SHOEING. 



39 



Fig. 488.— Good Model of Concave Shoe. 



vent and cure con- 

 traction. I give 

 a variety of figures 

 showing some 

 forms of shoes and 

 methods of ex- 

 panding the quar- 

 ters. 



Contraction 

 may be divided 

 into three class- 

 es : 1. A general 

 compression, or 

 drawing in of the 

 wall upon the 

 vascular struct- 

 ure ; 2. When but 

 one or both quarters are drawn in ; 3. When the heels are curled 

 in, or pushed forward under the foot. The prevention and cure of 

 contraction must depend upon re- 

 moving excess of horn, frog-press- 

 ure, freedom of the quarters, or, if 

 necessary, opening them mechan- 

 ically as desired, and upon moist- 

 ure. Any of these conditions 

 lacking, there must in serious 

 cases be partial or entire failure, 

 no matter what the means or 

 methods used. If the feet could 

 have conditions that would afford natural moisture, and the shoes be 



made so thin that the frog 

 and sole could have reason- 

 able contact with the ground, 

 the quarters so free that 

 they could expand with the 

 growth of the feet, there 

 could be but little if any 

 contraction. 



Frog-Pressure. 



Fig. 489.— Ordinary Calks. 



Fig. 490. - Adjustable Calk. 



We see that in all cases 

 where there is reasonable 



