666 OPERATIONS ON THE FOOT 



collects exposed and thoroughly cleansed. The lacunse of the frog 

 are then to be dressed with ViUate's solution, JSgyptiacum oint- 

 ment and sometimes only with simple drying powders, a mixture 

 of subacetate of copper, burnt alum and tannin. When the pain 

 is excessive, glycerine, with a Httle Goulard's extract or per-chloride 

 of iron, is very beneficial. Dusting with calomel powder gives 

 also excellent results. In some cases again, excellent results are 

 obtained by poulticing. It is certain that proper shoeing must, 

 in many instances, be of great advantage. 



(B) FuETiNCLE or THE Feog. — Under this name is understood 

 the partial necrosis of that portion of the plantar cushion which 

 is situated above the frog proper, from a bruise of that part of the 

 hoof. Loiset describes it under the name of plantar jibro-choi%- 

 dritis, connecting it vyith quittor, which he named, lateral fihro- 

 chondritis. 



Symptoms. — There is nearly always, and especially at the out- 

 set, a severe lameness, the greater in degree as the mortification 

 is more extended and more deeply situated. WhUe standing, 

 the affected leg is carried forward, resting on the toe ; the heels 

 are raised, and the fetlock is half flexed. In action, the rest is 

 very slight, sometimes quite absent, and occurs on the toe only. 

 As the disease progresses, and the necrosed spot develops itself, 

 the animal rests his foot better, and the lameness diminishes. 



Upon examination of the foot early in the history of the case, 

 a small opening may ordinarily be discovered, either on the body 

 of the frog, or in its branches, while at other times there is merely 

 a discharge of a yellowish serous pus of a strong odor, and more 

 abundant in quantity than would be expected from the size of the 

 wound, while surrounding it the hoof is loose and sometimes ready 

 to drop off. If the disease is several days old a mass of dead 

 tissues is ordinarily found partly loose, projecting through the 

 opening of the frog, which has the aspect of a whitish body, 

 shghtly green, soft, loose and detached among the surrounding 

 tissues.. "When this core (bourbillon) is not visible it may some- 

 times be felt with the finger introduced through the wound in 

 the frog. 



If there is no lesion of the frog the purulent fluid accumulates 

 under the hoof, raising and loosening it from the velvety tissues 

 to a varying extent. 



Fluctuations may be sometimes even felt under the hoof. Some- 



