Needle Butte.19th century US expeditions surveys.

Colorado 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.

expeditions surveys needle butte high resolution powell john wesley 1834 1902 author beaman e o elias olcott 1837 1876 photographer expeditions and surveys colorado river colo mexico stereoscopic views needle butte surveys expeditions colorado river robert dennis collection of stereoscopic views 19th century new york public library back of stereoscopic card

1871 - 1873

New York Public Library

http://digitalcollections.nypl.org/

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