CHAPTER VT. 

 DISSECTION OF THE BRAIN. 



The brain should be removed immediately after kill- 

 ing the dog, and placed in alcohol for a week or longer 

 before dissecting. To prevent flattening wrap the brain 

 in raw cotton before placing it in the alcohol. 



To remove the brain, first skin the head, and citt off 

 the muscles attached to the sknll especially in the occipi- 

 tal region. Then zvith a small hand-saw carefully sazu 

 tJirougJi the bone in a horizontal plane round the skull 

 so as to isolate the cap of the skull. U^ith a little care 

 this can be done without tearing the brain at all. Re- 

 move the cap and with bone forceps chip off as much 

 of the sides of the skull as is necessary to fully uncover 

 the brain. Take out the brain by lifting it up care- 

 fully from either end, and cutting the nerves that come 

 off from the ventral surface. Cut the nerves so as to 

 leave as much of a stump as possible adhering to the 

 brain. 



In addition to the brain hardened in alcohol it will 

 be convenient to harden tivo other brains in JllUllers or 



