About Magazine Podcasts Events
Museum Hours:Closed until March 8, 2025

Digital Collections

Manuscripts, Charts, diagrams, etc

Calibration of a McLeod Gauge

  • 1930s

Rights

Unknown Rightsholder

Download selected image

PDFSmall JPG1200 x 1536px — 253 KBFull-sized JPG2736 x 3501px — 1.4 MBOriginal fileTIFF — 2736 x 3501px — 27.5 MB
View
Unknown
Rightsholder
PDF
Download PDF

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 by W. E. Baier, Research Manager of the California Fruit Growers' Exchange, as there are other calibrations of the McLeod gauge written by him in the same folder as this document.

Format
Genre
Extent
  • 8.5 in. W x 11 in. L
Language
Subject
Rights In Copyright - Rights-holder(s) Unlocatable or Unidentifiable
Credit line
  • Courtesy of Science History Institute

Institutional location

Department
Collection
Series arrangement
  • Series II. Business Activities Files
  • Sub-series 1. Correspondence
Physical container
  • Box 14, Folder 8

View collection guide View in library catalog

Related Items

Cite as

“Calibration of a McLeod Gauge,” 1930–1939. Beckman Historical Collection, Box 14, Folder 8. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/vx021f146.

  Export citation (RIS) ?

This citation is automatically generated and may contain errors.

The Science History Institute recognizes there are materials in our collections that may be offensive or harmful, containing racist, sexist, Eurocentric, ableist, or homophobic language or depictions. The history of science is not exempt from beliefs or practices harmful to traditionally marginalized groups. The Institute is engaged in ongoing efforts to responsibly present and address the evidence of oppression and injustice inextricable from the history of science. If you would like to learn more about our ongoing efforts or if you encounter harmful, inaccurate, or insufficient descriptions, please contact us at digital@sciencehistory.org.