54 THE HOUSE I LIVE IN. 



brae. It is as if those above it were taken off, 

 and you viewed it while standing over it. 



When the twenty-four vertebrae are placed one 

 above another, that is, are in their natural posi- 

 tion, they contain a long hollow. This hollow is 

 filled with a soft substance, very much resem- 

 bling the marrow of other bones. It seems 

 like an arm or branch of the brain ; for there 

 is an open passage from the bottom of the cra- 

 nium, or brain-pan, into the hollow of the 

 spine. 



GENERAL DESCRIPTION. When the verte- 

 brae are put together, that is, laid upon each 

 other, there are notches between each two 

 bones at the sides, so exactly matched together 

 #s to form a hole. Thus there are as many 



