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There several groups of sea cows were living in family units. These were manatees, which belong to the order Sirenia, like the dugong and Steller's sea cow. Harmless and unaggressive, these fine animals were six to seven meters long and must have weighed at least 4,000 kilograms each. I told Ned Land and Conseil that farseeing nature had given these mammals a major role to play.
So it follows that at 320 feet down, this pressure is equal to ten atmospheres, to 100 atmospheres at 3,200 feet, and to 1,000 atmospheres at 32,000 feet, that is, at about two and a half vertical leagues down. Which is tantamount to saying that if you could reach such a depth in the ocean, each square centimeter on your body's surface would be experiencing 1,000 kilograms of pressure.
So at thirty-two feet beneath the surface of the sea, you'll undergo a pressure of 17,568 kilograms; at 320 feet, or ten times greater pressure, it's 175,680 kilograms; at 3,200 feet, or 100 times greater pressure, it's 1,756,800 kilograms; finally, at 32,000 feet, or 1,000 times greater pressure, it's 17,568,000 kilograms; in other words, you'd be squashed as flat as if you'd just been yanked from between the plates of a hydraulic press!"
The rates were thus fixed on gross measurement: for iron and steel steamships, one hundred and forty-five francs per ton; for sailing-ships, ninety-five francs per ton: these bounties to decrease annually to four francs and fifty centimes for steamships and three francs ninety centimes for sailing-ships during the first ten years of the law's application, thereafter to stand at one hundred francs and sixty-five francs, respectively; for engines and auxiliary apparatus, twenty-seven francs fifty centimes per hundred kilograms.
The French made a strong attack on the Metz region on the same day, October 22, 1916, employing twenty-four machines. They claimed that these dropped 4,200 kilograms of bombs on blast furnaces at Hagodange and Pussings north of Metz, and also on the railway stations at Thionville, Mezures-les-Betz, Longwy, and Metz-Sablons. German aeroplanes dropped several bombs on Lunéville.
To accomplish my plans I require hundreds of millions in gold, other hundreds of millions in platinum and noble metal, and some five kilograms of the bromide of radium all of which I shall take from the planets of this Solar System before I leave it. I shall take them in spite of the puerile efforts of the fleets of your Triplanetary League.
If at this point you want to empty the supplementary ballast tanks in order to lighten your boat and rise to the surface, your pumps must overcome that pressure of 100 atmospheres, which is 100 kilograms per each square centimeter. This demands a strength " "That electricity alone can give me," Captain Nemo said swiftly. "Sir, I repeat: the dynamic power of my engines is nearly infinite.
At this point the sorters begin their twofold task. First they remove the layers of mother-of-pearl, which are known in the industry by the names legitimate silver, bastard white, or bastard black, and these are shipped out in cases weighing 125 to 150 kilograms. Then they remove the oyster's meaty tissue, boil it, and finally strain it, in order to extract even the smallest pearls."
"Fire and brimstone!" Ned put in. "All right then, my fine harpooner, if vertebrates several hundred meters long and proportionate in bulk live at such depths, their surface areas make up millions of square centimeters, and the pressure they undergo must be assessed in billions of kilograms.
Inside the box you can hear a gentle but steady tick, tick, tick. The clock-work is wound up and set to the exact second. Tick, tick, tick it goes. When the ship is far out at sea and the passengers are asleep and the watch calls out: "Lights are burning. All's well!" then the works will have run down, the spring will stop and loosen a little hammer. Ten kilograms of dynamite suffice.
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