4800. Solution of Carbolic Acid in Water

4800.    Solution of Carbolic Acid in Water. To obtain uniform solution, it is better to slack the carbolic acid with four times its bulk of hot water, and then to add a sufficiency of cold water; or the carbolic acid may bo first mingled with alcohol, which causes more ready solubility, before the addition of cold water. Water will not dissolve more than one-twentieth of its bulk of carbolic acid.

4801. Frank's Specific Solution of Copaiba

4801.     Frank's Specific Solution of Copaiba. Boil 2 parts balsam of copaiba, 3 parts liquor of potassa, and 7 parts water together for 2 or 3 minutes; put the mixture into a separator, and let it stand for 5 or 6 days; then draw it off from tho bottom, avoiding the upper stratum of oil, and add to tho 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 bo perfectly transparent.

4802. Mackenzie's Solution of Nitrate of Silver

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

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

4804.    Fowler's Solution; Solution of Arsenite of Potassa. Boil 64 grains ar-senious acid (in small pieces), and G4 grains bicarbonate of potassa, in 12 fluid ounces water, until the acid is entirely dissolved. When cold, add 1/2 fluid ounce compound spirit of lavender, and sufficient distilled water to make tho whole mixture measure a pint. (U.S. Ph.)

4805. Solution of Citrate of Magnesia

4805.    Solution of Citrate of Magnesia. Crystallized citric add, 37 drachms; water, 2G8 drachms; carbonate of magnesia, 22 drachms. Dissolve the acid in the water, and mix tho magnesia with it under constant stirring; filter, and add to the filtrate so much water as to bring tho weight of tho whole to 40 ounces. To prepare the lemon-ade, take of aromatized simple syrup, 4 ounces; pulverized citric acid, 48 grains; bicarbonate of soda, 64 grains. Fill into bottles of suitable size, add water and so much of the magnesia solution as is required, and cork and tie immediately. Keep in a cool place. This solution contains 80 grains of citrate of magnesia to the ounce of fluid.

4806. Parisel's Solution of Citrate of Magnesia

4806.    Parisel's Solution of Citrate of Magnesia. M. Parisel recommends the following method of preparing this article, which ho has followed during two years, as being both simple and effectual: Take of powdered and well dried citric acid, 20 parts by weight; carbonate of magnesia, 12 parts; mix accurately, and enclose the powder in a slightly warmed and well-dried bottle, which must be kept well stopped. The mixture thus made is rapidly dissolved in three times its weight of water at the ordinary temperature; and, if tho water bo pure, the solution in a few minutes becomes perfectly transparent, without any precipitate. The salt preserves its solubility for a long time.