LANTERN

metal case with gla — shutter to protect flame from wind. Hanging i’s found in Pompeii and Herculaneum have body of bronze and horn plates. Dark l. has shutter or slide by which the light may be cut off. Magic or Optical L., instrument for projecting views on a@ screen, was invented by Kircher c. 1646; consists of body, generally of Ru ian iron, and a ~ system of lighting, of which the most common is limelight (lime is made white-hot by flame of coal-gas and oxygen), and arrangement for projection; a condenser is used for rendering the rays of light parallel, and transparent slides, photographic positives, are introduced between condenser and projector.