"Eh? Won't move? It's not heavy, is it?" demanded the Professor.

"No—about thirty pounds, but it wont move!"

Gault took hold of one of the angles of the thing, jerked at it savagely. He gave it up with an oath, returned to Harper's desk muttering.

Harper suddenly noticed the top portion of the statue. It didn't seem to be all there! He was positive there had been another section on top, shooting off at an angle, representing a problem in tangential stress. What had happened to that top section?

He would figure that out later, when the occasion was more propitious. Right now, he realized that only the presence of Dr. Pillbot prevented Gault from firing him. He cast an apprehensive glance toward his employer.

With trepidation, he saw Gault reach for something projecting from behind a bench. Gault pulled it out, held it dangling before him. A strangled exclamation of wrath came from him. His long nose pointed accusingly toward Harper, like a finger pointing out a criminal.

"I was afraid of that!" he grated. "Cutting paper dolls!" Gault was holding up a large paper cutout of a human figure—a long, rangy man.

"This is the last straw," Gault went on, his voice rising. "I have stood enough—"

"It—it wasn't me, sir," Harper cried quickly, with visions of his job and $50,000 vanishing. "It was your ten year old nephew, Rudolph, when he was here yesterday. He cut it out, said it looked like—like his uncle—"

Harper stopped as Gault seemed about to explode. Then the mathematician subsided, a malicious expression crept over his face.

"H-m-m," he said. "Might be just what I need to explain things to Dr. Pillbot."

"I shall take this matter before the Psychiatric Society," Pillbot was saying excitedly. "Undoubtedly you have some strange faculty—an instinctive perception of four dimensional laws ... what was that, Professor?"

"I said if you will step over to this desk I will explain to you in elementary terms—very elementary and easy to understand—why you will never be able to study four dimensional beings—if any exist!" Gault's voice was tinged with sarcasm.

Pillbot came over, followed by Harper, who was interested in any explanations about the fourth 

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