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Postcard from Karl Friedrich Bonhoeffer to Georg Bredig

  • 1929-Jun-21

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Postcard from Karl Friedrich Bonhoeffer (1899-1957) to Georg Bredig (1868-1944) telling him that he will take part in a summer festival and explaining his schedule. On the postcard, Bredig credits Bonhoeffer for his work with hydrogen ions.

Bonhoeffer, along with fellow chemist Paul Harteck (1902 – 1985), discovered the spin isomers of hydrogen, orthohydrogen and parahydrogen. The two were the first to synthesize pure parahydrogen. This letter was written in the same year that Bonhoeffer made this discovery.

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  • 3.5 in. H x 5.6 in. W
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Credit line
  • Courtesy of Science History Institute
Additional credit
  • Translated by Jocelyn R. McDaniel
  • Transcribed by Jocelyn R. McDaniel
Digitization funder
  • Council on Library and Information Resources

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Department
Collection
Series arrangement
  • Series I: Georg Bredig Papers, 1891-1944
  • Series I: Sub-Series I: Georg Bredig Correspondence File, 1891-1944
Physical container
  • Box 1, Folder 14

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Cite as

Bonhoeffer, Karl Friedrich. “Postcard from Karl Friedrich Bonhoeffer to Georg Bredig,” June 21, 1929. Papers of Georg and Max Bredig, Box 1, Folder 14. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/yu2q44k.

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Transcription PDF file

21. VI. 29

[Bredig’s hand: Entdecker der Ionawasserstoff]

Sehr geehrter Herr Professor!

Vielen Dank für die liebenswürdige Zusendung des Programms. Ich werde natürlich mit grossem Vergnügen das Sommerfest mitmachen. Dagegen kann ich erst am 2ten vormittags ankommen, da ich am Montag noch Kolleg habe und die Nacht durchfahren muss. Ich sehe meinen Karlsruher Besuch mit grosser Freude entgegend bin. Mit den ergebensten Grüssen

Ihr
K.F Bonhoeffer

Translation PDF file

21 June 1929

[Bredig’s hand: Inventor of Ion Hydrogen]

Dear Professor,

Thank you for kindly sending me the schedule. Of course, I will be delighted to take part in the summer festival. However, I can only arrive on the morning of the 2nd, as I still have to teach on Monday and then travel through the night. I look forward to my visit in Karlsruhe with great pleasure. Warm regards!

Yours,
K.F. Bonhoeffer

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.