"Maculay's Equations are in error," said the doctor. Cliff Maculay stirred, shook his head, and began to disagree violently. Then he relaxed, since he had come there to solve an error; but he had become tense again. Hanson shook his head unhappily; this was going to take time and effort. He must take this conversion slowly, since it was apparent that the slightest touch upon dangerous ground would trigger the big brain into reaction and perhaps undo in the space of a second the work of several hours. Gradually, prying and working, Hanson began to elicit information from Maculay. Bits of character traits, an impulse suppressed, an attitude formed in youth, an impediment created to shut out the demands of normal living, desires for this and wants for that. Hanson looked at them clinically, then either reversed them or let them stand, depending upon their possible affect. Each phase took time; it is not simple to take a man who has never held a billiard cue and make him believe that excellence at the pool table is an evidence of a sharp eye and fine coordination instead of the result of a misspent youth. And Cliff's attitude towards women was troublesome. His mother, the youthful reading of too much of King Arthur, or Lord knew what, had given Maculay the odd idea that a woman was a sort of goddess, not to be touched by the hand of clod-like man. To reverse this attitude towards a more practical attitude was difficult, since the reversion must not be complete. Hanson did not want Cliff to reverse completely, to the other extreme, where the man would go out and start treating women like galley slaves, punching bags, or chattels—which, in fact, was about the way Maculay had expected to be treated. Hanson took a brief rest from the hard job, by recalling and telling Maculay every risque story he could remember. Then he was at it again, prying and probing, and reversing Maculay's attitude on gambling, liquor, tobacco, and politics. He made a slight revision on Cliff's idea of proper dress; the physicist had a horror of appearing dirty, even when engaged in the dirtiest of jobs. With some effort the doctor convinced Maculay that a mechanic emerging from beneath a car with a face full of grime was not automatically an undesirable character, either to men or women. The crux of the matter was whether he liked that condition of dirt or not. With a number of factors accomplished, Hanson took a deep breath, felt his pulse, counted his heartbeat and respiration, and fished for a