teeth meet, he will observe that the most backward portion of the upper, not being opposed by the lower tooth, and consequently suffering no wear, bulges slightly downwards. It is this particular part, which often at the seventh year, by the wearing down of the upper tooth, becomes so apparent as to be significant of the age. It is, however, not constantly present, and the tables consequently become of the greater importance, as they are always to be found. Those of the lateral incisors begin to depart from their oval figure, and those of the central nippers are growing decidedly angular: the tushes may have the edges slightly rounded, and the semi-circle which the tables of the incisors formed when the animal was five years old, may exhibit some inclination to change in favour of the lineal arrangement that is in many horses so prominently marked in old age. This semi-circular arrangement of the incisors is most conspicuous when the colt is rising five; and from that period gradually alters, till in very old subjects the tables will occasionally be ranged almost in a straight line. The alteration which takes place in this respect is, however, by no means uniform, and though, consequently, no rule can be absolutely laid down concerning it, yet, from the known inclination of the teeth to assume a certain figure, an inference can be drawn which, connected with other signs, enables a pretty close opinion to be formed. At the seventh year, however, the corner teeth, their external figure, and the form of their tables, taken in conjunction with the wear exhibited by the central and lateral incisors, and considered with the narrowed but not yet sharp edge of the lower jaw, enable the judge to arrive, with tolerable certainty, at a conclusion. The following representation of the tables, taken in conjunction with the coloured engraving of the seven-year old mouth, will convey an idea of its appearance at that age. The reader will remark the infundibulum of the corner tooth has become circumscribed, being now encircled by a flattened surface, which posteriorly is of some width. [Illustration] [Illustration: _SEVEN YEARS OFF._ _The Corner Teeth without showing age, exhibit further evidence of wear._] [Illustration: _EIGHT YEARS OFF._ _The Gum of the lower Corner Teeth has become Square, and the lower Tush blunt._]