194 ON PROGRESSION. \ 



i 



Thus the paces of the animal consist of a ^j 

 repetition of compound circular movements of ] 

 the legs upon transferable centers. The horse I 

 naturally employs three paces, namely, the i 



walk, the trot, and the gallop. All other paces j 



-1 

 are generally artificial, and forced upon him by • 



education. 



THE WALK. I 



BoRELLi, in his ingenious treatise " de mo- 

 tu animalium," says that the horse commences 

 this pace with one of his hind legs first ; " in- 

 cipit gressus pede postico ;" and lie attempts to 

 prove the necessity of this law, by observing 

 that the body would lose its stability, if the 

 hind leg was not advanced under it, in order | 

 to acquire a new center of gravity previous to ij 

 its progressive motion. This rule, however, -j 

 is by no means constant, as appears by ocular : 

 demonstration, i 



The ill 



