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Updated: May 2, 2025
At this moment the Nautilus arrived at the side of this high, perpendicular wall. What it would do, I could not guess. I returned to my room; it no longer moved. I laid myself down with the full intention of waking after a few hours' sleep; but it was eight o'clock the next day when I entered the saloon. I looked at the manometer.
M. Stockalper, who experimented on great pressures, used metallic gauges, which are instruments on whose sensibility and correctness complete reliance cannot be placed; and moreover the standard manometer with which they were compared was one of the same kind.
Look at the needle of the manometer; it shows that the Nautilus is rising, but the block of ice is floating with it; and, until some obstacle stops its ascending motion, our position cannot be altered." Indeed, the Nautilus still held the same position to starboard; doubtless it would right itself when the block stopped.
The result was that the hand of the manometer, being pressed against the walls of the box, became bent, and though the boiler was submitted to a pressure the degree of which it was impossible to measure, it was not changed in the slightest.
And we continued to sink deeper and deeper. The dial was now announcing 40 meters. This was a bit too much for me. I called down to the central and got back the comforting answer that the large manometer was also indicating a depth of over forty meters! The two manometers agreed. This, however, did not prevent the boat from continuing to sink.
"These are the usual nautical instruments," I replied, "and I know the use of them. But these others, no doubt, answer to the particular requirements of the Nautilus. This dial with movable needle is a manometer, is it not?" "It is actually a manometer. But by communication with the water, whose external pressure it indicates, it gives our depth at the same time."
It aroused the pride of Davos after he had read the revolutionary theories of Pierre Bounier regarding the touch. So subtle could the art of touch be cultivated, the pianist believed, that the blind could feel colour on the canvas of the painter. He spent weeks experimenting with a sensitive manometer, gauging all the scale of dynamics.
Fortunately, when we had started I had pumped in from five to six tons of water, filling all the tanks. I increased the weight of the boat to the utmost, and suddenly we felt a shock and were clear of the netting. I then descended as deeply in the water as I could, the manometer showing thirty metres. We remained under water for eighteen hours.
The vessel had slanted down toward the bows at an angle of about 36 degrees. She was standing, so to speak, on her head. Our bow was fast upon the bottom of the sea our stern was still oscillating up and down like a mighty pendulum. The manometer showed a depth of about 15 meters. However, the Deutschland finally worked herself free and soon was again on the surface.
Brouardel's manometer, represented herewith, is designed for showing graphically variations in the pressure of gas, either at the works during the course of manufacture, or at any point whatever in the system of piping.
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