102 DOMESTICATED ANIMALS 



country and over ground which no unhorsed vehicle could 

 traverse. 



The mark of the old utility of the animal in varied employ- 

 ment is retained in our use of the term horse-power in 

 measuring the energy of engines. That gauge of strength 

 of old determined what man could do in the severest taxes 

 upon the forces at his command. In attaining the point 

 where, owing to the possession of horses, he could use this 

 standard, he won a great way beyond the station of his 

 ancestors, who had but the strength of men at their command. 

 Modern invention, by giving us heat-engines, has made the 

 way for an advance. In another century, or even in another 

 generation, the horse may, save for the uses of war, be 

 confined to the position of a luxury and an ornament. 



