MECHANISM OF BREA THING. 



In order that the horse may have his breathing power 

 fully developed, it is necessary that the capacity of the chest 

 at the end of an act of expiration, should differ as much as 

 possible from what it will be at the termination of the act of 

 inspiration. For this reason the chest should be deep, the 

 ribs well arched, and, at the same time, they should have a 

 good inclination to the rear. The back ribs should be long, 

 so as to augment the size of the chest ; and the muscles which 

 move the ribs, as well as the muscles of the belly, should be 

 largely developed. I shall further allude, in Chapter XVII., 

 to the shape of the chest and ribs. 



