TARTAR EMETIC—is one of the most powerful, and, in respect to horses, one of the most prostituted medicines in the whole MATERIA MEDICA: its name here is only introduced, and its properties described, that the SPORTING WORLD, as well as individuals, may be sufficiently guarded against its dangerous effects, if injudiciously administered, or secretly brought into use, by practitioners of little knowledge, and less celebrity, who, knowing no more of its preparation than its name, know less of its _effects_ than its preparation. With farriers or veterinarians of this description, it is become a favourite medicine upon so many occasions, that it stands entitled to a fair, candid, and unequivocal investigation. EMETIC TARTAR, when administered to the human frame, with a design of producing the forcible effect of a strong emetic, has never, by professional men, of the most learned, distinguished, and experienced ability, exceeded _six_ or _seven_; and in truly critical cases of dangerous emergency, _eight_ grains may have been given. _Ten_ grains have been known to operate so violently as to excite _convulsions_; _twelve_, to occasion DEATH. Amidst such incontrovertible facts, it naturally becomes a serious consideration, that men, knowing nothing of the property of medicine, should have the unrestrained privilege and permission of bringing into use articles of so much dangerous magnitude, not only without knowing their _basis_, _preparation_, and peculiar _properties_, but without the power of prognosticating their _probable_ effects. It is a circumstance worthy the attention of those possessing a number of horses for either business or pleasure, (who must consequently have some occasionally labouring under disease,) how far it may be safe, proper, consistent, or discreet, to give a horse _half an ounce_ of TARTAR EMETIC at _one_ dose, which, according to the above ascertained facts, will, if divided accurately into equal proportions, (and the experiments made,) take away the _lives_ of _twenty_ men. Those who have ignorantly adopted this practice, as ignorantly and obstinately assert the _impossibility_ of its doing _any harm_; without either not possessing the knowledge, or not giving themselves time to recollect, that if _seven_ or _eight_ grains will distress and exhaust the human frame, by every kind of violent and sensible evacuation, to the appearance of, and in some cases to actual death; what must be the internally destructive ravages of twenty (or thirty) times that quantity, thrown into the frame of an animal, who, not having, like the human species, power to regurgitate, or throw off the offending consequence by _vomit_, has no alternative, but to stand a comparative barrel of combustibles, ready to burst with the effervescent conflagration raised within, and which must, in a variety of cases, be evidently productive of certain death. But such practitioners have no character to _support_, no reputation to _lose_;