Experiments upon magnesia alba, quick-lime and other alcaline substances / by Joseph Black ; To which is annexed, an essay on the cold produced by evaporating fluids, and some other means of producing cold; by William Cullen.

  • Black, Joseph, 1728-1799.
Date:
1777
Catalogue details

Licence: Public Domain Mark

Credit: Experiments upon magnesia alba, quick-lime and other alcaline substances / by Joseph Black ; To which is annexed, an essay on the cold produced by evaporating fluids, and some other means of producing cold; by William Cullen. Source: Wellcome Collection.

    5/136 (page 3)
    « v ,' . V fufed mafs which attracts water ftrong- ly, and becomes fluid again when ex~ pofed to the open air. To this liquor the workmen have given the name of the mother of nitre ; and Hoffman, finding it compofed of i the magnefta united to an acid, obtained a reparation of thefe, either by expos¬ ing the compound to a ftrong fire in which the acid was diflipated, and the magnefta remained behind, or by the addition of an alkali which attracted / .V the acid to itfelf: And this laft method * * * he recommends as the beft. He like- wife makes an inquiry into the nature and virtues of the powder thus prepar¬ ed ; and obferves, that it is an abforb- ent earth which joins readily with all acids, and muft neceffarily dellroy any A 2.