188 



HORSESHOEING. 



spring beneath a rubber bar-pad with a short shoe. The spring 

 may be stiffened from shoeing to shoeing, first by introducing 

 the ferrule at the apex of the spring and later by shifting the 

 ferrule toward the shoulder (Figs. 207, h, and 208, h). 

 For contracted hoofs of the acute-an/^led form we use the 

 bar-shoe, and if there are other diseases of the hoof present, or 

 if we wish a more rapid and continuous expansive action, we 

 use also a leather sole with foot-packing with or without a 



Fig. 208. 



Fig. 207. 



The Chadwick spring for expanding 

 contracted quarters: a, apex of spring; 

 b, ferrule to stiffen the spring; c, point 

 which is buried in a buttress of the hoof. 



A fore-hoof showing a Chad^-ick spring in 

 proper position: o, Chadwick spring; b, ferrule 

 to stiffen spring as desired; c, uncompressed 

 spring before it has been engaged against the 

 buttresses; d, buttresses in which points of 

 spring are buried. 



buttress spring. A foul frog should be properly cleansed, and 

 then disinfected A^th pine-tar thinned with alcohol or crude 

 wood-vinegar (pyroligneous acid). 



Further curative measures are : turning the horse out with- 

 out shoes (expensive and seldom practicable); applying tips; 

 using shoes the bearing-surface of whose branches inclines 

 downward and outward (unilateral contraction requires but one 

 branch to be so constructed) ; hoof-pads of rubber (Figs. 145, 



