THE GAITS 



except that "pace," ambiguous in this sense, had 

 better be kept to mean all the gaits of a horse, and 

 not restricted to a particular one. 



When a horse, already at a fast trot, is urged to 

 move still more rapidly, so that action in diagonal 



SINGLE-FOOT 



biped becomes impossible, he may change to the 

 amble. For this, he stiffens the spine, and replaces 

 the up-and-down motion of the trot by an oscilla- 

 tion from side to side in lateral biped. Fore and 

 hind legs on the same side advance together; but 

 the motion is so rapid that the animal appears 

 to the eye to be running with the hind legs and 



45 



