Burt's Cave, near Maquoketa River, Jackson County, Iowa.

Iowa 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.

iowa trees caves shrubs jackson county iowa burt s cave maquoketa river jackson county gardner r g photographer stereoscopic views burt cave maquoketa river robert dennis collection of stereoscopic views 19th century ultra high resolution high resolution new york public library

1870 - 1870

New York Public Library

https://digitalcollections.nypl.org/

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