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Título: Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683. Artist: Unknown
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Checking the quality of saltpetre (nitre, potassium nitrate, or KN03), 1683. Saltpetre is the principal ingredient in gunpowder, and is still used in the preservation of some foods. In medicine it was used internally as a diuretic, but now is only used externally for a number of conditions, such as asthma. From a 1683 English edition of Beschreibung allerfurnemisten mineralischen Ertzt by Lazarus Ercker. (Prague, 1574).
Crédito: Album / Oxford Science Archive / Heritage Images
Tamaño imagen: 4645 × 3760 px | 50.0 MB
Tamaño impresión: 39.3 × 31.8 cm | 1828.7 × 1480.3 in (300 dpi)