134 



DISEASES OF THE HORSE'S FOOT 



the amount of total expansion of the heels registers 

 nearly an inch. That the method requires the greatest 

 care may be gathered from the reports of continental 

 writers. They state that frequently the pain and con- 

 sequent lameness keep the patient confined to the stable 

 for several days. 



Numerous and but slightly differing forms of the dilator 



iM&'^ 



Fig. 75. — De Fay's Vice. 



are on the market. As in principle they are all essentially 

 the same, and are to be found illustrated in any reliable 

 instrument catalogue, they need no description here. 



(c) Hartmann's. — A further useful expansion shoe is that 

 of Hartmann's (Fig. 76), in that it may be adapted for either 

 unilateral or bilateral contraction. This shoe is also provided 

 with bar-clips, and forcibly expanded at the heels by means 

 of a dilator. The expansion is governed by saw-cuts 

 through the inner margin of the shoe directed towards its 



