CANKER. 163 



against his head. The inflammation is thus increased, and the tip of the 

 ear becomes exceedingly sore. This causes him to shake his head still 

 more violently, and the ulcer spreads and is indisposed to heal, and at 

 length a fissure or crack appears on the tip of the cartilage, and extends 

 to a greater or less distance down the ear. 



The narration of one or two cases may be useful, as showing the invete- 

 racy of the disease. 



8th Feb. 1832. A Newfoundland dog, very fat, had dreadful canker 

 in both ears, and considerable discharge of purulent matter. He was con- 

 tinually shaking his ears, lying and moaning. Apply the canker lotion, 

 and give the alterative balls. 



13th. The discharge considerably lessened from one ear, but that from 

 the other has increased. Continue the lotion and apply a seton. 



22nd. The dog, probably neglected at home, was sent to me. Both 

 ears were as bad as ever. 



25th. The dog is perfectly unmanageable when the lotion is poured into 

 the ear, but submits when an ointment is applied. Use ung. sambuci, 3J. 

 cerus. acet.sj., mix well together. Continue the alteratives. 



30th. Slowly amending ; the whining has ceased, and the animal seldom 

 scratches. Continue the lotion, alteratives, and purgatives. 

 10th. Oct. Slowly improving. Continue the treatment. 

 17th. One ear well, the other nearly so. 

 24th. Both ears were apparently well. Omit the lotion. 

 28th. One ear was again ulcerated. Applied the aerugo aeris. 

 31 st. This has been too stimulating, and the ulceration is almost as great 

 as at first. Return to the ung. sambuci and cerusa acetata. 



From this time to the 24th February, 1833, we continued occasionally 

 taking out the seton, but returning to it every two or three days ; applying 

 the canker lotion until we were driven from it, mixing with it variable 

 quantities of tinctura opii, having recourse to mercurial ointment, and 

 trying a solution of the sulphate of copper. With two or three applica- 

 tions we could keep the disease at bay ; but with none could we fairly 

 remove the evil. The sulphate of zinc, the acetate of lead, decoctions of 

 oak bark, a .very mild injection of the nitrate of silver, all would do good 

 at times ; but at other times we were set at complete defiance. 



Another gentleman brought his dog about the same time. This was also 

 a Newfoundland dog. He had always been subject to mangy eruptions, 

 and had now mange in the feet, the inside of the ear covered with scaly 

 eruptions, the skin red underneath, considerable thickening of the ear, and 

 a slight discharge from its base. A seton was inserted and a physic-ball 

 given every second day. The canker lotion had little good effect. Some 

 calamine ointment, with a smalln portio of calomel, was then had re- 

 course to. 



In ten days the dog had ceased to scratch himself or shake his head, and 

 the ear was clean and cool. The seton was removed ; but the animal being 

 confined, a little redness again appeared in the ear, which the lotion soon 

 removed. 



At the expiration of a month he was dismissed apparently cured ; but he 

 afterwards had a return of his old mangy complaints, which bade defiance 

 to every mode of treatment. 



Herr Maassen, V. S., Wiirtemburg, has lately introduced, and with much 

 success, the use of creosote for the cure of canker in the ear. 



M 2 



