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![Light House, Farallone [sic] Islands, Pacific Ocean.](https://cache.getarchive.net/Prod/thumb/cdn25/L3Bob3RvLzE4NjcvMDEvMDEvbGlnaHQtaG91c2UtZmFyYWxsb25lLXNpYy1pc2xhbmRzLXBhY2lmaWMtb2NlYW4tYTJiMWQ1LTY0MC5qcGc%3D/40/20/webp "Light House, Farallone [sic] Islands, Pacific Ocean.")
Light House, Mare Island. Sterescope Cards NYPL Collection.
Summary
California Stereoscopic card.
Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who assembled it over a period of more than six decades, Robert N. Dennis (1900-1983).
Stereographs consist of two nearly identical photographs or photomechanical prints, paired to produce the illusion of a single three-dimensional image, usually when viewed through a stereoscope. Stereographs were produced from the 1850s to the 1940s, with the bulk between 1870 and 1920.
The collection/dataset uses media from the world's largest public domain source Picryl.com. It is made in two steps - first manually picked, and then, found semi-automatically, with aid of image recognition, it comprises of more than 5,000 images. Everything in the collection is in the public domain, so there is no limitation on the dataset usage - educational, scientific, or commercial.
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