getting twelve additional permanent teeth by the time it completes the third year. At three years, therefore, the central permanent nippers are in apposition, and show wear, though to only a limited extent. The infundibulum is broad, as depicted in the accompanying cut. [Illustration] In the above representation of the table of a three year old tooth, it will be remarked that the infundibulum appears in the outward direction to extend quite across the surface. This aspect is produced by an indentation at that part, which, by the completion of the third year, is in most instances not worn out, but after the third year is attained, it speedily disappears; so the table of the three year off has become somewhat broader, and the infundibulum circumscribed, or well defined, as it is shown in the subjoined wood-cut. [Illustration] In fact, the shape of the table is here the best guide, and should be carefully studied, as otherwise the judgment can never be assured. At this age, one tush may be peeping through. I have never seen more than one present at three years, and then these teeth have always been slightly developed, rather indicating what was to grow than exhibiting that which had actually grown. The tushes, however, now in almost every case, may be felt under the membrane through which they are ultimately to protrude, and can most readily be felt in the upper jaw. Nevertheless, the tushes of the lower jaw always make their appearance first, because the membrane covering these is less loose, and therefore more easily penetrated; and also because the lower jaw being the active agent of mastication, as well as the resting place for the bit, it is naturally subjected to greater wear, thereby assisting the egress of the tushes. In the upper jaw they are often concealed by the loose membrane long after they are fully developed. The tushes, at this age, however, are no guides. The three year old colt, for general purposes, is easily recognized, when the lips only are separated. [Illustration: _THREE YEARS OLD._ _The Centre Horse Teeth well up and distinguished by size, shape, and Colour._] [Illustration: _THREE YEARS OFF._ _One of the lateral Milk-teeth shed, and the permanent Tooth coming up._]