The servant had evidently worked with the old man enough to know what was expected of him. He stepped close to the floor disk and waited. The dog whined softly, sensing that all was not exactly right. The old scientist slowly shoved the lever toward the right, and as he did so a faint hum filled the room, rising to a stupendous roar as he advanced the lever. From both floor disk and upper disk leaped strange cones of blue light, which met midway to form an hour-glass shape of brilliance. The light did not waver or sparkle. It did not glow. It seemed hard and brittle, like straight bars of force. The newspaperman, gazing with awe upon it, felt that terrific force was there. What had the old man said? Warp a third-dimensional being into another dimension! That would take force! As he watched, petrified by the spectacle, the servant stepped forward and, with a flip, tossed the little dog into the blue light. The animal could be discerned for a moment through the light and then it disappeared. "Look in the globe!" shouted the old man; and Henry jerked his eyes from the column of light to the half-globe atop the machine. He gasped. In the globe, deep within its milky center, glowed a picture that made his brain reel as he looked upon it. It was a scene such as no man could have imagined unaided. It was a horribly distorted projection of an eccentric landscape, a landscape hardly analogous to anything on Earth. * * * * * "That's the fourth dimension, sir," said the servant. "That's not the fourth dimension," the old man corrected him. "That's a third-dimensional impression of the fourth dimension. It is no more the fourth dimension than a shadow is three-dimensional. It, like a shadow, is merely a projection. It gives us a glimpse of what the fourth plane is like. It is a shadow of that plane." Slowly a dark blotch began to grow in the landscape. Slowly it assumed definite form. It puzzled the reporter. It looked familiar. He could have sworn he had seen it somewhere before. It was alive, for it had moved. "That, sir, is the dog," George volunteered. "That was the dog," Dr. White again corrected him. "God knows what it is now." He turned to the newspaperman. "Have you seen enough?" he demanded. Henry nodded. The other slowly began to return the lever to its original position. The roaring subsided, the light faded, the projection in the half-globe grew fainter. "How are you going to use it?" asked the newspaperman. "I have ninety-eight men who have agreed to be projected into the fourth dimension to seek out the entities that are attacking us and attack them in turn. I shall send them out in an hour." "Where is there a phone?" asked the newspaperman. "In the next room," replied Dr. White. As the reporter dashed out of the door, the light faded entirely from between the two disks and on the lower one a little dog crouched, quivering, softly whimpering. * * * * *