20,000 LEAGUES UNDER THE SEA (Illustrated Edition). Jules Verne

dealing with the subject, for which one day I felt compelled to take him to task.

      During the magnificent evening of June 25—in other words, three weeks after our departure—the frigate lay abreast of Cabo Blanco, thirty miles to leeward of the coast of Patagonia. We had crossed the Tropic of Capricorn, and the Strait of Magellan opened less than 700 miles to the south. Before eight days were out, the Abraham Lincoln would plow the waves of the Pacific.

      Seated on the afterdeck, Ned Land and I chatted about one thing and another, staring at that mysterious sea whose depths to this day are beyond the reach of human eyes. Quite naturally, I led our conversation around to the giant unicorn, and I weighed our expedition’s various chances for success or failure. Then, seeing that Ned just let me talk without saying much himself, I pressed him more closely.

      “Ned,” I asked him, “how can you still doubt the reality of this cetacean we’re after? Do you have any particular reasons for being so skeptical?”

      The harpooner stared at me awhile before replying, slapped his broad forehead in one of his standard gestures, closed his eyes as if to collect himself, and finally said: “Just maybe, Professor Aronnax.”

      “But Ned, you’re a professional whaler, a man familiar with all the great marine mammals—your mind should easily accept this hypothesis of an enormous cetacean, and you ought to be the last one to doubt it under these circumstances!”

      “That’s just where you’re mistaken, professor,” Ned replied. “The common man may still believe in fabulous comets crossing outer space, or in prehistoric monsters living at the earth’s core, but astronomers and geologists don’t swallow such fairy tales. It’s the same with whalers. I’ve chased plenty of cetaceans, I’ve harpooned a good number, I’ve killed several. But no matter how powerful and well armed they were, neither their tails or their tusks could puncture the sheet-iron plates of a steamer.”

      “Even so, Ned, people mention vessels that narwhale tusks have run clean through.”

      “Wooden ships maybe,” the Canadian replied. “But I’ve never seen the like. So till I have proof to the contrary, I’ll deny that baleen whales, sperm whales, or unicorns can do any such thing.”

      “Listen to me, Ned—”

      “No, no, professor. I’ll go along with anything you want except that. Some gigantic devilfish maybe… ?”

      “Even less likely, Ned. The devilfish is merely a mollusk, and even this name hints at its semiliquid flesh, because it’s Latin meaning, ‘soft one.’ The devilfish doesn’t belong to the vertebrate branch, and even if it were 500 feet long, it would still be utterly harmless to ships like the Scotia or the Abraham Lincoln. Consequently, the feats of krakens or other monsters of that ilk must be relegated to the realm of fiction.”

      “So, Mr. Naturalist,” Ned Land continued in a bantering tone, “you’ll just keep on believing in the existence of some enormous cetacean… ?”

      “Yes, Ned, I repeat it with a conviction backed by factual logic. I believe in the existence of a mammal with a powerful constitution, belonging to the vertebrate branch like baleen whales, sperm whales, or dolphins, and armed with a tusk made of horn that has tremendous penetrating power.”

      “Humph!” the harpooner put in, shaking his head with the attitude of a man who doesn’t want to be convinced.

      “Note well, my fine Canadian,” I went on, “if such an animal exists, if it lives deep in the ocean, if it frequents the liquid strata located miles beneath the surface of the water, it needs to have a constitution so solid, it defies all comparison.”

      “And why this powerful constitution?” Ned asked.

      “Because it takes incalculable strength just to live in those deep strata and withstand their pressure.”

      “Oh really?” Ned said, tipping me a wink.

      “Oh really, and I can prove it to you with a few simple figures.”

      “Bosh!” Ned replied. “You can make figures do anything you want!”

      “In business, Ned, but not in mathematics. Listen to me. Let’s accept that the pressure of one atmosphere is represented by the pressure of a column of water thirty-two feet high. In reality, such a column of water wouldn’t be quite so high because here we’re dealing with salt water, which is denser than fresh water. Well then, when you dive under the waves, Ned, for every thirty-two feet of water above you, your body is tolerating the pressure of one more atmosphere, in other words, one more kilogram per each square centimeter on your body’s surface. 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. Now, my gallant Ned, do you know how many square centimeters you have on your bodily surface?”

      “I haven’t the foggiest notion, Professor Aronnax.”

      “About 17,000.”

      “As many as that?”

      “Yes, and since the atmosphere’s pressure actually weighs slightly more than one kilogram per square centimeter, your 17,000 square centimeters are tolerating 17,568 kilograms at this very moment.”

      “Without my noticing it?”

      “Without your noticing it. And if you aren’t crushed by so much pressure, it’s because the air penetrates the interior of your body with equal pressure. When the inside and outside pressures are in perfect balance, they neutralize each other and allow you to tolerate them without discomfort. But in the water it’s another story.”

      “Yes, I see,” Ned replied, growing more interested. “Because the water surrounds me but doesn’t penetrate me.”

      “Precisely, Ned. 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!”

      “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. Calculate, then, how much resistance of bone structure and strength of constitution they’d need in order to withstand such pressures!”

      “They’d need to be manufactured,” Ned Land replied, “from sheet-iron plates eight inches thick, like ironclad frigates.”

      “Right, Ned, and then picture the damage such a mass could inflict if it were launched with the speed of an express train against a ship’s hull.”

      “Yes… indeed… maybe,” the Canadian replied, staggered by these figures but still not willing to give in.

      “Well, have I convinced you?”

      “You’ve convinced me of one thing, Mr. Naturalist. That deep in the sea, such animals would need to be just as strong as you say—if they exist.”

      “But if they don’t exist, my stubborn harpooner, how do you explain the accident that happened to the Scotia?”

      “It’s maybe…,” Ned said, hesitating.

      “Go on!”

      “Because… it just couldn’t be true!” the Canadian replied, unconsciously echoing a famous catchphrase of the scientist Arago.

      But this reply proved nothing, other than how bullheaded