Old Faithful in eruption.19th century US expeditions surveys.

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.

Expeditionen Umfragen geographische Vermessungen westlich des 100. Meridians us Old Faithful Jackson William Henry 1843 1942 Fotograf Expeditionen und Umfragen stereoskopische Ansichten alt treu Eruption Umfragen Expeditionen Robert Dennis Sammlung von stereoskopischen Ansichten 19. Jahrhundert ultrahohe Auflösung hohe Auflösung nypl

1870 - 1875

New York Public Library

https://digitalcollections.nypl.org/

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