Eroded sand stones, Monument Park.19th century US expeditions surveys.

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 geographical surveys west of the 100th meridian u s sand stones monument park jackson william henry 1843 1942 photographer e h t anthony firm publisher expeditions and surveys stereoscopic views sand stones monument park surveys expeditions robert dennis collection of stereoscopic views 19th century ultra high resolution high resolution new york public library back of stereoscopic card

1870 - 1870

New York Public Library

https://digitalcollections.nypl.org/

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