4813. Bartlett's Preparation of Citrate of Bismuth

4813. Bartlett's Preparation of Citrate of Bismuth. Dissolve 1 troy ounce sub-carbonate of bismuth in 720 grains nitric-acid ; after effervescence has ceased, gradually introduce 11/2 fluid ounces distilled water; add to this slowly, and with constant stirring, a solution of GOO grains citrate of potassa in 2 pints distilled water. Nitrate of potassa and citrate of bismuth are formed; the latter, being insoluble, is precipitated, and, being thoroughly washed with distilled water, may be dried on bibulous paper with a gentle heat.

4814. Solution of Citrate of Bismuth and Ammonia

4814.    Solution of Citrate of Bismuth and Ammonia. Rub some citrate of bismuth with sufficient distilled water to reduce it to a uniform pasty consistence, and add cautiously, with constant trituration, strong water of ammonia until a solution is obtained, observing to avoid an excess of ammonia. Filter the liquid through paper, returning the first portions that pass, should they be turbid.

4815. Solution of Citrate of Iron

4815.      Solution of Citrate of Iron. Dilute 1 pint of solution of tersulphate of iron with 2 pints distilled water; precipitate with water of ammonia in slight excess, constantly stirring. Transfer the precipitate to a muslin strainer, and wash it with water until the washings are nearly tasteless. Drain it, and put half of it in a porcelain capsule on a water-bath heated to 150° Fahr., add 5$ 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

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 ounces avoirdupois of iron wire; aiding the complete solution of the wire by a gentle heat. Add 6 fluid drachms nitric acid, previously mixed with 2 ounces water; and evaporate the whole to 5 fluid ounces. Lastly, add water sufficient to make the whole up to 10 fluid ounces. ( U. S. Dis.)