Shadows on the Wall.
The exhibitor, as well as the cardboard figures, is placed behind the spectators, a position which has many advantages. Place on the table a lighted candle, and in front of it, at two or three feet distance, attach to the wall a sheet of white paper to form your “screen.” Between the light and the screen interpose some opaque body, for example, an atlas or other large book.
But under such conditions how are we to cast the shadows on the screen? Simply by the use of a mirror, placed at the side of the table. The reflection of the mirror will appear on the wall as a luminous space, oval or oblong as the case may be, and if you have placed it at the proper angle with reference to the screen, and move your cardboard shapes about cleverly between the candle and the mirror, you will forthwith see little fantastic figures projected in shadow on the screen, while the uninitiated spectator is wholly at a loss to discover how you produce them.