“Because the cabin we are in has its supports perfectly insulated. It is independent of the steel hull, and only connected with it by rubber cushions.”
“Whew!” exclaimed young Harmon. “Who’d ever have thought of that? Certainly you are the most wonderful inventor yet, Mr. Reade.”
Roger went to the window and looked out.
“But I don’t see how you can tell how deep we are,” he said.
“That is easy,” said Frank.
“Well, how?”
The famous young inventor turned to a dial upon the wall.
“Do you see that hand upon the dial?” he said. “Well, that is connected simply with an electrical disc upon the top of the hull. The greater the depth the more pressure, and the dial records the number of fathoms.”
Roger gazed at the instrument.
“Well, I never!” he exclaimed; then reading from the face of the dial. “We are now nineteen fathoms deep.”