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Solution of Indigo

Place a it clear. No heat should be used. This artistone-ware vessel containing 8 parts oil of cle is miscible with water, with which it vitriol in a tub of very cold water; add 1 part forms a kind of milk; and, from containing fine powdered indigo very gradually, to pre- all the volatile oil of the copaiba, is a very the mixture from heating. The mixture valuable preparation. Its activity is considered equal to the balsam itself, and is causes more ready solubility, before the addigiven in similar doses. tion of cold water. Water will not dissolve

4796. Solution of Permanganate of more than one-twentieth of its bulk of carbolic Potassa. M. Leconte prepares this solution acid. in the following manner: Caustic potassa, 6 4801. Frank's Specific Solution of drachms; chlorate of potassa, 5 drachms; Copaiba. Boil 2 parts balsam of copaiba, 3 binoxide of manganese, 5 drachms. Dissolve parts liquor of potassa, and 7 parts water tothe caustic potassa and the chlorate in a small gether for 2 or 3 minutes; put the mixture quantity of water, and add the manganese; into a separator, and let it stand for 5 or 6 get rid of the water by evaporation, stir- days; then draw it off from the bottom, avoiding the upper stratum of oil, and add to the clear liquid 1 part sweet spirits of nitre, perfectly free from acid; should it turn milky, a very little liquor of potassa will usually brighten it; but if it does not, place it in a clean separator, and let it stand, closely covered, for a few days, then draw it off from the bottom as before, and it will be perfectly ring constantly, and calcine the dry mass to a dark red for an hour in an untinned iron cup; allow to cool, and add a quart of plain water.

Then boil for 5 minutes in a china capsule, and you will obtain a fluid of a slightly purplish tint; decant the solution, and wash the residue with such a quantity of water as to make altogether 2 quarts. When filtering is thought necessary, the liquid should be pass- transparent. ed, not through paper, but through very fine sand. For dressing foul wounds, or for injection, use 1 drachm of this solution to from 3 drachms to 5 of spring water. 4797. Reveil's Solution of Permanganate of Potassa. The officinal solution of the British pharmacopeia consists of 80 grains of the permanganate dissolved in 1 imperial pint distilled water. This is about 1 part by weight to 110 parts water. M. Reveil recommends a standard solution of 10 parts permanganate to 90 of water, so that the solution contains 10 per cent. of permanganate. This latter strength is endorsed by the U. S. 4802. Mackenzie's Solution of Nitrate of Silver. This is used for sponging the throat and fauces, for affections of those parts. Dissolve 20 grains nitrate of silver in 1 fluid ounce distilled water.

4803. Solution of Hydrosulphuret of Ammonia. Saturate strong water of ammonia with sulphuretted hydrogen gas, then add a second portion of water of ammonia, equal to that first used, and put into well-stoppered bottles.

4804. Fowler's Solution; Solution of Arsenite of Potassa. Boil 64 grains arsenious acid (in small pieces), and 64 grains water to make the whole mixture measure a pint. (U. S. Ph.) 4805. Solution of Citrate of Magnesia. Crystallized citric acid, 37 drachms; water, 268 drachms; carbonate of magnesia, Dispensatory, which also recommends extreme bicarbonate of potassa, in 12 fluid ounces cleanliness in its preparation and use, and of water, until the acid is entirely dissolved. the bottles containing it, as organic matter When cold, add 1/2 fluid ounce compound more or less neutralizes its disinfecting and spirit of lavender, and sufficient distilled cleansing powers. The same authority orders the pencil or brush used for its application to be made of amianthus, or asbestos, in order to ensure its fullest effects. (See No. 1701.) 4798. Directions for Using Permanganate of Potassa. Reveil's standard so- 22 drachms. Dissolve the acid in the water, lution (see No. 4797) may be used at its full and mix the magnesia with it under constant strength for dressing cancerous sores and ulcers, applied with a pencil made of asbestos, or sprinkled over a dressing of the same material. For simple wounds or for injections, ade, take of aromatized simple syrup, 4 1/2 fluid ounce of the solution may be diluted ounces; pulverized citric acid, 48 grains; biwith 1 pint of water. For gangrenous wounds carbonate of soda, 64 grains. Fill into botand scrofulous ulcers, or as a gargle in un- tles of suitable size, add water and so much healthy ulcers of the mouth and throat, 1 of the magnesia solution as is required, and fluid ounce to a pint of water. For a gargle cork and tie immediately. Keep in a cool in croup and diphtheria, or as a wash for the place. This solution contains 80 grains of hands after dissecting, 2 fluid ounces to the citrate of magnesia to the ounce of fluid. pint. A dose administered internally may 4806. Parisel's Solution of Citrate of consist of 10 to 30 drops of the standard solu- Magnesia. M. Parisel recommends the foltion. (U. S. Disp.) stirring; filter, and add to the filtrate so much water as to bring the weight of the whole to 40 ounces. To prepare the lemonlowing method of preparing this article,