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Place California--South Pasadena Remove constraint Place: California--South Pasadena Date 1945 to 1949 Remove constraint Date: <span class='from'>1945</span> to <span class='to'>1949</span>

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    • 1950
    • 1940
    • 1934 – 1935
    • 1946
    • Undated
    • 1949

    A Pasadena garage was the first home of the National Postal Meter Company, founded by Arnold Beckman in 1934. The company soon became National Technical Laboratories, with a focus on pH meters. In 1935, the company…

    • 1940s

    This building at 820 Mission Street was the first built exclusively for National Technical Laboratories in 1940.

    • 1949-Nov

    The ultraviolet Model B was marketed as an easier to use and more affordable alternative to the Beckman DU Spectrophotometer.

    The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company…

    • Bulletin 69-B
    • 1949-Dec

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • 1948 (Winter)

    Photographs of the snow-covered National Technical Laboratories on Mission Street in South Pasadena.

    • 1948

    Shipping department of National Technical Laboratories in South Pasadena.

    • 1948

    Parking lot on the north side of National Technical Laboratories in South Pasadena.

    • 1948

    Northwest parking lot of National Technical Laboratories in South Pasadena.

    • 1948

    View to the west of National Technical Laboratories in South Pasadena.

    • 1948

    Snack bar of National Technical Laboratories in South Pasadena.

    • 1948

    Front entrance of National Technical Laboratories in South Pasadena.

    • Undated
    • 1948
    • 1943

    This building at 820 Mission Street was the first built exclusively for National Technical Laboratories in 1940.

    One photograph bears a photographer's stamp for J. Allen Hawkins on the back, but the other images in…

    • Bulletin 191
    • 1948-Jan

    This questionnaire contains frequently asked questions and common issues with the performance of the IR-2.

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O.…

    • Bulletin 153-B
    • 1947-Nov

    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…

    • Bulletin 91-B
    • 1946

    The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company was still called National Technical Laboratories. Spurred by employee Howard Cary (who had previously been involved in pH meter…

    • Beckman Bulletin 153
    • 1946-May

    The cover of the bulletin includes handwritten notes about printing dates and quantities.

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942,…

    • Dwg. No. CD-2000B
    • 1945-Jan-24

    The diagram is annotated in red and blue ink, indicating first and second position.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…

    • 1945-Feb-14

    Arnold Beckman informs J. H. Rushton that the Model G oxygen meter is ready for testing, but the Model F is not. An order has been received from the Linde Company, but not fulfilled, and an experimental instrument was…