Experiments and observations on the atomic theory, and electrical phenomena / By William Higgins.

  • Higgins, William, 1763-1825.
Date:
1814
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations on the atomic theory, and electrical phenomena / By William Higgins. Source: Wellcome Collection.

    111/194 (page 101)
    The foregoing experiment was repeated, and water was used to depress the quick- silver, in order to obtain the ether and sulphur free from mercurial globules, which is almost impossible. The liquid was eva- porated to dryness, and then exposed to heat sufficient to expel the sulphur; a dark brown residuum remained, which formed a kind of varnish on the bottom of the saucer, in which the experiment was made. The heat applied to produce this effect was about 700° of Fahrenheit. When a small portion of this varnish was collected, it burned with some difficulty on red hot iron, and a minute quantity of grey ashes was left. Some ether was passed up into a tube filled with mercury ; about thirty times its vards > yet the ether was not sufficiently saturated with it ; sulphuretted hydrogen was then sent up in as small quantity as possible at a time: some sulphur was deposited on the surface of the sulphurous ether. bulk of sulphurous gas was after\ introduced ; the whole was absorbed