RECENT STUDIES ON THE FINER STRUCTURE OF THE 

 NERVE CELL. 



By G. E. CoGHiLL, 



I'ro/essor of Biology, Pacific University . 



The finer structure of the nerve cell remains the object of study 

 for numerous investigators. Interest centers here from many points of 

 view. From the physiological view-point there is sought the correct 

 differentiation of the protoplasm from the metaplasm and the determi- 

 nation of the relation which each of these, in its various aspects, holds 

 to the activities of the cell. The pathologist demands, further, the 

 structural basis and explanation of the various morbid activities as dis- 

 tinguished from each other and from the normal. And for the mor- 

 phologist the subject presents a variety of problems which may be 

 approached by both comparative and embryological methods. 



In a field of so varied interests and in which at the same time 

 there is much diversity of opinion, the results from various sources 

 must undergo frequent critical analysis and synthesis. In no other 

 way can the general trend of facts be discovered and progress in the 

 subject as a whole be measured and made useful. AVith this thought 

 in mind I have undertaken to study such recent papers and mono- 

 graphs relating to the structure of the nerve cell as were available 

 and to bring together synthetically the opinion of different authors 

 under topics which appear to hold important place in the minds of 

 investigators. 



The discussion is arranged according to the following plan: 



Ground Substance and Neurofibrillae 



The Moniliform Condition of the Dendrites 



Golgi's Endocellular Net 



The Gemmules 



Golgi's Pericellular Net 



Intracellular Canaliculi 



The Nucleus 



■The Nucleolus 



The Centrosome 



The Tigroid Substance and Chromatolysis 



