Crocker slate quarry, Brownville. Maine, Stereoscope Card, NYPL.

Maine 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.

Мэн Крокер сланцевый карьер высокое разрешение hinds al active 1870 1879 фотограф стереоскопические виды крокер шифер карьер Brownville Соединенные Штаты Aroostock County Piscataquis County Роберт Деннис коллекция стереоскопических изображений 19 век публичная библиотека Нью-Йорка обратная сторона стереоскопической карты

1858 - 1900

New York Public Library

http://digitalcollections.nypl.org/

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