580 



OPERATIONS ON THE FOOT. 



1 



B B "" B 



Pig. 481.— Portion of the Keratogenoua Apparatus. 

 A.— The skin. B B.— Coronary band. E.— Its villosities. P.— Poaophyllous tissue. 



6/ 



Fia. 482.— Section of the Hoof. 

 l._Perlople. 3.— Cutigeral cavity. 3.— KeraphiUous tissue. 4.— Wall. 5.— Contin- 

 uation of the periople with the frog. 6.— The sole, 7.— Union of the sole and wall. 

 8.— Frog stay. 



the sole, the frog and the periople (Fig. 482). These form, 

 together, a homy box, the naU, or hoof, which is adapted exactly 

 by its internal cavity to the external contour of the sub-horny 

 membrane, contracting with it an intimate union by a reciprocal 

 reception, and thus completing the structure of the foot, furnish- 

 ing to the sensitive parts an apparatus, thick, hard, resisting and at 

 the same time elastic, which makes one with them, and protects 

 them against violence from the substances with which the foot, 

 from the nature of its function, must necessarily come in contact. 



