The student's chemical pocket companion / by W. S. Jacobs, M.D.

  • Jacobs, William Stephen, 1770-1843.
Date:
1807
Catalogue details

Licence: Public Domain Mark

Credit: The student's chemical pocket companion / by W. S. Jacobs, M.D. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    [ 19] MINERAL ALKALI. Natron or Soda, is found in a native state, in Egypt, but is generally' obtained from the ashes of marine plants. It is supposed to consist of nitrogen and magnesia : it ef- floresces in the air; \\ hen pure it is less caustic than potash, and better for the pur- pose of making glass ; contains in 100 parts, 16 acid,# 20 alkali, and 64 of water. Alkalies combine easily with sulphur: If pure liquid alkali be digested upon sul- phur, the mixture becomes reddish^ and is then called liver of sulphur; a foetid gas, called hepatic gas, is disengaged. This hepar sulphuris, or liver of sulphur, dis- solves metals, even gold itself Vegetable and mineral alkalies, have the property of forming glass with silex, and not being volatilized by heat. AMMONIAC, Or the volatile alkali, is composed of hy- drogen and nitrogen, in the proportion of 193 of the former, and 807 of the latter, in the 1000: volatile alkali is usually obtain- ed by distilling animal substances, as hoofs, horns, bones, he. this product is contami