!l)2 



JOHN C. KOCH 



As tlic distal extieiiiity of the iVinui' is approached the shaft 

 gradually becomes thinner' until the articular surface is reached, 

 where theie remains only a thin shell of compact bone. With 

 the gradual thinning of the compact bone of the shaft, there is 

 a simultaneous increase in the amount of the spongy bone, and a 

 gradual flaring of the femur which gives this portion of the 

 bone a gradually increasing gross area of cross section. 



Fig. 25 Frontal longitudinal mid-section of distal part of left femur. Taken 

 from same subject as figures 21 and 24. (Natural size.) 



