FATIGUK. 



317 



most carefully studied by Hodge, who first demon- 

 strated them. 1 Experiments were made on frogs and 



FIG. 73. Two sections, A and B, from the first thoracic spinal 

 ganglion of a cat. B is from the ganglion which had been 

 electrically stimulated through its nerve for five hours. A, 

 from the corresponding resting ganglion. The shrinkage of 

 the structures connected with the stimulated cells is the most 

 marked general change. A', nucleus ; N.S., nucleus of the 

 capsule ; V, vacuole, X 500 diameters. (Hodge.) 



1 Hodge, Journ. of Morphology, Boston, 1892. 



