134 DISEASES OF THE HORSE'S FOOT 



the amount of total expansion of the heels registers nearly 

 ar inch. That the method requires the greatest care may 

 be gathered from the reports of continental writers. They 

 state that frequently the pain and consequent lame- 

 ness keep the patient confined to the stable for several 

 days. 



Numerous and but slightly differing forms of the dilator 



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) Hartmanris. — 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 



