QUITTOR. 323 



the next head. The principal causes of bruises ot the foot are 

 leaving the sole too much exposed by means of a narrow- webbed 

 shoe, or the smith paring out tlie sole too closely, or the pressure 

 of the shoe on the sole, or the introduction of gravel or stones 

 between the shoe and the sole. 



Th author subjoins the mode of cure in this disease, as it has 

 been practised by two veterinary surgeons. They are both ex- 

 cellent, and, so far as can well be the case, satisfactory. 



Mr. Percival says: — " The ordinary mode of cure consists in 

 the introduction of caustic into the sinus ; and so long as the car- 

 tilage preserves its integrity — by which I mean, is free from de 

 cay — this is perhaps the most prompt and eflectual mode of pro- 

 ceeding. The farrier's practice is to mix about half a drachm of 

 corrosive sublimate in powder with twice or thrice the quantity 

 of Hour, and make them into a paste with water. This he takes 

 up by little at a time with the point of his probe, and works it 

 about into the sinus until the paste appears rising in the orifice 

 above. After this is done, he commonly has the horse walked 

 about for an hour or two, or even sent to slow work again, which 

 produces a still more effectual solution of the caustic, at the same 

 time that it tends greatly to its uniform and thorough diffusion 

 into every recess and winding of the sinus. The consequence of 

 this sharp caustic dressing is a general slough from the sinus. 

 Ever}' part of its interior surface is destroyed, and the dead par- 

 ticle? become agglutinated, and cast off along with the discharges 

 in the form of a dark, firm curdled mass, which the farrier calls 

 the core ; and so it commonly proves, for granulations follow close 

 behind it, and fill up the sinus." 



The other mode of treatment is that of Mr. Newport, a surgeon 

 of long standing : — " After the shoe has been removed, thin the 

 sole until it will yield to the pressure of the thumb ; then cut the 

 under parts of the wall in an oblique direction from the heel to 

 the anterior part, immediately under the seat of complaint, and 

 only as far as it extends, and rasp the side of the wall thin enough 

 to give way to the pressure of the over-distended parts, and put 

 on a bar-shoe rather elevated from the frog. Ascertain with 

 a probe the direction of the sinuses, and introduce into them 

 a satMratecl solution of sulijliate of zinc, by means of a small 

 syringe. Place over this dressing the common poultice, or the 

 turpentine ointment, and renew the application every twenty-four 

 hours. I have frequently found three or four such applications 

 complete a cure. I should recommend that when the probe is 

 introduced, in order to ascertain the progress of cure, that it be 

 gently and carefully used, otherwise it may break down the new- 

 formed lymph. I have found the solution very raluable, where 



