Jack began to flood, slowly, the water tanks, the "Pollard" sinking
gradually. With the young captain at one side of the gauge, Messrs.
Farnum and Pollard took their posts at the other side, to watch the
readings.
"How many feet down do you want to go?" asked young Benson, coolly.
"How far down do you dare to take the boat?" asked Mr. Farnum, almost
hesitatingly.
"As far as you dare to let me," replied Jack, with spirit. "Watch
the gauge, and tell me when to stop."
"Jove, but you have a cool nerve, lad, if you back that up," laughed
lieutenant McCrea.
"Perhaps our young skipper is relying upon the caution of his employer,"
suggested Commander Ennerling, smiling.
It is always a question of great importance just how far below the
surface a submarine torpedo boat may go with safety. The greater the
depth the more enormous the pressure of the water. At sufficient depth
the water pressure is terrific enough to crush in the hull of the
stoutest submarine. At even less depth the pressure may easily start
the plates so that the inrush of water will destroy all on board.
Yet Jack Benson's proposition was to send the "Pollard" further and
further below the surface, until owner or inventor should order him to
stop.
All three of the Navy officers shot a look of admiration at the doughty
young skipper. Then, almost immediately, their faces resumed their
usual expressions.
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