PLATE XIII. 



FIG. 1 represents the horse in the Avalk, in which 

 pace three legs are always on the ground at 

 the same time. The off fore leg B having 

 completed its action, is preparing to rise, 

 at which moment the off hind leg C alights 

 on the ground, and forms the triangle A, C, 

 D, as shown in fig. 2. 



