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p149
Arosy-cheeked and diminutive instructor of technical sciences named Dr. Hauptmann pecls off his brass-buttoned coat and hangs it over the back ofa chair. He orders the cadets in Wernet's class to collect hinged metal boxes from a locked cabinet at the back of the laboratory.
Inside each are gears, lenses, fuses, springs, shackles, and resistors. There's a fat coil of copper wire, a tiny instrument hammer, and a two terminal battery as big as a shoefiner equipment than Werner has had access to in his life. The little professor stands at the chalkboard drawing a wiring schematic for a simple Morse-code practice circuit He sets down his chalk, presses his slender fingertips together, five to five, and asks the boys to assemble the circuit with the parts in their kits.“You have one hour.”
Most of the boys blanch. They dump everything out on the tables and poke gingerly at the parts as if at trinkets imported from some future age. Frederick plucks random pieces out of his box and holds them to the light.
For a moment Werner is back inside his attic room at Children's House, his head a swarm of questions. What is lightning? How bigh could you jump ifyou lived on Mars? What is the difference between twice twenty.five and wice fve and twenty? Then he takes the battery,two rectangles of sheet metal, some penny nails, and the instrument ham- mer from his box. In under a minute, he has built an oscillator to match the schematic.
The little professor frowns. He tests Werner's circuit, which works
“Right ”he says,and stands in front of Werner's table and laces his hands behind his back."Next take from your kit the disk-shaped magnet,a wire, a screw, and your battery”Though his instructions seem meant for the class, he looks at Werner alone." That is all you may use. Who can build a simple motor?"
Some boys stir the parts in their kits halfheartedly. Most simply watch.
Werner feels Dr. Hauptmann's attention on him like a foodlight He sticks the magnet to the screw's head and holds the screw's point to the positive terminal on the battery. When he runs the wire from the negative side of the battery to the head of the screw, both the screw and the magnet start to spin. The operation takes him no more than fifteen seconds.
Dr. Hauptmann's mouth is partially open. His face is flushed,adre nalized.“What is your name, cadet?”
“Pfennig,sir.”
“What else can you make?"
Werner studies the parts on his table.“A doorbell, sir? Or a Morse beacon? An ohmmeter?"
The other boys crane their necks. Dr. Hauptmann's lips are pink and his eyelids are improbably thin. As though he is watching Werner even when he blinks. He says,“Make them all.”
