Skip to Content
You searched for
Search
Format Text Remove constraint Format: Text Rights Public Domain Mark 1.0 Remove constraint Rights: Public Domain Mark 1.0 Subject Scientific apparatus and instruments Remove constraint Subject: Scientific apparatus and instruments

Search Constraints

Search Results

    • 1952-Apr-29

    U.S. Patent 2,594,740, filed on behalf of Lee de Forest and William A. Rhodes, describes a device for amplifying the intensity of radiation.

    Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum…

    • 1949-Mar-08

    Patent #2,463,743 for a hydrogen tube designed by H. Howard Cary and Warren Baxter during their time at National Technical Labs, a precursor to Beckman Instruments. This tube was designed for use in UV…

    • 1945-Feb-08

    Letter regarding the extension of the military contract for Beckman Instruments' Pauling Oxygen Meter development. This letter also mentions the possibility of using the instrument inside oxygen tents.

    Developed from a…

    • 1945-Feb-06

    In this letter, Dr. Prentiss inquires about the possibility of combining a moisture detector and an oxygen meter, presumably for use in submarines. At the time, Dr. Spencer S. Prentiss was working for the National…

    • 1945-Feb-06

    Letter inquiring about the price and delivery of model P and A Pauling Oxygen Meters for use by the National Defense Research Committee. This letter was originally sent to Dr. Beckman with another letter from Spencer…

    • 1945-Aug-30

    Letter summarizes the final report produced by testing the Pauling Oxygen Meter at the Army Medical Center. The final recommendation of the report is that this oxygen meter should not be standardized for use by the U.S.…

    • 1945-May-29

    Letter regarding the possible development of an aviation model of the Pauling Oxygen Meter for the Bureau of Aeronautics.

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’…

    • 1945-Sep-26

    This letter to Dr. Spencer S. Prentiss of the National Defense Research Committee describes the results of the clinical trial of the Pauling Oxygen Meter by the United States Army. The Army decided not to standardize…

    • 1945-Feb-20

    Request from the National Defense Research Committee for a Model L Pauling Oxygen Meter to test at high altitudes in airplanes.

    Developed from a Linus Pauling design during WWII, the technology behind Beckman…

    • 1945-May-24

    In this letter, Churchill confirms that the National Defense Research Committee (NDRC) has granted Beckman permission to discuss the Pauling Oxygen Meter at an American Chemical Society meeting.

    • 1944-Apr-12

    Letter regarding specifications for Pauling Oxygen Meter for use in British military aircraft.

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up…

    • 1944-Dec-15

    Letter in which Arnold Beckman's request to have the Pauling Oxygen Meter project declassified is denied.

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers…

    • 1944-Jul-19

    Letter regarding an inquiry from the United States War Department about the sensitivity of Pauling Oxygen Meter.

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen…

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Burette No. 2. Burette with 3 way stopcock. 50 ml graduated in 1/10th ml.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Burette No. 3. Burette with bulb and 3 way stopcock. 0-50 ml bulb capacity, 50-100 ml graduated in 1/10th ml.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    200 ml. Distillation Flask. Round bottom. Largely used in the distillation of aromatic hydrocarbons and other organic chemical…

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Volumetric Flasks. Flat bottom, glass-stoppered and unstoppered.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Burette No. 1. Burette with funnel top, 50 ml in 1/10 ml.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Burette No. 4. Burette with bulb and 3 way stopcock, 0-75 ml bulb capacity, 75-100 graduated in 1/10th ml.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Mohr Pipettes. Invented by Karl Friedrich Mohr.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    DuPont Nitrometer. Used to measure and collect nitrogen from a chemical reaction.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Nitrometer attachments: reservoir bulb, manifold, and support used on universal tube.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Nitrometer, general assembly of parts.

    • 1922

    From Manufacturing Chemists' Association Catalog for Standard Laboratory Apparatus, Part 1.

    Nitrometers, reaction bulb and compensating tube.