90 



THE HOUSE I LIVE IN. 



formed a door hinge took the idea of it from 

 the hinge joint of some dead animal. But 

 now for the engraving. 



I will first describe the joint of the elbow. 

 The lower portion of the arm is made up of 

 two bones; one larger, called the ulna, and 

 another smaller, called the radius. The upper 

 end of the smaller bone, d, is a little rounded, 

 and lies against a smaller hollow in the other 



