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ized by great pain, and is the result of accidents or injuries, and, 

 at times, surgical operations. 



Treatment. The same as for any disease of an exalted kind, 

 using aconite root, cold water and pure air, and after the pain and 

 fever have subsided, good feeding. 



Periosteum. — The thin pearly covering investing the bone. It 

 is the stretch of this membrane in cases of splint which causes 

 pain and lameness. (See Splint.) 



Phagadena. — A name used in surgery, imph^ng a spreading 

 and destructive ulcer, which spreads rapidh^ and destro\'S the sur- 

 rounding parts. The true meaning of this word is eating, and in 

 its effects is similar to what is called, in domestic practice, hospital 

 gangrene — a local, spontaneous combustion, in which oil globules 

 are poured out in great quantity in and around the sore or ulcer. 

 These ulcers are common on the heels and legs of horses after a 

 severe winter. When on the heels, the ulcers are taken by horse- 

 men to be scratches. Phagadena does not usually assume the 

 form or appearance of a cut or scratch, but is generally a flat, 

 round or oval, and circumscribed sore at first; the hair of the part 

 stands on end, with oil drops all over the surface, and in a feu- 

 days the whole of the skin and hair falls off, or a separation of the 

 edges of the sore will take place, and the skin and flesh of the 

 part will completely fall out (called core), leaving an unhealthy- 

 looking sore, with a white sanious fluid covering the whole of its 

 surface. When the slough does not take place, it is graduall}'' eaten 

 away, and in this case leaves on the edges and surface of the sore 

 a thin dirt}' colored looking skin or membrane. 



Causes. Bad habit of body, from impure blood, death of the 

 part from exposure of the heels in some mixture of salt and snow. 

 Cold drafts under stable doors. 



Treatment. The complete removal of all dead matter belonging 

 to the ulcer, and a thorough cleansing of its inner surface. This 

 is important, as it will not only be rendered necessary as a measure 

 of cure but as a surety against its spreading further up the leg or 

 heels. Then sprinkle the edges and inner surface twice in tlie day, 

 for a day or two, with powdered blue stone to destroy the un- 

 health}' surface and hasten a red surface, or the granulatory pro- 

 cess by which the hole will be speedih' filled up again. Complete 



