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• Identified! [Man preparing a "smoked paper" to be used in a seismograph, probably at Georgetown University]

  • Uploaded by: The Library of Congress
  • License: No known copyright restrictions
  • 12 comments
  • 34 favorites
  • 19,147 views
  • Date taken: 1924
  • Date uploaded: 2022-05-06
  • Tags: libraryofcongress, dc:identifier=httphdllocgovlocpnphec32544
  • Visibility: public