Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date ca. 1914 Country of Origin United States of America Type INSTRUMENTS-Computers, General Purpose Manufacturer R. J. Hoffman Standard Aeronautical Co.
 Physical Description One "Triple-Slide" calculator with solid back, paper and cardboard slides, and a plastic triangle indicator. Dimensions 3-D (Main Component): 35.1 × 29.7 × 0.6cm (13 13/16 × 11 11/16 × 1/4 in.)
 Materials Wood
Cardboard
Fabric
Paper
Ink
Adhesive
Plastic
Aluminum
Copper Alloy
 Inventory Number A19350008000 Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.