2/8 



PRACTICAL HISTOLOGY. 



[xxv. 



With care observing the preparation from time to time under a 

 low power of the microscope the progress of the process of denu- 

 dation can be easily observed. By and 

 by the plexif orm arrangement of Meissner's 

 submucous plexus will be seen. Mount 

 in Farrant's solution (fig. 268). 



(L) Observe the large wide meshes of 

 the plexus. Compare the general arrange- 

 ment of the plexus with that of Auer- 

 bach's plexus. The fibres are finer, and 

 the groups of nerve-cells smaller. 



(H) Note the ganglionic nerve-cells at 

 the nodes (fig. 268). 



9. Brunner's Glands. These glands 

 are confined to the duodenum. Proceed 

 exactly as recommended for the small in- 

 testine. Stain a section with logwood and 

 use eosin as a counter stain. This gives 

 excellent results. 



Perhaps the best method is to slit up the duodenum longitudi- 



FlG. 265. Auerbach's Plexus 

 (Rabbit). Lemon-juice and 

 gold chloride, x 8. 



PIG. 266. Auerbach's Plexus (Dog). 



nally, pin it out on a cork plate, and fix it in mercuric chloride (an 

 hour at 40 C. in a thermostat, or 24 hours at ordinary tempera- 



