DISEASES OF THE EAR. 189 



several reasons. In the ' Recueil de M^d. V^t^rinaire ' 

 Coculet recommends, as a very successful method of dealing 

 with these auricular chancres, the application of some blis- 

 tering ointment or liquid over the external surface of the ear. 

 The preparation he employed was tincture of cantharides, 

 forty-five grammes; tincture of oak galls, ten grammes. This 

 was applied once every two days, and by its influence the 

 intolerable itching which accompanies the disease was allayed, 

 and a smart but inconvenient pain substituted. The animal 

 no longer shakes its head, nor scratches the ears with its 

 paws, and the chancres soon disappear." 



SEROUS ABSCESS. 



It not unfrequently happens from the violence applied in 

 canker to the inflamed organ by the dog himself, or, indepen- 

 dent of canker existing, from blows or bruises, that an effusion 

 of serum takes place between the integument on the inside of 

 the ear and the cartilage underneath, giving the organ a pecu- 

 liar, dropsical, baggy appearance. In such a case it is best to 

 open the sac at its most dependent part with a lance, making 

 a free incision, and evacuating the contents. In a short time 

 the wound will heal, and the ear assume its natural condition. 

 There is no necessity to induce suppuration ; if nature estab- 

 lishes it, well and good, and it must then be treated as a sup- 

 purating sore. 



POLYPUS. 



The formation of polypus on the lining membrane of the 

 external meatus is not uncommon in the dog. The. tumor 

 usually assumes one of two forms : the soft and vascular, 

 situated in the anterior half of the meatus, or the full and 



