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Updated: June 11, 2025
They accordingly entered the pilot-house, shutting the door after them, and closing all the windows; then the professor turned a full jet of vapour into the air-chambers for a moment, producing a perfect vacuum therein, and the ship at once began to mount into the ether with greatly accelerated speed, as they could easily see by watching the barometer, the bulb of which, completely protected, was situate outside the walls of the pilot-house.
When a bird mounts upward, the air inside its body gradually expands, but the bird does not feel any inconvenience; for, at each breath, part of the air passes from the air-chambers into the lungs, so that the pressure on the inside does not become greater than that on the outside.
This ascertained, Mildmay who usually performed the duties of navigator ascended to the pilot-house and, injecting a sufficient quantity of vapour into the air-chambers to produce the required vacuum, caused the ship to rise to a height of ten thousand feet into the calm belt, sent the engines ahead, gradually raising their speed to the maximum, and meanwhile heading the ship upon her proper course.
There was no previous experience to go by, but every precaution seen to be necessary was taken; the hours of work were made very short, the elevator was provided, medical attendance and hospital care were given free. After the first disasters no man was allowed to work in the air-chambers without a doctor's permit.
The whole crew of the Vaterland assembled upon the hanging gallery; the crews of the other airships manned the air-chambers, that is to say, clambered up the outer netting to the upper sides. The officers appeared upon the machine-gun platforms. Bert thought it an altogether stupendous sight, looking down, as he was, upon the entire fleet.
It commences in the oolite, and terminates in the next formation. It is an elongated, conical shell, terminating in a point, and having, at the larger end, a cavity for the residence of the animal, with a series of air-chambers below. The animal, placed in the upper cavity, could raise or depress itself in the water at pleasure by a pneumatic operation upon the entral air tube pervading its shell.
He reversed the great wheel controlling the valve which admitted the vapour that drove the air out of the air-chambers of the great ship, thus creating a vacuum there by the subsequent and almost instant condensation of the vapour, and, softly made his way out on deck where, walking to the rail, he looked forth upon the landscape that was dimly widening out beneath him as the Flying Fish continued to float gently upward.
And, as you say, she's a lot better than the long-boat; she've got air-chambers, I see, and in fact she's a proper life-boat, and she's roomy enough to take all hands of us if anything should happen. What say, chaps, shall us try it?" This last to the other men, who had stood around listening to everything that was said.
In fact, almost the only difference between lifeboats and ordinary boats, at this time, was the incapacity of the former to sink when filled with water, owing to the buoyancy of the air-chambers fitted round their sides.
"To get lifeboats to right themselves w'en they're upset," replied Jeph, regarding his model with a look of perplexity. "You see it's all very well to have 'em filled with air-chambers, which prevents 'em from sinkin'; but w'en they're upset, d'ye see, they ain't o' no use till they gets on their keels again; and that ain't easy to manage.
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