"I see no reason why we can't get right at it again this afternoon," he said, perspiring profusely. "We'll be able to run off a test before twelve; if it comes out all right, we can shift the routine work to the new circuits and get at the rest of the board." Dr. Albie, surprisingly, had no objection. Benton had expected an argument, due to the master physicist's propensity for running exhaustive tests, but none materialized. "Good idea," said Albie. "There's no telling when we'll get another chance. I hear the army has a plan to extend radar coverage clear around the continent. That'll involve a lot of work for Urei. Best get the new circuits in now; if any bugs pop up we'll have time to correct them in the next few days. After that there mightn't be an opportunity for months...." * * * * * The test was perfect; such things were more or less standardized. Problems which required a fair sampling of the great machine's stored memories were used. Dr. Albie checked the solution speeds on the various tests against the speeds recorded with the old control circuits. He was as smugly satisfied as if he had devised the entire system himself. Benton's enthusiasm was verbose; he talked more than usual because speech involves the use of muscles and that requires strong surface thoughts. It wouldn't pay, at this point in his campaign, to let Urei suspect that his choice of circuits to test was anything but as haphazard as it appeared to Dr. Albie. There were nine of these test problems. Benton fed them at random into the circuits marked _Ten, Three, Twenty-one, Sixteen, Twenty-four, Fifteen, One, Eight and Eighteen._ He did it blithely, keeping up a running description of the many annoyances that had cropped up in the morning's work, and commenting on the quality of the help he had been given by the various technicians. "There isn't a bad one in the crop," he said. "But if we are going to cut the control staff, I'd recommend putting Hackett and McGivern upstairs. Hackett has family problems that he likes to hand Urei when nobody's around; he's capable, though, and he'd do all right on the memory circuits. McGivern has already asked for a transfer, so we may as well oblige." Dr. Albie nodded absently, being completely engrossed in checking the speeds as each solution popped up on the board. In about a half-hour they were all in, and all clipped several minutes from previous tests. "Excellent, excellent," Dr. Albie pronounced, his face hovering between a smile and a frown. "I'll cut the other half of the board and you can get started immediately. If it takes longer than you expect, stay with it; I'll cover in for the next three days while you catch up on your rest."