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  2. File:Topographic map of Greenland bedrock.jpg - Wikipedia

    en.wikipedia.org/wiki/File:Topographic_map_of...

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  3. Confederate Powderworks - Wikipedia

    en.wikipedia.org/wiki/Confederate_Powderworks

    More than 2.75 million pounds of first-quality gunpowder (a majority of the powder used by the Confederacy) were produced before its closure in 1865. [5] By comparison, Union gunpowder manufacture was distributed among many mills, with the larger Hazard Powder Company of Connecticut producing 40% of the annual production of 8.4 million pounds. [6]

  4. Littleton gunpowder works - Wikipedia

    en.wikipedia.org/wiki/Littleton_gunpowder_works

    Littleton gunpowder works between Winford and Chew Magna in the English county of Somerset, started gunpowder production around 1650 and continued until approximately 1820. [6] It is a listed as a scheduled monument. [1] The powder mill opened around 1740 following the expansion of the port in Bristol and increased availability of saltpetre ...

  5. Hazard Powder Company - Wikipedia

    en.wikipedia.org/wiki/Hazard_Powder_Company

    The Hazard Powder Company is a former American manufacturer of gunpowder and explosives. It was located in Hazardville within the town of Enfield, Connecticut . Powder mill wreckage, c. 1906 Powder Hollow, c. 1910 School Street, looking north, c. 1910 Child laborers in a tobacco shed at Hawthorn Farm in Hazardville, 1917.

  6. Historiography of gunpowder and gun transmission - Wikipedia

    en.wikipedia.org/wiki/Historiography_of...

    The earliest gunpowder recipe and primitive weaponry date to China's Song dynasty and the oldest extant guns appear in the Mongol-led Yuan dynasty of China. However, historian Tonio Andrade notes that there is a surprising scarcity of reliable evidence of firearms in Iran or Central Asia prior to the late 14th century.

  7. Rock flour - Wikipedia

    en.wikipedia.org/wiki/Rock_flour

    Rock flour from glacial melt enters Lake Louise, Canada Rock flour intensifies the water's hue at Hokitika Gorge on the West Coast of New Zealand. Rock flour, or glacial flour, consists of fine-grained, silt-sized particles of rock, generated by mechanical grinding of bedrock by glacial erosion or by artificial grinding to a similar size.

  8. Drilling and blasting - Wikipedia

    en.wikipedia.org/wiki/Drilling_and_blasting

    One was replacing the iron wire, by which the passage for the gunpowder is formed, with one of copper, to eliminate sparking that could ignite the powder prematurely. Another was the use of a safety fuse. This consisted of small train of gunpowder inserted in a water-proof cord, which burns at a steady and uniform rate.

  9. Gunpowder artillery in the Middle Ages - Wikipedia

    en.wikipedia.org/wiki/Gunpowder_artillery_in_the...

    Gunpowder artillery in the Middle Ages primarily consisted of the introduction of the cannon, large tubular firearms designed to fire a heavy projectile over a long distance. Guns, bombs, rockets and cannons were first invented in China during the Han and Song dynasties and then later spread to Europe and the Middle East during the period.