"Van Manderpootz," he announced, "is a mathematician, not a magician. Do you expect me to materialize an ideal for you?" When I had no reply but a groan, he continued. "Now I think it safe enough to try the device myself. I shall take—let's see—the thought 'man.' I shall see what the superman looks like, since the ideal of van Manderpootz can be nothing less than superman." He seated himself. "Turn that switch," he said. "Now!"
I did. The tubes glowed into low blue light. I watched dully, disinterestedly; nothing held any attraction for me after that image of the ideal.
"Huh!" said van Manderpootz suddenly. "Turn it on, I say! I see nothing but my own reflection."
I stared, then burst into a hollow laugh. The mirror was spinning; the banks of tubes were glowing; the device was operating
