THE STAGES OF LIFE AND DEATH 



307 



a b c t d 



FIG. 125. (a) Normal nerve cell (large, pyramidal) of the cerebral cortex of a youth of sixteen, 

 treated according to Nissl's method ; 6, c, d, nerve cells (large, pyramidal) from the cerebral 

 cortex of old people, treated according to Nissl's method ; 6, pigmentary degeneration (fatty) 

 of the whole cytoplasm, with displacement and dissolution of the nucleus (the two neuroglia 

 cells are also full of fatty granules) ; c, dissolution of the whole cell (last stage of fatty de- 

 generation ?); d, sclerosis. (From preparations' by Cerletti.) 



Fio. 126. Nerve cells (large, pyramidal) of the cerebral cortex of old people treated according to 

 the method of Daddi and Herxheimer for fatty substances. The cellular body is more or less 

 full of fatty globules. In 6 the neuroglia cell is also charged with fatty globules. (From 

 preparations by Cerletti.) 

 VOL. V XI 



