Bird's view of the business district, Dubuque, 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 dubuque iowa bird s view business district high resolution root samuel 1819 1889 photographer stereoscopic views bird view business dubuque robert dennis collection of stereoscopic views 19th century new york public library back of stereoscopic card

1867

New York Public Library

http://digitalcollections.nypl.org/

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