The chemical pocket-book, or memoranda chemica; arranged in a compendium of chemistry ... with Bergman's table of single elective attractions / as improved by Dr. G. Pearson.

  • Parkinson, James, 1755-1824
Date:
1807
Catalogue details

Licence: Public Domain Mark

Credit: The chemical pocket-book, or memoranda chemica; arranged in a compendium of chemistry ... with Bergman's table of single elective attractions / as improved by Dr. G. Pearson. Source: Wellcome Collection.

    128/394 (page 108)
    Jog with metallic solutions, such as of the acetite of lead, being made to appear, even on the approximation of a solution of sulphuretted hydrogen, or rather the contact of the gas. Their affinity for oxygen is very considerable, and they are all decomposable at certain degrees of heat. They burn with dif- ferent appearances in the flame of alcohol; and the sulphuret of iron inflames in oxygenized muriatic gas, even at the com- mon temperature. The sulphuret of iron, or common pyrites, gives sparks very freely by collision with steel, and is so hard as to cut glass with more facility than flint. The iron pyrites are known from those of copper by their colour being whiter, the latter possessing a yellowish red colour. Vauquelin divides the combinations of metals with sulphur into three orders: 1. Metals and sulphur, or sulphurets; 2. Metallic oxides and sulphur, which are the sulphuretted metallic oxides; 3. Metallic oxides, with sulphur and hy- drogen, which triple combinations he calls metallic hydro- sulphurated oxides. Mr. Hatchett, with Mr. Wiseman, noticed an instance of the daily production of sulphuret of iron in the humid way.— Philos. Trans. 1798. p. 56j. Proust also believes the native pyrites to be formed in the humid way. Dr. Thompson, on the other hand, formed pyrites, and sometimes even in a crystallized state, by bringing a mixture of equal parts of iron filings and sulphur to fusion pretty rapidly.—Thompson’s System of Chemistry. During the formation of sulphurets, either metallic or alka- line, a curious phenomenon appears. On acquiring a mode- rate degree of heat, the mixture suddenly melts, becomes red hot, and glows as though acted on by a bellows. A similar appearance is observable when phosphorus is employed in- stead of sulphur. Mercury unites with sulphur in preference to oxygen, not being able, like zinc, tin, antimony, &c. to combine with sul-