In tumefied flap of the ear, the tumour ought either to be opened its full length, and a pledget of lint introduced, to prevent too hasty a union of the outer edges of the sac; or a seton should be introduced, embracing the whole of the tumour, which should be suffered to remain for a week or ten days. By this means, instead of a discharge of serum, healthy matter will form in a little time; the sides will granulate and unite, and on the removal of the seton, the external lips of the wound will close firmly and healthily.—_Blaine._ CANKER, _v._ To corrupt, to corrode; to infect, to pollute. CANOA, or CANOE, _s._ A boat made by cutting the trunk of a tree into a hollow vessel; a very light boat. The Poole canoe is built sharp at both ends, on the plan of the Greenland whale-boat, except being so flat at the bottom as to draw only two or three inches of water, and so light as to weigh only from sixty to two hundred pounds. In making all canoes for gunning, the builder should be careful to have the bottoms of them a little rounded (say about half an inch of convex “a-midships,” for a bottom three feet broad); and, what is of still more consequence, a little “kammelled,” or sprung; that is, gradually rising “fore and aft,” in order to “give them life.” They will, otherwise, row miserably heavy, and, when they get aground, suck the mud or sand so much, that, in order to get them off again, you might be forced to stand up, and this would frighten away the fowl. If, however, the bottom of a canoe is too much kammelled, she will never keep steady in going to birds. Some people, for this reason, leave hollow grooves between the bottom planks. I should say, that to every five feet of plank I would give about one inch of “kammel;” so that the bottom of the canoe being ten feet, would, by holding a string along the centre of the bottom, outside, prove convex about two inches. If a little more, she would be none the worse; perhaps the better, provided that she drew water enough to give a bearing to every part; otherwise the ends that were sprung, would, by being out of the water, “cluck” so much as to make birds swim away in the night. In short, let your draught of water be the chief guide to regulate the kammelling, or springing, of your punts and canoes. If not required for rough work, or a fixed swivel-gun, I should recommend all the planks to be not more than three quarters of the thickness specified in the plate; as nothing, provided it be perfectly safe, can be too light for getting to wild birds. It is the large size of a boat, not the substance of the wood, that makes her safe in a sea. If the builder puts some oakum and tar round the heads of the principal nails, before he drives them in, so much the better.—_Hawker._ CANTER, _s._ A short gallop.