This is a stereoscopic viewer from the 1800s. There are three in the Botetourt County Museum along with boxes of photographs to be used with them. Each photographic card has a separate image for the left eye and the right eye. By viewing it through the stereotype viewer it is possible to see the image in three dimensions. The one shown here is of a snowstorm. These were a 19th century craze similar to the 20th century popularity of the 3D View Masters. Today, pictures are enjoyed on phones.