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.

Date Made: after 18761834-18441870s

Maker: Duboscq, Jules

Location: Currently not on view

Place Made: France: Île-de-France, Paris

See more items in: Medicine and Science: Physical Sciences, Sputnik, Science & Mathematics


Exhibition Location:

Credit Line: U.S. Military Academy

Data Source: National Museum of American History

Id Number: PH.315416Catalog Number: 315416Accession Number: 217544

Object Name: projector

Physical Description: brass (overall material)Measurements: overall: 28 in x 13 5/8 in x 13 5/8 in; 71.12 cm x 34.544 cm x 34.544 cmoverall: 27 3/4 in x 13 in x 13 in; 70.485 cm x 33.02 cm x 33.02 cm


Record Id: nmah_1184287

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