High Cliff below Middle Fall, Portage, NY.

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.

portage ny каньоны Genesee River Па и Нью-Йорк Отделение репродукций и фотографий miriam and ira d wallach коллекция фотографий высокая скала средняя осень высокое разрешение portage ny стереоскопические виды высокая Утес середина Осень перевозка Соединенные Штаты Роберт Деннис коллекция стереоскопических изображений 19 век Всемирного наследия архитектура историческое место nypl Нью-Йорк

1870

New York Public Library

http://digitalcollections.nypl.org/

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