Page:Popular Science Monthly Volume 89.djvu/409

 Sta.^'in? a Coney Island Zeppelin Raid

���METAL TUBE

���This Device for Hoisting the Aeroplanes and Revolving Them at the Same Time So as to Make Them Rise in a Realistic Spiral Consists of a Stationary Drum Attached to a Beam Set High Above the Stage and at the Bottom a Derrick Arm Which Is Revolved by a Small Motor. The Saltpetre in the Metal Tube and the Red Light Powder Back of the House-Front Are Ignited as the Bomb Is Dropped and Give the Effect of an Explosion and Conflagration In- side of the Dwelling

��The Mechanism Which Gives the Impression of Distance. The Operator's Cage and Switchboard Are Seen in the Upper Right- Hand part of the' Illustration. The Placing of the Searchlights Is Indicated at the Left of the Picture. In the Tank Which Represents a Harbor, a Small Steamerls Float- ing in the Wings Until the Prop- er Moment for It to Appear

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��A String of Nine Lights Operated by a Three-Throw, Motor-turned Crank Which Light Up the Windows One by One and Later When the Raid Is On and the City Is in Darkness Are Used as Revolving Searchlights

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