PRACTICAL HORSESHOEING. 



103 



Fig. 29. full size, transverse section, through hoof near the heel, 



SHOWING actual THICKNESS OF THE VARIOUS PARTS IN A HOOF OF MEDIUM SIZE. 



A, A, Thickness of wall at quarters. 



B, B, External junction of bars and sole at base of wall. 



C, C, C, C, Continuation of bars, overarcbing and joining themselves to 

 the frog and sole. 



D, D, External bulbs of the frog forks divided by the cleft. 



E, Internal frog-stay or spur projecting into the thick part of the plantar 

 cushion. 



F, F, Internal fissures divided by the frog-stay, designed to receive the 

 plantar cushion. 



G, G, Internal cavities which form the seat of the wings of the coffin-bone. 

 H, H, External gaps, called commissures, separating the bars and frog. 

 K, K, Cutigeral groove, or cavity, in which the coronary cushion rests. 

 S, S, Shoe properly applied on the level bearing provided by the under 



rim of wall, with the nails driven at right inclination to take a strong, short 

 hold and come out of the wall with the least injury to its fibers and without 

 hurtfuUy compressing the sensitive structures of the foot. 



The marginal line surrounding the hoof shows its relative 

 angles and levels with the rectangular border. 



