I wriggled myself quickly to the top of the being, or object, half out of the water, which served us for a refuge














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It follows, then, that at 320 feet this pressure equals that of 10 atmospheres, of 100 atmospheres at 3,200 feet, and of 1,000 atmospheres at 32,000 feet, that is, about 6 miles; which is equivalent to saying that if you could attain this depth in the ocean, each square three-eighths of an inch of the surface of your body would bear a pressure of 5,600 lb? The Abraham Lincoln kept up half-steam, and advanced cautiously so as not to awake its adversary!

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