General view of employee Emily Port inserting plugs and bridge wires into the shells of electric blasting caps manufactured at the Hercules Powder Company plant in Port Ewen, New York. Formed in 1912 as part of an anti-trust settlement with DuPont, the Hercules Powder Company (later Hercules Inc.) specialized in the manufacture of explosives and smokeless powders. The company's Port Ewen plant produced a range of special detonators designed for military use, as well as construction jobs that required blasts of dynamite, such as the clearing of quarries, mines, and tunnels.
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Hercules Incorporated. “Insertion of Plug and Bridge Wire into Electric Blasting Caps,” February 8, 1955. Photographs from the Records & Ephemera of Hercules Incorporated, Box 2, Folder 37. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/8623hz248.
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