9 which gives the exact size comparison with the first series, as there 
are no measurements presented of these ceUs. Fig. 8 corresponds in the common process 
to Fig. 1, the resting cell, Fig. 9 to Fig. 2, Fig. 10 to the Hodge stage, while Figs. 11 
and 12 represent the later stages of hj’pertrophy and final disappearance of substance 
respectively. Fig. 12 is in cross section, the largest and most definite opening being 
its intracellular fibre. 
Figs. 13 — 17. Central sensory series. All from Experiment 13, Table VII, with 
exception of Fig. 17, which is from Experiment 9. The figures are taken from the 
groups noted in Table VII. Figs. 13, 14, 15 and 16 correspond in the common process 
to Figs. 1, 2, 3 and 4 of the first series, and Fig. 17 to Fig. 7. Fig. 15 shows the shrunken 
nucleus of the Hodge stage and properly belongs here, since the cell is langer than it 
appears, the third climension (depth) determining its actual size. 
Plate XXVI. 
Figs. 18 — 22. Centro-peripheral sensory cells. Also from Experiment 13, Table VI, 
with the exception of Fig. 22 whose measurements are not here given. Figs. 18, 19 
and 20 correspond to Figs. 1, 2 and 3 of the first series and Figs. 21 and 22 represent 
later and final stages. Figs. 19 and 20 were piuposely chosen to show how marked 
edema may be in these smallest cells even in early stages. 
Fig. 23. The resting type of the association cell. Also from E.xperiment 13. 
Fig. 24. A probable type of recovery cell, whose intracellular fibre places it 
in the motor division. 
