rmCK, OR WOUND IX THE SOLE OK CKUST. 419 



The former is thus described by Mr. ISTewiiort, in the first volume of the 

 'Veterinarian ': — '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 obhque 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 to the over-dis- 

 tended 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 saturated solution of sulphate of zinc, by means of a small syringe. 

 Place over this dressing the common cataplasm, or the turpentine oint- 

 ment, and renew the appHcation every twenty-four hours. I have fre- 

 quently found three or four such apphcations com|34ete a cure. I should 

 I'ecommend 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 

 valuable, where the sjmovial fluid has escaped, but not to be used if the 

 inflammation of the parts is great.' 



The latter is thus given by ]\Ir. Percivall in his ' Hippopathology.' 

 Mr. Percivall says : — ' The ordinary mode of cui'e consists in the intro- 

 duction of caustic into the sinus ; and so long as the cartilage preserves 

 its integrity — by which I mean, is free from caries — this is perhaps the most 

 prompt and effectual mode of proceeding. The farrier's practice is to mix 

 about hatf a drachm of corrosive sublimate in powder with twice or thrice 

 the quantity of flour, and make them into a paste with water. This he 

 takes up by Kttle at a time \nih. the point of his probe, and works it 

 about in 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 sharjD caustic dressing is a general slough 

 from the sinus. Every part of its anterior surface is destroyed, and the 

 dead particles become agglutinated, and cast off along ■with the discharges 

 in the form of a dark firm cui-dled mass, which the farrier calls the core ; 

 and so it commonly proves, for granulations follow close behind it, and fill 

 up the sinus.' 



PEICK, OR WOUND IN THE SOLE OR CRUST. 



This is the most fi-equent cause of quittor. It is evident that the sole 

 is very liable to be wounded by nails, pieces of glass, or even sharp flints. 

 Every part of the foot is subject to injuries of this description. The 

 usual place at which these wounds are found is in the hollow between the 

 bars and the frog, or in the frog itself. In the fore-feet the injury will be 

 generally recognised on the inner quarter, and on the hind-feet near the 

 toe. In fact these are the thianest parts of the fore and hind-feet. Much 

 more frequently the laminiB are Avounded by the nail in shoeing ; or if the 

 nail does not penetrate through the internal surface of the crust, it is 

 driven so close to it that it presses upon the fleshy parts beneath, and 

 causes irritation and inflammation, and at length suppuration. When a 

 horse becomes suddenly lame, after the legs have been carefully examiued, 

 and no cause of lameness appears in them, the shoe should be taken off. 

 In many cases the offending substance will be immediately detected, or 

 the additional heat felt in some parts of the foot ■rtH point out the seat 

 of injury ; or, if the crust is rapped with the hammer all I'ound, the 

 flinching of the horse will discover it ; or pressure with the pincers will 

 render it evident. 



