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.

    10/136 (page 8)
    I ployed the bitter faline liquor called bittern, which remains in the pans after .the evaporation of iea~wrater. But, as that liquor is not always eanly pro¬ cured, I afterwards made ufe of a fait called Epfom fait, which is feparated from the bittern by cryftallization, and is evidently compofed of magnefia and the vitriolic acid. There is likewife a fpurious kind of Glauber fait, which yields plenty of mag¬ nefia, and feems to be no other than Epfom fait of fea-water reduced to cryflals of a larger fize. And com-; mon fait al'fo affords a fmall quantity o* this powder ; becaufe, being feparatea from the bittern by one hafty cryftal lization only, it neceffarily contains : portion of that liquor. i