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    • Badische Anilin- & Soda-Fabrik one hundred Mark voucher

    This Hundert Mark Gutschein, or one hundred Mark voucher, was issued by Badische Anilin- & Soda-Fabrik. Styled after a banknote, the frontside includes an embossed stamp with the backside outlining the terms of the…

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    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 instrument kicked off…

    • Shades on Feathers
    • Teintures sur Plumes

    Sample book with dyeing instructions and an 18-section foldout containing 143 dyed feathers.

    • Fashion Shades
    • Couleurs Mode
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    Sample book with dyeing instructions and 32 mounted fabric samples.

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    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…

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    This mailer, sent to Beckman shareholders, was a reprint from a company publication and explained the significance of the pH meter.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from…

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    This glass electrode was first used in Beckman pH meters and later other instruments.

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

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    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…

    • Beckman Reprint R-24
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    The paper, distributed as a reprint from Beckman Instruments, described the IR-3 spectrophotometer. It was originally presented before the Symposium on Molecular Structure and Spectroscopy, held in Columbus, Ohio at…

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    Two lists are included: one identifies companies, the second includes instrument serial numbers and shipping dates. Both documents are copies, and (per a note by Pat Ashton) the detailed list does not mention…

    • Bulletin 110B
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    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…

    • Instructions No. 91
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    This undated draft is handwritten and hand-drawn on yellow paper.

    The first Beckman Instruments DU Spectrophotometer was developed in 1940, when the company was still called National Technical Laboratories. Spurred by…

    • Bulletin 419
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    Instruction manual for an instrument designed to record levels of oxidants in the atmosphere. Measuring oxidants is one way to quantify air pollution. Photochemical oxidants are air pollutants which form when air…

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    Though the instruction manual is undated, details such as the November 1956 drawing dates provide clues about creation and publication dates.

    Beckman Instruments' analog computers were being produced by their Berkeley…

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    The second side of the poster has been cropped into three parts for ease of reading. These particular instruments were manufactured by the E. Vernon Hill Company based in Chicago.

    Psychrometers, also known as…

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    This account of Howard Cary's life covers the period from his birth to his initial contact with National Technology Laboratories and brief discussion of his later involvement with pH meter development. He devotes a fair…

    • Personal Recollections of Arnold O. Beckman
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    The account focuses on the early days of Beckman's entrepreneurial endeavors, from Robert Millikan referring I. H. Lyons to Beckman for assistance with National Postal Meter Company inks through the renting of a new…

  1. Contains a listing of available benzo color dyes.

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    A cuvette is a clear container for holding liquid samples, usually for use in a spectrophotometer or other instrument. This one is designed specifically for use in blood gas analysis.