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    • A quarterly devoted to the historical and scientific discussion of the botany, pharmacy, chemistry and the therapeutics of the medicinal plants of North America, their constituents, products and sophistications
    • 1884-Apr – 1887-Jun

    Select plates digitized including drawings of plant specimens, maps illustrating locale of plant specimens as well as magnified illustrations of plant parts.

    • 1909

    Plate IV depicting the effect of antitoxin on the local diphtheritic process with description underneath the plate as follows:

    The figures on the left show the gradual increase of the false membrane from the first to…

    • 1909

    Plate II illustrating in color the effects of phenol gangrene on the finger with description underneath the plate as follows:

    Appearance of a finger four weeks after the application for twenty-four hours of a dilute…

    • 1936-Aug

    This report outlines the colorimetric and electrical ways to determine the pH of a solution and the various kinds of electrodes that can be used with electrical instruments. Beckman concludes that a method using glass…

    • 1937-Dec

    This page of instructions would have been located inside the lid of the pH meter, so that users would be able to read the instructions upon opening its case.

    Arnold Beckman invented his first pH meter in 1934 at the…

    • 1938

    This page of instructions would have been located inside the lid of the pH meter, so that users would be able to read the instructions upon opening its case.

    Arnold Beckman invented his first pH meter in 1934 at the…

    • 1939-Oct

    Written by NTL (the precursor to Beckman Instruments, Inc.), this document outlines new standards for buffer solutions used in pH meters.

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

    • 1944-Oct

    This instruction manual for several Beckman Instruments products was created by the Hanford Site Instrument Department, specifically for use with Beckman instruments used in their facility. Instruments covered in this…

    • 1945

    These instructions for phototube replacement describe some of the inner workings of the first model D/DU spectrophotometer made by National Technical Laboratories in 1945. The phototube being replaced in these…

    • 1945-Dec-01

    A Nearnst glower is a now-obsolete device that uses a cylindrical rod of heated oxides to deliver infrared radiation in instruments used for spectroscopy.

    The Beckman Instruments IR spectrophotometers began as a…

    • 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,…

    • 1946 – 1955

    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 147-A
    • 1946

    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 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 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 206
    • circa 1949

    The Pocket Dosimeter was designed to be a portable radiation monitoring system, carried by people to protect themselves against gamma and x-ray exposure.

    • 1949-Mar-17

    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 206-B
    • 1949-Jul-12

    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…