HAGLEY MUSEUM AND ARCHIVE / SCIENCE PHOTO LIBRARY HAGLEY MUSEUM AND ARCHIVE / SCIENCE PHOTO LIBRARY
Gunpowder ingredients. Worker displaying the raw materials used for the production of gunpowder (also known as blasting powder or black powder). These ingredients (charcoal, sulphur, and sodium nitrate) are relatively inert when unmixed. Sodium nitrate replaced saltpetre as an ingredient, an improvement developed in 1857 by Lammot du Pont, grandson of the founder of the DuPont Company. This site is part of the DuPont Belin factory, near Scranton, Pennsylvania, USA. This image dates from around the 1940s.
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