Stereograms were early 3D images created by taking two images from slightly different angles and then viewing them with a stereoscope, which is a device that shows separate pictures to each eye. The mind then combines these images into a perceived three-dimensional environment.
The below are by Rufus Morgan from the Collections Library at UNC - Chapel Hill.
Rufus Morgan, a portrait and stereograph photographer, was born in Virginia in 1846 and died in California in 1880. He spent much of his adult life in North Carolina and operated studios at several locations across the state, including New Bern, Goldsboro, and Raleigh. Morgan's photographs were taken mostly in North Carolina, but he also traveled to South Carolina, Georgia, Florida, New York, and California.
In 1873, Morgan married Mary Devereux Clarke (1854-1931) of New Bern, N.C. The couple had two children. Their daughter, Bayard Morgan Wootten (1875-1959), was also a successful photographer and studio operator. Morgan retired from photography in 1878-1879 and moved to the San Diego area of California. He died soon after moving to California in 1880.