With his screwdriver, he removed the bottom hinge, while we crowded around him. Then he started to remove the top hinge, but found that the first screw he tried would not turn. Abandoning it, he removed all the other screws, then inserted the screwdriver beneath the hinge, and pried. The hinge came loose, but revealed the fact that the screw had been soldered to the metal back, and to a heavy wire which now protruded from the wall. The whole thing had been insulated with electricians’ tape, and the block of wood in which it was fastened had been cut out, surrounded with sealing wax, and replaced. He next removed the other side of the hinge from the door, and found it similarly connected and insulated, the wire leading to the interior of the door. Having cut the wire with a pair of pliers, the doctor laid the door on its side and removed the lock and latch. Both were controlled by an ingenious arrangement of electromagnets. The return current, he found, was through round-headed, insulated contact screws, one on the door, and one on the door jamb against which it fitted. He next turned his attention to the bottom of the door. It was evident at a glance, that a long strip of wood had been removed, replaced with glue, sanded and varnished. Using his screwdriver as a chisel, he pried up the strip of wood, and removed from the cavity behind it a heavy bar of iron. “Now,” he said, “if you will follow me to the basement I will show you the mechanism which acted on this bar of iron, causing the door to open or close.” * * * * * We filed down into the basement behind him, and he led the way to a point directly beneath the living room door. The ceiling was covered with plasterboard, a block of which he removed. Fastened to the floor in a semicircle was a string of large electro-magnets. “All of these magnets,” he said, “were caused to act in their turns by impulses of varying wave lengths which closed and opened their circuits. Naturally they pulled the bar of iron although separated by two heavy layers of wood, as there is no insulation which will stop magnetic waves, thus closing or opening the door at the will of the operator. The poker and the heavy overstuffed chair were caused to travel about the room in the same manner, the latter probably having iron bars inserted in the legs, by utilizing other electro-magnets fastened beneath the floor and concealed by this plasterboard.