132 HOW THE HORSE LEARNS 



other side, and of iiaviug been rcq^uiicd to go to 

 the other side with the opposition of that rein. 

 He remembers having gone to the other side ou 

 the aid applied by the rein, and makes ready and 

 lends himself to go to the other side at the slightest 

 indication of action by the rein given in this way 

 for this purpose. Thus if in teaching him this action, 

 a force which we will call ten was employed to 

 induce him to do it the first few times, when he 

 has learnt it, a force of one is sufficient, i. e. a 

 mere indication. 



When these aids become mental aids their ac- 

 tion is more rapid, they are quicker in transmit- 

 ting the orders of the rider to the horse, and the 

 horse is quicker to execute them because he comes 

 to understand them more quickly. Thus he stops 

 more quickly on the voice signal to stop than on 

 the signal to stop given by the reins. This is the 

 reason why in order to make the horse perform 

 an action Avhich he lias never performed, more capa- 

 city, moi'c precision of aids and more strength is 

 required in the person teaching than after he has 

 learnt it. After learning it, even if the aids are badly 



