136 DISEASES OF THE H01!SE'S FOOT 



degree of incline by saying that the outer margin of the 

 bearing surface of the shoe should be from ^V to ^ inch 

 lower than the inner. 



In the case of the Broue slipper, it is the animal's own 

 weight that brings about the widening of the heels, the 

 slope or outward incline of the slijiper simply causing the 

 inferior edge of the wall at the heels to spread itself out- 

 wards instead of sliding inwards on the bearing surface of 

 the shoe. 



,1 ^-- 



Fig. 77. — The Slipper Shoe of Broue. 



{e) EinsiedeVs. — Like the ' slipper ' of Broue, the 

 Einsiedel shoe depends for its effects upon the slope of the 

 bearing surface. 



It differs from the Broue in being provided with a ' bar- 

 clip.' This, in addition to gripping the bars like the bar- 

 clips of other expanding shoes, also assists, under the body- 

 weight, in expanding the heels by the pronounced slope 

 given to its upper surface. The expanding force exerted by 

 the body-weight falls thus, through the medium of the bar- 



FiG. 78.- The Slipper and Bar-clip Shoe of Einsiedel. 



clip, partly upon the bars, instead of, as in the Broue, 

 solely upon the wall. We say parthj advisedly, for, in 

 addition to the slope upon the outer side of the bar-clips, 

 the bearing surface of the heels of the shoe i^ slightly sloped 

 outwards also. The good office served by the bar- clip is 

 the lessening of any tendency to strain upon the white 

 line. 



Those we have described by no means exhaust the 

 number of expansion shoes that have been devised. There 



