DISEASES OF THE FEET. 229 



the sappy, and the suppurating; and as each has its characteristics and 

 appropriate treatment, his classification may be accepted. 



Old corns are not commonly serious, and are mainly to be looked out 

 for in buying a horse. 



In very slight cases, not causing lameness, it will be suflBcient to cut 

 away with the knife the black spot which indicates the seat of the corn, 

 and apply shoes somewhat longer than the crust, and somewhat broad 

 in tlie web at the heels, i. e., slighly projecting over the crust and bars. 



A new corn consists of exuded blood effused into the soft horn, and 

 is of a bright scarlet color. If it produces lameness, it should be pared 

 out carefully and wWiout injury to the crust or bars. After which a 

 three-quarter-shoe, or a shoe so narrow in the web at the heel that it may 

 rest only on the crust, should be applied. Either of these measures will 

 remove the cause, viz., pressure. 



A sappy corn is treated in the same way. 



A suppurating corn is a serious evil, and produces extreme lameness. 

 Take off the shoe and apply a linseed meal poultices: 



Ground linseed 1 ij. 



Olive oil 3 ij. 



Boiling water § v. 



Mix the ground linseed gradually with the water, and then add the oil with 

 constant stilling. 



After twelve to twenty-four hours, remove the poultice, and cut away the 

 softened horn until it yields easily to the pressure of the finger, and then 

 cut into the corn and give vent to the confined pus. Poultice again for 

 a day or two, as may seem to be needed. Then wash clean and apply 

 some astringent and antiseptic, as sulphate of zinc: 



Sulphate of zinc, 



Acetate of lead aa 3 ij. 



Water 1 pint. 



or, if preferred: 



CarboUc acid 3 i. 



Water |vi.toxij. 



Shake well. 



