magic lantern 
noun historical
A simple form of image projector used for showing photographic slides.Fuller's stage performances utilised electric lighting, coloured gels, magic lanterns, shadow-play and projections to create spectacular onstage effects, making her experiments with film a logical development of her art....
- Martin also sold magic lanterns, which projected ghostly figures onto walls or clouds of smoke, as well as convex and concave glasses, mirrors that curved and distended proportions.
- Now that was the new technology and they were just starting to use electric lights to project the magic lanterns instead of the carbide lamps,