Van Manderpootz greeted me cordially enough, but with a curious assumption of melancholy in his manner. "Ah, Dixon," he began, "I am glad to see you. Since our last meeting, I have learned much of the stupidity of the world, and it appears to me now that you are actually one of the more intelligent contemporary minds."

This from van Manderpootz! "Why — thank you," I said.

"It is true. For some days I have sat at the window overlooking the street there, and have observed the viewpoints of the passers-by. Would you believe" — his voice lowered — "would you believe that only seven and four-tenths percent are even aware of the existence of van Manderpootz? And doubtless many of the few that are, come from among the students in the neighborhood. I knew that the average level of intelligence was low, but it had not occurred to me that it was as low as that."

"After all," I said consolingly, "you must remember that the achievements of van Manderpootz are such as to attract the attention of the intelligent few rather than of the many."

"A very silly paradox!" he snapped. "On the basis of that theory, since the higher one goes in the scale of intelligence, the fewer individuals one finds, the greatest achievement of all is one that nobody has heard of. By that test you would be greater than van Manderpootz, an obvious reductio ad absurdum."

He glared his reproof that I should even have thought of the point, then something in the outer laboratory caught his ever-observant eye.

"Carter!" he roared. "Is that a synobasical interphasometer in the positronic flow? Fool! What sort of measurements do you expect to make when your measuring instrument itself is part of the experiment? Take it out and start over!"