This brought Frank to his feet almost instantly.
But when he saw the cause of Roger’s alarm, he cooled down.
He saw that a monster whale, with mouth agape, was rushing with whirlwind velocity toward the boat.
Of course there would be a shock when the collision should come, but Frank knew that the whale would be the greatest sufferer.
The next moment it came.
The whale’s blunt head struck the Explorer’s hull.
Frank shouted to Barney.
“Charge the hull!”
Quick as a flash Barney turned a small lever.
This sent a current from the dynamos into the hull of the boat.