He indicated, with a stubby finger, the lever to be operated.
“Keep the circuit closed for just four seconds,” he added slowly, “and then break it. Do you understand, Gaeble?” he demanded.
“I do,” replied the old man.
“Then,” continued Steinholt, “after you break that connection you quickly will close this next circuit. Keep it closed for four seconds and then, after opening it for one second, close it again for four seconds. Repeat the procedure twice more, Gaeble, after that, and then await my further instructions. Is everything clear?” he asked.
“It is, sir,” the old man replied. “I will follow your orders implicitly.”
“There is one thing more,” Steinholt said. “Get the Worldwide Tower on the televisor and warn them of what is to happen.”
“I will do that immediately,” Gaeble replied.
Dirk and Steinholt shot up to the roof again and the building over which they walked seemed to be quivering with life.
They could see that all of the mammoth dynamos beneath them were revolving and the humming which they had heard before had changed into an ugly, vibrant roar.