"Don't think that!"

An interior signal-panel was beside Grantline. He called the duty-men in the instrument room.

"It's over. What are your readings?"


he bombarding electrons had passed through the outer shell of the building's double-wall, and been absorbed in the rarefied, magnetized air-current of the Erentz circulation. Like poison in a man's veins, reaching his heart, the free alien electrons had disturbed the motors. They accelerated, then retarded. Pulsed unevenly, and drew added power from the reserve tanks. But they had normalized at once when the shot was past. The duty-man's voice sounded from the grid in answer to Grantline's question:

"Five degrees colder in your building. Can't you feel it?"

The disturbed, weakened Erentz circulation had allowed the outer cold to radiate through a trifle. The walls had had a trifle extra explosive pressure from the room-air. A strain—but that was all.

"It's probably their most powerful single weapon, Gregg." Grantline said.

I nodded. "Yes. I think so."