A companion to the British pharmacopœia

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Page 271 - Four fluid ounces with 30 grain-measures of the volumetric solution of nitrate of silver exposed for twenty-four hours to bright light, and then decanted from the black powder which has formed, undergoes no further change when again exposed to light with more of the test.
Page 212 - Macerate the ergot for forty-eight hours in fifteen fluid ounces of the spirit, in a closed vessel, agitating occasionally ; then transfer to a percolator, and, when the fluid ceases to pass, continue the percolation with the remaining five ounces of spirit.
Page 138 - A fine greyish-black powder, strongly attracted by the magnet, and exhibiting metallic streaks when rubbed with firm pressure in a mortar.
Page 62 - Mix the nitric acid with three 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 afterwards decant the solution from any insoluble matter that may be present.
Page 193 - 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 164 - The aqueous solution strikes a deep blue colour with starch. It sublimes without leaving any residue, and the portion that first comes over does not include any slender colourless prisms emitting a pungent odour.
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 308 - Ammonia - - 5 fluid ounces Put three fluid ounces of the ammonia into a bottle, and conduct into this a stream of sulphuretted hydrogen so long as the gas continues to be absorbed ; then add the remainder of the ammonia, and transfer the solution to a green-glass bottle furnished with a well-ground stopper.
Page 288 - 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 37 - 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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