Mystic Gorge, looking out, Ausable [Au Sable] Chasm.

New York State 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.

au sable n y au sable river n y canyons rivers the miriam and ira d wallach division of art prints and photographs photography collection mystic gorge stoddard seneca ray 1844 1917 photographer au sable ny au sable river ny stereoscopic views mystic gorge ausable sable chasm united states au sable chasm robert dennis collection of stereoscopic views ultra high resolution high resolution nature mountains new york public library

1850 - 1930

New York Public Library

https://digitalcollections.nypl.org/

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