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(574 results)



Display: 20

    • Fiber diagrams

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    • The above photographs are fiber diagrams comparing the fiber distribution and length of fibers in Two Top produced by Pacific Mills Worsted Division with other types of top. No. 1 represents a conventional pick carded and combed rayon top. The...
    • Roll Mill

    • Mills; Gunpowder;
    • "Built in 1836 of stone construction. [Unusual: apparently one level, no underground gearing. Door leads down instead of up. Probably had overhead gearing.]"
    • Roll Mill

    • Mills; Gunpowder;
    • "Built in 1836 of stone construction. [Unusual: apparently one level, no underground gearing. Door leads down instead of up. Probably had overhead gearing.]"
    • View of cross section

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    • This diagram shows a typical surface cross section as it might appear, magnified many thousands of times, under an electron microscope. The surface might be that of a fiber, or of a painted wall, or even wall paper. In Line No. 1, rough soil...
    • Roll Mill

    • Mills; Gunpowder;
    • "This was possibly the second rolling mill in America with iron wheels and was built in 1824. The rolling wheels were made of cast iron, and each weighed 14,300 pounds. These were made by Gouverneur Kemble's West Point Foundry at Cold Spring, New...
    • Roll Mill

    • Mills; Gunpowder;
    • "This was possibly the first rolling mill in America using cast-iron wheels, and was built in 1822. The rolling wheels were made of cast iron, and each weighed 14,300 pounds. These were made by Gouverneur Kemble's West Point Foundry at Cold Spring,...
    • Roll Mill

    • Mills; Gunpowder;
    • "This mill and No. 18 incorporated Lesmok powder containing nitrocellulose. This was very dangerous and the double rear walls were built with peepholes for workmen to watch the wheels for signs of dusting, which indicated that the powder was...
    • DuPont Magazine [April-May 1950]

    • Periodicals; Chemical industry; Pest control; Racing; Dyeing; Farming; Plastics industry;
    • Table of Contents: Annual report 1949; Chemistry on the hoof; No ivy, no itch; Introducing teflon enamels; What's wrong with this picture; Go gly a kytoon; Give a boy a gun, and be safe; Pay-off for Camden; The furious 500; Did you know; Meet Mr....
    • Plant No.2

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    • The Perth Amboy plant of the DuPont Company's Electrochemical Department. Plant No. 2, shown above, makes formaldehyde, paraformaldehyde and hexamethylenetetramine. Plant No. 1, located a few city blocks away, manufactures ceramic colors,...
    • Synthetic lilac perfume

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    • An intermediate step in making synthetic lilac perfume-the distillation of terpineol. The crude terpineol oil is vaporized in a vacuum still, the vapors are purified in a fractionating column, cooled in a condenser and finally the pure terpineol...
    • DuPont Magazine [February 1914]

    • Periodicals; Chemical industry; Explosives; Dynamite;
    • Table of Contents: Avoid Thawing Accidents; The Trouble Duo; Improved Red Cross Dynamite; A Winner: Red Cross Extra 20%; Snow Doesn't Fease the Red Cross Blaster; Word "Danger" on Every Cartridge; A Remarkable Shot with DuPont Straight Dynamite and...
    • Synthetic lilac perfume

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    • An intermediate step in making synthetic lilac perfume-crude terpin hydrate flowing into the large vat where it is filtered and purified. Until the lilac odor was synthesized-one of the outstanding achievements of the chemical laboratory in...
    • Perfume research

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    • About two dozen constituents, besides terpineol, combine to make synthetic lilac perfume. Mr. Theodore Hoffman, director of the DuPont perfume laboratories and an outstanding authority on perfumes, is shown at the scales of his laboratory...
    • Perfume research

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    • Theodore Hoffman, director of the DuPont perfume laboratories and an outstanding authority on perfumes, applies the last test to a bottle of perfume-which depends on the olfactory sense and not on formulas, at the New Brunswick, New Jersey factory...
    • DuPont Magazine [No. 1, 1998]

    • Periodicals; Chemical industry; Diving; Textile industry; Agriculture; Fire fighting; Automobile industry; Bridges;
    • Table of Contents: Depth perception; The eyes have it; All thrill, no chill; In step with a giant; New branches on a growing business; Out of the flying plane, into the fire; Designs that endure; A salute to safety; Piers without peer; Proof...

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