CHAPTER XXVI
THE ELECTROLYSIS CLEW
As Kennedy walked through the corridor of the building, he paused and bent down, as though examining the wall. I looked, too. There was a crack in the concrete, in the side wall toward the Creighton laboratory.
"Do you suppose vibration caused it?" I asked, remembering his watch crystal test.
Craig shook his head. "The vibrations in a building can be shown by a watch glass full of water. You saw the surface of the liquid with its minute waves. There's vibration, all right, but that is not the cause of such cracks as these."
He stood for a moment regarding the crack attentively. On the floor on which we were was the Consolidated Bank itself. Beneath us were the Consolidated Safety Deposit vaults.
"What did cause them, then?" I asked, mystified.
"Apparently escaping currents of electricity are causing electrolysis of the Bank Building," he replied, his face wrinkled in thought.
"Electrolysis?" I repeated mechanically.