REASONING BY ANALOGY. 229 



else, colts would do the same left to themselves. This 

 is, however, by no means the case. Boys take such 

 strong exercise as they do, not with a view to its 

 beneficial effects on their health or constitution, but 

 in the pursuit of amusement of some sort : you would 

 never make a boy take a six-mile walk alone and on a 

 dull road ; he would rather play at marbles in a room ; 

 so the colt, not having many inducements to make 

 exertion, would, left to himself, scarcely make any. 

 The mere exercise of grazing would be sufficient to 

 prevent sickness in him ; so would a gentle walk in a 

 garden with the boy : but the boy so brought up 

 would never exhibit the robust frame of the one 

 accustomed to repeated strong exercise. If we find 

 this accelerates the growth and invigorates the health 

 and muscular power of the boy, why should we doubt 

 its having an equally beneficial effect on the colt ? 



It may be said that Nature would teach the animal 

 to take as much exercise as would be requisite for his 

 general well-doing: doubtless he would in a wild 

 state find inducement to do this ; but I am quite clear 

 he would not in a domesticated one. But, besides 

 this, we do not want an animal, that, when in a 

 mature age, will only have to use exertion sufficient 

 for his own wants and purposes : we want Vivians, 

 Lotterys, Harkaways, magnificent chargers, and cab- 

 horses : therefore we must do everything in our power 

 to force horses into these, and not trouble our heads 

 with what Nature might teach horses to do. She 

 doubtless did and does teach them to do all that is 

 necessary to make them such horses as she requires ; 

 and if she rode steeple-chases or drove a cab, would 

 doubtless know how to make a horse for her purpose : 

 but as she, does not do these things, and we do, great 



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