154 Journal of Agricultural Research voi. xviii. no. 3 



ganglia showed chromatolysis in varying degrees. The most marked 

 changes were found in the sensory cells in the sacral region where disin- 

 tegration of the chromatophil granules was followed by atrophy and 

 sclerosis and was invariably accompanied by peripheral displacement 

 of the nuclei. This was not observed in the nerve cells of the cord. 



The degeneration of the myelin in the medullated fibers was even more 

 pronounced than the degeneration in nerve cells. The black clumps of 

 degenerated myelin stained by the osmic acid of the Marchi method 

 were the characteristic feature of the endoneural and extraneural fibers 

 in the gray substance in the dorsal horns and the dorsal nerve roots as 

 well as of the fibers of the columns of Burdach and Goll in the white sub- 

 stance of the cord. The changes were limited to the lumbar and sacral 

 region. In the sciatic nerve the degeneration was even more marked. 

 We can therefore assume that the disturbances are of peripheral rather 

 than central origin. 



