Hatai, Spinal Ganglion Cells. 45 



dition, as is shown by the technique for the detection of P. and 

 Fe. These nucleins pass into the cytoplasm by diffusion. The 

 diffusion occurs most actively from the two poles of the oval 

 nucleus. 



(6) The changes in the nerve cells in pathological condi- 

 tions or after excessive stimulation may be regarded as the re- 

 sult of hyperactivity since similar changes are observed nor- 

 mally in the cells during the period of most active growth. 



(7) A return of the Nissl granules as such from the cell 

 body to the nucleus by means of the astral rays (Holmgren) 

 was not observed in the case of the white rat. 



(8) A formation of the neuroglia nuclei from the migrated 

 accessory nucleoli (Rohde) was not observed. 



(9) There is not the slightest evidence to favor the recent 

 theory presented by Kronthal, who believes that the nerve 

 cells are built up from leucocytes. 



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