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Department Archives Remove constraint Department: Archives Genre Charts, diagrams, etc Remove constraint Genre: Charts, diagrams, etc Date 1943 Remove constraint Date: <span class='single'>1943</span>

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    • 1940s

    Rainbow-colored periodic table of the elements designed in the style of an irregular spiral. Per text accompanying the table, the colors and construction of the table are designed to express the relationship among…

    • circa 1957 (Date attributed to slide)
    • 1943 (Original design)

    Top and perspective views of a graphic representation of the periodic table of chemical elements in the style of space concentric circles in eight planes. This table was originated by G. Haenzel in 1943 and classified…

    • 1937 – 1945 (Original design)
    • circa 1957 (Date attributed to slide)

    Graphic representation of the periodic table of chemical elements constructed as a triangle. This type of table was originated by Henry A. Wagner and Harold Simmons Booth in 1945 after an incomplete drawing by Emil V.…

    • 1943-Aug-18

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1943-Nov-18

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1943-Dec-02

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting “acidimeter” with its…