Trouve's auxanoscope for projecting medals, drawings and photographs on to a screen. The light was an incandescent electric lamp powered by four bichromate cells. From Cassell's Family Magazine, London, 1888.

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Size: 4862px × 4314px
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Photo credit: © Universal History Archive/Universal Images Group/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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