Volume 1

The chemical pocket book, or Memoranda chemica, arranged in a compendium of chemistry / By James Parkinson, Hoxton.

  • Parkinson, James, 1755-1824.
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: The chemical pocket book, or Memoranda chemica, arranged in a compendium of chemistry / By James Parkinson, Hoxton. Source: Wellcome Collection.

    71/424 (page 47)
    phosphorescent, and is called Baldwin’s phosphorus. The fixed alkalies and barytes precipitate the lime. Sulphuric acid unites with the lime, and disengages the nitric acid. 100 parts contain 43 of acid, 32 of lime, 25 water of crystallization. Nitrate of Ammonia, is formed either by the combina- tion of the nitric acid gas with ammonial gas, or by adding nitre to a saturated solution of sulphate of ammonia, which evaporated twice at about 250°, deposites sulphate of pot-ash in crystals, and leaves a solution of nitrate of ammoniac, which at 212° forms beautiful flexile needle-like crystals, or larger crystals in six-sided prisms, terminated with long six- sided pyramids, of a cooling but acrid taste. Exposed to the fire, it fuses, dries, forms a vivid flame, and detonates in a temperature of 600°, with considerable noise. 100 parts con- tain 46 of acid, 40 of ammonia, and 14 of water. It is from this salt, by decomposition by heat, that the nitrous oxide is generally obtained. Its composition varies, with the degree, and the management of the heat employed in its evaporation. Nitrate of Magnesia is found in decayed walls, &c. It forms tetrahedral columnar crystals, with obliquely trun- cated ends, which taste acrid and bitter, are deliquescent and readily soluble, either in water or spirit of wine. It is decom- pounded by lime, barytes, and fixed alkalies, and by the sulphuric and fluoric acids. In 100 parts are 36' of acid, 27 of magnesia, and 37 of water. Nitrate of Ammonia and Magnesia is best formed by mixing a solution of the tw'O nitrates. It forms a salt of a sharp, bitter, and ammonial taste, which crystallizes in fine needle-like prisms. Nitrate of Glucinf. is obtained in a pulverulent form, and has a sweetish taste. It fuses readily, and is very soluble in water. Nitrate of Alumine forms in thin ductile plates, which are deliquescent, and give an astringent taste. In the fire they swell, and are decompounded, losing their oxygen. Nitrate of Zircon forms in small silky needle-like