Bridger Canon -- near Fort Ellis, Montana Territory

Stereographs are devices capable of building a three-dimensional​ image out of two photographs that have about two and a half inches difference between them so that it could imitate the two eyes’ real field of view. Combining these images into a single one with the help of stereoscope, a person can experience the illusion of the image’s depth. Stereoscope uses the same principle as in human binocular vision. Our eyes are separated by about two inches, so we see everything from two different angles. When the brain combined those views in a single picture, we get the spatial depth and dimension. Stereographs were extremely popular between 1850 and 1930 all around the world. Millions of stereographs were made during that time. There was a broad range of themes: landscape, travel, historical moments, nature disasters, architecture and many others. Nowadays, simply launch this collection full screen and put your mobile device in Google Cardboard Viewer.

William Henry Jackson (1843-1942) was an American painter, photographer, and explorer who is best known for his pioneering work in documenting the American West. He was born in Keeseville, New York, and after serving in the Union Army during the American Civil War, he became interested in photography. Jackson worked as a photographer for the United States Geological Survey, and he was a member of several expeditions to the West, including the Hayden Geological Survey of 1871. During these expeditions, he produced a large number of photographs that helped to document the landscape and the Native American cultures of the region. Jackson's photographs were instrumental in promoting the idea of creating national parks in the United States. He was also one of the founding members of the Detroit Photographic Company, which produced a large number of postcards and other commercial products based on his photographs.