XIV AN UNAIDED MOTOR. 



that foot. In a very short time, marked by a space of thirty-eight 

 inches, the other hind foot comes to the aid of its fellow, and when 

 the first that struck is raised a fore foot is down. Thus there have 

 been both hind feet on the gi'ound at one time, and then a fore and 

 hind foot on opposite sides sustain the weight, though placed widely 

 apart — ninety inches. The hind foot does not leave the ground until 

 the fore foot is brought under the brisket, and then fifty-two inches 

 in advance of that the other foot strikes, but evidently not until the 

 first has left the gi'ound. This is proven by the space. Notwith- 

 standing the hind legs ai-e so much longer, thirty-eight inches mark 

 the step, and the photograph not only shows them on the ground at 

 the same time, but from the placing, proving that both remain 

 there for a period, uniting the strength of all the muscles. From 

 the elbow to the ground an average-sized horse will measure thirty- 

 seven inches, and after due allowance is made for the further exten- 

 sion which the straightening of the humerus affoi-ds, fifty-two inches 

 is a greater space than can be covered by the fore feet remaining on 

 the around at the same time. Now comes into action the same foot 

 which lent the last impulse at the commencement of the stride, and 

 the strain on that is far greater than either the hind legs or the other 

 fore leg has to bear. There has been none to ease it, or to bear a 

 portion of the burden, and though the othei-s have given the impetus, 

 the last supreme effoi-t is made by that. And made Avith a great 

 proportion of the weight — -at least two-thirds of that of horse and 

 rider — to be raised at a disadvantage. Is it any wonder that horses 

 " change their legs " so that the other may do its share of the 

 labor 1 Is it surprising that there should be so many " bowed 

 tendons " and " sprung sinews f Under the teachings of the in- 

 stantaneous photographs, is it at all remarkable that there should be 

 twenty race-horses go wrong in front to one behind 1 We can now 

 see what these great muscles are for which clothe the shoulder, and 

 which are bunched up on the arm, and the powerful tendons at- 

 tached to the knee, ankle and foot. The load has to be raised from 

 this one leg two and a half times in every second, and it is this 

 velocity which tells " the pace which kills." 



But there is a far gi-eater velocity which is not so well understood, 



