Solution, Sol′dering. Prep. Dissolve zinc in hydrochloric acid nearly to saturation, add 1-5th part of powdered sal ammoniac, and simmer for 5 minutes. Used to make solder flow easily and take well; applied with a feather. See Soldering.
Solution, Speci′fic (Frank’s). Syn. Specific solution of copaiba; Liquor copaibæ alkalina, L. Prep. Take of balsam of copaiba, 2 parts; liquor of potassa (Ph. L.), 3 parts; water, 7 parts; boil the mixture for 2 or 3 minutes, put it into a separator, and allow it to stand for 5 or 6 days; then draw it off from the bottom, avoiding the upper stratum of oil, and to the clear liquid add of sweet spirit of nitre (perfectly free from acid), 1 part; should it turn foul or milky, a very little liquor of potassa will usually brighten it; if not, place it in a clean separator, and let it stand, closely covered, for a few days, and then draw it off from the bottom as before, when it will be perfectly transparent, without filtering. Some persons add the sweet spirit of nitre whilst the solution is still warm, mix it in as rapidly as possible, and immediately cork or fasten up the vessel. This is a good way when the article is wanted in a hurry, but is objectionable from the loss of spirit thereby occasioned, and the danger, without care, of bursting the separator.
Obs. A receipt for this article, upon the authority of Battley, has been going the round of the pharmaceutical works for many years. It is as follows:—Take 12 oz. of balsam of copaiba, and 6 oz, of calcined magnesia; rub together, add a pint of proof spirit, filter, and then add 1⁄2 oz. of sweet spirits of nitre. (‘Gray’s Supplement.’) The product of this formula, utterly unlike ‘Frank’s Specific Solution,’ is a colourless tincture, scarcely flavoured with copaiba, and holding very little
of the active matter of the balsam in solution, owing to the compound formed with the magnesia being insoluble in spirit. Such is the affinity of this earth for copaiba (copaibic acid), that it will even take it from caustic potassa. See Copaiba, and its preparations.
Solution of Strychnia. Syn. Liquor strychniæ (B. P.). Prep. Strychnia, in crystals, 4 gr.; dilute hydrochloric acid 6 minims; rectified spirit, 2 dr.; distilled water, 6 dr.; mix the hydrochloric acid with 4 dr. of the water, and dissolve the strychnia in it by means of heat; then add the spirit and the remainder of the water.—Dose, 4 to 10 minims.
Solution of Subac′etate of Lead. Syn. Liquor of subacetate of lead, L. of diacetate of l.†, Goulard’s extract; Liquor plumbi, L. plumbi diacetatis (Ph. L.), Plumbi diacetatis solutio (Ph. E.), Plumbi subacetatis liquor (Ph. D.), L. Prep. 1. (Ph. L.) Acetate of lead, 27 oz.; litharge, in fine powder, 16 oz.; water, 3 quarts; boil for 1⁄2 an hour, constantly stirring, and then add enough distilled water to make the whole measure 3 quarts; lastly, filter, if required, and keep it in a closed vessel. The proportions, ordered in the Ph. E. are similar. Sp. gr. 1·260.
2. (Ph. D.) Acetate of lead, 6 oz.; litharge, 4 oz.; distilled water, 1 quart; boil, &c., as before; to produce 1 quart. Sp. gr. 1·066. (B. P.) the same.
3. (Wholesale.) From finely powdered litharge, 32 lbs.; distilled vinegar, 32 galls.; boil in a perfectly bright copper pan for 2 hours, cool, add water to make up 32 galls., again simmer for 1 minute, cover up the vessel, and in an hour decant the clear portion. Common trade strength. (See below.)
Solution of Subacetate of Lead (Dilute). Syn. Goulard, Goulard’s lotion, Goulard’s water; Liquor plumbi diacetatis dilutus (Ph. L.), Plumbi subacetatis liquor compositus (Ph. D.), L. Prep. 1. (Ph. L.) Liquor of diacetate of lead, 11⁄2 fl. dr.; proof-spirit, 2 fl. dr.; distilled water, 1 pint; mix.
2. (Ph. D.) Solution of subacetate of lead and proof spirit, of each 2 fl. oz.; distilled water, 1⁄2 gall.; mix, filter, and preserve it in a well-stoppered bottle.