Looking down the glen from the Devil's Den.

Pennsylvania 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.

pennsylvania gettysburg pa soldiers national cemetery gettysburg pa devil s den high resolution weaver p s photographer weaver w h photographer stereoscopic views glen devil united states gettysburg robert dennis collection of stereoscopic views 19th century history of pennsylvania new york public library back of stereoscopic card

1858 - 1900

New York Public Library

http://digitalcollections.nypl.org/

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