In old and inveterate cases, combined with the use of the warm and vapor bath, both of which may be impregnated with it, it has wrought wonders; and in cases that had proved rebellious to every other means, although sedulously employed, it had effected a speedy and decisive cure. In the cure of an elderly person, covered almost from head to foot with syphilitic ulceration, the internal and external application of the proto-ioduret occasioned, at the end of a few weeks, the entire disappearance of the sores, leaving only a slight livid trace. In ulceration of the throat, nose, and in fissures of the genitals, indolent buboes, &c., the success is no less remarkable than effectual. The following is the formula, which may of course be altered according to circumstances:— Form 54. Take of the— Proto-ioduret of mercury 20 grains. Gum guaiacum, in powder 1 drachm. Confection of roses, as much as is sufficient. Mix to form 36 pills—one to be taken twice or thrice a day. Form 55. For external use, take of the— Proto-ioduret of mercury 1 drachm. Lard 2 oz. Mix. A portion to be rubbed over, or to dress the affected parts twice a day. If the ulceration be seated in the throat, honey of roses may be substituted for the lard. The decoction, or any other preparation of sarsaparilla, may be taken also in conjunction with the treatment just suggested. An ounce of the sarsaparilla root infused in one pint of lime-water (cold) for twenty-four hours, and a wineglassful taken three times a day, is a very eligible mode of taking it. Or— The compound extract of sarsaparilla, dissolved in lime or soft water, one ounce to the pint, and taken in similar doses to the last, is a very good mode of exhibition. Bathing is indispensable. SYPHILITIC LEPRA.