A companion to the British pharmacopœia

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Page 58 - Acid with 3 ounces of distilled water, and add the Bismuth in successive portions. When effervescence has ceased apply for ten minutes a heat approaching that of ebullition, and decant the solution from any insoluble matter that may be present. Evaporate the solution until it is reduced to 2 fluid ounces, and pour it into half a gallon of distilled water.
Page 181 - Twenty grains of the salt dissolved in half an ounce of warm water, with ammonia added in the slightest possible excess, give on cooling a crystalline precipitate, which, when washed with a little cold water, and dried by exposure to the air, weighs 15'18 grains.
Page 3 - Acid, be put into a small flask with a few pieces of Granulated Zinc, and, while the effervescence continues, a slip of bibulous paper wetted with solution of...
Page 274 - F. ; very sparingly soluble in cold water ; but swelling into a gelatinous mass, which is tinged violet by tincture of iodine (presence of a trace of starch only). After maceration in cold water the fluid portion is not precipitated by the addition of rectified spirit (absence of adulteration by soluble gums).
Page 96 - ... macerate the colocynth in the spirit for 4 days, press out the tincture, distil off the spirit, and add to it the extract of aloes...
Page 90 - Then shake briskly, and, having removed the ether, repeat the process twice with 3 fluid drachms of ether, or until a drop of the ether employed leaves on evaporation scarcely any perceptible residue. Lastly, evaporate the mixed ethereal solutions in a capsule. The residue, which consists of nearly pure Quinia, when dry, should weigh not less than 2 grains, and should be readily soluble in dilute sulphuric acid.
Page 27 - Heat the alum in a porcelain dish or other suitable vessel till it liquefies, then raise and continue the heat, not allowing it to exceed 400°, till aqueous vapor ceases to be disengaged, and the salt has lost 47 per cent of its weight.
Page 290 - Dissolve the sulphate of copper in eight fluid ounces of the water, and to the solution add the ammonia until the precipitate first formed is nearly dissolved. Clear the solution by filtration, and then add distilled water, so that the balk may be ten fluid ounces.
Page 146 - Entirely volatilised by a heat under redness, being at the same time decomposed into mercury and oxygen. If this be done in a test-tube, no orange vapours are perceived.
Page 34 - If twenty grains of this salt be dissolved in water, and solution of ammonio-sulphate of magnesia added, a crystalline precipitate falls, which, when well washed upon a filter with solution of ammonia diluted with an equal volume of water, dried, and heated to redness, leaves 16.8 grains.

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