DISEASES OF THE EAR. 369 



become swollen and very painful; the dead part will remain cold and 

 begin to shrivel; a line of separation then forms between the inflamed 

 and the dead or dying portion, and finally the piece destroyed drops 

 off, leaving a raw healing surface. When the ear is only slightly 

 affected by the cold an excoriation or peeling off of superficial skin 

 takes place, accompanied by some pain and itching. 



Treatment. A good liniment for frozen ears will be found in a mix- 

 ture of turpentine, ammonia, and chloroform, of each one part, added 

 to six parts of sweet oil. Kub this on the ear several times a day. It 

 will relieve pain and stimulate the circulation, thus favoring a recovery 

 of the injured structures. 



LACERATIONS OF THE EAR. 



Aggressive dogs are the most frequent cause of lacerated ear, gen- 

 erally leaving a torn, ragged edge and bruised cartilage. 



Treatment. If the wound is extensive a trimming of the ragged 

 edges becomes necessary; then fasten the edges together with silver 

 wire, catgut, or strong thick linen thread, taking a deep hold. Apply 

 pine tar. 



DISEASE OF THE CARTILAGE AND NECROSIS. 



Occasionally the cartilages of the ear become affected, usually the 

 result of a deep bruise; pus forms, which burrows under the skin, and 

 may find a discharge at .any part of the ear more or less distant from 

 the seat of the disease. When the cartilage has been extensively 

 injured, pieces of it may become dead necrosed and dissolve, to be 

 carried away with the pus, or it may lead to extensive sloughing and 

 the formation of numerous running sores. In the disease of the car- 

 tilage there is seldom much swelling or great pain. The discharge is 

 usually very offensive, and occasionally streaked with blood. When- 

 ever there is a long-continued persistent discharge from one or more 

 openings in the ear, disease of the cartilage may be suspected. 



Treatment. The sinus formed by the passage of matter should be 

 probed and searched to the bottom for the presence of a foreign sub- 

 stance or the evidence of decaying cartilage. When the probe touches 

 necrosed cartilage it will feel like the presence of a piece of dry leather 

 or partially softened wood. A counter opening must then be made at 

 this place, and all diseased cartilage cut away with the knife. The 

 subsequent treatment consists in keeping the artificial wound open for 

 the discharge of pus, and the injection of chloride of zinc, 5 grains to 

 the ounce of water, once or twice a day, until the wound is healed. 



ENCIIONDROMA OF THE KAR. 



This is an excessive growth of cartilage, found at the base of the ear 

 in the form of a hard, painless tumor, firmly attached to the movable 

 ear. The only recourse for its removal is the knife in the hands of one 

 acquainted with the anatomy of the part involved in the operation. 

 24097 i!4 



