"A whole carton."

"Then I guess we're already to make the experiment. You're sure. Nanette, that you're not afraid of...."

"Don't be silly, Aaron. I haven't grown up with Karl for nothing. He's always used me for the disagreeable end of his crazy experiments. And besides," she smiled on both men. "I have a woman's curiosity for the unknown."

"Very well," said Carruthers gravely. From his waistcoat pocket he took a ring of keys and inserted one of them into the lock of an immense steel door. "Our laboratory," he announced, swinging the door wide.


anette's eyes opened wide at the paneled whiteness of the room. Most of the far side was taken up with electrical machines, dynamos, generators and glass enclosed motors of an advanced type. Overhead, concealed lights made the room as light as day. A heavy glass railing shielded a square spot in the exact center of the room.

"What's that for?" asked the girl.

Danzig and Carruthers both regarded it with troubled eyes. It was Carruthers who spoke.

"That railing marks the spot where Professor Dahlgren stood when the rays of our atomic machine struck him."