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Updated: June 11, 2025
The handling of these engines is not without danger, for at 20,000 feet below the surface of the water and under such great pressure they are exposed to ruptures the consequences of which would be terrible. J.T. Maston, the commander's brother, and the engineer Murchison, without a thought of these dangers, took their places in the air-chambers.
If now, or at any future time, either of you should experience the slightest sensation of discomfort as the water rises round you, all you have to do is simply to open this air-cock, which communicates with the air-chambers, and the condensed air will at once rush in and expel the water again; then close the sea and air cocks; open this relief valve, which will allow the condensed air to disperse itself in the habitable portions of the hull, and you can at once open the door of communication to the diving chamber, and disencumber yourself of your dress, remembering always to close the door behind you.
Her floating power is due to air-chambers fitted round the sides under the seats and in the bow and stern; also to empty space and light wood or cork ballast under her floor. If thrust forcibly deep under water with as many persons in her as could be stowed away, she would, on being released, rise again to the surface like a cork.
Then he turned a sufficient stream of vapour into the air-chambers to create a partial vacuum and cause the ship to rise in the air to a height of about two hundred feet above the tops of the most lofty trees; and finally to set the engines going ahead at a speed of about fifty miles an hour, in accordance with an arrangement between himself and Sir Reginald, made the last thing before turning in on the previous night.
The very simplicity of the construction of the flues and air-chambers constitutes the chief danger, as the chances are that, unless the architect stands by and sees every joint made, the work will be done badly. Absolutely faultless workmanship must be employed throughout, and the fireclay materials must be literally of the very best and soundest description.
The projectiles were placed in position, the breeches of the guns closed, and a minute later the air-chambers were filled with air at a pressure of two hundred atmospheres, pumped from the forward engines through pipes leading up to the guns for the purpose. "Now," said Arnold, "we're ready! Meanwhile you two can go and load the two after guns." The men saluted and retired, and Arnold continued
There is enough of climbing to call into exercise long unused muscles, the granite blocks are rough, angular and irregular enough to exercise eyes, hands and feet to keep one from falling, and the lungs are filled with balsam-ladened mountain-air, fresh from God's own perfect laboratories, healing, vivifying, rejuvenating, strengthening, while the heart is helped on and encouraged to pump more and more of its blood, drawn from long almost quiescent cells into the air-chambers of the lungs, there to receive the purifying and life-giving oxygen and other chemical elements that multiply the leucocytes vastly and set them at work driving out the disease germs that accumulate and linger in every city-living man's and woman's system.
The pontoon is of special construction, and has air-chambers at the sides placed near the center, so as to balance it.
And that is precisely what we shall do; we shall force air into our air-chambers until the ship is on the point of sinking, and we shall then close the valves, stop the air-pump, and, opening the sea-cocks of the water-chambers, admit water enough into the ship to send her to the bottom like a stone." "Well! you astonish me, I freely admit," gasped the baronet.
The ship once fairly off the ground, Mildmay increased the rarefaction of the air in the air-chambers to an almost perfect vacuum, and the immense structure soared skyward with great rapidity.
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