DISEASES OF THE FEET. 231 



Symptoms. — Usually lameness is very pronounced. The coronet 

 swells, sometimes to an enormous size, is hard to the touch. After a 

 time, the pus breaks through and is discharged as a thick, creamy fluid. 



Treatment. — Whatever may have been the cause, the great mischief 

 arises, not so much from the original injury, as from the tendency of the 

 pus or matter to burrow and form sinuses in the interior of the foot. 

 Therefore, in all cases, our first aim must be to afford an easy and depend- 

 ing exit to the pus. 



Eemove the shoe, and pare the sole clean, to see if the quittor has 

 been caused by a wound in that part. If it has, cut down on the brim 

 and open a channel for the pus to escape downward. If no sinuses have 

 formed, a linseed meal poultice: 



Linseed meal i iv. 



Olive oil § ss. 



Boiling water 1 x. 



Mix the linseed meal gi'adually with the water, and then add the oil with con- 

 stant stirring 



and subsequent application of an astringent lotion: 



Sulphate of zinc, 



A.cetate of lead aa 3 ij. 



Water 1 pint 



will generally effect a cure. If sinuses have formed, they must be opened 

 freely, and either probed with the actual cautery, or with a mixture of 

 powdered corrosive sublimate and flour, viz. : 



Corrosive chloride of mercury 3 i. 



Flour • . I i. 



Or, a still better practice is to syringe it out with a mixture of: 



Corrosive chloride of mercury 3 i. 



Water ! i. 



Hydrochloric acid 3 or 4 drops 



The latter is also the most simple method. 



A thorough application of either of them will be followed by the 



