1899] 



MICROSCOPICAL JOURNAL. 



175 



alcohol in the cortical part of the brain of a sheep just 

 beheaded. One inch objective and 1J inch ocular were 

 used. At 1 is Plexus of nerve filaments; double out- 

 lines; contents clear and granular escaping at one broken 

 end; nuclei at angles of filaments. At 2 nerve filament 

 with bulbous expansions and double outlines. We used 

 on this the one-tenth inch objective and a 1^ inch ocu- 

 lar. At 3 is shown unipolar ganglionic cell dissected out 

 by alcohol. At 4, 5, 6, bipolar nerve cells and at 6 they 

 are discharging contents. 



At 7 is a tripolar cell. In a like drawing deposited in 

 the archives of the Victoria Institute, London, there is a 



DRAWING BY MRS. MARY A. (CHAPIN) SMITH. 



beautiful quadripolar cell. Indeed the whole figure is a 

 better showing than this is. At 8, larger ganglionic nerve 

 oells with nucleus and nucleolus contents granulated by 

 alcohol. 



On the left there is represented a sheep's brain as above 

 kept 48 hours in the dilute alcohol, showing the neurine 

 or white substance of Schwann in the act of exuding 

 from the granulated condensed mass of peripheral sub- 

 stance. The neurine appears in the form of loops with 

 double walls that at their finials break up into double 

 walled globes, some with nuclei and some with none, ad- 



