32 ELEMENTARY PHYSIOLOGY. [l. 



trigeminal. Observe on the nerve at the junc- 

 tion of the three branches, the swelling of the 

 Gasserian ganglion. 



Observe also that the nerve in leaving the brain 

 has two roots, a small and a large, that the 

 small root passes beside the ganglion on the 

 large root, without efitering into it, and that the 

 fibres of the small root are, beyond the ganglion, 

 almost entirely confined to the third or inferior 

 maxillary branch. 



20. Cut out the tongue taking care to remove the 

 whole of it; on either side of the posterior upper 

 surface, will be seen a small oval patch, the 

 papilla foliata or lateral taste organ ; note the 

 parallel ridges running at right angles to the 

 long axis of the papilla. 



As an introduction to the methods of preserving 

 and hardening tissues, the following should be 

 done by each student. The tissues should be 

 removed from the rabbit as soon as possible 

 after it has been killed, and sections should be 

 cut when the Lessons deaHng with the several 

 tissues are being worked through. 



1. Cut out from the greater curvature or fundus of 

 the stomach a piece about 1 c. m. square, wash 

 it for a moment in NaCl. "6 p.c. to remove any 

 acid or any food substance on the surface of the 

 mucous membrane; with hedgehog quills or 

 small pins fasten it out on a piece of cork with 



