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n umber, and are fituated each fide next the incifores, and between them and the molares in both jaws, they have likewife but one root, and are called canini from their great refemblance to dog's teeth : the canini in the max illary fuperior are commonly called eye teeth, from an ancient fuppofition that there was a connection between them and the eyes, and that by drawing them the eye fight would be endangered, which is an erroneous idea; for daily experience evidently demonilrates that fuch a conne£lion, producing fuch effects, is merely imagi nary. The molares or grinders, are fituated immediately be hind, or upon the right and left of the canini in each jaw, and when nature furniflies the full complement, are twenty in number, including the fapientae — The fourth and fifth tooth from the fymphifis of the jaw, or two firft behind the canini, refemble each other very nearly ; the firft has generally the fmalleft crown or bo dy, and longeft root ; indeed this tooth fometimes has two roots, particularly thofe fituated in the upperjaw, but this does not always happen ; fometimes it has the appearance of two roots joined together, almoft fepa- rated by a kind of channel, which appears through the extent of the fang, and perceptibly marks out the divi- fion. — All the teeth hitherto mentioned often have their points bent, particularly the canini. The large grind ers in the maxillary fuperior, or upper jaw, have two, three, and fometimes four roots ; generally feparated from each other, and often extending or fpreading greatly, fo that the diameter from the point of one root to the other, exceed by one third the diameter of the crown ; and from hence too frequently arifes the mis fortune of fraclured jaws, broken teeth, &c. &c. by unfkilful operators, ignorant of the anatomy of the parts : accullomed to the ufe of the common turnkey only, and the pernicious murderous practice of turning the tooth out ; which, nine times out of ten,muft either break the tooth or produce a fraclure, and exfoliation