370 BIOLOGICAL PHYSICS 



circulation, but does not embrace, that of the purely 

 nerve structural aspect, of the subject of neuronal distinct- 

 ness. This latter part of the subject may be described 

 as illustrating, a distinctness of neural texture, from the 

 surrounding non-neural related textures, of an even 

 greater degree, inasmuch as the neuronal elements, being 

 more plastic, or solid, than their surrounding lymph 

 elements, do not lend themselves to capillary circulation, 

 or disposal, except on certain definitely organised, or 

 structural, lines of arrangement, to which they alone are 

 subservient, and to which they, of purpose, lend them- 

 selves. Thus, the neuro-plasmic elements of the various 

 neurons, after circulation through the containing tubules 

 of the medullary, and axis cylinder, substances, respec- 

 tively, furnish organisable materials capable of further 

 organisation, to the various textures, in which they 

 happen to terminate, by a final process of axonal division, 

 or disintegration, and a cellular rearrangement of the, 

 divided, or cast-off, materials, from v/hich follows, a corre- 

 sponding series of pathological manifestations, and morbid 

 entities. 



