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International media Interoperability Framework
IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more.
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  • Slide rule, Keuffel & Esser 4081-3
  • Slide rule, Keuffel & Esser 4081-3
  • Keuffel & Esser Log Log Duplex Decitrig Braille Slide Rule, Model 4081-3 , Back View
  • Slide rule, Keuffel & Esser 4081-3