Manufacture of saltpetre for use in gunpowder

Manufacture of saltpetre for use in gunpowder

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Credit: SCIENCE PHOTO LIBRARY

Caption: Saltpetre manufacture. Engraving of saltpetre (potassium nitrate) manufacture in the 16th century. Saltpetre, a component of gunpowder, was made by first dissolving the encrustations on the walls of stables and cellars. The solution was then boiled over a furnace (at lower right) to concentrate it. The solution was then placed in open pans (upper frame) and the saltpetre crystallised out as it cooled. Image taken from a book by Lazarus Ercker, Beschreibung allerfurnemsten mineralischen Ertzt (1580).

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Keywords: 16th c., 16th cent, apparatus, chemical, chemistry, crystallisation, equipment, ercker, gunpowder manufacture, historical, history, history of science, lazarus' diagrams, manufacture, potassium nitrate, saltpetre manufacture, technology

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