Skip to main content Skip to main navigation
There are restrictions for re-using this image. For more information, visit the Smithsonian's Terms of Use page .
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.
View manifest View in Mirador Viewer
  • K&E Thacher cylindrical slide rule, Model 4012, front with case.
  • K&E Thacher cylindrical slide rule, Model 4012, back with case.
  • K&E Thacher cylindrical slide rule, Model 4012, detail of case.
  • K&E Thacher cylindrical slide rule, Model 4012, detail of front.
  • K&E Thacher cylindrical slide rule, Model 4012, detail of back.
  • Thacher cylindrical slide rule, Keuffel and Esser 4012.
  • K&E Thacher cylindrical slide rule, Model 4012, back.
  • K&E Thacher cylindrical slide rule, Model 4012, detail of front.
  • K&E Thacher cylindrical slide rule, Model 4012, back with case.
  • K&E Thacher cylindrical slide rule, Model 4012, detail of case.