lOO 
ZOOLOGY: S. R. DETWILER 
Proc. N. a. S. 
all ganglia, regardless of size, a constant factor is introduced which has 
no appreciable effect on the cell ratios. 
Hyperplasia of the sensory centers was also demonstrated by an increase 
in the size of the posterior (sensory) roots. The latter which were con- 
nected with the transplanted limb on the right side were found to be con- 
siderably larger than those on the left side, not connected with a limb 
Fig. 6. Camera lucida drawing, showing serial sections of the sensory roots of the 
right and left seventh spinal nerve. The right root being connected with the transplanted 
limb is considerably larger than the left, which has no connection with a limb. X 40 
(fig. 6). The hypoplasia of the sensory centers resulting from extirpating 
the limb was likewise shown by a great reduction in the size of the sensory 
roots, normally connected with the limb (fig. 5) . 
The results reported in this paper, as well as confirmatory evidence 
obtained from the study of other cases not reported (AS525, AS526, AS527, 
ASSso), clearly show that excessive peripheral loading with a subsequent 
increase in the functional demands will result in a corresponding hyper- 
