"My boy," he said, "we are to strike back. We are going to invade the fourth-dimensional plane of these hellhounds. We are going to make them feel our strength. We are going to strike back."
Henry Woods sprang to his feet.
"How?" he shouted. "Have you...?"
Dr. White nodded.
"I have found a way to send the third-dimensional into the fourth. Come and I will show you."
The machine was huge, but it had an appearance of simple construction. A large rectangular block of what appeared to be a strange black metal was set on end and flanked on each side by two smaller ones. On the top of the large block was set a half-globe of a strange substance, somewhat, Henry thought, like frosted glass. On one side of the large cube was set a lever, a long glass panel, two vertical tubes and three clock-face indicators. The control board, it appeared, was relatively simple.
Beside the mass of the five rectangles, on the floor, was a large plate of transparent substance, ground to a concave surface, through which one could see an intricate tangle of wire mesh.
Hanging from the ceiling, directly above the one on the floor, was another concave disk, but this one had a far more pronounced curvature.
Wires connected the two disks and each in turn was connected to the rectangular machine.