Companion to the latest edition of the British pharmacopoeia : comparing the strength of the various preparations with those of the United States and other foreign pharmacopoeias to which are added not official preparations and practical hints on prescribing / by Peter Squire.

  • Squire, Peter.
Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: Companion to the latest edition of the British pharmacopoeia : comparing the strength of the various preparations with those of the United States and other foreign pharmacopoeias to which are added not official preparations and practical hints on prescribing / by Peter Squire. Source: Wellcome Collection.

    401/572 (page 361)
    OXALIC ACID OF COMMERCE. Oxalic Acid (H2C204, 2H20.), not quite pure. OXALATE OF AMMONIUM. ( (NH4)2C204, H20.) Take of Oxalic Acid, 1 oz. ; boiling Distilled Water, 8 fl. oz. Carbonate of Ammonium, a sufficiency: dissolve the Oxalic Acid in the Water, neutralize the solution with the Carbonate of Ammonium at finally a boiling tempera- ture, filter it while still hot, and set it by that crystals may form as it cools. FETEOLEUM SPIRIT. Syn. Benzoline ; Petroleum Ether. A colourless, very volatile, and highly inflammable liquid obtained from Petroleum, and consisting of a mixture of the lower members of the Paraffin or Marsh-gas series of Hydrocarbons. Boiling point 122° to 140° F. (50° to 60° C.) Sp. g. about -670 to -700. PHENOL-PHTHALEIN. Produced by the reaction of Phenol and Phthalic Anhydride. Its Tincture yields an intense red colour with Potash or Soda, hence may be u<=ed as an indicator of the termination of volumetric reactions, especially those with organic acids. PLATINUM BLACK. Platinum in a state of minute division, obtained by adding excess of Car- bonate of Sodium and some Sugar to solution of Perchloride of Platinum, and boiling till a black precipitate is formed, which is washed and dried. PLATINUM FOIL. SUBACETATE OF COPPER OF COMMERCE. Verdigris. ■SULPHATE OF COPPER, ANHYDROUS. (CuS04.) Sulphate of Copper deprived of its water by a heat of 400° F. (204-4° C). Characters.—A yellowish-white powder, which becomes blue when moistened with water. SULPHIDE OF IRON. (FeS.) Prepared by combining its elements in proper proportions by the aid of heat. Small quantities may be produced by applying the end of a rod of iron, heated to whiteness at a blacksmith's forge, to the end of a roll of Sulphur, and allowing the Sulphide of Iron, as it is formed, to run into a vessel of water. SULPHURETTED HYDROGEN. (H2S.) Take of Sulphide of Iron, \ oz.; Water 4 fl. oz. ; Sulphuric Acid, a suffi- ciency : place the Sulphide of Iron and the Water in a gas-bottle closed with a cork perforated by two holes, through one of which passes air-tight a funnel tube of sufficient length to dip into the water, and through the other a tube for giving exit to the gas. Through the former pour from time to time a little of the Acid, so as to develop the Sulphuretted Hydrogen as it may be required. When the gas is employed, either in chemical testing or in the prepara- tion of Acidum Hydrobromicum Dilutum, it should be washed by passing it through a similarly fitted bottle containing water.