36 



TYPES AND BREEDS 



6. ^Massiveness, which suggests heavy muscling with the 

 thick, bulky power variety ; therefore, a horse cannot be drafty 

 without being massive. 



7. ^ime. The muscles oj^erate the bone levers by contracting 

 upon them through a fixed point and a movable insertion. For 

 that reason the resisting power of the bone must be proportionate 



Fig. 32.- 



-The draft type, showing the weight, the low, wide, compact, massive form, the 

 bone and the muscling which characterize the horse of power. 



to the contracting force of the muscle. Horses have been known 

 to fracture their own bones by tlie power of muscular contraction. 

 Furthermore, a horse has the appearance of being unbalanced in 

 his makeup if too fine in his undeq')inning. Hence the demand 

 for heavy bone in draft horses is fully warranted, but should 

 be made with a full knowledge of just what it means. The 

 region of the canon, usTially regarded as the index of bone, in- 

 cludes, in addition to the canon bone proper and the two rudi- 



