About Magazine Podcasts Events
Museum Hours:Wednesday–Saturday, 10AM–5PM

Digital Collections

Advertisements, Photographs

Letter from Elektrizitäts Gesellschaft Gebr. Ruhstrat to Georg Bredig

  • 1905-Nov-03

Rights

Public Domain

Download all 3 images

PDFZIPof full-sized JPGs

Download selected image

Small JPG1200 x 1502px — 237 KBLarge JPG2880 x 3606px — 1.2 MBFull-sized JPG5778 x 7234px — 4.4 MBOriginal fileTIFF — 5778 x 7234px — 120 MB
View
Public
Domain
PDF
Download PDF
ZIP
of full-sized JPGs
Download ZIP

Letter, price list, and photograph of from laboratory equipment manufacturer, Gebr. Ruhstrat AG. The company was founded in 1888 by brothers Adolf and Ernst Ruhstrat. In 1894, Gebr. Ruhstrat AG, Walther Nernst (1864-1941), and the University of Göttingen collaborated to create the first adjustable sliding resistor. The company is also credited with developing the first resistance-heated high-temperature furnace.

Property Value
Creator of work
Place of creation
Format
Genre
Extent
  • 3 pages
  • 11.25 in. H x 9 in. W
  • 4 in. H x 4.5 in. W
Language
Subject
Rights Public Domain Mark 1.0
Credit line
  • Courtesy of Science History Institute
Digitization funder
  • Council on Library and Information Resources

Institutional location

Department
Collection
Series arrangement
  • Series I – Georg Bredig Papers, 1891-1944
  • Series I: Sub-Series I. Georg Bredig Subject File, 1900-1944
Physical container
  • Box 3, Folder 3

View collection guide View in library catalog

Related Items

Cite as

Ruhstrat, Gebr. AG. “Letter from Elektrizitäts Gesellschaft Gebr. Ruhstrat to Georg Bredig,” November 3, 1905. Papers of Georg and Max Bredig, Box 3, Folder 3. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/zk7xjgi.

  Export citation (RIS) ?

This citation is automatically generated and may contain errors.

Rights

Public Domain

Download selected image

Small JPG1200 x 1516px — 253 KBLarge JPG2880 x 3638px — 1.3 MBFull-sized JPG5792 x 7317px — 5.1 MBOriginal fileTIFF — 5792 x 7317px — 121 MB

Rights

Public Domain

Download selected image

Small JPG1200 x 1506px — 310 KBLarge JPG2880 x 3615px — 1.7 MBFull-sized JPG5763 x 7233px — 6.1 MBOriginal fileTIFF — 5763 x 7233px — 119 MB

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.