A companion to the British pharmacopœia

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Page 254 - 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 196 - 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 56 - 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 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 270 - 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 22 - ALOE SOCOTRINA. SOCOTRINE ALOES. The inspissated juice of the leaf of one or more undetermined species of Aloe, Linn.
Page 206 - In colourless cubical crystals, with no odour, but a pungent saline taste, readily soluble in water, less soluble in spirit. Its aqueous solution gives a white crystalline precipitate with tartaric acid. When its solution in water is mixed with a little chlorine, chloroform agitated with it, on falling to the bottom, exhibits a red colour.
Page 86 - 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 289 - According to the metrical system the quantities of the substances to be tested are expressed in grammes by weight, whilst the quantities of the test solutions employed • in testing are expressed in cubic centimetres, — the cubic centimetre being the volume of a gramme of distilled water. As the cubic centimetre bears the same relation to the gramme that the grain-measure bears to the grain, the one system may be substituted for the other with no difference in the results, excepting that, by the...
Page 200 - Filter, evaporate till a pellicle forms, and set aside to crystallize; first adding a little acetic acid should the fluid not have a distinctly acid reaction. Drain and dry the crystals on filtering paper without heat.

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