Take of— Sarsaparilla root, sliced 4 ounces. Boiling water 4 pints. Macerate for four hours in a vessel lightly covered, and placed near the fire; then take out the sarsaparilla and bruise it; return it again to the liquor, and macerate in a similar manner for two hours; boil it down to two pints, strain it, and then add— Sassafras root, sliced ¼ ounce. Guaiacum root, rasped ¼ do. Liquorice root, bruised ¼ do. Bark of mezeroon root 1½ drachm. Boil the whole together for a quarter of an hour, and strain. Dose, from a quarter to half a pint, three times a day. To avoid the tediousness of daily preparing the above, many manufacturing chemists evaporate a large quantity, and preserve the extract, which retains all the virtues of the decoction, and is at all times ready for immediate use. Or, Form 50. Take of— Bruised root of Jamaica sarsaparilla 4 ounces. Liquorice root, sliced ½ ounce. Lime-water 1 quart. Macerate for 24 hours in a dark and cool place—strain and bottle it, and take a pint daily in divided doses. This is a very superior form of administering sarsaparilla. Or, Form 51. Take of— Oxymuriate of mercury 2 grains. Muriatic acid 5 drops. Compound extract of sarsaparilla 2 oz. Dissolve the same in one quart of water, and take a wineglassful twice a day. Form 52. _The Iodide of Potass Mixture._ Take of— Iodide of potassium 1 drachm. Iodine 2 grains. Mucilage of acacia 3 ounces. Hydrocyanic acid 12 drops. Pure water 5 ounces. White sugar ½ ounce. Mix. Take a dessert- or tablespoonful twice or thrice daily in a wineglassful of water. Form 53. Take of— Iodide of potassium 1 drachm. Acetate of morphine 10 grains. Spermaceti ointment 1 oz. Mix. Rub a portion, the size of a nut, over the affected part night and morning. If much irritation be produced, it must be disused for a time. Forms 54, 55, 56, 57 see pages 126–128. Form 58. Take of— Sarsaparilla sliced 1 oz. China root 1 oz. Dry rind of 20 walnuts. Antimony 2 oz. Pumice stone 1 oz. (Tied in separate bags, and boiled with the other ingredients.) Distilled water 10 pints. Boil to one half, and strain. Dose—An aleglassful twice or thrice daily. Forms 59, 60, 61, 62 see page 132.