Skip to Content
You searched for
Search
Genre Manuscripts Remove constraint Genre: Manuscripts Genre Charts, diagrams, etc Remove constraint Genre: Charts, diagrams, etc

Search Constraints

Search Results

    • 1956

    Although the author is unknown, these instructions were most likely written by a Beckman Instruments employee. This glass electrode was used in Beckman pH meters.

    Arnold Beckman invented his first pH meter in 1934 at…

    • 1930s

    The McLeod Gauge measures very low pressures of gasses. Its presence in this collection indicates that it was used during the production of Beckman Instruments' early pH meters. These calibrations may have been written…

    • 1934-Mar-22

    These calibrations and the diagram were done by W. E. Baier, Research Manager of the California Fruit Growers' Exchange. The McLeod Gauge measures very low pressures of gasses. Its presence in this collection indicates…