Ice cave in front of American Falls.

Niagara Falls, New York, 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 miriam and ira d wallach division of art prints and photographs photography collection ice cave american falls high resolution curtis george e 1830 1910 photographer niagara falls ny and ont stereoscopic views ice cave front american united states robert dennis collection of stereoscopic views 19th century niagara falls new york public library

1858 - 1900

New York Public Library

http://digitalcollections.nypl.org/

Creative Commons CC0 1.0 Universal Public Domain Dedication ("CCO 1.0 Dedication")