THE ANATOMY OF THE HORSE. 



67 



the length of this lever adds force to the spring ; for it must be remembered 

 that progression is simply a succession of springs. Hence in all four- 

 footed animals, the chief motive power lies in the hinder limbs and hence, 



Fig. 1. 



Fig. 2. 



CUT 11. -BONES OF THE HOCK. 



again, the reason why these are so much developed. Whether the animal 

 be required for draft or saddle, the propelling power requires t6 be espe- 

 cially studied. The skeleton is the frame-work upon which all this is 

 developed. 



