544 
A. ZUNDEL. 
soon were discarded. Since, however, they have been employed 
again, not in powder, but as trochiscus. Rey recommends the 
corrosive sublimate in conic pencils, introduced to the bottom of 
the fistula ; by them he obtains an eschar, a solid clot, from the 
synovia, which closes up the wound and prevents the synovial 
flow, at the same time stimulating the granulations which close up 
the fistula. 
We have already said that these measures must be used only 
when the synovia is not purulent, as then the escape of morbid 
liquids may be prevented. It is not then uncommon to see ab¬ 
scesses forming at the back of the coronet; generally not so 
serious as is usually believed ; not as much as those which take 
place in front and which are due to suppuration of the articula¬ 
tion. After the running out of those abscesses, sometimes the 
wound of the foot assumes a better aspect, the symptoms im¬ 
prove, and the animal recovers rapidly. Injections of a very 
weak solution of tincture of iodine, as well as the baths of cop¬ 
per or iron, are then very advantageous. Hertwig advises the in¬ 
troduction of a seton through the sesamoid sheath. 
This treatment is not always sutficient, especially where the 
lesions are deep. All the diseased structures must be then ex¬ 
posed, and they must be removed and the wound changed into a 
simple one, which well dressed, will heal without difficulty. The 
operation is required in proportion to the extent and nature of 
the lesion, and if this is recent, and comparatively superficial, if 
a piece of the foreign body jmt remains in the wound, or if 
its removal has resulted in the sloughing of a small piece of 
dead tissue, it may be sufficient, the foot being pared thin, as al¬ 
ready advised, to simply make an infundibuliform opening, various 
in size, so as to expose the bottom of the wound. For that pur¬ 
pose the drawing knife or the sage knife is used, a light 
shoe is put on, and a dressing of digestive ointment, segyp- 
tiacum, or simply alcoholic mixtures, are kept on by plates. 
At times it is advantageous to assist the process of sloughing 
by the use of caustics, sulphate of copper, Vhllate’s solution, 
tincture of iodine, &c. If the wound is near or at the heels, 
the branches of the shoe are shortened and an appropriate 
