THE CENTRAL NERVOUS SYSTEM. 22$ 



Dura Mater. A bit of this membrane should be 

 stretched on a piece of cork with pins, hardened in 

 alcohol, imbedded in hardened liver, and thin transverse 

 sections made, stained double and mounted in glycerin 

 or balsam. 



Pia Mater. This may be prepared by the method 

 given on page 127. 



