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.

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    k 1 r (m K i & , m— **2 L 4 j acidity it meets in the fiomach ; but that its purgative power is uncertain, for fometimes it has not the lead effect * of that kind. As it is a mere infipid earth, he rationally concludes it to be a purgative only when converted into a fort of neutral fait by an acid in the ftomach, and that its effedt is therefore proportional to the quantity of this acid. Although magnefia appears from this hiftory of it to be a very innocent medicine ; yet, having obferved, that feme hypochondriacs who ufed it fre¬ quently, were fubjedt to flatulencies and fpafms, he leans to have fufpedted it of feme noxious quality. The circum* fiances however which gave rife to his fufpicion, may very poffibly have pto-» >