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Updated: May 2, 2025
Just as we came abreast of the end of the pier and saw the white-capped waves rolling in upon us, I put the horizontal rudder hard down and she slid under water. Through my glass portholes I saw its light green change to a dark blue, while the manometer in front of me indicated twenty feet.
A manometer worked by compressed air, an instrument used to ascertain the upper atmospheric pressure on the level of the ocean. Perhaps a common barometer would not have done as well, the atmospheric pressure being likely to increase in proportion as we descended below the surface of the earth.
After the required depth has been reached something which may easily be read from the manometer that records the depth all further sinking may be stopped by simply lightening the hull, which is done by forcing out some of the water in the submarine's tanks. The furious growling of the pump is always a sure sign that the required depth is being approached.
About three in the morning, I noticed that the lower surface of the iceberg was only about fifty feet deep. One hundred and fifty feet now separated us from the surface of the waters. The iceberg was by degrees becoming an ice-field, the mountain a plain. My eyes never left the manometer. We were still rising diagonally to the surface, which sparkled under the electric rays.
Warned by his first experience, Bottazzi nailed or screwed every movable thing fast to the walls of the cabinet. He was resolute to force 'John, the supposed 'guide, to touch the electric button and press the ball of India-rubber that connected with a mercury manometer. He intended to teach the spirit hand to register its actions on a revolving cylinder of smoked tin.
But at this moment who knows if we may not be frightfully crushed between the two glassy surfaces? I reflected on all the consequences of our position. Captain Nemo never took his eyes off the manometer. Since the fall of the iceberg, the Nautilus had risen about a hundred and fifty feet, but it still made the same angle with the perpendicular. Suddenly a slight movement was felt in the hold.
Petersburg a manometer was introduced into the central end of the carotid artery of a bitch; a male dog was then introduced, and during coitus observations were made on the blood-pressure at the peripheral and central ends of the artery.
The men in the central began to look at one another.... Ugh! it gives one a creepy feeling to go slipping away into the unknown amidst this infernal singing silence and to see nothing but the climbing down of the confounded indicator upon the white-faced dial.... There was nothing else to be seen in my turret. I glanced at the chart and then at the manometer in a pretty helpless fashion.
"It is easy to decide," I answered. I consulted the manometer. To my great surprise, it showed a depth of more than 180 fathoms. "What does that mean?" I exclaimed. "We must ask Captain Nemo," said Conseil. "But where shall we find him?" said Ned Land. "Follow me," said I, to my companions. We left the saloon. There was no one in the library.
Bennie, momentarily expecting annihilation, crawled on all fours to Burke's side. The needle of the manometer indicated nine thousand five hundred feet, and was rapidly nearing the next division.
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