"What's the matter?" he demanded.
"We have to find my wrench!"
"Your wrench?" Greg was puzzled. "Can't you get another?"
"I dropped it into the field. Its time-dimension was reduced to zero. It became an 'instantaneous wrench'."
"Nothing new in that," said Greg, unruffled.
"But there is," persisted Russ. "The field collapsed, you see. Maybe the wrench was too big for it to handle. And when the field collapsed the wrench gained a new time-dimension. I heard it. We have to find it."
The three of them pounded up the stairs to the room where Russ had heard the thump. There was nothing on the floor. They searched the room from end to end, then the other rooms. There was no wrench.
At the end of an hour Greg went back to the main laboratory, brought back a portable fluoroscope.
"Maybe this will do the trick," he announced bleakly.