A practical treatise on the use and application of chemical tests. With concise directions for analyzing metallic ores, earths, metals, soils, manures, and mineral waters. Illustrated by experiments / By Fredrick Accum.

  • Accum, Friedrich Christian, 1769-1838.
Date:
1820
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on the use and application of chemical tests. With concise directions for analyzing metallic ores, earths, metals, soils, manures, and mineral waters. Illustrated by experiments / By Fredrick Accum. Source: Wellcome Collection.

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    occasioned by lead suffers no such changes; it is soluble in about twenty-two parts of boiling water, and in dilute nitric acid. It is also employed for discovering am- monia when in a disengaged state ; a glass rod or other substance moistened with this acid, and held in the atmosphere of ammo- niacal gas, becomes immediately surrounded by dense white clouds of muriate of ammo- nia. It is likewise an useful auxiliary agent for ascertaining the presence of oxide of manganese in mineral substances 5. be- cause it produces with it chlorine gas. Sup- pose a mineral be presented to us, and we wish to know whether it contains a notable quantity of oxide of manganese; we may proceed in the following manner : Ist, Re- duce the mineral to powder, pour upon it muriatic acid, and apply a moderate heat. If chlorine gas be disengaged in abundance, the mineral is chiefly manganese. 2nd, To be certain of this, melt a little borax or soda in a platina spoon, add to it a little of the ore, and keep it melted by the interior flame