Following their invention in the mid-nineteenth century, the lantern slide, also known as a magic lantern slide, were used to give shows where the projected images could be seen by an audience. The shows often traveled, and could be seen in tents, dime museums, schools, etc. The lantern slide is a positive transparency that comprises a photographic emulsion containing the image, which is bound to a glass plate and covered by another thin layer of glass; the plates are then secured with strips of gummed paper tape. Various processes were used to create lantern slides including the albumen, wet plate collodion, gelatine dry plate and woodburytype methods.