16 



THE ART OF HORSE-SHOEING. 



"quick" to wicli the sole is attached. Its surface i& 

 covered with papillre, like those on the coronary band, 

 but much smaller, giving an appearance somewhat like- 

 the pile of velvet. From these the horn fibres of tha 

 sole are formed, and a firm means of connection is 

 afforded for the floor of the hoof. 



Fig, 12.— Under Surface of Foot showing Sensitive Fro^ and Sole. 



The Sensitive Frog in structuro resembles the- 

 sensitive solo, but its papilla3 are very much smaller, and 

 the surface, therefore, is smoother. The irregular, pro- 

 minent surface of the frog, with its cleft and the space- 

 at each side of it, is exactly reproduced on the sensitive- 

 frog, as might be expected, for the one is moulded on the 

 other. There is one difference between the sensitive- 

 frog and the other portions of the sensitive foot whicli I 

 may here mention. It is not attached to the bones of the- 

 foot, except by its ])oint, but is situated behind the bono, 

 and has as a basis a mass of soft tissue which forms ait 

 important cushion or pad, to be referred to later. 



