Consists of more than 300 original stereo-views (two identical images printed side by side that appear three-dimensional when placed in a stereoscopic viewer) that were taken of sights along the Union Pacific or Central Pacific Railroads in Nebraska, Wyoming, Utah, Nevada, and California as well as a few general views in Utah (especially Salt Lake City), Oregon, Idaho, Colorado, and Arizona. Also included are several Native American portraits and views of Yellowstone National Park. Many photographers are represented in this collection including Andrew Joseph (A.J.) Russell, William Henry Jackson, Charles William (C.W.) Carter, Carleton Watkins, John K. (Jack) Hillers, William Bell, and Eadweard Muybridge.