128 Injur its of Bone. 



3. 231. {Co7itd.) — Upper end of a right femur — macerated — with 

 section through the seat of fracture, to show the above. 



The upper fragment has been tilted forwards, and over- 

 rides the lower one. A longitudinal splinter seems to have 

 been broken from the inner side of the shaft. The medullary- 

 cavity has been closed in by bone, and the broken ends have 

 been united by bone, which in some places is extremely dense. 



W. C. G. 7. 



3. 232. United Fracture about the Middle of the Shaft. 



— Left femur — macerated, showing the above. 



The upper fragment over-laps behind the lower one, which 

 is rotated outwards. The broken ends of the bone have been 

 united by a dense callus, and the exposed medullary cavity 

 has been closed in in each fragment. It should be noted that 

 in fractures at this level the upper fragment is usually displaced 

 in front of, not behind, the lower one. B. C. i. 1. M. 30. 



3. 233. United Fracture at the Middle.— Left femur- 

 macerated, showing the above. 



The upper fragment over-rides in front of the lower, and 

 both are tilted outwards. There is considerable callus between 

 the broken ends. The closing of the medullary cavity of the 

 broken ends, and the smoothing over of the strong intervening 

 callus, are similar to that seen in previous specimens. 



B. C. I. 1. M. 33. c. 



3. 234. United Fracture about the Middle of the Shaft. 



— Right femur — macerated, showing the above. 



The upper fragment is tilted forwards and over-rides in front 

 of the lower. The medullary cavity is closed in, and the callus 

 between the fractured ends is just sufficient to unite them. 



