CH. XVII. 



NERVE-CELLS 



195 



contains a number of angular or spindle-shaped masses, which have 

 a great affinity of basic aniline dyes like methylene blue. They are 



Fir;. 207. An isolated sympathetic ganglion cell of man, showing sheath with nucleated cell lining, B. 

 A. Ganglion cell, with nucleus and nucleolus. C. Branched process. D. Axis cylinder process 

 (Key and Retzius.) x 750. 



known as Nissl's granules. These nerve-cells often contain, especi- 

 ally in the adult, granules of pigment, usually yellow, the nature of 

 which has not been determined. 



FIG. 208. Multipolar nerve-cell from anterior horn of spinal cord ; , axis cylinder process. (Max 



Schultze.) 



