VASCULARITY IN THE NERVOUS SYSTEM 



443 



With regard to the diameter of the vessels, while Adamkiewicz 

 states that those in the gray matter of the spinal cord are rela- 

 tively large, Koelliker ('96) and Sterzi (loc. cit.) find the capil- 

 laries in the white matter to be larger than those in the gray 

 matter, while Hoche states that the white matter is supplied 

 chiefly by 'Vorcapillaren,' the gray by 'echte Capillaren' in the 

 dog. The last author found less difference in the rabbit, however. 

 As indicated above, there was no marked distinction to be seen 

 in the present case. 



Fig. 5 Part of a thick section of the white matter of the cerebellum. X160. 

 The drawing was made from a rather thick part of a wedge-shaped section, so 

 that the exact thickness is unknown. (R.14.) 



The linear measurements obtained are recorded in the accom- 

 panying table 1 , the actual value for each part being given, along 

 with its ratio to the respective results for the ventral funiculus 

 and the ventral cornu of the spinal cord of the same animal. 

 The various regions are arranged in the table in order of increas- 

 ing richness of blood supply, as determined by averaging all the 

 values for each. When this is done, two horizontal lines can be 

 drawn, one separating the figures for the white matter from those 

 for the gray, the other separating the results for the motor 

 centers from those for the sensory and correlation centers. Thus, 



