240 Diseases of the Appendages of the Skin. 



temic disturbance by febrifuges. One of the following 

 plans may then be adopted, viz. : 



1. Open the crack from top to bottom, and remove 

 the horn from each side in contact with the coronet 

 for the space of an inch. Put on a bar shoe to re- 

 lieve the affected part from pressure, and blister the 

 coronet. 



2. Prepare the foot for the bar shoe, then apply the 

 heated firing iron across the crack about half an inch 

 below the coronet until pain is evinced, and afterwards 

 apply a blister. 



3. A nail is driven through the hoof on each side of 

 the crack, and their points turned down ; they are after- 

 wards united by wire, which is tightened, and thus the 

 crack is closed. Another method consists of passing 

 wire, &c., from one side of the crack to the other, by 

 penetrating the hoof from without. The ends are finally 

 brought together and twisted so as to close the crack. 

 Some practitioners use an iron clamp made for the pur- 

 pose by Messrs. Arnold & Son, of West Smithfield, E.G. 

 It is inserted on the outside, and is closed by appropriate 

 forceps. Another plan consists of winding strong waxed 

 cord round the hoof, the crack being filled with gutta- 

 percha or shoemaker's wax. 



THRUSH. Softening of the frog, with the discharge of 

 a foetid, inky fluid from the cleft or fissure. It is caused 

 by contact with filth used as stopping, or excrement in 

 which the animal stands. Paring away the frog in shoe- 

 ing, and thus removing it from its natural office as a 

 weight bearer, is also a prolific source of thrush. 



Treatment. Give the animal rest, if possible, when the 

 case is severe, take off the shoes, lower the heels, thus 

 bringing the frogs under pressure. Place the animal in a 

 loose box having a dry floor, during the day. Pack the 

 fissure daily with a small quantity of tow moistened with 

 hydrochloric acid and water, equal parts of each, and 

 afterwards charged with some of the following powder : 

 oxide of zinc, i drm. ; calomel, 2 drms. When the frog 

 is so far shrivelled at the time the animal returns to work, 

 put on a bar shoe with a fixed pad of leather to supply 



