THE FEMUR 



251 



FIG. 249. Frontal longitudinal midsection of left 

 f'?mur. Taken from the same subject as the one that 

 v> as analyzed and shown in Figs. 248 and 250 i of 

 natural size. (After Koch.) 



FIG. 250. Diagram of the computed lines of 

 maximum stress in the normal femur. The section 

 numbers 2, 4, 6, 8, etc., show the positions of the 

 transverse sections analyzed. The amounts of the 

 maximum tensile and compressive stress at the 

 various sections are given for a load of 100 pounds on 

 the femur-head. For the standing position ("at at- 

 tention") these stresses are multiplied by 0.6, for 

 walking by 1.6 and for running by 3.2. (After Koch.) 



