continuous; sometimes it will cease for days, and the proprietor congratulates himself that the horse is getting well; the fetor, however, remains, and after a time it breaks forth again with redoubled vigour. The animal becomes daily worse, and would linger on, but the patience of the owner is exhausted; the knacker is employed to cut short the hopeless trouble and expense, and then a hasty examination is made for the cause of all this mischief. Such is a condensed description of the customary incidents, in the order in which they ensue; but of course the intelligent reader is aware that the symptoms of disease cannot be mapped down, as though they were results obtained from inorganic matter. Such symptoms always more or less vary, though upon the whole they present sufficient similarity to enable them, in every case, to be interpreted; and hence the value of practical experience, which enables the party possessing it to recognise a fact, when not fully declared. The writer cannot, to the like extent, communicate instruction; he must condense his remarks, and be content to speak a general truth; for if he descends to particulars he becomes tedious, and that which he would teach is disregarded. Of course the symptoms vary: all may not be present, yet one or more will lead the practised mind to the seat of injury. The history, however, which has been recorded, supposes the dead tooth to be located in the upper jaw: should it be situated in the lower jaw, some difference will be presented in the effect; for then the injury is not so serious. The discharge from the nostrils does not ensue, but the inferior maxillary bone enlarges, and the breath becomes offensive. The swelling of the bone takes place immediately under the tooth which has ceased to be a part of the living frame; and at this point also an abscess forms; this bursts, and discharges an unhealthy matter: unlike ordinary abscesses, however, which, when they have thrown out their contents, close, this, notwithstanding that the orifice is dependent, exhibits no disposition to heal up: a thin stinking liquid continuously issues from the opening, which becomes hard around its edges, and the hair about which sticks out, looking coarse and ragged. Such outward and visible signs are hardly to be misunderstood; and attention being directed to the mouth, the examination of the teeth will confirm them. From one jaw will be felt a molar projecting far above the level of the rest, and in a like degree will the opposing tooth in the other jaw be found depressed--worn down actually to the gum. All is now clear; and the question is, what shall be done? In the first place the condition of the mouth has certainly deranged the digestive organs, and, where there is room for choice, no operation, however simple or apparently safe, should be undertaken while the stomach is out of order. The seat of the disease is known, but the general health is first attended to; and when that has been in some