Advertisement for flotation (also known as frothing) agents, including pine oil and rosin amine, manufactured and sold by the Hercules Powder Company. Formed in 1912 as part of an anti-trust settlement with DuPont, the Hercules Powder Company (later Hercules Inc.) initially specialized in the manufacture of explosives and smokeless powders and subsequently diversified its business to encompass a variety of industrial products, including pine and paper chemicals, synthetics, pigments, polymers, and cellulose.
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Hercules Incorporated. “Use These ‘Agents’ for Best Recoveries.” 1952 Hercules Advertisements, 1952. Records of Hercules Incorporated, Volume 1952. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/73666534s.
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