THE HORSE I\ MOTION. 



FIG. 10. 



the heel makes contact with it. The right leg is elongating, and 

 making propulsion by so doing, in its function as an automaton and 

 also as a passive tool, by the great dorsal and pectoral making traction 

 from the flanks upon the shoulder. The support it is giving to the 

 weight of the body is shown by the narrowing of the space between it 

 and the gauge line. This action is not yet complete. Both the hind 

 feet are nearly equally elevated, but the right leg is more flexed. The 

 increased flexion of the stifle renders necessary the flexion of the hock- 



FlG. II. 



