- Instruments of this sort, which projected the image of objects placed on them, came into use in the second half of the nineteenth century. The “J. Duboscq / à Paris / No. 54” inscription on this example refers to Jules Duboscq, an important scientific instrument maker in Paris.
- This form came to be known, in the twentieth century, as a viewgraph or an overhead projector.
- Ref: J. Duboscq, “Appareil pour la projection des corps placés horizontalement,” Journal de Physique Theorique et Appliquee 5 (1876): 216-218.
- Debbie Griggs, “Projection Apparatus for Science in Late Nineteenth Century America,” Rittenhouse 7 (1992): 9-15.
- Currently not on view
- Object Name
- date made
- after 1876
- Duboscq, Jules
- Place Made
- France: Île-de-France, Paris
- Physical Description
- brass (overall material)
- overall: 28 in x 13 5/8 in x 13 5/8 in; 71.12 cm x 34.544 cm x 34.544 cm
- overall: 27 3/4 in x 13 in x 13 in; 70.485 cm x 33.02 cm x 33.02 cm
- ID Number
- catalog number
- accession number
- Credit Line
- U.S. Military Academy
- Data Source
- National Museum of American History
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