By John W. Adams, A. B., V. M. D., 



Professor of Surgery and Lecturer on Shoeing, Veicrinanj Department, XJnlversity 



of Pennsylvania. 



Bad a>nd indifferent shoeing so fiiequently leads to diseases of tke 

 feet and in irregularities of gait whicli may render a liorse unservice- 

 able, that it lias been thought appropriate to conclude tliis book with 

 a brief chapter on the principles involved in shoeing healthy hoofs. 



In unfolding this subject in the limited space at my disposal, I can 

 only hope to give the intelligent horse owner a sufficient number of 

 facts, based on experience and upon the anatomy and physiology of 

 the foot and leg, to enable him to avoid the more serious conse- 

 quences of improper shoeing. 



Let us first examine this vital mechaaiism, the foot, and learn some- 

 thing of its structure .and of the natural movements of its component 

 jDarts, that we may be prepared to recognize deviations from the nor- 

 mal and to apply the proper corrective. 



GEOSS ANATOMY OF THE TOOT. 



The hones of the foot are. four in number, three of "which — the long 

 pastern, short pastern, and coffin bone, placed end to end — form a 

 continuous straight column passing downward and forward from the 

 fetloek joint to the ground. A small accessory bone, the navicular, or 

 "shuttle," 'bone, lies crosswise in the foot between the wings of the 

 coffin bone and forms a part of the joint surface of the latter. The 

 short pastern projects about 1^ inches above the hoof and extends 

 about an equal distance to it. (See also page 36'9.) 



The pasterns and the coffin bone are held together by strong fibrovis 

 cords passing between each two bones and placed at the sides so as not 

 to interfere with the forward and backward movement of the bones. 

 The joints are therefore hi7ige joints, though imperfect, because, while 

 the chief movements are those of extension and flexion in a single 

 plane, some slight rotation and lateral movements are possible. 



The bones are still further bound together and supported by three 

 long fibrous cords, or tendons-. One, the extensor tendon of the toe, 

 passes down the front of the pasterns and attaches to the coffin bone 

 just below the edge of the hair ; when pulled upon by its muscle this 

 tendon draws the toe forward and enatoles the horse to place the hoof 

 flat uf)on the groimd. The other two tendons are placed behind the 



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