4807. Solution of Tartrate of Soda

4807.    Solution of Tartrate of Soda. Take of carbonate of soda, 13/4 pounds; tartaric acid, 11/4 pounds; crushed sugar, 2 pounds;

hot water, 2 gallons. Dissolve the soda in 11/2 gallons of the water; the sugar in 1 quart; and the acid in 1 quart. "When all have dissolved and cooled down, add the acid slowly to the soda solution, and mix with the sugar. Filter into strong 12-ounce bottles, to each of which must he added a few drops of strong essence of lemon, and 35 grains of bicarbonate of soda. Cork immediately and tie or wire the bottles; "will keep for any length of time. This is considered a good substitute for solu-ton of citrate of magnesia.

4808. Solution of Citrate of Potassa

4808.     Solution of Citrate of Potassa. Take of citric acid, A ounce, troy ; bicarbonate of potassa, 330 grains; water, 1/2 pint. Dissolve the acid and bicarbonate in the water, and strain the solution through muslin. ( U. S. Ph.)

4809. Effervescing Citrate of Magnesia

4809.    Effervescing Citrate of Magnesia. Take of citric acid, dried and powdered, 7 parts ; heavy carbonate of magnesia, 5 parts; mix, and preserve in well-corked bottles.

4810. Effervescing Citrate of Magnesia

4810.     Effervescing Citrate of Magnesia. Take of powdered citric acid, 21/2 ounces; powdered sugar, 8 ounces; mix and triturate to a fine powder, and drive off the water of crystallization by the heat of a water-bath. Add citrate of magnesia (prepared by fusion), 4 ounces; oil of lemon, 10 drops; and mix immediately; then add bicarbonate of soda, 3 ounces; and again triturate until the whole forms a fine powder, which must be preserved in well-stoppered bottles. From 1 to 3 table-spoonfuls, mixed in a tumbler of water, furnishes an effervescing draught, in which the undissolved portion is so nicely suspended that it can be taken without inconvenience.

4811. Effervescing Citrate of Magnesia

4811.    Effervescing Citrate of Magnesia. Take of crystallized citric acid, 20 grains; carbonate of magnesia, 14 grains; mix in a tumbler of cold water and drink the mixture whilst effervescing.

4812. Solution of Citrate of Bismuth

4812.    Solution of Citrate of Bismuth. Put 2 ounces pure Sub-nitrate of bismuth into a porcelain dish, add 1450 grains nitric acid of specific gravity 1.44; heat over a spirit lamp until the bismuth is dissolved; then add one fluid ounce water, and let stand until cold; then gradually add water, constantly stirring with a glass rod, until a further addition produces milkiness, or until the whole measures 11/2 pints. Filter and set aside.

Next, dissolve 3 ounces citric acid in 11/2 pints water, and exactly neutralize the acid with carbonate of soda dissolved in water. It is important that there shall bo no excess of soda, as the resulting citrate of bismuth would be contaminated with the oxide after decomposition. Put the bismuth solution in a suitable vessel, and add, stirring constantly with a glass rod, sufficient of the solution citrate soda exactly to decompose; the precise quantity is known to have been added, when, after placing the whole upon a cloth filter, the washings, after having been suffered to run awhile until clear, first, fail to precipitate bismuth when dropped into water, and, second, show no precipitate upon the addition of a few drops of ternitrate of bismuth, a small quantity of which should be reserved for this purpose. When the liquid portion has mostly passed, pour water upon the filter until thoroughly washed from nitrate of soda, or until the water passes tasteless; then, after draining, transfer to bibulous paper, and dry by gentle heat.