178 



left hind and left fore-feet giving one sound, and 

 the right hind and right fore another. This may 

 be so, and consequently, perhaps the double action 

 never entirely lose a slight one-sided element, but 

 this would seem to take from its perfection, and we 

 should rather believe that the two sounds come 

 from the slight difference in the times of landing 

 of the two front and the two hind feet. 



:§L58. The " Disunited gallop.'' In this move- 

 ment the shoulder of, say the left side, is in ad- 

 vance, while the stifle-joint of the same side is in 

 rear. On our theory this must be explained by 

 supposing the horse to introduce the wrong con- 

 dyle into action with the ophidian movement. 



§159. We shall leave the other actions of the 

 horse for the subject of riding, since their descrip- 

 tion is so connected with that of the " aids " used 

 by the rider for producing them, as to render it 

 difficult to separate the one from the other. 



