THE TYPES AND CLASSES 119 



accomplished, and the sort of muscles that are capable of 

 such contraction are long, narrow and bandlike compared 

 to the short, thick muscles of power. Instability of 

 equilibrium as well as length of stride are favored in the 

 horse that is long and rangy in order to have length in his 



FIG. 51. The speed horse type. 



stride ; lithe as the result of his muscular system consisting 

 of muscles of the speed sort ; angular for the same reason, 

 his form not being rounded out by the bulk of his muscles, 

 nor by excess weight in fat ; narrow to permit of the 

 greatest directness of shoulder motion, as a narrow base of 

 support is in line with a rapid displacement of the center of 



