Section of the original Big Tree, diameter 25 feet, Mammoth Trees of Calaveras Co., California.

California 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.

california trees redwoods forests tourism the miriam and ira d wallach division of art prints and photographs photography collection big tree mammoth trees pond c l charles l photographer stereoscopic views section big tree diameter mammoth calaveras calaveras co united states calaveras county robert dennis collection of stereoscopic views ultra high resolution high resolution nature new york public library

1850 - 1930

New York Public Library

https://digitalcollections.nypl.org/

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