on, have a jolt," Martin urged. "Or don't you want to break bread with me, under the circumstances?"
"How can I?" the robot asked. "I'm a robot." His voice sounded somewhat wistful. "What happens?" he inquired. "Is it a lubricatory or a fueling mechanism?"
Martin glanced at his brimming glass.
"Fueling," he said tersely. "High octane. You really believe in staying in character, don't you? Why not—"
"Oh, the principle of irritation," the robot interrupted. "I see. Just like fermented mammoth's milk."
Martin choked. "Have you ever drunk fermented mammoth's milk?" he inquired.
"How could I?" the robot asked. "But I've seen it done." He drew a straight line vertically upward between his invisible eyebrows, managing to look wistful. "Of course my world is perfectly functional and functionally perfect, but I can't help finding temporalizing a fascina—" He broke off. "I'm wasting space-time. Ah. Now. Mr. Martin, would you be willing to—"
"Oh, have a drink," Martin said. "I feel hospitable. Go ahead, indulge me, will you? My pleasures are few. And I've got to go and be terrorized in a minute, anyhow. If you can't get that mask off I'll send for a straw. You can step out of character long enough for one jolt, can't you?"
"I'd like to try it," the robot said pensively. "Ever since I noticed the effect fermented mammoth's milk had on the boys, it's been on my mind, rather. Quite easy for a human, of course. Technically it's simple enough, I see now. The irritation just increases the frequency of the brain's kappa waves, as with boosted voltage, but since electrical voltage never existed in pre-robot times—"
"It did," Martin said, taking another drink. "I mean, it does. What do you call that, a mammoth?" He indicated the desk lamp.
The robot's jaw dropped.
"That?" he asked in blank amazement. "Why—why then all those telephone poles and dynamos and lighting-equipment I noticed in this era are powered by electricity!"
"What did you think they were powered by?" Martin asked coldly.
"Slaves," the robot said, examining the lamp. He switched it on, blinked, and then unscrewed the bulb. "Voltage, you say?"
"Don't be a fool," Martin said. "You're overplaying your part. I've got to get going in a minute. Do you want a jolt or don't you?"
"Well," the robot said, "I don't want to seem unsociable. This ought to work." So saying, he stuck his finger in the lamp-socket. There was a brief, crackling flash. The robot withdrew his finger.
"F(t)—" he said, and swayed slightly. Then his fingers came up and sketched a smile that seemed, somehow, to express delighted surprise.
"Fff(t)!" he said, and went on rather thickly, "F(t) integral between plus and minus infinity ... a-sub-n to e...."
Martin's eyes opened wide with shocked horror. Whether a doctor or a psychiatrist should be called in was debatable, but it was perfectly evident that this was a case for the medical profession, and the sooner the better. Perhaps the police, too. The bit-player in the robot suit was clearly as mad as a hatter. Martin poised indecisively, waiting for his lunatic guest either to drop dead or spring at his throat.
The robot appeared to be smacking his lips, with faint clicking sounds.
"Why, that's wonderful," he said. "AC, too."
"Y-you're not dead?" Martin inquired shakily.
"I'm not even alive," the robot murmured. "The way you'd understand it, that is. Ah—thanks for the jolt."
* * * * *
Martin stared at the robot with the wildest dawning of surmise.
"Why—" he gasped. "Why—you're a robot!"
"Certainly I'm a robot," his guest said. "What slow minds you pre-robots had. Mine's working like lightning now." He stole a drunkard's glance at the desk-lamp. "F(t)—I mean, if you counted the kappa waves of my radio-atomic brain now, you'd be amazed how the frequency's increased." He paused thoughtfully. "F(t)," he added.
Moving quite slowly, like a man under water, Martin lifted his glass and drank whiskey. Then, cautiously, he looked up at the robot again.
"F(t)—" he said, paused, shuddered, and drank again. That did it. "I'm drunk," he said with an air of shaken relief. "That must be it. I was almost beginning to believe—"
"Oh, nobody believes I'm a robot at first," the robot said. "You'll notice I showed up in a movie lot, where I wouldn't arouse suspicion. I'll appear to Ivan Vasilovich in an alchemist's lab, and he'll jump to the conclusive I'm an automaton. Which, of course, I am. Then there's a Uighur on my list—I'll appear to him in a shaman's hut and he'll assume I'm a devil. A matter of ecologicologic."
"Then you're a devil?" Martin inquired, seizing on the only plausible solution.
"No, no, no. I'm a robot. Don't you understand anything?"
"I don't even know who I am, now," Martin said. "For all I know, I'm a faun and you're a human child. I don't think this Scotch is doing me as much good as I'd—"
"Your name is Nicholas Martin," the robot said patiently. "And mine is Eniac."
"Eniac?"
"Eniac," the robot corrected, capitalizing. "Eniac Gamma the Ninety-Third."
So saying, he unslung a sack from his metallic shoulder and began to rummage out length upon length of what looked like red silk ribbon with a curious metallic lustre. After approximately a quarter-mile of it had appeared, a crystal football helmet emerged attached to its end. A gleaming red-green stone was set on each side of the helmet.
"Just over the temporal lobes, you see," the robot explained, indicating the jewels. "Now you just set it on your head, like this—"
"Oh no I don't," Martin said, withdrawing his head with the utmost rapidity. "Neither do you, my friend. What's the idea? I don't like the looks of that gimmick. I particularly don't like those two red garnets on the sides. They look like eyes."
"Those are artificial eclogite," the robot assured him. "They simply have a high dielectric constant. It's merely a matter of altering the normal thresholds of the neuron memory-circuits. All thinking is based on memory, you know. The strength of your associations—the emotional indices of your memories—channel your actions and decisions, and the ecologizer simply changes the voltage of your brain so the thresholds are altered."
"Is that all it does?" Martin asked suspiciously.
"Well, now," the robot said with a slight air of evasion. "I didn't intend to mention it, but since you ask—it also imposes the master-matrix of your character type. But since that's the prototype of your character in the first place, it will simply enable you to make the most of your potential ability, hereditary and acquired. It will make you react to your environment in the way that best assures your survival."
"Not me, it won't," Martin said firmly. "Because you aren't going to put that thing on my head."
The robot sketched a puzzled frown. "Oh," he said
