General view of a continuous denier meter used to measure the denier, or thickness, of filaments during the early stages of synthetic fiber production and research at DuPont. The spool of yarn to be measured is visible on the left-hand side of the photograph, while a measuring cell sits in an electrolyte solution at the center of the apparatus. A yarn windup is situated on top of the device on the right, which continuously recorded the thickness of the filament to check for consistency. The photograph is labeled "Figure 5," indicating that it was used in a report or publication.
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“Continuous Denier Meter Used in Production of Synthetic Fibers,” March 1947. Joseph X. Labovsky Collection of Nylon Photographs and Ephemera, Box 3. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/v405s9450.
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