If after the dead bone has been removed the wound does not heal, syringe into it every other day about half a drachm of tincture calendula, and apply boracic ointment on lint and bandage. Wounds in cases of caries require keeping very clean with some disinfectant, as a saturated solution of boracic acid, or a solution of Pearson’s fluid; Condy’s fluid is also useful. =Cataract=: _Symptoms_: The formation of an opaque spot in the lens or pupil of the eye. In young dogs, when it occurs, which is not frequent, the whole pupil seems to be involved at once, but in old dogs it generally commences as a small speck, and gradually increases. The cornea or front of the eye generally remains clear. Of course there is loss of vision of the affected eye to a more or less extent, according to the size and density of the cataract. _Treatment_: The following drops improve the sight when the cataract does not affect the whole pupil:— _Recipe_: Sol. Sulphate of Atropine, 10 drops. Sulphate Zinc, ¼ grain. Distilled Water to 1 ounce. Operation, except for improving the appearance of the eye, is useless in the dog, as wearing of spectacles is impracticable. =Catarrh of the Nose=: _Symptoms_: Generally follows a chill from exposure to cold or from careless washing; shivering and sneezing, thin mucous discharge from nose, which is not sticky as in distemper; water discharge from eyes; a husky cough. The dog is dull for a few days, and perhaps off his food, but as a rule there is no rise of temperature as in distemper, and the teeth do not become discoloured as in the latter disease. _Treatment_: Keep quiet in a dry, warm room for a few days, and give the following mixture:— _Recipe_: Tr. Aconite, 24 drops. Spirits of Nitre, 2 drachms. Concentrated Solution of Acetate of Ammonia, 1 drachm. Water to 3 ounces. _Doses_: From half a teaspoonful to a tablespoonful[1] three times a day. Give sloppy food for two or three days, and then the ordinary diet and cod-liver oil. =Catheter, How to Pass=: