Companion to the latest edition of the British pharmacopoeia : comparing the strength of its various preparations with those of the United States and other foreign pharmacopoeias to which are added non-official preparations and practical hints on prescribing / by Peter Squire.

  • Squire, Peter Wyatt, Sir, 1847-1919.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Companion to the latest edition of the British pharmacopoeia : comparing the strength of its various preparations with those of the United States and other foreign pharmacopoeias to which are added non-official preparations and practical hints on prescribing / by Peter Squire. Source: Wellcome Collection.

    342/480 (page 306)
    HYPOSULPHITE OF SODA. (NaO.SoOs+SHO, or Na2H2S204.4H2O.) Test.—248 grains decolorize 100 grain measures of the volumetric solution of Iodine. INDIGO. (CigHglSrOa, or CgHsNO.) A blue pigment prepared from various species of Indigofera^ Linn. ISINGLASS. The swimming-bladder or sound of various species of Acipenser, Linn., prepared and cut into fine shreds. LITMUS. A blue pigment prepared from various species of Eoccella, DO. LitMUS PAPER, BLUE. Unsized white paper steeped in Tincture of Litmus, and dried by exposure to the air. LITMUS PAPER. EED. Unsized white paper steeped in Tincture of Litmus which has been previ- ously reddened by the addition of a very minute quantity of Sulphuric Acid, and dried by exposure to the air. LITMUS TINCTURE. Take of Litmus in powder, 1 oz. ; Proof Spirit, 10 fl. oz.: macerate for two days in a closed vessel, and filter. OXALIC ACID OF COMMERCE. OXALIC ACID, PURIFIED. (2HO.C4O6 + 4H0, or H2C2O4.2H2O.) Take of Oxalic Acid of Commerce, 1 pound ; boiling Distilled Water, 30 fl. oz.: dissolve, filter the solution, and set it aside to crystallize. Pour off the liquor, and dry the crystals by exposure to the air on filtering-paper placed on porous bricks. Test.—It is entirely dissipated by a heat below 350° OXALATE OF AMMONIA. (2NH4O.C4O6+2HO, or (]SrH4)2. C2O4. H2O.) Take of Purified Oxalic Acid, 1 oz. 1 boiling Distilled Water 8 fl. oz. ; Carbonate of Ammonia, a sufficiency : dissolve the OxaHc Acid in the water, neutralize the solution at a boiling temperature, filter it while still hot, and and set it by that crystals may form as it cools. PLASTER OF PARIS. Native Sulphate of Lime, CaO,S03.+2HO, or CaS04.2H20, deprived of water by heat. PLATINUM BLACK. Platinum in a state of minute division obtained by adding excess of Car- bonate of Soda and some Sugar to solution of Perchloride of Platinum, and boihng till a black precipitate is formed, which is washed and dried. PLATINUM FOIL. RED PRUSSIATE OF POTASH. (KgFeoCisNfi, or KeFegCigNis.) Test.—Its solution in water gives no precipitate with Persulphate of Iron.