the card which the young man is holding in his hand bore the least resemblance to a lion's head, but there is no mistaking the shadow on the wall.
The most wonderful public exhibitions of optical illusions have been those in which a real ghost or spectre apparently moves across the stage of a theatre. This has frequently been done in late years, both in this country and Europe. The audiences were perfectly amazed to see a spirit suddenly appear, walk about the stage, and act like a regular ghost, who did not seem to be in the least disturbed when an actor fired a pistol at him, or ran him through with a sword. The method of producing this illusion is well shown in the accompanying picture. A large plate of glass is placed in front of the stage so that
