American Treasures of the Library of Congress: Reason

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Stereoscopic Innovation

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John Stull's invention
Prints & Photographs Division (125.10a)

John Stull of Philadelphia patented this unusual stereo viewing case on February 27, 1855. Stull claimed that his invention would "preserve at all times a perfect parallelism between that part of the case containing the lenses and the part which contains the figures, so that a perfect stereoscope is formed..." When the case's butterfly hinges were closed, the flat case could be conveniently carried in one's pocket.

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