of the femur, as is shown by the leg A B' C D', and the 

 leg with the shortened femur and lengthened tibia A B 

 CD. 



We have assumed in this example, that the lengthening 

 of the femur did not change the width of oscillation of 

 this radius. In reality this is not so, and the lengthening 

 of the femur, which implies the lengthening of the " flex- 

 or-femoris," would bring on a greater flexing of this 

 lever, which would accentuate still more the result which 

 we have just pointed out. 



It is then seen that during the period of suspension 

 (which is a preparation of the hind legs for grounding), 

 as well as during the period of support or propulsion, 

 great length of femur is particularly advantageous. 



46 



