Stereoscopic views of Gettysburg, Pennsylvania. Gettysburg PA. Stereoscope card.

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.

Пенсильвания Gettysburg PA солдат национальное кладбище геттисберг па стереоскопические виды стереоскопический взгляды Gettysburg Соединенные Штаты Роберт Деннис коллекция стереоскопических изображений история Пенсильвании сверхвысокое разрешение высокое разрешение публичная библиотека Нью-Йорка

1850 - 1930

New York Public Library

https://digitalcollections.nypl.org/

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