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Solution of Citrate of Bismuth

Put 2 ounces pure sub-nitrate of bismuth into troy ounces citric acid in coarse powder, and stir until the precipitate is nearly dissolved; then add sufficient of the reserved precipitate to fully saturate the acid. Lastly, filter the liquid, evaporate it at a temperature not over 150° Fahr., until it measures a pint. (U. S.

Dis.) 4816. Styptic Solution of Perchloride of Iron. Mix together 12 fluid ounces muriatic acid and 5 fluid ounces water; pour the mixture, a small portion at a time, on 2 ouna porcelain dish, add 1450 grains nitric acid of ces avoirdupois of iron wire; aiding the comspecific gravity 1.44; heat over a spirit lamp plete solution of the wire by a gentle heat. until the bismuth is dissolved; then add one Add 6 fluid drachms nitric acid, previously fluid ounce water, and let stand until cold; mixed with 2 ounces water; and evaporate then gradually add water, constantly stirring the whole to 5 fluid ounces. Lastly, add wawith a glass rod, until a further addition produces milkiness, or until the whole measures 1+ pints. Filter and set aside. ter sufficient to make the whole up to 10 fluid ounces. (U. S. Dis.) Lotions.

Next, dissolve 3 ounces citric acid in 1 pints water, and exactly neutralize the acid with carbonate of soda dissolved in water. It is important that there shall be no excess of Solutions of medicinal soda, as the resulting citrate of bismuth would substances in water, employed for exbe contaminated with the oxide after decom- ternal application. They may be made of position. Put the bismuth solution in a suit- any soluble medicaments that are capable of able vessel, and add, stirring constantly with exerting their action by contact with the skin. a glass rod, sufficient of the solution citrate Lotions have been divided into classes, as soda exactly to decompose; the precise quan- sedative, anodyne, stimulant, &c. Sedative tity is known to have been added, when, and refrigerant lotions are commonly emafter placing the whole upon a cloth filter, ployed to allay inflammation; anodyne and the washings, after having been suffered to narcotic lotions to relieve pain; stimulant lorun awhile until clear, first, fail to precipitate tions to assist the ripening of tumors, &c.; bismuth when dropped into water, and, sec- detergent lotions to clean foul ulcers, &c.; ond, show no precipitate upon the addition of repellant and resolvent lotions to disperse a few drops of ternitrate of bismuth, a small tumors, remove eruptions, &c. Lotions are quantity of which should be reserved for this usually applied by wetting a piece of linen purpose.. When the liquid portion has mostly with them, and keeping it on the part affected, passed, pour water upon the filter until thor-r by moistening the part with the fingers LOTIONS. previously dipped into them. Lotions are | Vinegar is often substituted for the whole or more agreeable if made with rose water. A a part of the water, and sometimes or number of these preparations are here given, part of rectified spirit, or some brandy or rum and others will be found by referring to the is added. index, under their respective headings.

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