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$ of the jaw; indeedhappy, extremely happy is the pa tient in fuch hands, if three or four found teeth are not in the operation. — The large grinders in brought away the maxillary inferior, or under jaw, generally have but two. roots, cafes have occurred of three: however, it fometimes the points of their roots feldom happens ; take an undulating form, and fome are bent one againft, another ; in the latter cafe the points of the roots form,. as it were, a pair of pincers, which renders it extremely difficult to extraft them without either breaking their points or bringing away the bony fubftance that fepa- rates one cell from the other. — Each root (as before ob- ferved) has a fmall hole on its extremity, which re ceives a nerve and blood veffels, which by their con nection, form what is vulgarly called the chord, or mar row of the tooth, which paffes through the cavity of the nourilhmenttothe tooth. root, and conveys Having gone through a fhort, but general defcription of the teeth, as they are ufually found when complete in adults, I fhall next proceed to defcribe their gene ration, (late of embryo, and time of appearing. With admiration and aftoniifoment we behold the works of the Omnipotent Creator in the formation of of his wondrous every thing terreftrial ; in no part works is this obfervation more ftrikingly exemplified, than in the formation of the teeth. Nature here ap to have deviated from her eftablifhed laws in the pears production of all other bodies, and to have felecled a lingular method in the generation ofthe teeth; the princi of her productions originate in their roots ; on pal part the contrary, the body of a tooth is always firft formed before there is the lead appearance of a root : and what is perhaps ftill more furprifing, the outfide of the body, which is the enamel, is formed likewife before the root; this fubftance when in a ftate of embryo, is a foft mu cous matter, refemblingpaftein confidence, which from the of the encreaiing age of an infant, forms upon body the teeth, and gradually acquires a hardnefs that far