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Format Image Remove constraint Format: Image Rights No Known Copyright Remove constraint Rights: No Known Copyright Subject Insecticides Remove constraint Subject: Insecticides Subject Chemical industry Remove constraint Subject: Chemical industry Subject Corporations Remove constraint Subject: Corporations Subject Rotenone Remove constraint Subject: Rotenone Date 1940 to 1941 Remove constraint Date: <span class='from'>1940</span> to <span class='to'>1941</span>

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    • 1940

    Advertisement for D.H.S. Activator, a trademarked name for Ethylene glycol ether manufactured and sold by the Hercules Powder Company to increase the effectiveness and reduce the manufacturing costs of pyrethrum and…

    • 1940

    Advertisement for D.H.S. Activator, a trademarked name for Ethylene glycol ether manufactured and sold by the Hercules Powder Company to increase the effectiveness and reduce the manufacturing costs of pyrethrum and…