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THE POPULAR SCIENCE MONTHLY. 



of a fore-foot, which constitutes the third sound, and the first beat of 

 the pace which follows, there is a period of silence whose duration is 

 exactly equal to that of the three impacts taken together ; then the 

 series of movements recommences. 



By an inspection of the curves, we see that the pressure of the feet 

 on the ground must he more energetic in the gallop than in the paces 

 already described, the height of the curves being greater than for 

 either the trot or the walk. The greatest energy seems to belong to 

 the first impact. At this moment, the body, raised for an instant 

 from the ground, falls again, and one leg alone sustains the shock. 



