ART OF SHOEING. 



525 



formation, in three distinct parts, called respectively the wall, 

 sole, and frog. 



Each division of the hoof is composed of horn, differing 

 in texture at different parts, that which enters into the 

 composition of the wall is denser than that of the other 

 divisions, it is of a fibrous nature the fibres taking a longi- 



Fig. 219. 



tudinal direction from the upper part or coronet downwards, 

 and are endowed with an elasticity and density which admir- 

 ably fits them to embrace the complex structure, support 

 weight, and resist wear. The density of the horny fibres is 

 greatest, as we have said, as they approach the surface of the 

 wall, the outer layers acting as a cuticular covering to defend 



