Formation near Mammoth Springs, Yellowstone National Park.

Wyoming 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.

wyoming yellowstone national park national parks reserves mammoth springs high resolution haynes f jay frank jay 1853 1921 photographer national parks and reserves stereoscopic views formation mammoth springs yellowstone park united states robert dennis collection of stereoscopic views 19th century images of yellowstone national park new york public library back of stereoscopic card

1881 - 1888

New York Public Library

http://digitalcollections.nypl.org/

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