NITRATE OF SILVER, OR LUNAR CAUSTIC.—The best antidote, concurrent with the emetic, is common table-salt, dissolved in water, and taken frequently. A tea-spoonful of salt in a wine-glass of water is to be given every half hour. SULPHURIC, MURIATIC, OR NITRIC ACID, or what is called the MINERAL ACIDS, require, like oxalic acid, milk, but especially, magnesia, chalk, and soap or mucilage, but primarily magnesia. HYDROCYANIC ACID, OR PRUSSIC ACID.—Where this drug is not immediately fatal, and has only been taken in moderate quantity, the only antidotes are powerful stimulants of brandy, ammonia, and ether; and as emetics are valueless in this poison, sudden effusions of cold water must be adopted with stimulants to the stomach. In all cases of poisoning by vegetable matter, whether acrid or narcotic, the first duty is to encourage the sickness, if set in, by warm water, and where the power of the stomach has been paralysed by an excessive dose, instantly to promote vomiting by a full dose of sulphate of zinc or white vitriol, in a dose varying from 20 to 30 grains, or else 10 or 15 grains of sulphate of copper or blue stone; but neither antimony nor ipecacuanha. When the stomach has been well evacuated, strong infusions of coffee, or draughts of vinegar and water are to be given occasionally. In all cases of corrosive or acrid poisons, when the lower bowels are affected, it becomes necessary to employ enemas of a soothing and corrective nature. All that the non-professional person can do in any case of poisoning, till the arrival of medical advice, is to empty the stomach of the hurtful matter by the quickest and readiest aids; and when emetics are not at hand, such natural and domestic means are to be resorted to as can be the easiest obtained; warm water, mustard, salt, tickling the gullet with a feather, or pressing down the tongue with a spoon, as already advised. It should be borne in mind, that for mineral poisons _vegetable_ emetics are to be used, and for vegetable poisons _mineral_ emetics: that in cases of poisoning from the mineral acids, it is useless to give emetics, and dangerous to administer water alone; in such cases, such articles are to be given as will counteract the corrosive virulence of the acid, and convert it into an inert compound, such as magnesia, soda, chalk, soap, or in extremity of means, the plaster from the walls: that where prussic acid has been taken, emetics are equally valueless; the prostrated powers are to be raised by powerful stimulants, and the means already indicated. For the poisons that are applied externally, and prove hurtful by absorption, such as the bite or sting of venomous reptiles, the first duty of an assistant is to tie a garter, tape, or some ligature tightly round the limb, a few inches above the wound, next to wash it immediately with warm water, and then, if there are no cracks in the lips or gums, fearlessly to apply the mouth to